CN105676035A - Surge protection device health monitor - Google Patents
Surge protection device health monitor Download PDFInfo
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- CN105676035A CN105676035A CN201610124830.4A CN201610124830A CN105676035A CN 105676035 A CN105676035 A CN 105676035A CN 201610124830 A CN201610124830 A CN 201610124830A CN 105676035 A CN105676035 A CN 105676035A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention relates to a surge protection device health monitor. An object of the invention is to provide a surge protection device health monitoring device with high safety, multiple kinds of monitoring signals, and accurate monitoring signals. The surge protection device health monitor includes a power supply unit, a signal processing unit, a photovoltaic conversion unit, and a plurality of monitoring units. Monitoring signal receiving terminals of the monitoring units are connected to an interface input unit. A power supply terminal of the power supply unit is connected to a power supply grid through the interface input unit. Monitoring signal output terminals of the monitoring units are connected to a monitoring signal receiving terminal of the signal processing unit. A monitoring signal output terminal of the signal processing unit is connected to a signal receiving terminal of the photovoltaic conversion unit. A signal output terminal of the photovoltaic conversion unit is connected to an interface output unit. A power supplying terminal of the power supply unit is connected to power supply terminals of the signal processing unit and the photovoltaic conversion unit.
Description
Technical field
The present invention relates to a kind of lightning protection field, particularly relate to a kind of surge protector health monitor.
Background technology
Surge protector status monitoring mode mainly contains two kinds both at home and abroad at present: one is, in surge protector structure, state is setMonitoring mechanical contact, when surge protector lost efficacy after, mechanical contact disconnect dead electricity, by configuration external instrument to collect to signal;Another kind is a sensor coil to be installed on surge protector earth connection in order to monitor surge protector leakage current value, by electric leakageFlow valuve is judged surge protector state. But there is again defect and deficiency separately in these two kinds of monitoring modes:
When mechanical contact mode only has surge protector to damage, just can send signal, status monitoring is single, can not be to surge protectionDevice health status is carried out dynamic monitoring, and must be used in conjunction with signals collecting instrument, and acquisition instrument is expensive, Acquisition InstrumentTable is absorbed by surge protector easily lightning current while connection with the healthy mechanical contact of surge protector burns out, and this is that healthy machinery touchesA very large defect of point, producing this defect main cause is not form an independently surge protector health monitoring unit,Lack processing of circuit effectively.
Ground wire approach sensor can only be monitored voltage-limiting surge protector leakage current, to switching mode, combined surge protectionDevice is all inapplicable, its purposes limitation, easily disturbed by other signal, the shortcoming such as rate of false alarm is large, cause this shortcoming reason be bySensor technology is simply transplanted on surge protector status monitoring, has technological deficiency.
And the monitoring field of existing surge protector, monitor signal is single, and most of monitoring equipment is only at surge protectionThe device Shi Caineng that breaks down monitors, and monitor signal reliability is low. At the disclosed a kind of on-line monitoring electricity of CN203117262UGush in the device of protecting leakage current a kind of device that surge protector is carried out to leakage current monitoring is provided, this monitoring device is to electricityThe monitoring of surge protector is mainly for leakage current, and this device of other aspects that affects surge protector do not monitor, at electricityIn the situation that surge protector breaks down, this device probably cannot provide monitoring information accurately, incurs loss through delay the dimension to surge protectorThe time of protecting and rushing to repair.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of safe, monitor signal kind is many, monitor signal surge accuratelyProtector health monitor.
Surge protector health monitor of the present invention, wherein, comprise power supply unit, signal processing unit, photoelectric conversion unit andMultiple monitoring means, multiple monitoring means comprise again phase shortage monitoring means, alternate uneven monitoring means, misphase monitoring means,Leakage current monitoring unit and lightning current monitoring means, phase shortage monitoring means, alternate uneven monitoring means, misphase monitoring means,The monitor signal receiving terminal of leakage current monitoring unit and lightning current monitoring means is connected with interface input block, the power supply of power supply unitEnd is connected with power supply grid by interface input block, phase shortage monitoring means, alternate uneven monitoring means, misphase monitoring means,The monitor signal output of leakage current monitoring unit and lightning current monitoring means respectively with the monitor signal receiving terminal of signal processing unitConnect, the monitor signal output of signal processing unit is connected with the signal receiving end of photoelectric conversion unit, photoelectric conversion unitSignal output part is connected with interface output unit, and the feeder ear of power supply unit is respectively with signal processing unit and photoelectric conversion unitPower end connects.
