CN104485739A - Electric power circuit monitoring and protection device and protection method - Google Patents
Electric power circuit monitoring and protection device and protection method Download PDFInfo
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- CN104485739A CN104485739A CN201410745220.7A CN201410745220A CN104485739A CN 104485739 A CN104485739 A CN 104485739A CN 201410745220 A CN201410745220 A CN 201410745220A CN 104485739 A CN104485739 A CN 104485739A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Abstract
The invention provides an electric power circuit monitoring and protection device and a protection method. The electric power circuit monitoring and protection device comprises a switching value input circuit, an analog input circuit, a switching value output circuit, an alarm module and a central processing unit, wherein a signal output end of the switching value input circuit is connected with a switching value signal input end of the central processing unit; a switching value signal output end of the central processing unit is connected with a signal input end of the switching value output circuit; the analog input circuit is connected with an analog-to-digital conversion signal input end of the central processing unit through an analog-to-digital conversion circuit; a display signal output end of the central processing unit is connected with the alarm module.
Description
Technical field
The present invention relates to electronic circuit field, particularly relate to a kind of power monitoring circuit protective device and guard method.
Background technology
Society; national grid coverage rate generally improves; bring great convenience to the productive life of people; while electrical network coverage rate improves; safe operation of electric network and stable supervisory control system are not promoted timely; even if having developed some power monitoring circuit equipment; its useful life is short; saltus step is serious; can not overvoltage protection, can not prevent filtering from disturbing, so cause power monitoring circuit error; can not accurately judge power circuit problem, so need those skilled in the art badly to solve corresponding technical problem.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art, especially innovatively proposes a kind of power monitoring circuit protective device.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of power monitoring circuit protective device, its key is, comprising: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model output connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog-to-digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display output connects alarm module.
The beneficial effect of technique scheme is: by switching value input circuit and the real-time power supply situation of simulated measurement input circuit transferring electric power circuit, ensure power circuit steady operation, by alarm module real-time reminding custom power circuit using state, circuit design is reasonable, moderate cost.
Described power monitoring circuit protective device, preferably, described switching value input circuit comprises: the 11 resistance, the 12 resistance, the 13 resistance, the 16 diode, the first photoelectric coupled circuit,
Switching circuit one end connects the 11 resistance one end, the described 11 resistance other end connects the 12 resistance one end, the described 12 resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16 diode cathode, described 16 diode cathode also connects power supply, described 16 diode cathode connects the 12 resistance other end, described first photoelectric coupled circuit the 6th output connects power supply, and described first photoelectric coupled circuit the 4th output connects central processing unit signal input part.
The beneficial effect of technique scheme is: described switching value input circuit gathers On-off signal signal, ensures stable signal transmission.
Described power monitoring circuit protective device, preferably, described switching value output circuit comprises: the 41 resistance, the second photoelectric coupled circuit, relay,
41 resistance one end connects central processing unit switching value output signal end, the described 41 resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th output connects relay normally-closed contact.
The beneficial effect of technique scheme is: by central processing unit transmitting switch amount output signal, ensured the stability of signal transmission by switching value output circuit.
Described power monitoring circuit protective device, preferably, described simulated measurement input circuit comprises: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input signal frequency conversion signal output part rate of connections conversion process circuit signal input, described frequency conversion process circuit signal output connects central processing unit analog-to-digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal output rate of connections conversion process circuit reference signal input part.
The beneficial effect of technique scheme is: by circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit coordinated, ensures the transmission of analog input signal.
Described power monitoring circuit protective device, preferably, described circuit of sampling input comprises: the 14 resistance, the 19 resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14 resistance one end, the described 14 resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 6th high tension silicon rectifier second input, described 6th high tension silicon rectifier the 3rd output connects the 19 resistance one end, the described 19 resistance other end connects the 6th high tension silicon rectifier the 4th output, described 19 resistance one end also connects the 4th amplifier anode, described 4th amplifier minus earth;
Described circuit of sampling input also comprises: the 34 resistance, the 39 resistance, the 14 amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34 resistance one end, the described 34 resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 7th high tension silicon rectifier second input, described 7th high tension silicon rectifier the 3rd output connects the 39 resistance one end, the described 39 resistance other end connects the 7th high tension silicon rectifier the 4th output, described 39 resistance one end also connects the 14 amplifier anode, described 14 amplifier minus earth.
