CN101447660B - Automatic reclosing controller of general low-voltage circuit breaker - Google Patents
Automatic reclosing controller of general low-voltage circuit breaker Download PDFInfo
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- CN101447660B CN101447660B CN2007101711763A CN200710171176A CN101447660B CN 101447660 B CN101447660 B CN 101447660B CN 2007101711763 A CN2007101711763 A CN 2007101711763A CN 200710171176 A CN200710171176 A CN 200710171176A CN 101447660 B CN101447660 B CN 101447660B
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Abstract
The invention relates to an automatic reclosing controller of a general low-voltage circuit breaker, comprising a signal input unit, a signal processing unit, a signal output unit and a power supply unit. The signal input unit is connected with the low-voltage circuit breaker; the signal processing unit is connected with the signal input unit and the signal output unit; the power supply unit is connected with the signal input unit and the signal processing unit. Compared with the prior art, the automatic reclosing controller of the general low-voltage circuit breaker has advantages of strong generality, high reliability, economy and practicality. With the automatic reclosing controller arranged additionally, the automatic reclosing controller is restored during the power supply, therefore, the power supply reliability is improved and the workload is reduced.
Description
Technical field
The present invention relates to circuit control, particularly relate to a kind of automatic reclosing controller of general low-voltage circuit breaker.
Background technology
In power supply-distribution system, a large amount of unattended low-voltage distribution cabinets are arranged, low-voltage circuit breaker tripping operation during decompression (under-voltage) has plenty of transient fault (for example thunderbolt) in the decompression tripping operation, also have plenty of higher level supply line and have a power failure.Must the wait personnel go to close a floodgate after the decompression tripping operation, cause interruption duration long, increased workload.
At present, minority has the product of automatic reclosing function, and just at specific switch, versatility is not strong.Especially, low-voltage circuit breaker output overload, so that during short circuit, can not differentiate definitely, automatic reclosing might cause fault to enlarge, and causes serious consequence.
Summary of the invention
Technical problem to be solved of the present invention is exactly that a kind of highly versatile, reliability height, economical and practical automatic reclosing controller of general low-voltage circuit breaker are provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions: automatic reclosing controller of general low-voltage circuit breaker comprises signal input unit, signal processing unit, signal output unit, power supply unit; Described signal input unit is connected with low-voltage circuit breaker, and described signal processing unit is connected with signal input unit, signal output unit, and described power supply unit is connected with signal input unit, signal processing unit;
Described signal input unit comprises:
The voltage change ratio detection module;
Include the divide-shut brake testing circuit of photoelectrical coupler GU1, resistance R 2, R3, LED 2;
Include the output power on/off testing circuit of photoelectrical coupler GU2, resistance R 4, R5, diode D1;
Include the time setting circuit of exclusion RP, toggle switch K1, K2, K3, K4;
The AIN pin of described voltage change ratio detection module, BIN pin, CIN pin, N pin are held mutually with the A of low-voltage circuit breaker respectively, B holds mutually, C holds mutually, N holds connection;
Light-emitting diode positive pole among the described photoelectrical coupler GU1 is connected with auxiliary contact F1 after resistance R 3, this contact is held mutually with the C of low-voltage circuit breaker and is connected, negative pole is connected with the N end of low-voltage circuit breaker, LED 2 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU1, the grounded emitter of the triode among the described photoelectrical coupler GU1, collector electrode connect the 5V power supply after resistance R 2;
Light-emitting diode positive pole among the described photoelectrical coupler GU2 is held mutually with the C of low-voltage circuit breaker after resistance R 4 and is connected, negative pole is connected with the N end of low-voltage circuit breaker, diode D1 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU2, the grounded emitter of the triode among the described photoelectrical coupler GU2, collector electrode connect the 5V power supply after resistance R 5;
Described exclusion RP one termination 5V power supply, the other end is connected with toggle switch K1, K2, K3, K4 respectively.