Surge protector health monitor of the present invention, wherein said multiple monitoring means also comprise malfunction monitoring unit and temperature monitoringUnit, the monitor signal receiving terminal of malfunction monitoring unit and temperature monitoring unit is connected with interface input block, malfunction monitoring unitBe connected with the monitor signal output of temperature monitoring unit and the monitor signal receiving terminal of signal processing unit.
Surge protector health monitor of the present invention, what wherein said malfunction monitoring unit adopted is that model is JQC-3FF-S-HElectromagnetic relay; What temperature monitoring unit adopted is that model is the thermistor of PTC100 and the protection of heat that model is KSD201Device.
Surge protector health monitor of the present invention, wherein said phase shortage monitoring means, alternate uneven monitoring means and misphase prisonMeasurement unit comprises control chip and multiple diode, be connected to the first phase line of surge protector, the second phase line, third phase line andOn the neutral conductor, draw respectively the first wire, the second wire, privates and privates, the first wire, the second wire and the 3rdThe other end of wire accesses between the first diode and the 3rd diode, and the negative pole of the positive pole of the first diode and the 3rd diode connectsConnect, the other end of privates accesses between the second diode and the 4th diode, the positive pole of the second diode and the 4th diodeNegative pole connect, the negative pole of the first diode is connected with the negative pole of the second diode, the positive pole of the 3rd diode and the 4th diodePositive pole connect, draw respectively at the negative pole of the second diode and the anodal two ends of the 4th diode the 6th wire parallel with one another andThe 7th wire, is provided with the 5th diode on the 7th wire, the negative pole of the 5th diode is connected with the negative pole of the second diode, theThe positive pole of five diodes is connected with the positive pole of the 4th diode, on the 6th wire, is provided with control chip, on control chip, is provided withState output end.
Surge protector health monitor of the present invention, is in series with the first capacitor and the 4th capacitor on wherein said the first wire,On the second wire, be in series with the second capacitor and the 5th capacitor, on privates, be in series with electric three capacitors and the 6th capacitor,Draw the 5th wire in parallel at the negative pole of the second diode and the anodal two ends of the 4th diode, on the 5th wire, be provided with the 7thCapacitor.
Surge protector health monitor of the present invention, wherein said leakage current monitoring unit comprise voltage detecting circuit, integrating circuit,Voltage comparator circuit and electrical to optical converter, first input end and the second input-be connected voltage detecting circuit with voltage detecting circuitSignal output part be connected with the signal receiving end of integrating circuit, the signal receiving end of integrating circuit by sample resistance with default defeatedEnter end and connect, the signal output part of integrating circuit is connected with the signal receiving end of electrical to optical converter, and the signal of voltage detecting circuit is defeatedGo out end and be connected with the signal receiving end of voltage comparator circuit, the signal output part of voltage comparator circuit and the signal of electronic switch receiveEnd connects, and the control signal output of electronic switch is connected with the control end of electrical to optical converter.
Surge protector health monitor of the present invention, wherein said lightning current monitoring means comprise Luo-coil, A/D converter,Alarm device and the second microprocessor, the signal output part of Luo-coil is connected with the signal receiving end of A/D converter, A/D conversionThe signal output part of device is connected with the signal receiving end of the second microprocessor, the storage end of the second microprocessor and the first read-only storageDevice connects, and the data output end of the second microprocessor is connected with display unit, control signal output and the announcement of the second microprocessorThe control end of alert device connects.
Surge protector health monitor of the present invention, wherein said power supply unit comprise DC converter, current sense comparator,PWM modulator, multiple current rectifying and wave filtering circuit and multiple current sampling device, the current input terminal of the first current rectifying and wave filtering circuit passes throughLine filter access power supply grid, the current output terminal of the first current rectifying and wave filtering circuit is connected with the current input terminal of DC converter,The current output terminal of DC converter is connected with the current input terminal of the second current rectifying and wave filtering circuit, the current input terminal of DC converterWith the current output terminal of DC converter also respectively with the current input terminal of the first current sampling device and the second current sampling deviceCurrent input terminal connects, and the current output terminal of the first current sampling device is connected with the current input terminal of current sense comparator, theThe current output terminal of two current sampling devices is connected with the current input terminal of current sense comparator, the signal of current sense comparatorOutput is connected with the signal receiving end of PWM modulator, and the signal output part of PWM modulator and the signal of drive unit are acceptedEnd connects, and the driving signal output part of drive unit is connected with the control end of DC converter.