The beneficial effect of technique scheme is: circuit of sampling input stable signal transmission is reliable.
Described power monitoring circuit protective device; preferably; described reference signal initialization circuit comprises: the 23 resistance, the 24 resistance, the 25 resistance, the 26 resistance, the 15 diode, the 5th electric capacity, the 11 electric capacity, the 13 electric capacity, the 14 electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23 resistance one end, the described 23 resistance other end connects the 15 diode cathode, described 15 diode cathode ground connection, the described 23 resistance other end also connects the 5th electric capacity one end, the described 5th electric capacity other end connects the 25 resistance one end and ground connection, the described 25 resistance other end connects the 24 resistance one end, the described 24 resistance other end connects the 5th electric capacity one end, described 24 resistance one end also connects the 11 electric capacity one end, described 11 electric capacity other end ground connection, described 11 electric capacity one end also connects the 13 electric capacity one end, described 13 electric capacity other end ground connection, described 24 resistance one end also connects the 26 resistance one end, the described 26 resistance other end connects the 14 electric capacity one end, described 14 electric capacity other end ground connection, described 13 electric capacity one end also connects the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th output, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th output.
The beneficial effect of technique scheme is: reference signal initialization circuit arranges reference signal value, is transferred in circuit of sampling input, provides reference signal value, is transferred to central processing unit for comparing output voltage.
Described power monitoring circuit protective device; preferably; described frequency conversion process circuit also comprises: the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 29 resistance, the 27 resistance, the 30 resistance, the 11 diode, the 12 diode, the 15 electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15 resistance one end, the described 15 resistance other end connects the second amplifier anode and the 16 resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29 resistance one end, the described 29 resistance other end connects the 11 diode cathode respectively, 12 diode cathode and the 15 electric capacity one end, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, connect the first amplifier negative pole again, described first amplifier anode connects the 15 electric capacity one end, described first amplifier out connects the 30 resistance one end, the described 30 resistance other end connects power supply, described first amplifier out also connects central processing unit, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, also connect the 27 resistance one end, the described 27 resistance other end connects the 3rd amplifier out, described 3rd amplifier out also connects the 3rd amplifier negative pole, described 3rd amplifier anode connects one end after the 17 resistance and the 18 resistor coupled in parallel, described 17 resistance connects the 14 amplifier out.
The beneficial effect of technique scheme is: frequency conversion process circuit design circuit location wiring is reasonable, and carrying out frequency processing can separate with clock frequency.
Described power monitoring circuit protective device; preferably; described frequency conversion process circuit also comprises: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21 resistance, the 22 resistance, the 28 resistance, the 13 diode, the 14 diode, the 8th electric capacity
14 amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out also connects the 22 resistance one end, the 22 resistance other end connects the 13 diode cathode, described 13 diode cathode connects the 21 resistance one end and the 14 diode cathode respectively, described 14 diode cathode connects the 13 diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14 diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end also connects the 7th amplifier anode, described 7th amplifier out connects the 28 resistance one end, the described 28 resistance other end connects power supply, the 21 resistance other end connects the 9th amplifier out, described 9th amplifier out also connects the 9th amplifier negative pole.
The beneficial effect of technique scheme is: frequency conversion process circuit design circuit location wiring is reasonable, and carrying out frequency processing can separate with clock frequency.
Described power monitoring circuit protective device, preferably, also comprise anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop comprises: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end also connects the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end also connects the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end also connects the tenth resistance other end,
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end also connects the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode also connects the tenth resistance other end.
