CN102135594A - Insulation state monitoring device of high voltage motor for main fan used for mine - Google Patents
Insulation state monitoring device of high voltage motor for main fan used for mine Download PDFInfo
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- CN102135594A CN102135594A CN2011100352365A CN201110035236A CN102135594A CN 102135594 A CN102135594 A CN 102135594A CN 2011100352365 A CN2011100352365 A CN 2011100352365A CN 201110035236 A CN201110035236 A CN 201110035236A CN 102135594 A CN102135594 A CN 102135594A
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Abstract
The invention discloses an insulation state monitoring device of a high voltage motor for a main fan used for mines, aiming to monitor insulation parameters, such as stator temperature, insulation resistance, local discharging parameters and the like on line so as to improve the stability and the reliability of the main fan for mines. The insulation state monitoring device comprises a local discharging sensor unit, a local discharging signal amplification unit, a local discharging signal filter unit, a three-phase voltage transformer, a trigger signal generation unit, a data acquisition board, a three-phase reactor unit, a sampling resistance network unit, an insulation resistance signal conditioning unit, an insulation resistance signal A/D conversion unit, a temperature sensor unit, a temperature signal conditioning unit, a coprocessing CPU (Central Processing Unit) unit, an RS-485 communication unit and an industrial control computer, wherein the local discharging sensor unit is composed of three local discharging sensors; the primary side of the three-phase voltage transformer is connected with a three-phase high-voltage power grid; the secondary side of the three-phase voltage transformer is connected into the trigger signal generation unit; and the industrial control computer has the main frequency of 3GHz, a memory of 4G and a hard disk of 500G.
Description
Technical field
The present invention relates to mine main ventilator on-line monitoring and fault diagnosis field, particularly a kind of main fan for mines high-tension motor insulation state monitoring device.
Technical background
Mine main ventilator is one of key equipment of mine production, it is being born and is watering down gas density, takes away harmful dust, the important task of fresh air is provided to the personnel in the pit, the production safety of mine and workman's life security will be jeopardized if break down, can come immeasurable loss by the coal supply mine belt, cause abominable social influence.The mine main ventilator motor is the most complicated parts of mine main ventilator, and the motor Insulation Problems will be the major safety risks of Coal Production if can not in time find.Therefore, mine main ventilator is carried out on-line monitoring with the high-tension motor state of insulation, potential insulation fault is carried out early warning, help to prevent that sudden accident from the threat of potential faults to mine safety taking place, eliminating, Safety of Coal Mine Production is of great practical significance.Want to address the above problem, press for a kind ofly measure accurately, the mine main ventilator high-tension motor insulation line monitoring device of dependable performance, perfect in shape and function; Because the main ventilation passage contains methane gas, necessarily require motor field frame sealing, explosion-proof.Therefore the installing of monitoring device, requirement can not change the motor body structure.
Summary of the invention
The present invention seeks to overcome the deficiency of above-mentioned prior art, provide a kind of to insulation parameter on-line monitorings such as stator temperature, insulation resistance and shelf depreciation, with the main fan for mines of the stability that improves mine main ventilator and reliability with high-tension motor insulation state monitoring device.
Apparatus of the present invention comprise that local discharge sensor unit, local discharge signal amplifying unit, local discharge signal filter unit, threephase potential transformer, trigger pip generating unit, data collecting card, three-phase reactor unit, sample resistance network element, insulation resistance signal condition unit, insulation resistance signal A/D converting unit, temperature sensor unit, temperature signal regulation unit, association handle CPU element, RS-485 communication unit and industrial computer.
Partial discharge monitoring is used the coupling condenser method, uses coupling condenser to insert the high-voltage connection end, picks up local discharge signal, behind signal condition, enters data collecting card; In addition, for obtaining discharge pulse phase place accurately, design trigger pip generation circuit begins to gather at power supply signal rising edge trigger data acquisition card.The local discharge sensor unit is made up of three local discharge sensors (U1/U2/U3), local discharge sensor is made of coupling condenser and resistance, capacitor one end links to each other with high-voltage fence, an end resistance grounded, and capacitor and resistance joint insert the local discharge signal amplifying unit.
The local discharge signal amplifying unit comprises multi-channel gating switch 74VHC4051, digital regulation resistance X9110, two groups of high speed operation amplifier AD844, three groups of photoelectrical coupler TLP127 and four groups of high-speed photoelectric coupler 6N137.Be connected with the local discharge signal filter unit after multi-channel gating switch 74VHC4051 (U4), digital regulation resistance X9110 (U5), high speed operation amplifier AD844 (U6) and high speed operation amplifier AD844 (U7) cascade, multi-channel gating switch 74VHC4051 (U4) address end is handled CPU element through photoelectrical coupler TLP137 and association and is connected, and digital regulation resistance X9110 (U5) handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected.