Surge protector health monitor of the present invention, wherein said signal processing unit comprises first microprocessor and multiple isolation electricityRoad, the signal output part of multiple buffer circuits is connected with the signal receiving terminal of first microprocessor respectively, the depositing of first microprocessorChu Duan is connected with the second read-only storage.
Surge protector health monitor of the present invention, what wherein said interface input block adopted is that model is HWPT072mAVoltage transformer; What photoelectric conversion unit adopted is the optical-electrical converter of TTL5VFC interface.
Surge protector health monitor difference from prior art of the present invention is: the present invention is provided with multiple signal monitoring listsUnit, can be to the size of the phase sequence voltage status of surge protector, malfunction, shell temperature, lightning current, bear thunder and lightningNumber of times and the peak value of stream carry out Real-Time Monitoring, and monitoring function variation, has greatly enriched monitored data, and monitor signal is more reliable.Not only can in the time that surge protector breaks down, monitor, and also can supervise under surge protector normal operating conditionsSurvey, by monitored data, the operation conditions of surge protector is judged in advance, improved surge protector reliability of operation.The output signal of surge protector health monitor is optical signal, has effectively solved the wrong report too much causing due to interfering signalAlert problem. Signal processing unit is provided with multiple buffer circuits, not only can isolate interfering signal and rub-out signal, alsoCan effectively isolate lightning current, avoid the damage of lightning current to surge protector health monitor.
Below in conjunction with accompanying drawing, surge protector health monitor of the present invention is described further.
Brief description of the drawings
Fig. 1 is that the structure of surge protector health monitor of the present invention connects block diagram;
Fig. 2 is phase shortage monitoring means in surge protector health monitor of the present invention, alternate uneven monitoring means and misphase monitoringCircuit structure diagram when unit access surge protector;
Fig. 3 is the circuit structure diagram of leakage current monitoring unit in surge protector health monitor of the present invention;
Fig. 4 is the circuit structure diagram of lightning current monitoring means in surge protector health monitor of the present invention;
Fig. 5 is the circuit structure diagram of power supply unit in surge protector health monitor of the present invention;
Fig. 6 is the circuit structure diagram of signal processing unit in surge protector health monitor of the present invention.
Detailed description of the invention
As shown in Figure 1, for the structure of surge protector health monitor of the present invention connects block diagram, comprise power supply unit 9, signalProcessing unit 10, photoelectric conversion unit 11 and multiple monitoring means, multiple monitoring means comprise again phase shortage monitoring means 2, alternateUneven monitoring means 3, misphase monitoring means 4, malfunction monitoring unit 5, leakage current monitoring unit 6, lightning current monitoring means7 and temperature monitoring unit 8. Phase shortage monitoring means 2, alternate uneven monitoring means 3, misphase monitoring means 4, malfunction monitoringMonitor signal receiving terminal and the interface of unit 5, leakage current monitoring unit 6, lightning current monitoring means 7 and temperature monitoring unit 8 are defeatedEnter unit 1 and connect, supervise to phase shortage monitoring means 2, alternate uneven monitoring means 3, misphase respectively by interface input block 1In measurement unit 4, malfunction monitoring unit 5, leakage current monitoring unit 6, lightning current monitoring means 7 and temperature monitoring unit 8, sendMonitor signal. The power end of power supply unit 9 is connected with power supply grid by interface input block 1, phase shortage monitoring means 2, phaseBetween uneven monitoring means 3, misphase monitoring means 4, malfunction monitoring unit 5, leakage current monitoring unit 6, lightning current monitoring singleUnit 7 is connected with the monitor signal output of temperature monitoring unit 8 and the monitor signal receiving terminal of signal processing unit 10, signal placeThe monitor signal output of reason unit 10 is connected with the signal receiving end of photoelectric conversion unit 11, the signal of photoelectric conversion unit 11Output is connected with interface output unit 12. The feeder ear of power supply unit 9 respectively with signal processing unit 10 and opto-electronic conversion listUnit's power end of 11 connects, and is respectively signal processing unit 10 and photoelectric conversion unit 11 is powered by power supply unit 9.