Described signal processing unit comprises:
Microprocessor IC3;
Include the electrify restoration circuit of capacitor C 1 and resistance R 1;
Include the master oscillator frequenc supply circuit of capacitor C 2, C3, crystal oscillator XT;
The pin 3,4,5 of described microprocessor IC3 is connected with ADO pin, BDO pin, the CDO pin of voltage change ratio detection module respectively, the collector electrode of the triode among pin 12 and the photoelectrical coupler GU1 is connected, the collector electrode of the triode among pin 14 and the photoelectrical coupler GU2 is connected, and pin 15,16 is connected with SDO pin, the SDI pin of voltage change ratio detection module respectively;
One end ground connection of described capacitor C 1, its other end is connected with an end of resistance R 1 and the pin 1 of microprocessor IC3, another termination 5V power supply of this resistance R 1;
One end of described capacitor C 2 is connected back ground connection with an end of capacitor C 3, the other end of capacitor C 2 is connected with 10 with the pin 9 of microprocessor IC3 respectively with the other end of capacitor C 3, meets crystal oscillator XT between this pin 9,10.
Described signal output unit comprises:
Include the energy storage action executing circuit of resistance R 6, triode Q2, relay J 2;
Include the reclosing action executing circuit of resistance R 7, triode Q1, relay J 1;
Include the actuation of an alarm executive circuit of resistance R 9, triode Q3, relay J 3;
Include the sound light alarming circuit of resistance R 8, R10, triode Q4, LED 1 and buzzer FM;
Described resistance R 6 is connected the back and is connected with the base stage of triode Q2 with the pin 17 of microprocessor IC3, the grounded emitter of described triode Q2, collector electrode with connect the 12V power supply after relay J 2 is connected; Described resistance R 7 is connected the back and is connected with the base stage of triode Q1 with the pin 18 of microprocessor IC3, the grounded emitter of described triode Q1, collector electrode with connect the 12V power supply after relay J 1 is connected; Described resistance R 9 is connected the back and is connected with the base stage of triode Q3 with the pin 21 of microprocessor IC3, the grounded emitter of described triode Q3, collector electrode with connect the 12V power supply after relay J 3 is connected; Described resistance R 10 is connected the back and is connected with the base stage of triode Q4 with the pin 22 of microprocessor IC3, the grounded emitter of described triode Q4, described resistance R 8 connects the 12V power supply after LED 1 back is connected with the collector electrode of triode Q4, and described buzzer FM is connected with the collector electrode of triode Q4 after connecing the 12V power supply.
Described power supply unit comprises K switch 0, piezo-resistance YM, transformer T0, bridge rectifier ZD0, capacitor C 4, C5, C6, C7, C8, C9, C10, inductance L 0, integrated regulator IC1, IC2, the two ends of the primary winding of described transformer T0 respectively with an end of K switch 0, the N end of low-voltage circuit breaker is connected, the other end of described K switch 0 is held mutually with the C of low-voltage circuit breaker and is connected, described piezo-resistance YM connects the two ends with primary winding, described transformer T0 and bridge rectifier ZD0, integrated regulator IC1, IC2 constitutes the stabilized voltage power supply of 5V and 12V, wherein be connected with capacitor C 4, C5, C6, C7, C8 is used for anti-interference and filtering; One end of described capacitor C 9 is connected the back and links to each other with the 5V power supply with an end of capacitor C 10, the other end of capacitor C 9 is connected the back and links to each other with the pin 20 of microprocessor IC3 and ground connection with the other end of capacitor C 10.
Described voltage change ratio detection module comprises input port, voltage transformation module, signal processing output unit, output port, and described input port, voltage transformation module, signal processing output unit and output port are linked in sequence; Three-phase voltage is given voltage transformation module through input port, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal processing output unit processing, after by the signal processing output unit signal being handled computing, the voltage change ratio signal is exported through output port.
When described low-voltage circuit breaker trips, the divide-shut brake testing circuit is notified trip signal the pin 12 of microprocessor IC3, microprocessor IC3 carries out the A/D conversion to three-phase voltage U A, UB, the UC that is input to pin 3,4,5 simultaneously, judge whether to take place under-voltage, no-voltage fault, if then microprocessor IC3 writes current failure memory EEPROM with the automatic reclosing instruction.