The beneficial effect of technique scheme is: above-mentioned anti-jump loop AC/DC universal; adapt to different running environment; adaptable; prevent the combined floodgate contact because of control switch from failing to return in time; and combined floodgate causes circuit breaker to close continuously and cuts on faulty line; prevent the circuit breaker auxiliary node because of trip(ping) circuit from adjusting improper or conjugating slow simultaneously, cause the first current interruption of protection contact and burn.
The present invention also discloses a kind of power monitoring circuit guard method, and its key is, comprises the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing,
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when voltage signal is greater than voltage definite value, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing,
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, send information warning by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing.
The beneficial effect of technique scheme is: can monitoring power electric circuit in real time by said method, and security of operation is stablized.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
It is reasonable that described monitoring and protecting device relates to circuit; working stability; wherein switching value input circuit, switching value output circuit meet AC and DC environment; conform extensively; the optocoupler cost used is low, and wherein simulated measurement input circuit is with low cost, meets the working condition of power monitoring circuit; frequency conversion process circuit output signal is stablized, and described buffer circuit is cost-saving.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is power monitoring circuit protective device general illustration of the present invention;
Fig. 2 is power monitoring circuit protective device switching value input circuit schematic diagram of the present invention;
Fig. 3 is power monitoring circuit protective device switching value output circuit schematic diagram of the present invention;
Fig. 4 is power monitoring circuit protective device switching value output circuit schematic diagram of the present invention;
Fig. 5 is power monitoring circuit protective device reference signal initialization circuit schematic diagram of the present invention;
Fig. 6 is power monitoring circuit protective device frequency conversion process circuit diagram of the present invention;
Fig. 7 is power monitoring circuit protective device frequency conversion process circuit diagram of the present invention;
Fig. 8 is power monitoring circuit protective device power circuit schematic diagram of the present invention;
Fig. 9 is power monitoring circuit protective device anti-jump loop schematic diagram of the present invention;
Figure 10-12 is workflow diagrams of power monitoring circuit guard method of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, the invention provides a kind of power monitoring circuit protective device, its key is, comprising: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model output connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog-to-digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display output connects alarm module.
The beneficial effect of technique scheme is: by switching value input circuit and the real-time power supply situation of simulated measurement input circuit transferring electric power circuit, ensure power circuit steady operation, by alarm module real-time reminding custom power circuit using state, circuit design is reasonable, moderate cost.
As shown in Figure 2, described power monitoring circuit protective device, preferably, described switching value input circuit comprises: the 11 resistance, the 12 resistance, the 13 resistance, the 16 diode, the first photoelectric coupled circuit,
Switching circuit one end connects the 11 resistance one end, the described 11 resistance other end connects the 12 resistance one end, the described 12 resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16 diode cathode, described 16 diode cathode also connects power supply, described 16 diode cathode connects the 12 resistance other end, described first photoelectric coupled circuit the 6th output connects power supply, and described first photoelectric coupled circuit the 4th output connects central processing unit signal input part.
The beneficial effect of technique scheme is: described switching value input circuit gathers On-off signal signal, ensures stable signal transmission.
As shown in Figure 3, described power monitoring circuit protective device, preferably, described switching value output circuit comprises: the 41 resistance, the second photoelectric coupled circuit, relay,
41 resistance one end connects central processing unit switching value output signal end, the described 41 resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th output connects relay normally-closed contact.
The beneficial effect of technique scheme is: by central processing unit transmitting switch amount output signal, ensured the stability of signal transmission by switching value output circuit.
As shown in figs. 4-7, described power monitoring circuit protective device, preferably, described simulated measurement input circuit comprises: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input signal frequency conversion signal output part rate of connections conversion process circuit signal input, described frequency conversion process circuit signal output connects central processing unit analog-to-digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal output rate of connections conversion process circuit reference signal input part.
The beneficial effect of technique scheme is: by circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit coordinated, ensures the transmission of analog input signal.