Shown in Fig. 2, be phase shortage monitoring means, alternate uneven monitoring means and mistake in surge protector health monitor of the present inventionCircuit structure diagram when phase monitoring means access surge protector, phase shortage monitoring means 2, alternate uneven monitoring means 3 and mistakePhase monitoring means 4 comprises control chip 21, multiple capacitor and multiple diode. At the first-phase that is connected to surge protector SPDOn line A, the second phase line phase B, third phase line C and neutral conductor N, draw respectively the first wire, the second wire, privates andPrivates, are in series with the first capacitor C1 and the 4th capacitor C4 on the first wire, be in series with the second electric capacity on the second wireDevice C2 and the 5th capacitor C5, be in series with electric three capacitor C3 and the 6th capacitor C6 on privates. The first wire,The other end of two wires and privates accesses between the first diode VD1 and the 3rd diode VD3 simultaneously, the first diodeThe positive pole of VD1 is connected with the negative pole of the 3rd diode VD3, and the other end of privates accesses the second diode VD2 and the 4thBetween diode VD4, the positive pole of the second diode VD2 is connected with the negative pole of the 4th diode VD4, the first diode VD1Negative pole be connected with the negative pole of the second diode VD2, the positive pole of the positive pole of the 3rd diode VD3 and the 4th diode VD4 connectsConnect, draw respectively at the negative pole of the second diode VD2 and the anodal two ends of the 4th diode VD4 the 5th wire parallel with one another,The 6th wire and the 7th wire, be provided with the 7th capacitor C7 on the 5th wire, be provided with the 5th diode VD5 on the 7th wire,The negative pole of the 5th diode is connected with the negative pole of the second diode VD2, the positive pole of the 5th diode VD5 and the 4th diode VD4Positive pole connect, on the 6th wire, be provided with control chip 21, the monitor signal of control chip 21 by state output end externalOutput. Wherein the first capacitor C1, the second capacitor C2, the 3rd capacitor C3, the 4th capacitor C4, the 5th capacitorThe capacitance of C5 and the 6th capacitor C 6 is 2.4 μ F, and the capacitance of the 7th capacitor C7 is 150 μ F, the first diode VD1,What the second diode VD2, the 3rd diode VD3, the 4th diode VD4 and the 5th diode VD5 adopted is all that model is1N4001 diode. Control chip 21 is the microcontroller chip of DF series.
The operation principle of phase shortage monitoring means, alternate uneven monitoring means and misphase monitoring means is: the first capacitor C1,Two capacitor C2, the 3rd capacitor C3, the 4th capacitor C4, the 5th capacitor C5 and the 6th capacitor C 6 are filter capacitor,The 7th capacitor C7 is for protection electric capacity, respectively by the first phase line A of surge protector SPD, the second phase line B, third phase linePhase voltage between C and neutral conductor N is transferred to control chip, and control chip 21 is to surge protector the first phase line A, second-phaseThe state of line B, third phase line C and neutral conductor N phase voltage is monitored, and by the state output end pair of control chip 21, if there is the phase voltage that the undesired situation of phase voltage or the wiring error due to installation, maintenance cause in outer output monitor signalUnusual condition, control chip 21 is controlled outside warning device and is reported to the police, thereby completes phase shortage monitoring means and misphase monitoring listThe monitoring task of unit; Control chip 21 is to the phase between the first phase line A, the second phase line B, third phase line C and neutral conductor NThe poised state of voltage is monitored, and externally exports monitor signal by the state output end of control chip 21, if there is electricity mutuallyPress the higher or on the low side situation to threshold value, control chip 21 is controlled outside warning device and is externally reported to the police, thereby completesThe monitoring task of alternate uneven monitoring means.
As shown in Figure 3, the circuit structure diagram of leakage current monitoring unit in surge protector health monitor of the present invention, leakage current prisonMeasurement unit 6 comprises voltage detecting circuit 31, integrating circuit 32, voltage comparator circuit 33 and electrical to optical converter 35. The first inputEnd IN+ is connected with voltage detecting circuit 31 respectively with the second input IN-, at first input end IN+ and voltage detecting circuit 31Between draw the first earth lead, the other end of the first earth lead access zero potential point GND, is provided with on the first earth leadZener diode D1, the negative pole of Zener diode D1 is connected with zero potential point GND. The signal output of voltage detecting circuit 31End is connected with the signal receiving end of integrating circuit 32, and the signal receiving end of integrating circuit 32 is also by sample resistance 34 and default defeatedEnter to hold INC to connect, the signal output part of integrating circuit 32 is connected with the signal receiving end of electrical to optical converter 35. Voltage detecting electricityThe signal output part on road 31 is connected with the signal receiving end of voltage comparator circuit 33, the signal output part of voltage comparator circuit 33 withThe signal receiving end of electronic switch 36 connects, and the control signal output of electronic switch 36 and the control end of electrical to optical converter 35 connectConnect, by electronic switch 36, the duty of electrical to optical converter 35 is controlled.
