CN104810806B - For accessing the protective device of grid equipment - Google Patents
For accessing the protective device of grid equipment Download PDFInfo
- Publication number
- CN104810806B CN104810806B CN201510137239.8A CN201510137239A CN104810806B CN 104810806 B CN104810806 B CN 104810806B CN 201510137239 A CN201510137239 A CN 201510137239A CN 104810806 B CN104810806 B CN 104810806B
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- resistance
- protective device
- igbt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 230000004224 protection Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Inverter Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
For accessing a protective device for grid equipment, comprised current feedback circuit, drive error feedback circuit, fault feedback circuit, switch controlling signal generative circuit and locking signal generative circuit. It is of the present invention that for accessing, the protective device of grid equipment has been realized automatically and the mode of manual two kinds of excision equipment; in the situation that all electic protections are malfunctioning; cannot complete automatic excision equipment time; can carry out artificially excising equipment in manual mode; ensure that access grid equipment can safe and stable operation, thereby ensure the stable operation of correspondent section electrical network. Protective device simple and stable of the present invention, cost be low, be easy to realize, and its Universal and scalability is conducive to the marketing of protective device.
Description
Technical field
The present invention relates to a kind of protective device, relate in particular to a kind of for accessing the protection of grid equipmentDevice.
Background technology
Along with the fast development of power system and popularizing of intelligent grid equipment application, various numbers in transformer stationThe access amount of word, analog machine is increasing, and meanwhile, same transformer station also faces different manufacturers systemThe access of equipment and platform, therefore, just arises at the historic moment for the access grid equipment of seamless integration and access,For example, intelligent grid signal pickup assembly, IEC61850 protocol conversion apparatus etc., it also can be used as onePlant modern communication equipment. The various protections of access grid equipment self become a key of its stable operationTechnology is also the foundation stone of access grid equipment safety and stability. According to " People's Republic of China's machinery industryStandard JB/T11067-2011 " in technical requirement, require electric imitating signal collecting device to haveThe self-protection such as overcurrent, overvoltage function, carrying out these protections is also the necessary bar that improves abatement equipment performancePart, makes these access grid equipments such as intelligent grid signals collecting and IEC61850 protocol conversion apparatusVarious duties, in stable state, are also the bases that late-class circuit current harmonics is analyzed, thereby, connectThe general protective circuit that enters grid equipment becomes in efficiency, stability important of improving access grid equipmentHold.
Large in these access grid equipments such as intelligent grid signals collecting and IEC61850 protocol conversion apparatusHow all to include high-power IGBT module, it is the transmission, conversion and the process control thereof that realize electric energyCore component, the use that it makes electric energy more efficiently, more energy-conservation, more environmental protection, " slightly electricity " become to " essenceElectricity ", therefore it is basic technology and the core technology of energy-saving and emission-reduction. But, due to the spy of IGBT deviceProperty, its be easy to because of overvoltage/overcurrent or excess temperature breakdown, cause the inefficacy of IGBT device. Due to thisImportance and the device property of a little high-power IGBT modules, therefore, existing great majority access grid equipmentSelf be all designed with IGBT overvoltage overheat protector module. But it only can be to accessing in grid equipmentHigh-power IGBT module realizes overcurrent, overvoltage, overheat protector, can not be to whole access grid equipmentCarry out comprehensive overcurrent, overvoltage and error protection.
For this reason, lot of domestic and international scholar has proposed different comprehensive method of protections, for example, use integrated protectionSystem, or the guard method of use multistep treatment etc., still, so all greatly increase and used this skillThe one-tenth of these access grid equipments of intelligent grid signals collecting and the IEC61850 protocol conversion apparatus etc. of artThis.
Summary of the invention
For this reason, technical problem to be solved by this invention is to overcome guard method of the prior art and establishesThe standby high defect of cost, what propose that a kind of simple and stable, cost are low, be easy to realize establishes for accessing electrical networkStandby protective device.