The local discharge signal filter unit comprises two groups of high speed operation amplifier AD844 and low-pass filter LT6600IS8-20.Insert the data receiver of data collecting card (U18) after high speed operation amplifier AD844 (U8), high speed operation amplifier AD844 (U9) and low-pass filter LT6600IS8-20 (U10) cascade.
The former limit of threephase potential transformer (U11) links to each other with the three-phase high-voltage electrical network, and the three-phase secondary inserts the trigger pip generating unit.The trigger pip generating unit comprises three groups of micro mutual inductor SPT204A, multi-channel gating switch 74VHC4051, operational amplifier LM358, operational amplifier LM324 and photoelectrical coupler TLP137.The input end of three groups of micro mutual inductor SPT204A (U12/U13/U14) links to each other with the three-phase secondary of threephase potential transformer respectively, output terminal inserts multi-channel gating switch 74VHC4051 (U15), insert the trigger end of data collecting card (U18) after multi-channel gating switch 74VHC4051 (U15), operational amplifier LM358 (U16), operational amplifier LM324 (U17) cascade, the address end of multi-channel gating switch 74VHC4051 (U15) is handled CPU element through photoelectrical coupler TLP127 and association and is connected.Data collecting card (U18) has two paths, and the highest real-time sampling rate of every paths is 65MS/s, and A/D resolution is 14, and expansion has the 512MB plate to carry SODIMM SDRAM storer, and data collecting card is connected with industrial computer (U43) by pci interface.
Additional direct current monitoring method is used in the monitoring of insulation resistance, utilizes the DC voltage of three-phase reactor general+48V to be added on generator stator winding insulation and the sample resistance series circuit, calculates the insulation resistance resistance according to the partial pressure value on the sample resistance.
The three-phase reactor unit comprises three-phase reactor, direct current 48V power supply, double T rejector circuit and series connection L type low-pass filter circuit.The former edge joint of three-phase reactor (U19) is gone into the three-phase alternating current high-voltage fence, forms a neutral point behind the secondary short circuit, and neutral point is through the negative pole of a series of resistance access direct current 48V power supplys, and the positive pole of direct current 48V power supply is connected with the sample resistance network element.Neutral point inserts the double T rejector circuit that is made up of resistance, electric capacity and links to each other with the earth with series connection L type low-pass filter circuit.The sample resistance network element comprises semifixed resistor, four groups of sample resistances, three groups of midget relay G5V-1, three groups of photoelectrical coupler TLP137 and operational amplifier OP07.Four groups of sample resistance series connection are after semifixed resistor inserts the earth, and the input end of operational amplifier OP07 (U23) is inserted at the two ends of series connection sample resistance, and the output terminal of OP07 (U23) inserts insulation resistance signal condition unit.The resistance of four groups of sample resistances is respectively 10M Ω, 1M Ω, 100k Ω and 10k Ω, resistance is that the sample resistance of 10M Ω, 1M Ω, 100k Ω is in parallel with three groups of midget relay G5V-1 (U20/U21/U22) respectively, and the control contact of midget relay G5V-1 (U20/U21/U22) is handled CPU element through photoelectrical coupler TLP127 and association and is connected.
Insulation resistance signal condition unit comprises digital regulation resistance X9110, two groups of operational amplifier OP07, high-speed photoelectric coupler 6N137.Insert insulation resistance signal A/D converting unit after digital regulation resistance X9110 (U24), operational amplifier OP07 (U25) and operational amplifier OP07 (U26) cascade, digital regulation resistance X9110 (U24) handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected.Insulation resistance signal A/D converting unit comprises photoelectrical coupler HCNR200, three groups of operational amplifier OP07 and A/D conversion ADS1110.Insert association after operational amplifier OP07 (U27), photoelectrical coupler HCNR200 (U28), operational amplifier OP07 (U29), operational amplifier OP07 (U30) and A/D converter ADS1110 (U31) cascade and handle CPU element.
The temperature sensor unit is made of 3 PT100 thermal resistances (U32/U33/U34), is installed in the stator winding output cut-in temperature signal condition unit.There are three road temperature signal regulation circuit temperature signal regulation unit, first via temperature signal regulation circuit comprises measuring bridge, + 15V direct supply, stabilivolt and two operational amplifier OP07, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U35) through stabilivolt, the inverting input of operational amplifier OP07 (U35) is connected with the two ends of output terminal with PT100 thermal resistance (U32), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U36) input end, and the output terminal of operational amplifier OP07 (U36) is handled CPU element through resistance with association and is connected.The second road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U37) through stabilivolt, the inverting input of operational amplifier OP07 (U37) is connected with the two ends of output terminal with PT100 thermal resistance (U33), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U38) input end, and the output terminal of operational amplifier OP07 (U38) is handled CPU element through resistance with association and is connected.Third Road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U39) through stabilivolt, the inverting input of operational amplifier OP07 (U39) is connected with the two ends of output terminal with PT100 thermal resistance (U34), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U40) input end, and the output terminal of operational amplifier OP07 (U40) is handled CPU element through resistance with association and is connected.