Compared with prior art, highly versatile of the present invention, reliability height, economical and practical, and after installing automatic reclosing controller additional, automatic reclosing when restoring electricity has improved power supply reliability, has reduced workload.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a workflow diagram of the present invention;
Fig. 3 is the structural representation of voltage change ratio detection module of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in Fig. 1～3, automatic reclosing controller of general low-voltage circuit breaker comprises signal input unit, signal processing unit, signal output unit, power supply unit; Described signal input unit is connected with low-voltage circuit breaker, and described signal processing unit is connected with signal input unit, signal output unit, and described power supply unit is connected with signal input unit, signal processing unit.
Described signal input unit comprises: the voltage change ratio detection module; Include the divide-shut brake testing circuit of photoelectrical coupler GU1, resistance R 2, R3, LED 2; Include the output power on/off testing circuit of photoelectrical coupler GU2, resistance R 4, R5, diode D1; Include the time setting circuit of exclusion RP, toggle switch K1, K2, K3, K4; The AIN pin of described voltage change ratio detection module, BIN pin, CIN pin, N pin are held mutually with the A of low-voltage circuit breaker respectively, B holds mutually, C holds mutually, N holds connection; Light-emitting diode positive pole among the described photoelectrical coupler GU1 is connected with auxiliary contact F1 after resistance R 3, this contact is held mutually with C and is connected, negative pole is connected with the N end, LED 2 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU1, the grounded emitter of the triode among the described photoelectrical coupler GU1, collector electrode connect the 5V power supply after resistance R 2; Light-emitting diode positive pole among the described photoelectrical coupler GU2 is held mutually with C after resistance R 4 and is connected, negative pole is connected with the N end, diode D1 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU2, the grounded emitter of the triode among the described photoelectrical coupler GU2, collector electrode connect the 5V power supply after resistance R 5; Described exclusion RP one termination 5V power supply, the other end is connected with toggle switch K1, K2, K3, K4 respectively; Described signal processing unit comprises:
Microprocessor IC3;
Include the electrify restoration circuit of capacitor C 1 and resistance R 1;
Include the master oscillator frequenc supply circuit of capacitor C 2, C3, crystal oscillator XT;
The pin 3,4,5 of described microprocessor IC3 is connected with ADO pin, BDO pin, the CDO pin of voltage change ratio detection module respectively, the collector electrode of the triode among pin 12 and the photoelectrical coupler GU1 is connected, the collector electrode of the triode among pin 14 and the photoelectrical coupler GU2 is connected, and pin 15,16 SDO pin, the SDI pin of voltage change ratio detection module respectively is connected; Be connected another termination 5V power supply of this resistance R 1 after described capacitor C 1 ground connection with an end of resistance R 1 and the pin 1 of microprocessor IC3; Be connected with the pin 9,10 of microprocessor IC3 after described capacitor C 2, the C3 ground connection, meet crystal oscillator XT between this pin 9,10.