Described power monitoring circuit protective device, preferably, described circuit of sampling input comprises: the 14 resistance, the 19 resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14 resistance one end, the described 14 resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 6th high tension silicon rectifier second input, described 6th high tension silicon rectifier the 3rd output connects the 19 resistance one end, the described 19 resistance other end connects the 6th high tension silicon rectifier the 4th output, described 19 resistance one end also connects the 4th amplifier anode, described 4th amplifier minus earth;
Described circuit of sampling input also comprises: the 34 resistance, the 39 resistance, the 14 amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34 resistance one end, the described 34 resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 7th high tension silicon rectifier second input, described 7th high tension silicon rectifier the 3rd output connects the 39 resistance one end, the described 39 resistance other end connects the 7th high tension silicon rectifier the 4th output, described 39 resistance one end also connects the 14 amplifier anode, described 14 amplifier minus earth.
The beneficial effect of technique scheme is: circuit of sampling input stable signal transmission is reliable.
Described power monitoring circuit protective device; preferably; described reference signal initialization circuit comprises: the 23 resistance, the 24 resistance, the 25 resistance, the 26 resistance, the 15 diode, the 5th electric capacity, the 11 electric capacity, the 13 electric capacity, the 14 electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23 resistance one end, the described 23 resistance other end connects the 15 diode cathode, described 15 diode cathode ground connection, the described 23 resistance other end also connects the 5th electric capacity one end, the described 5th electric capacity other end connects the 25 resistance one end and ground connection, the described 25 resistance other end connects the 24 resistance one end, the described 24 resistance other end connects the 5th electric capacity one end, described 24 resistance one end also connects the 11 electric capacity one end, described 11 electric capacity other end ground connection, described 11 electric capacity one end also connects the 13 electric capacity one end, described 13 electric capacity other end ground connection, described 24 resistance one end also connects the 26 resistance one end, the described 26 resistance other end connects the 14 electric capacity one end, described 14 electric capacity other end ground connection, described 13 electric capacity one end also connects the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th output, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th output.
The beneficial effect of technique scheme is: reference signal initialization circuit arranges reference signal value, is transferred in circuit of sampling input, provides reference signal value, is transferred to central processing unit for comparing output voltage.
Described power monitoring circuit protective device; preferably; described frequency conversion process circuit also comprises: the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 29 resistance, the 27 resistance, the 30 resistance, the 11 diode, the 12 diode, the 15 electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15 resistance one end, the described 15 resistance other end connects the second amplifier anode and the 16 resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29 resistance one end, the described 29 resistance other end connects the 11 diode cathode respectively, 12 diode cathode and the 15 electric capacity one end, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, connect the first amplifier negative pole again, described first amplifier anode connects the 15 electric capacity one end, described first amplifier out connects the 30 resistance one end, the described 30 resistance other end connects power supply, described first amplifier out also connects central processing unit, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, also connect the 27 resistance one end, the described 27 resistance other end connects the 3rd amplifier out, described 3rd amplifier out also connects the 3rd amplifier negative pole, described 3rd amplifier anode connects one end after the 17 resistance and the 18 resistor coupled in parallel, described 17 resistance connects the 14 amplifier out.
The beneficial effect of technique scheme is: frequency conversion process circuit design circuit location wiring is reasonable, and carrying out frequency processing can separate with clock frequency.
Described power monitoring circuit protective device; preferably; described frequency conversion process circuit also comprises: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21 resistance, the 22 resistance, the 28 resistance, the 13 diode, the 14 diode, the 8th electric capacity
14 amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out also connects the 22 resistance one end, the 22 resistance other end connects the 13 diode cathode, described 13 diode cathode connects the 21 resistance one end and the 14 diode cathode respectively, described 14 diode cathode connects the 13 diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14 diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end also connects the 7th amplifier anode, described 7th amplifier out connects the 28 resistance one end, the described 28 resistance other end connects power supply, the 21 resistance other end connects the 9th amplifier out, described 9th amplifier out also connects the 9th amplifier negative pole.