Association handles CPU element and comprises C8051F020 single-chip microcomputer, crystal oscillator, reset button, debugging interface.Crystal oscillator is connected with the crystal oscillator pin I/O mouth of C8051F020 single-chip microcomputer (U0), and reset button is connected with the reset pin I/O mouth of C8051F020 single-chip microcomputer (U0), and debugging interface is connected with the corresponding I/O mouth of C8051F020 single-chip microcomputer (U0).Multi-channel gating switch 74VHC4051 (U4) the address end of local discharge signal amplifying unit through photoelectrical coupler TLP137 respectively with the P2.2 of C8051F020 single-chip microcomputer (U0), P2.3, the P2.4I/O mouth is connected, the digital regulation resistance X9110 (U5) of local discharge signal amplifying unit by the spi bus interface through high-speed photoelectric coupler 6N137 respectively with the P0.2 of C8051F020 single-chip microcomputer (U0), P0.3, P0.4, the P3.2I/O mouth is connected, multi-channel gating switch 74VHC4051 (U15) the address end of trigger pip generating unit through photoelectrical coupler TLP137 respectively with the P3.7 of C8051F020 single-chip microcomputer (U0), P2.0, the P2.1I/O mouth is connected, the control contact of three groups of midget relay G5V-1 (U20/U21/U22) of sample resistance network element through photoelectrical coupler TLP137 respectively with the P3.3 of C8051F020 single-chip microcomputer (U0), P3.4, the P3.5I/O mouth is connected, insulation resistance signal condition unit digital regulation resistance X9110 (U24) is by the P0.2 of spi bus interface through high-speed photoelectric coupler 6N137 and C8051F020 single-chip microcomputer (U0), P0.3, P0.4, the P3.1I/O mouth is connected, the SCL of insulation resistance signal A/D converting unit A/D converter ADS1110 (U31), the P0.6 of SDA end and C8051F020 single-chip microcomputer (U0), the P0.7I/O mouth is connected, and the output terminal of the operational amplifier OP07 (U36/U38/U40) of temperature signal regulation unit is through the AIN0.1 of resistance and C8051F020 single-chip microcomputer (U0), AIN0.2, the AIN0.3I/O mouth is connected.
The RS485 communication unit comprises low-power consumption transceiver MAX485, RS-232/RS-485 converter U38, three groups of high-speed photoelectric coupler 6N137.RE, the DE end of low-power consumption transceiver MAX485 (U41) connects after 6N137 is connected with the P3.0I/O mouth of C8051F020 single-chip microcomputer (U0), RO, DI end is connected with P0.0, the P0.1I/O mouth of C8051F020 single-chip microcomputer respectively, and A, B end is connected with industrial computer (U43) through RS-232/RS-485 converter (U42).Its dominant frequency of industrial computer (U43) is 3GHz, in save as 4G, hard disk 500G.
The coupling condenser of local discharge sensor unit and resistance joint insert the multi-channel gating switch 74VHC4051 (U4) of local discharge signal amplifying unit, the output terminal of local discharge signal amplifying unit high speed operation amplifier AD844 (U7) inserts the in-phase input end of the high speed operation amplifier AD844 (U8) of local discharge signal filter unit, the output terminal of local discharge signal filter unit low-pass filter (U10) inserts the data receiver of data collecting card (U18), the output terminal of trigger pip generating unit operational amplifier LM324 (U17) inserts the trigger end of data collecting card (U18), the positive pole of the direct current 48V power supply of three-phase reactor unit is connected with the series connection sample resistance of sample resistance network element, the output terminal of sample resistance network element operational amplifier OP07 (U23) inserts insulation resistance signal condition unit digital regulation resistance X9110 (U24), and the output terminal of insulation resistance signal condition unitary operation amplifier OP07 (U26) inserts the reverse input end of the operational amplifier OP07 (U27) of insulation resistance signal A/D converting unit.
Technique scheme of the present invention adopts modular system architecture, with the local discharge sensor unit, the local discharge signal amplifying unit, the local discharge signal filter unit, threephase potential transformer, the trigger pip generating unit, data collecting card, the three-phase reactor unit, the sample resistance network element, insulation resistance signal condition unit, insulation resistance signal A/D converting unit, the temperature sensor unit, the temperature signal regulation unit, association handles CPU element, RS-485 communication unit and industrial computer are integrated organic whole, solved the problem of existing main fan for mines with the timely on-line monitoring of high-tension motor state of insulation, by many characteristic quantities on-line monitoring, many characteristic quantities information fusion, the information extraction of many characteristic quantities, the realization of fault diagnosis and early warning technology, further improve the stability and the reliability of coalmine ventilation system, guaranteed the safe operation of Coal Production.The present invention is actual from the scene, adopts the non-intruding monitor means, and the application technology of maturation is combined with the physical condition of main fan for mines with high-tension motor, does not transform electric machine structure, has realized the high-tension motor many reference amounts on-line monitoring that insulate.The characteristic quantity of gathering high-tension motor has stator temperature, insulation resistance and shelf depreciation, and a plurality of features are monitored in single parameter monitoring different from the past, for the assessment of state of insulation provides abundant objectively foundation.Parameter informations such as demonstration and storage stator temperature, insulation resistance, maximum pd quantity, discharge rate, nominal discharge capacity by checking database, show the development trend of the parameter that respectively insulate on monitor.Each characteristic quantity information that industrial computer will be gathered is carried out information fusion, and diagnostic assessment insulation of Electric Motor situation has realized pre-failure warning.