The operation principle of leakage current monitoring unit is: lightning current enters voltage inspection through first input end IN+ and the second input IN-In slowdown monitoring circuit 31, the voltage that voltage detecting circuit 31 produces lightning current and predeterminated voltage are transferred to voltage comparator circuit simultaneouslyIn 33, compare, once the voltage that lightning current produces higher than predeterminated voltage, triggers electronic switch action, the first photoelectricity turnsParallel operation 35 is converted to the signal of telecommunication by optical signal and externally reports to the police by warning device, thereby complete, thunder and lightning flow valuve is monitoredTask. The voltage transmission that voltage detecting circuit 31 also produces lightning current is to integrating circuit 32, and integrating circuit 32 is to voltageSignal carries out Integral Processing, and signal after treatment is transferred to electrical to optical converter 35, and electrical to optical converter 35 is by the integration receivingSignal is transferred to storage device and stores.
As shown in Figure 4, be the circuit structure diagram of lightning current monitoring means in surge protector health monitor of the present invention, lightning currentMonitoring means 7 comprises Luo-coil 42, A/D converter 44, alarm device 47 and the second microprocessor 41. Luo-coil 42Signal output part be connected with the signal receiving end of A/D converter 44 by signal transmitting apparatus 43, A/D converter 44Signal output part is connected with the signal receiving end of the second microprocessor 41, the storage end of the second microprocessor 41 and the first read-only depositingReservoir 45 connects, and the data output end of the second microprocessor 41 is connected with display unit 46, the control of the second microprocessor 41Signal output part is connected with the control end of alarm device 47, and the control end of the second microprocessor 41 is connected with control button 49, passes throughControlling button 49 controls the second microprocessor 41.
The operation principle of lightning current monitoring means is: Luo-coil 42 receives lightning current signals, and by signal transmitting apparatus 43Lightning current signals is transferred to A/D converter 44, and A/D converter 44 is converted to the analog signal receiving after data signalBe transferred to after the second microprocessor 41, the second microprocessors 41 record and analyze the data signal receiving and store intoIn one read-only storage 45, the second microprocessor 41 also externally shows by display unit 46 data that receive, once receiveTo the peak value of lightning current or the lightning current quantity receiving within the unit interval exceed predetermined value, the second microprocessor 41 is controlledAlarm device 47 externally sends alarm signal. The second microprocessor 41 is also provided with controls button 49, right by controlling button 49The duty of the second microprocessor 41 is controlled.
As shown in Figure 5, be the circuit structure diagram of power supply unit in surge protector health monitor of the present invention, power supply unit 9 wrapsDraw together line filter 51, DC converter 53, current sense comparator 56, PWM modulator 60, multiple current rectifying and wave filtering circuitWith multiple current sampling devices. The current input terminal access power supply grid of line filter 51, the electric current of line filter 51 is defeatedGo out end and be connected with the current input terminal of the first current rectifying and wave filtering circuit 52, the current output terminal of the first current rectifying and wave filtering circuit 52 and direct currentThe current input terminal of converter 53 connects, and the electric current of the current output terminal of DC converter 53 and the second current rectifying and wave filtering circuit 54 is defeatedEnter end and connect, externally power by the current output terminal of the second current rectifying and wave filtering circuit 54. The electric current of DC converter 53 is defeatedEnter end and the current output terminal of DC converter 53 also respectively with current input terminal and second electric current of the first current sampling device 55The current input terminal of sampler 58 connects, the current output terminal of the first current sampling device 55 and current sense comparator 56Current input terminal connects, and the current output terminal of the second current sampling device 58 is by error amplifier 59 and current sense comparator56 current input terminal connects, and the signal receiving end of the signal output part of current sense comparator 56 and PWM modulator 60 connectsConnect, the signal output part of PWM modulator 60 is connected with the signal receiving terminal of drive unit 57, the driving letter of drive unit 57Number output is connected with the control end of DC converter 53.
The operation principle of power supply unit is: line filter 51 is connected with power supply grid, successively by line filter 51 and theOne current rectifying and wave filtering circuit 52 carries out filtering and rectification to supply current, and the direct current after rectification is converted to by DC converter 53Alternating current, the second current rectifying and wave filtering circuit 54 carries out externally powering after rectification and filtering to alternating current. DC converter 53Current input terminal is also connected with the first current sampling device 55 and the second current sampling device 58 respectively with current output terminal, and firstCurrent sampling device 55 and the second current sampling device 58 are respectively to flowing into the electric current of DC converter 53 and flowing out DC converter53 electric current extracts, and the electric current of extraction is input to respectively in current sense comparator 56 and carries out error ratio, onceError exceeds predefined error amount, and PWM modulator 60 can send modulation signal to drive unit 57, makes DC converter53 quit work. By make the electric current fiducial value of input and output be less than error amount to the adjustment of DC converter 53, supplyElectric unit 9 recovers supplying power for outside.