The beneficial effect of technique scheme is: frequency conversion process circuit design circuit location wiring is reasonable, and carrying out frequency processing can separate with clock frequency.
As shown in Figure 8, described power monitoring circuit protective device, preferably, also comprises power circuit, and described power circuit output end connects central processing unit energization input;
Described power circuit comprises: the first pressurizer, the second inductance, the 20 resistance, the 19 electric capacity, the 9th electric capacity,
Power end connects the first pressurizer input, described first output end of voltage stabilizer connects second inductance one end, the described second inductance other end connects the 20 resistance one end, the described 20 resistance other end connects the 19 electric capacity one end and the 9th electric capacity one end, the described 20 resistance other end also connects central processing unit energization input, the described 19 electric capacity other end and the 9th electric capacity other end ground connection.
The beneficial effect of technique scheme is: the power supply that power-supplying circuit provides central processing unit stable exports, and circuit design is reasonable.
As shown in Figure 9, described power monitoring circuit protective device, preferably, also comprise anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop comprises: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end also connects the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end also connects the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end also connects the tenth resistance other end,
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end also connects the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode also connects the tenth resistance other end.
The beneficial effect of technique scheme is: above-mentioned anti-jump loop AC/DC universal; adapt to different running environment; adaptable; prevent the combined floodgate contact because of control switch from failing to return in time; and combined floodgate causes circuit breaker to close continuously and cuts on faulty line; prevent the circuit breaker auxiliary node because of trip(ping) circuit from adjusting improper or conjugating slow simultaneously, cause the first current interruption of protection contact and burn.
As shown in figs. 10-12, the present invention also discloses a kind of power monitoring circuit guard method, and its key is, comprises the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing,
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when voltage signal is greater than voltage definite value, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing,
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, send information warning by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing.
The beneficial effect of technique scheme is: can monitoring power electric circuit in real time by said method, and security of operation is stablized.
Communication chip adopts MAX485E;
Described alarm module is LED display;
First pressurizer is preferably LM1117;
The preferred model of described amplifier is MCP6002T;
The preferred model of central processing unit is LPC1768.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a power monitoring circuit protective device, is characterized in that, comprising: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model output connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog-to-digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display output connects alarm module.
2. power monitoring circuit protective device according to claim 1, is characterized in that, described switching value input circuit comprises: the 11 resistance, the 12 resistance, the 13 resistance, the 16 diode, the first photoelectric coupled circuit,
Switching circuit one end connects the 11 resistance one end, the described 11 resistance other end connects the 12 resistance one end, the described 12 resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16 diode cathode, described 16 diode cathode also connects power supply, described 16 diode cathode connects the 12 resistance other end, described first photoelectric coupled circuit the 6th output connects power supply, and described first photoelectric coupled circuit the 4th output connects central processing unit signal input part.
3. power monitoring circuit protective device according to claim 1, is characterized in that, described switching value output circuit comprises: the 41 resistance, the second photoelectric coupled circuit, relay,
41 resistance one end connects central processing unit switching value output signal end, the described 41 resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th output connects relay normally-closed contact.
4. power monitoring circuit protective device according to claim 1, is characterized in that, described simulated measurement input circuit comprises: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input signal frequency conversion signal output part rate of connections conversion process circuit signal input, described frequency conversion process circuit signal output connects central processing unit analog-to-digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal output rate of connections conversion process circuit reference signal input part.
5. power monitoring circuit protective device according to claim 4, is characterized in that, described circuit of sampling input comprises: the 14 resistance, the 19 resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14 resistance one end, the described 14 resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 6th high tension silicon rectifier second input, described 6th high tension silicon rectifier the 3rd output connects the 19 resistance one end, the described 19 resistance other end connects the 6th high tension silicon rectifier the 4th output, described 19 resistance one end also connects the 4th amplifier anode, described 4th amplifier minus earth;
Described circuit of sampling input also comprises: the 34 resistance, the 39 resistance, the 14 amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34 resistance one end, the described 34 resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity second input connects the 7th high tension silicon rectifier second input, described 7th high tension silicon rectifier the 3rd output connects the 39 resistance one end, the described 39 resistance other end connects the 7th high tension silicon rectifier the 4th output, described 39 resistance one end also connects the 14 amplifier anode, described 14 amplifier minus earth.