Description of drawings
Fig. 1 is that monitoring device of the present invention is formed structural drawing;
Fig. 2 is the composition structural drawing of local discharge sensor of the present invention;
Fig. 3 is a local discharge signal amplifying unit circuit diagram of the present invention;
Fig. 4 is the circuit connection diagram of light-coupled isolation TPL127;
Fig. 5 is the circuit connection diagram that high speed photo coupling is isolated 6N137;
Fig. 6 is a local discharge signal filter unit circuit diagram of the present invention;
Fig. 7 is a trigger pip generating unit circuit diagram of the present invention;
Fig. 8 is three-phase reactor element circuit figure of the present invention;
Fig. 9 is sample resistance lattice network figure of the present invention;
Figure 10 is insulation resistance signal condition element circuit figure of the present invention;
Figure 11 is insulation resistance signal A/D conversion unit circuit figure of the present invention;
Figure 12 is a temperature signal regulation circuit diagram of the present invention;
Figure 13 is that association of the present invention handles the CPU element circuit diagram;
Figure 14 is a RS-485 communication unit circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the high-tension motor state monitoring apparatus is that collection local discharge sensor unit, local discharge signal amplifying unit, local discharge signal filter unit, threephase potential transformer, trigger pip generating unit, data collecting card, three-phase reactor unit, sample resistance network element, insulation resistance signal condition unit, insulation resistance signal A/D converting unit, temperature sensor unit, temperature signal regulation unit, association's processing CPU element, RS-485 communication unit and industrial computer are the high-tension motor insulation monitoring and warning device of one.
Partial discharge monitoring uses three coupling condensers of customization to pick up the local discharge signal of motor stator three-phase, designing gain conditioned circuit, bandpass filter, local discharge signal is nursed one's health suitable amplitude and frequency range, use high-speed data acquisition card to gather the high frequency partial discharge signal, realize high sampling rate and long-time sampling; The design synchronous signal generating circuit begins to gather at power supply signal rising edge trigger data acquisition card, to obtain discharge pulse phase place accurately.
As shown in Figure 2, the local discharge sensor unit is made up of three local discharge sensors (U1/U2/U3), and local discharge sensor is made of coupling condenser and resistance.Capacitor one end links to each other with high-voltage fence, an end resistance grounded, and capacitor and resistance joint insert the multi-channel gating switch (U4) of local discharge signal amplifying unit.The coupling condenser capacity is 80pF, 2.5 times of rated voltage 25kV motor rated voltage, and partial discharge quantity is less than 3pC under rated voltage; Resistance is got 50 Ω, and the current signal that is coupled is converted to voltage signal.
Shown in Figure 3, the local discharge signal amplifying unit comprises multi-channel gating switch 74VHC4051, digital regulation resistance X9110, two groups of high speed operation amplifier AD844, three groups of photoelectrical coupler TLP127 and four groups of high-speed photoelectric coupler 6N137.Be connected with the local discharge signal filter unit after multi-channel gating switch 74VHC4051 (U4), digital regulation resistance X9110 (U5), high speed operation amplifier AD844 (U6) and high speed operation amplifier AD844 (U7) cascade, multi-channel gating switch 74VHC4051 (U4) address end is handled CPU element through photoelectrical coupler TLP137 and association and is connected, and digital regulation resistance X9110 (U5) handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected.
As shown in Figure 4, the signal of CPU output draws processing on the process earlier, after triode drives 2 pins that amplify back input optocoupler TLP127, and the 4 pins access receiving circuit of TLP127; The optocoupler input side adopts different+5V power supply with outgoing side, to reach the effect of isolation.As shown in Figure 5, the signal of CPU output inserts 3 pins that high speed photo coupling is isolated 6N137 behind current-limiting resistance, and 6 pins of 6N137 insert receiving circuit after adding and drawing resistance.
As shown in Figure 6, the local discharge signal filter unit comprises two groups of high speed operation amplifier AD844 and LT6600IS8-20 low-pass filter.Insert the data receiver of data collecting card (U18) after high speed operation amplifier AD844 (U8), high speed operation amplifier AD844 (U9) and the cascade of LT6600IS8-20 (U10) low-pass filter.The former limit of threephase potential transformer (U11) links to each other with the three-phase high-voltage electrical network, and the three-phase secondary inserts the trigger pip generating unit.