Described signal output unit comprises:
Include the energy storage action executing circuit of resistance R 6, triode Q2, relay J 2;
Include the reclosing action executing circuit of resistance R 7, triode Q1, relay J 1;
Include the actuation of an alarm executive circuit of resistance R 9, triode Q3, relay J 3;
Include the sound light alarming circuit of resistance R 8, R10, triode Q4, LED 1 and buzzer FM; Described resistance R 6 is connected the back and is connected with the base stage of triode Q2 with the pin 17 of microprocessor (IC3), the grounded emitter of described triode Q2, collector electrode with connect the 12V power supply after relay J 2 is connected; Described resistance R 7 is connected the back and is connected with the base stage of triode Q1 with the pin 18 of microprocessor IC3, the grounded emitter of described triode Q1, collector electrode with connect the 12V power supply after relay J 1 is connected; Described resistance R 9 is connected the back and is connected with the base stage of triode Q3 with the pin 21 of microprocessor IC3, the grounded emitter of described triode Q3, collector electrode with connect the 12V power supply after relay J 3 is connected; Described resistance R 10 is connected the back and is connected with the base stage of triode Q4 with the pin 22 of microprocessor IC3, the grounded emitter of described triode Q4, described resistance R 8 connects the 12V power supply after LED 1 back is connected with the collector electrode of triode Q4, and described buzzer FM is connected with the collector electrode of triode Q4 after connecing the 12V power supply; Described power supply unit comprises K switch 0, piezo-resistance YM, transformer T0, bridge rectifier ZDO, capacitor C 4, C5, C6, C7, C8, C9, C10, inductance L 0, integrated regulator IC1, IC2, the two ends of the primary winding of described transformer T0 respectively with an end of K switch 0, the N end of low-voltage circuit breaker is connected, the other end of described K switch 0 is held mutually with the C of low-voltage circuit breaker and is connected, described piezo-resistance YM connects the two ends with primary winding, described transformer T0 and bridge rectifier ZDO, integrated regulator IC1, IC2 constitutes the stabilized voltage power supply of 5V and 12V, wherein be connected with capacitor C 4, C5, C6, C7, C8 is used for anti-interference and filtering; The end of described capacitor C 9, C10 is connected the back and is connected the pin 19 equal ground connection of the other end of capacitor C 9, C10 and microprocessor IC3 with the pin 20 of microprocessor IC3 with the 5V power supply; Described voltage change ratio detection module comprises input port, voltage transformation module, signal processing output unit, output port, and described input port, voltage transformation module, signal processing output unit and output port interconnect; Three-phase voltage is given voltage transformation module through input port, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal processing output unit processing, after by the signal processing output unit signal being handled computing, the voltage change ratio signal is exported through output port; When described low-voltage circuit breaker trips, the divide-shut brake testing circuit is notified trip signal the pin 12 of microprocessor IC3, microprocessor IC3 carries out the A/D conversion to three-phase voltage U A, UB, the UC that is input to pin 3,4,5 simultaneously, judge whether to take place under-voltage, no-voltage fault, if then microprocessor IC3 writes current failure memory EEPROM with the automatic reclosing instruction.
1. stimulus part is made up of four parts:
A) CFU voltage change ratio detection module.Three-phase voltage in this module input industrial electrical network, three direct voltage UA that output is corresponding, UB, UC, simultaneously, by serial port SDI, SDO output three-phase voltage rate of change d (ua)/dt, d (ub)/dt, d (uc)/dt, digital signal, supply with signal processing chip IC3.
B) divide-shut brake testing circuit.By photoelectrical coupler GU1 and resistance R 2, R3; LED 2 constitutes.
When the low-voltage circuit breaker separating brake, its auxiliary contact F1 energized, R3 limits electric current, makes the GU1 conducting, and LED2 is luminous, the CO end output low level of GU1.When low-voltage circuit breaker closes a floodgate, its auxiliary contact F 1 disjunction power supply, GU1 ends, and LED2 extinguishes, and draws high level on the R2, the CO end output high level of GU1.Supply with signal processing chip IC3.
C) output power on/off testing circuit.By photoelectrical coupler GU2 and resistance R 4, R5; Diode D1 constitutes.
When low-voltage circuit breaker closed a floodgate, its output had electricity, and R4 limits electric current, makes the GU2 conducting, the CO end output low level of GU2.When the low-voltage circuit breaker separating brake, its output dead electricity, GU2 ends, and draws high level on the R5, the CO end output high level of GU2.Supply with signal processing chip IC3.
D) time setting circuit.By exclusion RP and toggle switch K1, K2, K3, K4 constitutes.
K1, K2, K3, the K4 diverse location is represented the setting of different delayed time time.Draw high level on the exclusion RP.
2. signal processing is made up of microprocessor IC3, resistance R 1, capacitor C 1, C2, C3 and crystal oscillator XT.
XT, C2, C3 supply with the IC3 master oscillator frequenc.Capacitor C 1, resistance R 1 are electrify restoration circuit.
IC3 is high-performance, CMOS chip microprocessor, has to strengthen the kernel framework, and its operating frequency reaches 40MHz, has instruction set, the hardware multiplier of 16 bit wides, integrated 10 (A/D) analog to digital converters.And the EEPROM of current failure memory arranged.