6. power monitoring circuit protective device according to claim 4; it is characterized in that; described reference signal initialization circuit comprises: the 23 resistance, the 24 resistance, the 25 resistance, the 26 resistance, the 15 diode, the 5th electric capacity, the 11 electric capacity, the 13 electric capacity, the 14 electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23 resistance one end, the described 23 resistance other end connects the 15 diode cathode, described 15 diode cathode ground connection, the described 23 resistance other end also connects the 5th electric capacity one end, the described 5th electric capacity other end connects the 25 resistance one end and ground connection, the described 25 resistance other end connects the 24 resistance one end, the described 24 resistance other end connects the 5th electric capacity one end, described 24 resistance one end also connects the 11 electric capacity one end, described 11 electric capacity other end ground connection, described 11 electric capacity one end also connects the 13 electric capacity one end, described 13 electric capacity other end ground connection, described 24 resistance one end also connects the 26 resistance one end, the described 26 resistance other end connects the 14 electric capacity one end, described 14 electric capacity other end ground connection, described 13 electric capacity one end also connects the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th output, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th output.
7. power monitoring circuit protective device according to claim 4; it is characterized in that; described frequency conversion process circuit also comprises: the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 29 resistance, the 27 resistance, the 30 resistance, the 11 diode, the 12 diode, the 15 electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15 resistance one end, the described 15 resistance other end connects the second amplifier anode and the 16 resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29 resistance one end, the described 29 resistance other end connects the 11 diode cathode respectively, 12 diode cathode and the 15 electric capacity one end, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, connect the first amplifier negative pole again, described first amplifier anode connects the 15 electric capacity one end, described first amplifier out connects the 30 resistance one end, the described 30 resistance other end connects power supply, described first amplifier out also connects central processing unit, described 11 diode cathode, after 12 diode cathode is connected with the 15 electric capacity other end, also connect the 27 resistance one end, the described 27 resistance other end connects the 3rd amplifier out, described 3rd amplifier out also connects the 3rd amplifier negative pole, described 3rd amplifier anode connects one end after the 17 resistance and the 18 resistor coupled in parallel, described 17 resistance connects the 14 amplifier out.
8. power monitoring circuit protective device according to claim 4; it is characterized in that; described frequency conversion process circuit also comprises: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21 resistance, the 22 resistance, the 28 resistance, the 13 diode, the 14 diode, the 8th electric capacity
14 amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out also connects the 22 resistance one end, the 22 resistance other end connects the 13 diode cathode, described 13 diode cathode connects the 21 resistance one end and the 14 diode cathode respectively, described 14 diode cathode connects the 13 diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14 diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end also connects the 7th amplifier anode, described 7th amplifier out connects the 28 resistance one end, the described 28 resistance other end connects power supply, the 21 resistance other end connects the 9th amplifier out, described 9th amplifier out also connects the 9th amplifier negative pole.
9. power monitoring circuit protective device according to claim 2, it is characterized in that, also comprise anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop comprises: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end also connects the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end also connects the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end also connects the tenth resistance other end,
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end also connects the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode also connects the tenth resistance other end.
10. a power monitoring circuit guard method, is characterized in that, comprises the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing,
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when voltage signal is greater than voltage definite value, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing,
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start image data, the data of the data that storage chip stores and the collection of frequency conversion process circuit are resolved by CPU, warning alert is carried out by central processing unit by alarm module when current signal is greater than current ration, on screen, show information warning simultaneously, carry out output by relay to control, if when detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receive press off lock signal again time, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing, when on-off model receive open into co-bit signal time, send information warning by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, carry out output by relay to control, open into co-bit signal if do not received, return and again carry out cpu signal parsing.
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