As shown in Figure 7, the trigger pip generating unit comprises three groups of micro mutual inductor SPT204A, multi-channel gating switch 74VHC4051, operational amplifier LM358, operational amplifier LM324 and photoelectrical coupler TLP137.The input end of three groups of micro mutual inductor SPT204A (U12/U13/U14) links to each other with the three-phase secondary of threephase potential transformer respectively, output terminal inserts multi-channel gating switch 74VHC4051 (U15), insert the trigger end of data collecting card (U18) after multi-channel gating switch 74VHC4051 (U15), operational amplifier LM358 (U16), operational amplifier LM324 (U17) cascade, the address end of multi-channel gating switch 74VHC4051 (U15) is handled CPU element through photoelectrical coupler TLP127 and association and is connected.Data collecting card (U18) has two paths, and the highest real-time sampling rate of every paths is 65MS/s, and A/D resolution is 14, and expansion has the 512MB plate to carry SODIMM SDRAM storer, and data collecting card is connected with industrial computer (U43) by pci interface.
Additional direct current monitoring method is used in the monitoring of insulation resistance, utilizes the DC voltage of three-phase reactor general+48V to be added on generator stator winding insulation and the sample resistance series circuit, calculates the insulation resistance resistance according to the partial pressure value on the sample resistance.
As shown in Figure 8, the three-phase reactor unit comprises three-phase reactor, direct current 48V power supply, double T rejector circuit and series connection L type low-pass filter circuit.The former edge joint of three-phase reactor (U19) is gone into the three-phase alternating current high-voltage fence, forms a neutral point behind the secondary short circuit, and neutral point is through the negative pole of a series of resistance access direct current 48V power supplys, and the positive pole of direct current 48V power supply is connected with the sample resistance network element.Neutral point inserts the double T rejector circuit that is made up of resistance, electric capacity and links to each other with the earth with series connection L type low-pass filter circuit.
The effect of sample resistance network is to switch sample resistance according to the size of insulation resistance, change the electric resistance partial pressure value in the loop that 48V DC voltage, electrical machine insulation resistance and sample resistance constitute, and in conjunction with program control operational amplification circuit voltage division signal is adjusted to and satisfies accuracy requirement and to be suitable for the A/D conversion.As shown in Figure 9, the sample resistance network element comprises semifixed resistor, four groups of sample resistances, three groups of midget relay GSV-1, three groups of photoelectrical coupler TLP137 and operational amplifier OP07.Four groups of sample resistance series connection are after semifixed resistor inserts the earth, and the input end of operational amplifier OP07 (U23) is inserted at the two ends of series connection sample resistance, and the output terminal of OP07 (U23) inserts insulation resistance signal condition unit.The resistance of four groups of sample resistances is respectively 10M Ω, 1M Ω, 100k Ω and 10k Ω, resistance is that the sample resistance of 10M Ω, 1M Ω, 100k Ω is in parallel with three groups of midget relay G5V-1 (U20/U21/U22) respectively, and the control contact of midget relay G5V-1 (U20/U21/U22) is handled CPU element through photoelectrical coupler TLP127 and association and is connected.
The effect of insulation resistance signal condition unit is that the sample resistance voltage division signal is carried out processing and amplifying, and the analog quantity of being convenient to next step is isolated and the AD conversion.As shown in figure 10, insulation resistance signal condition unit comprises digital regulation resistance X9110, two groups of operational amplifier OP07, high-speed photoelectric coupler 6N137.Insert insulation resistance signal A/D converting unit after digital regulation resistance X9110 (U24), operational amplifier OP07 (U25) and operational amplifier OP07 (U26) cascade, digital regulation resistance X9110 (U24) handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected.
The A/D change-over circuit is converted to digital signal with the output signal of insulation resistance signal condition unit, and CPU selects signal, the enlargement factor of program control amplifier and the resistance that additional dc voltage value can calculate insulation resistance by this signal, divider resistance; For preventing on high-tension side interference, adopt photoelectrical coupler HCNR200 to realize analog Input Insulation Based.As shown in figure 11, insulation resistance signal A/D converting unit comprises photoelectrical coupler HCNR200, three groups of operational amplifier OP07 and A/D conversion ADS1110.Insert association after operational amplifier OP07 (U27), photoelectrical coupler HCNR200 (U28), operational amplifier OP07 (U29), operational amplifier OP07 (U30) and A/D converter ADS1110 (U31) cascade and handle CPU element.
The temperature sensor unit is made of 3 PT100 thermal resistances (U32/U33/U34), is installed in the stator winding output cut-in temperature signal condition unit.