As shown in Figure 6, be the circuit structure of signal processing unit in surge protector health monitor of the present invention, signal is processed singleUnit 10 comprises first microprocessor 71, self-starting device 73 and multiple buffer circuit. The signal receiving end of multiple buffer circuits fromThe outside signal that receives, the signal output part of multiple buffer circuits is connected with the signal receiving terminal of first microprocessor 71 respectively, and firstThe signal output part of microprocessor 71 externally carries out signal output, the storage end of first microprocessor 71 and the second read-only storage72 connect, and the control end of first microprocessor 71 is connected with the control signal output of self-starting device 73, fills by self-startingPutting 73 pairs of first microprocessors 71 controls.
The operation principle of signal processing unit is: the monitor signal of each monitoring means is transferred to respectively first micro-by each buffer circuitProcessor 71, buffer circuit carries out Isolation processing to monitor signal, the superfluous signal in filtering monitor signal, and stopThe interference of other false signals, thereby the rate of false alarm of minimizing alarm signal. Each monitor signal is passed through output by first microprocessor 71Externally output, first microprocessor 71 is also transferred to the each monitor signal receiving the second read-only storage 72 inside and stores upDeposit. First microprocessor 71 is controlled by self-starting device 73.
What in one embodiment of the present of invention, interface input block 1 adopted is that model is the voltage transformer of HWPT072mA; TemperatureWhat degree monitoring means 8 adopted is that model is the thermistor of PTC100 and the thermal protector that model is KSD201; Malfunction monitoringWhat unit 5 adopted is that model is the electromagnetic relay of JQC-3FF-S-H; That photoelectric conversion unit 11 adopts is TTL5VFCThe optical-electrical converter of interface; What interface output unit 12 adopted is that model is the control chip of UDN2981AT.
Operation principle of the present invention is: interface input block 1 is connected with power supply grid, surge protector SPD by the first phase line A,It is single that the phase voltage of the second phase line B, third phase line C and neutral conductor N and phase current are transferred to each monitoring by interface input block 1Unit, phase shortage monitoring means 2, alternate uneven monitoring means 3 and misphase monitoring means 4 are respectively to the first phase line A, second-phasePhase voltage situation between line B, third phase line C and neutral conductor N is monitored. Malfunction monitoring unit 5 is to surge protector SPDShort circuit and open circuit situation monitor, in the time there is the situation of short circuit or open circuit in surge protector SPD, malfunction monitoring unit5 disconnect and make surge protector exit electric power loop, and externally send alarm signal by external warning device, thereby avoidThe generation of major accident. Monitor the current value of the lightning current by surge protector SPD leakage current monitoring unit 6. ThunderCurrent monitoring unit 7 is to the lightning current number of times by surge protector SPD and peak value is monitored and record. Temperature monitoring unitThe temperature of 8 pairs of surge protector SPD body surfaces is monitored, when temperature is during higher than preset value, by external warning device pairSend alarm signal outward, once the temperature of surge protector SPD body surface exceedes the safe working temperature point of internal circuit, pass throughThermal protector sends fault-signal to malfunction monitoring unit 5, and malfunction monitoring unit 5 disconnects surge protector SPD is exitedElectric power loop, ensures that surge protector SPD is not damaged. Monitor signal is transferred to respectively signal processing unit by each monitoring means10, signal processing unit 10 also carries out analyzing and processing to the monitor signal receiving, and removes interfering signal. Signal processing unitSignal after treatment is transferred to photoelectric conversion unit 11 by 10, and the signal of telecommunication receiving is converted to light letter by photoelectric conversion unit 11Number, and strengthen antijamming capability and the Electromgnetic seat performance of surge protector SPD health monitor self. Final defeated by interfaceGoing out unit 12 externally exports monitor signal after treatment. Respectively signal processing unit 10 and photoelectricity are turned by power supply unit 9Changing unit 11 powers.