3. output: resistance R 6, triode Q2, relay J 2, carry out the energy storage action.Resistance R 7, triode Q1, relay J 1 are carried out the reclosing action.Resistance R 9, triode Q3, relay J 3 are carried out actuation of an alarm.Resistance R 8, R10, triode Q4, LED 1, buzzer FM sends sound and light alarm.
4. power unit is made up of transformer T0, bridge rectifier ZD0, integrated regulator IC1, IC2, piezo-resistance YM, capacitor C 4～C10 and inductance L 0.
YM is a voltage protection device, and the protection power supply is not subjected to the damage of ultra-voltage.T0, ZD0 and IC1, IC2 constitute 12V and 5V stabilized voltage power supply, use for this controller.C5 strobes, and all the other electric capacity and inductance play anti-interference effect.
As Fig. 2, the course of work of the present invention is as follows:
1) reclosing controller initialization;
2) whether divide-shut brake testing circuit detection low-voltage circuit breaker is in gate-dividing state, if then execution in step 3); If not, execution in step 7 then);
3) microprocessor (IC3) reading command from its current failure memory EEPROM:
4) if reclosing command of whether attaching most importance to is execution in step 5 then); If not, then carry out block action, and execution in step 15);
5) whether three-phase voltage U A, UB, the UC of the output of microprocessor (IC3) detection voltage change ratio detection module be normal, if then execution in step 6); If not, continue execution in step 5);
6) microprocessor (IC3) instruction reclosing action executing circuit is carried out the reclosing action;
Whether 7) microprocessor (IC3) detects the three-phase voltage rate of change that its pin (15), (16) receive unusual, if then execution in step 8); If not, execution in step 9 then);
8) the Write fault sign is in current failure memory EEPROM, and execution in step 10);
9) sign among the removing current failure memory EEPROM, and execution in step 10);
10) whether divide-shut brake testing circuit detection circuit breaker is in gate-dividing state, if then execution in step 11); If not, then return step 2);
11) detect among the current failure memory EEPROM whether Reflector is arranged, if then execution in step 12); If not, execution in step 13 then);
12) write blocking order in current failure memory EEPROM, execution in step 16);
13) detect three-phase voltage and whether be lower than normal voltage, if then execution in step 14); If not, execution in step 12 then);
14) write reclosing and instruct among the current failure memory EEPROM, return step 2);
15) whether divide-shut brake testing circuit detection circuit breaker is in "on" position, if then execution in step 16), if not, continue execution in step 15);
16) step 7) is returned in the blocking order among the removing current failure memory EEPROM.
When the low-voltage circuit breaker tripping operation, the divide-shut brake testing circuit is notified microprocessor IC3_RC1 mouth with trip signal, simultaneously, IC3 is to being input to the three-phase voltage U A of RA1, RA2, RA3 mouth, UB, UC carry out the A/D conversion, judge whether to take place under-voltage, no-voltage fault, if under-voltage, no-voltage fault has taken place, IC3 writes current failure memory EEPROM with the instruction of automatic reclosing.
If under-voltage, no-voltage fault does not take place, IC3 will judge that before tripping operation moment is input to three-phase voltage rate of change d (the ua)/dt of IC3_SDI, SDO mouth, d (ub)/dt, and whether whether d (uc)/dt is unusual, be negative sense and greater than certain set point long enough time.The circuit breaker output voltage declines to a great extent and means overload, and even the generation of short circuit; Therefore, unusual if voltage change ratio occurs, be defined as the fault that overload, short circuit appear in the circuit breaker load, will forbid that the blocking order of automatic reclosing writes memory EEPROM this moment.If voltage change ratio does not occur unusually, and three-phase voltage U A, UB, UC is normal, and the reason of circuit breaker trip is the manual operation separating brake so, and IC3 will forbid that the blocking order of automatic reclosing writes EEPROM.