As shown in figure 12, there are three road temperature signal regulation circuit temperature signal regulation unit, every road temperature signal regulation circuit comprise measuring bridge ,+15V direct supply, stabilivolt and two operational amplifier OP07.+ 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U35) through stabilivolt, the inverting input of operational amplifier OP07 (U35) is connected with the two ends of output terminal with PT100 thermal resistance (U32), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U36) input end, and the output terminal of operational amplifier OP07 (U36) is handled CPU element through resistance with association and is connected.The second road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U37) through stabilivolt, the inverting input of operational amplifier OP07 (U37) is connected with the two ends of output terminal with PT100 thermal resistance (U33), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U38) input end, and the output terminal of operational amplifier OP07 (U38) is handled CPU element through resistance with association and is connected.Third Road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 (U39) through stabilivolt, the inverting input of operational amplifier OP07 (U39) is connected with the two ends of output terminal with PT100 thermal resistance (U34), the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 (U40) input end, and the output terminal of operational amplifier OP07 (U40) is handled CPU element through resistance with association and is connected.
As shown in figure 13, association's processing CPU element comprises C8051F020 single-chip microcomputer, crystal oscillator, reset button, debugging interface.Crystal oscillator is connected with the crystal oscillator pin I/O mouth of C8051F020 single-chip microcomputer (U0), reset button is connected with the reset pin I/O mouth of C8051F020 single-chip microcomputer (U0), debugging interface is connected with the corresponding I/O mouth of C8051F020 single-chip microcomputer (U0), multi-channel gating switch 74VHC4051 (U4) the address end of local discharge signal amplifying unit through photoelectrical coupler TLP137 respectively with the P2.2 of C8051F020 single-chip microcomputer (U0), P2.3, the P2.4I/O mouth is connected, the digital regulation resistance X9110 (U5) of local discharge signal amplifying unit by the spi bus interface through high-speed photoelectric coupler 6N137 respectively with the P0.2 of C8051F020 single-chip microcomputer (U0), P0.3, P0.4, the P3.2I/O mouth is connected, multi-channel gating switch 74VHC4051 (U15) the address end of trigger pip generating unit through photoelectrical coupler TLP137 respectively with the P3.7 of C8051F020 single-chip microcomputer (U0), P2.0, the P2.1I/O mouth is connected, the control contact of three groups of midget relay G5V-1 (U20/U21/U22) of sample resistance network element through photoelectrical coupler TLP137 respectively with the P3.3 of C8051F020 single-chip microcomputer (U0), P3.4, the P3.5I/O mouth is connected, insulation resistance signal condition unit digital regulation resistance X9110 (U24) is by the P0.2 of spi bus interface through high-speed photoelectric coupler 6N137 and C8051F020 single-chip microcomputer (U0), P0.3, P0.4, the P3.1I/O mouth is connected, the SCL of insulation resistance signal A/D converting unit A/D converter ADS1110 (U31), the P0.6 of SDA end and C8051F020 single-chip microcomputer (U0), the P0.7I/O mouth is connected, and the output terminal of the operational amplifier OP07 (U36/U38/U40) of temperature signal regulation unit is through the AIN0.1 of resistance and C8051F020 single-chip microcomputer (U0), AIN0.2, the AIN0.3I/O mouth is connected.
As shown in figure 14, the RS485 communication unit comprises low-power consumption transceiver MAX485, RS-232/RS-485 converter U38, three groups of high-speed photoelectric coupler 6N137.RE, the DE end of low-power consumption transceiver MAX485 (U41) connects after 6N137 is connected with the P3.0I/O mouth of C8051F020 single-chip microcomputer (U0), RO, DI end is connected with P0.0, the P0.1I/O mouth of C8051F020 single-chip microcomputer respectively, and A, B end is connected with industrial computer (U43) through RS-232/RS-485 converter (U42).
Its dominant frequency of industrial computer (U43) is 3GHz, in save as 4G, hard disk 500G.
The coupling condenser of local discharge sensor unit and resistance joint insert the multi-channel gating switch 74VHC4051 (U4) of local discharge signal amplifying unit, the output terminal of local discharge signal amplifying unit high speed operation amplifier AD844 (U7) inserts the in-phase input end of the high speed operation amplifier AD844 (U8) of local discharge signal filter unit, the output terminal of local discharge signal filter unit low-pass filter (U10) inserts the data receiver of data collecting card (U18), the output terminal of trigger pip generating unit operational amplifier LM324 (U17) inserts the trigger end of data collecting card (U18), the positive pole of the direct current 48V power supply of three-phase reactor unit is connected with the series connection sample resistance of sample resistance network element, the output terminal of sample resistance network element operational amplifier OP07 (U23) inserts insulation resistance signal condition unit digital regulation resistance X9110 (U24), and the output terminal of insulation resistance signal condition unitary operation amplifier OP07 (U26) inserts the reverse input end of the operational amplifier OP07 (U27) of insulation resistance signal A/D converting unit.
A kind of hardware configuration that is used for mine main ventilator with high-tension motor insulation state monitoring device that the invention process is above-mentioned, those skilled in the art can obtain the combination of corresponding system software and software, and can realize the automated job of mine main ventilator with the operational management of high-tension motor state, improve the reliability of mine ventilation system.