Surge protector health monitor of the present invention, is provided with multiple signal monitorings unit, can be to the phase of surge protector SPDThe size of sequence voltage state, malfunction, shell temperature, lightning current, the number of times that bears lightning current and peak value are supervised in real timeSurvey, monitoring function variation, has greatly enriched monitored data, and monitor signal is more reliable. Not only can be at surge protector SPDWhile breaking down, monitor, and also can monitor under surge protector SPD normal operating conditions, pass through monitored dataOperation conditions to surge protector SPD judges in advance, has improved surge protector SPD reliability of operation. SurgeThe output signal of protector health monitor is optical signal, has effectively solved the false alarm too much causing due to interfering signal and has askedTopic. Signal processing unit 10 is provided with multiple buffer circuits, not only can isolate interfering signal and rub-out signal, can alsoEnough effectively isolation lightning currents, avoid the damage of lightning current to surge protector health monitor. The present invention is safe, monitoringSignal kinds is many, monitor signal is accurate, compared with prior art has obvious advantage.
Above-described embodiment is described the preferred embodiment of the present invention, not scope of the present invention is carried outLimit, design under the prerequisite of spirit not departing from the present invention, those of ordinary skill in the art make technical scheme of the present inventionVarious distortion and improvement, all should fall in the definite protection domain of the claims in the present invention book.
Claims (10)
1. a surge protector health monitor, is characterized in that: comprise power supply unit (9), signal processing unit (10), lightElectricity converting unit (11) and multiple monitoring means, multiple monitoring means comprise again phase shortage monitoring means (2), alternate uneven monitoring listUnit (3), misphase monitoring means (4), leakage current monitoring unit (6) and lightning current monitoring means (7), phase shortage monitoring means (2), alternateThe monitor signal of uneven monitoring means (3), misphase monitoring means (4), leakage current monitoring unit (6) and lightning current monitoring means (7)Receiving terminal is connected with interface input block (1) respectively, and the power end of power supply unit (9) connects by interface input block (1) and power supply gridConnect phase shortage monitoring means (2), alternate uneven monitoring means (3), misphase monitoring means (4), leakage current monitoring unit (6) and thunderThe monitor signal output of current monitoring unit (7) is connected with the monitor signal receiving terminal of signal processing unit (10), and signal is processed singleThe monitor signal output of unit (10) is connected with the signal receiving end of photoelectric conversion unit (11), and the signal of photoelectric conversion unit (11) is defeatedGo out end be connected with interface output unit (12), the feeder ear of power supply unit (9) respectively with signal processing unit (10) and photoelectric conversion unit(11) power end connects.
2. surge protector health monitor according to claim 1, is characterized in that: described multiple monitoring means also wrapDraw together malfunction monitoring unit (5) and temperature monitoring unit (8), the monitor signal of malfunction monitoring unit (5) and temperature monitoring unit (8) receivesEnd is connected with interface input block (1), monitor signal output and the signal processing of malfunction monitoring unit (5) and temperature monitoring unit (8)The monitor signal receiving terminal of unit (10) connects.
3. surge protector health monitor according to claim 2, is characterized in that: described malfunction monitoring unit (5)What adopt is that model is the electromagnetic relay of JQC-3FF-S-H; What temperature monitoring unit (8) adopted is that model is the heat of PTC100Quick resistance and model are the thermal protector of KSD201.
4. surge protector health monitor according to claim 1, is characterized in that: described phase shortage monitoring means (2),Alternate uneven monitoring means (3) and misphase monitoring means (4) comprise control chip (21) and multiple diode, are being connected to surge protectionOn the first phase line (A), the second phase line (B), third phase line (C) and the neutral conductor (N) of device (SPD), draw respectively the first wire, secondWire, privates and privates, the other end of the first wire, the second wire and privates accesses the first diode (VD1)And between the 3rd diode (VD3), the positive pole of the first diode (VD1) is connected with the negative pole of the 3rd diode (VD3), and the 4th leadsThe other end of line accesses between the second diode (VD2) and the 4th diode (VD4), the positive pole of the second diode (VD2) and the 4thThe negative pole of diode (VD4) connects, and the negative pole of the first diode (VD1) is connected with the negative pole of the second diode (VD2), and the three or twoThe positive pole of utmost point pipe (VD3) is connected with the positive pole of the 4th diode (VD4), at negative pole and the 4th diode of the second diode (VD2)(VD4) the 6th wire parallel with one another and the 7th wire are drawn respectively in anodal two ends, are provided with the 5th diode on the 7th wire(VD5), the negative pole of the 5th diode is connected with the negative pole of the second diode (VD2), the positive pole of the 5th diode (VD5) and the 4thThe positive pole of diode (VD4) connects, and is provided with control chip (21) on the 6th wire, and control chip is provided with State-output on (21)End.
5. surge protector health monitor according to claim 4, is characterized in that: on described the first wire, be in series withThe first capacitor (C1) and the 4th capacitor (C4), be in series with the second capacitor (C2) and the 5th capacitor (C5) on the second wire, theOn three wires, be in series with electric three capacitors (C3) and the 6th capacitor (C6), at negative pole and the 4th diode of the second diode (VD2)(VD4) the 5th wire in parallel is drawn at anodal two ends, is provided with the 7th capacitor (C7) on the 5th wire.