If the electrical network three-phase voltage is under-voltage, decompression causes circuit breaker trip, after three-phase voltage recovers normally, the instruction of the automatic reclosing of IC3 reading and saving in EEPROM, and judge UA, UB, UC is all greater than 85% o'clock of rated voltage, by the time trigger of setting, in the time-delay process, the IC3_RB1 mouth is sent high level, through R8, R10, Q4, driving LED 1, FM sends sound and light alarm.In the time-delay process, three-phase voltage should be always normal voltage, otherwise IC3 will stop timing, normally restarts time-delay again up to voltage; When time-delay finished, IC3 sent reclosing command, and the RC6 mouth is sent high level, drove relay J 1 through R7, Q1, carried out feed motion.By output power on/off testing circuit, IC3_RC3 mouth input low level determines that circuit breaker closes a floodgate, sends to stop reclosing command again.If unsuccessful reclosing, circuit breaker fail to close a floodgate by expection, IC3 will send the instruction of secondary time-delay, reclosing.If the secondary unsuccessful reclosing, IC3 sends alarm command, and the RB0 mouth is sent high level, drives relay J 3 through R10, Q3, carries out actuation of an alarm.
The circuit breaker that energy pre-storage is arranged does not have energy pre-storage not close a floodgate.The IC3_RC5 mouth is carried out the energy storage action through resistance R 6, triode Q2, relay J 2.Guarantee that circuit breaker reliably closes a floodgate.
As shown in Figure 3, voltage change ratio detector comprises input port, voltage transformation module, signal processing output unit, output port, and described input port, voltage transformation module, signal processing output unit and output port interconnect; Three-phase voltage is given voltage transformation module through input port in the industrial electrical network, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal processing output unit processing, after by the signal processing output unit signal being handled computing, the voltage change ratio signal is exported through output port.
Described input port comprises three-phase voltage input AIN, BIN, CIN and zero line side N; Described voltage transformation module comprises voltage protection device YA, YB, YC and voltage changer T, and described voltage changer T comprises the magnetic core of ring-type, is wound with three groups of coils on this magnetic core, and every group of coil is made of primary winding and secondary coil respectively; Described signal processing output unit comprises that 16 digital signal controller, electrify restoration circuit, master oscillator frequenc provide circuit, operating state indicating circuit; Described electrify restoration circuit, master oscillator frequenc provide circuit all to be connected with digital signal controller with the operating state indicating circuit; Described output port comprises aanalogvoltage output port ADO, BDO, CDO, digital signal serial output terminal mouth SDI, the SDO of three-phase voltage rate of change, and PORT COM TX, RX; Described three-phase voltage input AIN is connected with the end of voltage protection device YA and the end of primary winding TA1, the other end of the other end of voltage protection device YA and primary winding TA1 all is connected with zero line side N, end with the TA2 of coil groups is connected its other end ground connection with the pin 2 of digital signal controller; Described three-phase voltage input BIN is connected with the end of voltage protection device YB and the end of primary winding TB1, the other end of the other end of voltage protection device YB and primary winding TB1 all is connected with zero line side N, end with the TB2 of coil groups is connected its other end ground connection with pin 3 ends of digital signal controller; Three-phase voltage input CIN is connected with the end of voltage protection device YC and the end of primary winding TC1, the other end of the other end of voltage protection device YC and primary winding TC1 all is connected with zero line side N, end with the TC2 of coil groups is connected its other end ground connection with pin 4 ends of digital signal controller; The pin 5 of described digital signal controller and pin 24 equal ground connection, pin 17, pin 25 is connected with+5V voltage end, pin 16 is connected with-5V voltage end, pin 23 successively with resistance R 3, R4 series connection back is connected with aanalogvoltage output port ADO, resistance R 4 two ends are connected with capacitor C 4 respectively, C5, capacitor C 4, C5 all is connected with-5V voltage end, pin 21 successively with resistance R 5, R6 series connection back is connected with aanalogvoltage output port BDO, resistance R 6 two ends are connected with capacitor C 6 respectively, C7, capacitor C 6, C7 all is connected with-5V voltage end, pin 19 successively with resistance R 7, R8 series connection back is connected with aanalogvoltage output port CDO, resistance R 8 two ends are connected with capacitor C 8 respectively, C9, capacitor C 8, C9 all is connected with-5V voltage end, pin 14,15 respectively with port SDI, SDO connects, pin 8,9 respectively with PORT COM TX, RX connects; Described electrify restoration circuit comprises capacitor C 1, resistance R 1, and an end of capacitor C 1 and resistance R 1 all is connected with the 5V voltage source, the other end ground connection of capacitor C 1, and the other end of resistance R 1 is connected with the pin of digital signal controller 26; Described master oscillator frequenc provides circuit to comprise capacitor C 2, C2, crystal oscillator XT, the equal ground connection of an end of capacitor C 2, C2, and its other end connects respectively at the pin 6,7 of digital signal controller, is connected with crystal oscillator XT between this pin 6,7; Described operating state indicating circuit comprises resistance R 2, LED light, and an end of resistance R 2 is connected with the pin 11 of digital signal controller, and its other end is connected back ground connection with LED light; Described voltage protection device adopts piezo-resistance; Described magnetic core adopts the ultracrystallite material, and magnetic core adopts epoxy encapsulation.