Claims (1)
1. a main fan for mines is characterized in that comprising that with high-tension motor insulation state monitoring device local discharge sensor unit, local discharge signal amplifying unit, local discharge signal filter unit, threephase potential transformer, trigger pip generating unit, data collecting card, three-phase reactor unit, sample resistance network element, insulation resistance signal condition unit, insulation resistance signal A/D converting unit, temperature sensor unit, temperature signal regulation unit, association handle CPU element, RS-485 communication unit and industrial computer;
The local discharge sensor unit is made up of three local discharge sensors, local discharge sensor is made of coupling condenser and resistance, capacitor one end links to each other with high-voltage fence, an end resistance grounded, and capacitor and resistance joint insert the local discharge signal amplifying unit; The local discharge signal amplifying unit comprises multi-channel gating switch 74VHC4051, digital regulation resistance X9110, two groups of high speed operation amplifier AD844, three groups of photoelectrical coupler TLP127 and four groups of high-speed photoelectric coupler 6N137; Be connected with the local discharge signal filter unit after multi-channel gating switch 74VHC4051, digital regulation resistance X9110, high speed operation amplifier AD844 and the high speed operation amplifier AD844 cascade, multi-channel gating switch 74VHC4051 address end is handled CPU element through photoelectrical coupler TLP137 and association and is connected, and digital regulation resistance X9110 handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected; The local discharge signal filter unit comprises two groups of high speed operation amplifier AD844 and low-pass filter LT6600IS8-20; Insert the data receiver of data collecting card after high speed operation amplifier AD844, high speed operation amplifier AD844 and the low-pass filter LT6600IS8-20 cascade;
The former limit of threephase potential transformer links to each other with the three-phase high-voltage electrical network, and the three-phase secondary inserts the trigger pip generating unit; The trigger pip generating unit comprises three groups of micro mutual inductor SPT204A, multi-channel gating switch 74VHC4051, operational amplifier LM358, operational amplifier LM324 and photoelectrical coupler TLP137; The input end of three groups of micro mutual inductor SPT204A links to each other with the three-phase secondary of threephase potential transformer respectively, output terminal inserts multi-channel gating switch 74VHC4051, insert the trigger end of data collecting card after multi-channel gating switch 74VHC4051, operational amplifier LM358, the operational amplifier LM324 cascade, the address end of multi-channel gating switch 74VHC4051 is handled CPU element through photoelectrical coupler TLP127 and association and is connected; Data collecting card has two paths, and the highest real-time sampling rate of every paths is 65MS/s, and A/D resolution is 14, and expansion has the 512MB plate to carry SODIMM SDRAM storer, and data collecting card is connected with industrial computer by pci interface;
The three-phase reactor unit comprises three-phase reactor, direct current 48V power supply, double T rejector circuit and series connection L type low-pass filter circuit; The former edge joint of three-phase reactor is gone into the three-phase alternating current high-voltage fence, forms a neutral point behind the secondary short circuit, and neutral point is through the negative pole of a series of resistance access direct current 48V power supplys, and the positive pole of direct current 48V power supply is connected with the sample resistance network element; Neutral point inserts the double T rejector circuit that is made up of resistance, electric capacity and links to each other with the earth with series connection L type low-pass filter circuit; The sample resistance network element comprises semifixed resistor, four groups of sample resistances, three groups of midget relay G5V-1, three groups of photoelectrical coupler TLP137 and operational amplifier OP07; Four groups of sample resistance series connection are after semifixed resistor inserts the earth, and the input end of operational amplifier OP07 is inserted at the two ends of series connection sample resistance, and the output terminal of OP07 inserts insulation resistance signal condition unit; The resistance of four groups of sample resistances is respectively 10M Ω, 1M Ω, 100k Ω and 10k Ω, resistance is that the sample resistance of 10M Ω, 1M Ω, 100k Ω is in parallel with three groups of midget relay G5V-1 respectively, and the control contact of midget relay G5V-1 is handled CPU element through photoelectrical coupler TLP127 and association and is connected;
Insulation resistance signal condition unit comprises digital regulation resistance X9110, two groups of operational amplifier OP07, high-speed photoelectric coupler 6N137; Insert insulation resistance signal A/D converting unit after digital regulation resistance X9110, operational amplifier OP07 and the operational amplifier OP07 cascade, digital regulation resistance X9110 handles CPU element by the spi bus interface through high-speed photoelectric coupler 6N137 and association and is connected; Insulation resistance signal A/D converting unit comprises photoelectrical coupler HCNR200, three groups of operational amplifier OP07 and A/D conversion ADS1110; Insert association after operational amplifier OP07, photoelectrical coupler HCNR200, operational amplifier OP07, operational amplifier OP07 and the A/D converter ADS1110 cascade and handle CPU element;