6. surge protector health monitor according to claim 1, is characterized in that: described leakage current monitoring unit (6)Comprise voltage detecting circuit (31), integrating circuit (32), voltage comparator circuit (33) and electrical to optical converter (35), first input end (IN+)Be connected the signal output part of voltage detecting circuit (31) and integrating circuit (32) with voltage detecting circuit (31) with the second input (IN-)Signal receiving end connect, the signal receiving end of integrating circuit (32) is connected with default input (INC) by sample resistance (34),The signal output part of integrating circuit (32) is connected with the signal receiving end of electrical to optical converter (35), and the signal of voltage detecting circuit (31) is defeatedGo out end and be connected with the signal receiving end of voltage comparator circuit (33), the signal output part of voltage comparator circuit (33) and electronic switch (36)Signal receiving end connect, the control signal output of electronic switch (36) is connected with the control end of electrical to optical converter (35).
7. surge protector health monitor according to claim 1, is characterized in that: described lightning current monitoring means (7)Comprise Luo-coil (42), A/D converter (44), alarm device (47) and the second microprocessor (41), the signal of Luo-coil (42) is defeatedGo out end and be connected with the signal receiving end of A/D converter (44), the signal output part of A/D converter (44) and the second microprocessor (41)Signal receiving end connect, the storage end of the second microprocessor (41) is connected with the first read-only storage (45), the second microprocessor (41)Data output end be connected with display unit (46), the control of the control signal output of the second microprocessor (41) and alarm device (47)End connects.
8. surge protector health monitor according to claim 1, is characterized in that: described power supply unit (9) comprises directlyCurrent converter (53), current sense comparator (56), PWM modulator (60), multiple current rectifying and wave filtering circuit and multiple current sampling dressPut, the current input terminal of the first current rectifying and wave filtering circuit (52) is by line filter (51) access power supply grid, the first rectifying and wave-filtering electricityThe current output terminal on road (52) is connected with the current input terminal of DC converter (53), the current output terminal of DC converter (53) andThe current input terminal of two current rectifying and wave filtering circuits (54) connects, the electricity of the current input terminal of DC converter (53) and DC converter (53)Stream output is also inputted with the current input terminal of the first current sampling device (55) and the electric current of the second current sampling device (58) respectivelyEnd connects, and the current output terminal of the first current sampling device (55) is connected with the current input terminal of current sense comparator (56), and secondThe current output terminal of current sampling device (58) is connected with the current input terminal of current sense comparator (56), current sense comparator(56) signal output part is connected with the signal receiving end of PWM modulator (60), the signal output part of PWM modulator (60) with driveThe signal receiving terminal of moving device (57) connects, and the control end of the driving signal output part of drive unit (57) and DC converter (53) connectsConnect.
9. surge protector health monitor according to claim 1, is characterized in that: described signal processing unit (10)Comprise first microprocessor (71) and multiple buffer circuit, the signal output part of multiple buffer circuits respectively with first microprocessor (71)Signal receiving terminal connect, the storage end of first microprocessor (71) is connected with the second read-only storage (72).
10. surge protector health monitor according to claim 1, is characterized in that: described interface input block (1)What adopt is that model is the voltage transformer of HWPT072mA; What photoelectric conversion unit (11) adopted is TTL5VFC interfaceOptical-electrical converter.
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| CN201610124830.4A CN105676035A (en) | 2016-03-04 | 2016-03-04 | Surge protection device health monitor |
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| CN106124898A (en) * | 2016-07-13 | 2016-11-16 | 上海优泰欧申机电有限公司 | The monitoring device of power source surge protector and monitoring method |
| CN106208374A (en) * | 2016-08-09 | 2016-12-07 | 上海优泰欧申机电有限公司 | The monitoring device of SPD on signal side and monitoring method |
| CN107462789A (en) * | 2017-07-17 | 2017-12-12 | 南京宁普防雷设备制造有限公司 | A kind of on-line analysis surge protector life-span and the method for failure |
| CN110221153A (en) * | 2019-07-24 | 2019-09-10 | 阳光电源股份有限公司 | A kind of lightning protection device fault detection circuit and method |
| CN111103483A (en) * | 2019-12-16 | 2020-05-05 | 广州市海德防雷科技有限公司 | Lightning protection device intelligent monitoring system based on internet of things technology |
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