Wherein:
1. voltage transformation part is by YA, YB, and YC and T form.YA, YB, YC is a voltage protection device, protects this module not to be subjected to the damage of ultra-voltage.T is the converter that specialized designs is made, and three-phase voltage scaling transformation in the industrial electrical network is become can be for the low voltage signal of chip processing.
The magnetic core of converter T adopts the ultracrystallite material to make.Ultracrystallite material converter has unique superiority:
A) low-down iron loss, very high saturation flux density, sufficiently high magnetic permeability.
B) working temperature height, in-40 ℃～+ 120 ℃ scopes, characteristic does not vary with temperature.
C) magnetic core has higher mechanical strength by epoxy encapsulation.
The coil parameter of converter T is through optimal design.Primary winding has the good insulation performance performance, best current density, the less volume that takies; Primary winding and secondary coil have good coupling.
Guaranteed like this variation of ambient temperature and voltage significantly, when sharply changing output signal undistorted, do not have and lag behind.
2. signal operation, processing and output, by IC, C1～C9, R1～R8, XT and LED form.Wherein IC is 16 position digital signal controllers (DSC), and the analog signal of input is carried out the A/D conversion, rate of change du/dt computing and conversion output.Its way of output has three kinds:
A) by SDI, SDO mouth other device is exported in the digital signal serial of rate of change du/dt.
B) carry out communication by TX, RX mouth and miscellaneous equipment.
C) through D/A conversion output analog voltage signal.
IC has 12 A/D transfer capabilities, and its resolution is 1/4096; Minimum 50ns operation time, 16 bit digital disposal abilities, the high-order digit filter has guaranteed sufficiently high precision.IC has abundant EEPROM, even have a power failure, data still can be preserved.
Wherein the discrete values differential based on Taylor series is adopted in rate of change du/dt computing.
High-accuracy voltage rate of change detection module is packaged into an integral device, and pin is a standard 2.54mm pin distance, so that use.
Claims (5)
1. automatic reclosing controller of general low-voltage circuit breaker comprises signal input unit, signal processing unit, signal output unit, power supply unit; Described signal input unit is connected with low-voltage circuit breaker, and described signal processing unit is connected with signal input unit, signal output unit, and described power supply unit is connected with signal input unit, signal processing unit;
It is characterized in that described signal input unit comprises:
The voltage change ratio detection module;
Include the divide-shut brake testing circuit of photoelectrical coupler GU1, resistance R 2, R3, LED 2;
Include the output power on/off testing circuit of photoelectrical coupler GU2, resistance R 4, R5, diode D1;
Include the time setting circuit of exclusion RP, toggle switch K1, K2, K3, K4;
The AIN pin of described voltage change ratio detection module, BIN pin, CIN pin, N pin are held mutually with the A of low-voltage circuit breaker respectively, B holds mutually, C holds mutually, N holds connection;
Light-emitting diode positive pole among the described photoelectrical coupler GU1 is connected with auxiliary contact F1 after resistance R 3, this contact is held mutually with the C of low-voltage circuit breaker and is connected, negative pole is connected with the N end of low-voltage circuit breaker, LED 2 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU1, the grounded emitter of the triode among the described photoelectrical coupler GU1, collector electrode connect the 5V power supply after resistance R 2;
Light-emitting diode positive pole among the described photoelectrical coupler GU2 is held mutually with the C of low-voltage circuit breaker after resistance R 4 and is connected, negative pole is connected with the N end of low-voltage circuit breaker, diode D1 is connected between the both positive and negative polarity of the light-emitting diode among the photoelectrical coupler GU2, the grounded emitter of the triode among the described photoelectrical coupler GU2, collector electrode connect the 5V power supply after resistance R 5;
Described exclusion RP one termination 5V power supply, the other end is connected with toggle switch K1, K2, K3, K4 respectively.