The temperature sensor unit is made of 3 PT100 thermal resistances, is installed in the stator winding output cut-in temperature signal condition unit; There are three road temperature signal regulation circuit temperature signal regulation unit, first via temperature signal regulation circuit comprises measuring bridge, + 15V direct supply, stabilivolt and two operational amplifier OP07, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 through stabilivolt, the inverting input of operational amplifier OP07 is connected with the two ends of output terminal with the PT100 thermal resistance, the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 input end, and the output terminal of operational amplifier OP07 is handled CPU element through resistance with association and is connected; The second road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 through stabilivolt, the inverting input of operational amplifier OP07 is connected with the two ends of output terminal with the PT100 thermal resistance, the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 input end, and the output terminal of operational amplifier OP07 is handled CPU element through resistance with association and is connected; Third Road temperature signal regulation circuit is identical with the first via, + 15V direct supply inserts the in-phase input end of operational amplifier OP07 through stabilivolt, the inverting input of operational amplifier OP07 is connected with the two ends of output terminal with the PT100 thermal resistance, the PT100 thermal resistance inserts measuring bridge as a brachium pontis, the output of measuring bridge inserts operational amplifier OP07 input end, and the output terminal of operational amplifier OP07 is handled CPU element through resistance with association and is connected;
Association handles CPU element and comprises C8051F020 single-chip microcomputer, crystal oscillator, reset button, debugging interface; Crystal oscillator is connected with the crystal oscillator pin I/O mouth of C8051F020 single-chip microcomputer, and reset button is connected with the reset pin I/O mouth of C8051F020 single-chip microcomputer, and debugging interface is connected with the corresponding I/O mouth of C8051F020 single-chip microcomputer; The multi-channel gating switch 74VHC4051 address end of local discharge signal amplifying unit through photoelectrical coupler TLP137 respectively with the P2.2 of C8051F020 single-chip microcomputer, P2.3, the P2.4I/O mouth is connected, the digital regulation resistance X9110 of local discharge signal amplifying unit by the spi bus interface through high-speed photoelectric coupler 6N137 respectively with the P0.2 of C8051F020 single-chip microcomputer, P0.3, P0.4, the P3.2I/O mouth is connected, the multi-channel gating switch 74VHC4051 address end of trigger pip generating unit through photoelectrical coupler TLP137 respectively with the P3.7 of C8051F020 single-chip microcomputer, P2.0, the P2.1I/O mouth is connected, the control contact of three groups of midget relay G5V-1 of sample resistance network element through photoelectrical coupler TLP137 respectively with the P3.3 of C8051F020 single-chip microcomputer, P3.4, the P3.5I/O mouth is connected, insulation resistance signal condition unit digital regulation resistance X9110 is by the P0.2 of spi bus interface through high-speed photoelectric coupler 6N137 and C8051F020 single-chip microcomputer, P0.3, P0.4, the P3.1I/O mouth is connected, the SCL of insulation resistance signal A/D converting unit A/D converter ADS1110, the P0.6 of SDA end and C8051F020 single-chip microcomputer, the P0.7I/O mouth is connected, and the output terminal of the operational amplifier OP07 of temperature signal regulation unit is through the AIN0.1 of resistance and C8051F020 single-chip microcomputer, AIN0.2, the AIN0.3I/O mouth is connected;
The RS485 communication unit comprises low-power consumption transceiver MAX485, RS-232/RS-485 converter U38, three groups of high-speed photoelectric coupler 6N137; RE, the DE end of low-power consumption transceiver MAX485 connects after 6N137 is connected with the P3.0I/O mouth of C8051F020 single-chip microcomputer, RO, DI end is connected with P0.0, the P0.1I/O mouth of C8051F020 single-chip microcomputer respectively, and A, B end is connected with industrial computer through the RS-232/RS-485 converter; Its dominant frequency of industrial computer is 3GHz, in save as 4G, hard disk 500G.
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| CN104426391A (en) * | 2013-08-23 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | DC power source circuit |
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| CN107939446A (en) * | 2017-11-29 | 2018-04-20 | 合肥长江自动化工程有限公司 | A kind of Mine Ventilator centralized control system |
| CN108226617A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne 270V high voltage direct current state acquisition interface |
| CN109813373A (en) * | 2019-01-30 | 2019-05-28 | 济南大学 | A kind of detection circuit and detection method of built-in mining diving pump |
| CN110488187A (en) * | 2019-07-30 | 2019-11-22 | 南京南瑞继保工程技术有限公司 | AC excitation synchronous machinery excitation winding earth short trouble protects system and method |
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| CN108226617A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne 270V high voltage direct current state acquisition interface |
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| CN109813373A (en) * | 2019-01-30 | 2019-05-28 | 济南大学 | A kind of detection circuit and detection method of built-in mining diving pump |
| CN110488187A (en) * | 2019-07-30 | 2019-11-22 | 南京南瑞继保工程技术有限公司 | AC excitation synchronous machinery excitation winding earth short trouble protects system and method |
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