2. automatic reclosing controller of general low-voltage circuit breaker according to claim 1 is characterized in that, described signal processing unit comprises:
Microprocessor IC3;
Include the electrify restoration circuit of capacitor C 1 and resistance R 1;
Include the master oscillator frequenc supply circuit of capacitor C 2, C3, crystal oscillator XT.
3. automatic reclosing controller of general low-voltage circuit breaker according to claim 1 is characterized in that, described signal output unit comprises:
Include the energy storage action executing circuit of resistance R 6, triode Q2, relay J 2;
Include the reclosing action executing circuit of resistance R 7, triode Q1, relay J 1;
Include the actuation of an alarm executive circuit of resistance R 9, triode Q3, relay J 3;
Include the sound light alarming circuit of resistance R 8, R10, triode Q4, LED 1 and buzzer FM.
4. automatic reclosing controller of general low-voltage circuit breaker according to claim 1, it is characterized in that described power supply unit comprises K switch 0, piezo-resistance YM, transformer T0, bridge rectifier ZD0, capacitor C 4, C5, C6, C7, C8, C9, C10, inductance L 0, integrated regulator IC1, IC2.
5. automatic reclosing controller of general low-voltage circuit breaker according to claim 1, it is characterized in that, described voltage change ratio detection module comprises input port, voltage transformation module, signal processing output unit, output port, and described input port, voltage transformation module, signal processing output unit and output port are linked in sequence; Three-phase voltage is given voltage transformation module through input port, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal processing output unit processing, after by the signal processing output unit signal being handled computing, the voltage change ratio signal is exported through output port.
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| CN2007101711763A CN101447660B (en) | 2007-11-28 | 2007-11-28 | Automatic reclosing controller of general low-voltage circuit breaker |
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| CN2007101711763A CN101447660B (en) | 2007-11-28 | 2007-11-28 | Automatic reclosing controller of general low-voltage circuit breaker |
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| CN101447660B true CN101447660B (en) | 2010-12-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102394492A (en) * | 2011-09-29 | 2012-03-28 | 安徽鑫龙电器股份有限公司 | Circuit breaker closing protection device and closing protection method |
| CN103424639B (en) * | 2012-05-17 | 2016-05-18 | 苏州新宏博智能科技股份有限公司 | The automatic Verification method of automatic reclosing brake system |
| CN103066550B (en) * | 2012-12-21 | 2016-04-27 | 国网山东省电力公司淄博供电公司 | Low voltage switch decompression reclosure control power transmission detection method and device |
| CN103560479B (en) * | 2013-11-14 | 2016-08-17 | 温州市中基电子有限公司 | A kind of loaded line failure detector circuit being applied to chopper reclosing and method |
| CN105116716A (en) * | 2015-10-10 | 2015-12-02 | 国网浙江临海市供电公司 | Reclosing control system |
| CN109638661A (en) * | 2018-11-02 | 2019-04-16 | 国网浙江省电力有限公司温州供电公司 | A kind of power distribution network intelligent operation equipment |
| CN111934278B (en) * | 2020-08-07 | 2021-06-29 | 苏州展虹英梦智能科技有限公司 | Electric power monitoring cloud platform alarm device |
| CN112185778A (en) * | 2020-10-28 | 2021-01-05 | 国网甘肃省电力公司兰州供电公司 | Automatic reclosing device of air circuit breaker with self-healing function |
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