For solving the problems of the technologies described above, of the present invention a kind of for accessing the protective device of grid equipment, bagDraw together:
Cross current feedback circuit, for receiving three-phase over-current signal, and generate according to described three-phase over-current signalComprehensive over-current signal;
Drive error feedback circuit, for receiving three-phase drive rub-out signal, and according to described three-phase driveRub-out signal generates comprehensive drive error signal;
Fault feedback circuit, for receiving the overvoltage letter from the high-power IGBT of access grid equipmentNumber, the excess temperature signal of described IGBT, described comprehensive over-current signal and described comprehensive drive error signal,And according to the excess temperature signal of the overvoltage signal of described IGBT, described IGBT, described comprehensive over-current signal andDescribed comprehensive drive error signal generates resultant fault signal;
Switch controlling signal generative circuit, for generating the group switch control letter of described access grid equipmentNumber;
Locking signal generative circuit, for receiving described resultant fault signal and described group switch control letterNumber, and export to according to described resultant fault signal and described group switch control signal generation locking signalDescribed access grid equipment, to control the power on/off of described access grid equipment.
Preferably, described switch controlling signal generative circuit comprises:
Hand switch control signal generative circuit, for generating hand switch control signal;
The first switch controlling signal synthetic circuit, for receiving the microcontroller from described access grid equipmentThe intelligent switching control signal of device and described hand switch control signal, and according to described intelligent switching controlSignal and described hand switch control signal generate described group switch control signal.
Preferably, described switch controlling signal generative circuit comprises:
Hand switch control signal generative circuit, for generating hand switch control signal;
The first switch controlling signal synthetic circuit, for receiving the microcontroller from described access grid equipmentThe intelligent switching control signal of device and described hand switch control signal, and according to described intelligent switching controlSignal and described hand switch control signal generate the first group switch control signal;
Second switch control signal synthetic circuit, for receiving the forceful electric power control from described access grid equipmentThe electric switch control signal of circuit processed and described the first group switch control signal, and according to described electricSwitch controlling signal and described the first group switch control signal generate described group switch control signal.
Preferably, described hand switch control signal generative circuit comprises switch and electric capacity; Described switch bagDraw together a moved end and two quiet ends, in the time being placed in primary importance, described moved end and the first quiet end conducting, whenWhile being placed in the second place, described moved end and the second quiet end conducting; Described the first quiet end is connected with power end,Described the second quiet end is connected with earth terminal, described moved end and described the first switch controlling signal synthetic circuitInput connects; Described electric capacity is connected across between the first quiet end and the second quiet end of described switch.
Preferably, described the first switch controlling signal synthetic circuit and described second switch control signal are comprehensiveCircuit all adopts gate circuit to realize.
Preferably, described current feedback circuit, described drive error feedback circuit and the described fault feedback electricity crossedRoad all adopts gate circuit to realize.
Preferably, described gate circuit be or door, with door, not gate and XOR gate in one or more combinationCircuit.
Preferably, described locking signal generative circuit comprises the 3rd or door chip, the first resistance, the second electricityResistance, the first light emitting diode and the first triode, the described the 3rd or the first input end of door chip with described inThe output of fault feedback circuit connects, its second input and described switch controlling signal generative circuitOutput connects, and its output is connected with one end of described the first resistance; The other end of described the first resistanceBe connected with the base stage of described the first triode; The emitter stage of described the first triode is connected with earth terminal, itsColelctor electrode is connected with one end of described the first light emitting diode; The other end of described the first light emitting diode withOne end of described the second resistance connects; The other end of described the second resistance is connected with power end; Described firstThe output of the very described locking signal of the current collection of triode.
Preferably, described protective device also comprises failure indicating circuit, and described failure indicating circuit comprises threePhase over current fault indicating circuit, three-phase drive fault indicating circuit, IGBT overvoltage indicating fault electricityRoad and IGBT excess temperature failure indicating circuit;
Described three-phase over current fault indicating circuit comprises the second light emitting diode and the 3rd resistance, described secondOne end of light emitting diode is connected with the described output of crossing current feedback circuit, the other end and described the 3rd electricityOne end of resistance connects; The other end of described the 3rd resistance is connected with power end;
Described three-phase drive fault indicating circuit comprises the 3rd light emitting diode and the 4th resistance, described inOne end of the 3rd light emitting diode is connected with the output of described drive error feedback circuit, the other end and instituteOne end of stating the 4th resistance connects; The other end of described the 4th resistance is connected with power end;
Described IGBT overvoltage failure indicating circuit comprises the 4th light emitting diode and the 5th resistance, describedThe overvoltage signal of described IGBT is inputted in one end of four light emitting diodes, the other end and described the 5th resistanceOne end connects; The other end of described the 5th resistance is connected with power end;
Described IGBT excess temperature failure indicating circuit comprises the 5th light emitting diode and the 6th resistance, describedThe excess temperature signal of described IGBT is inputted in one end of five light emitting diodes, the other end and described the 6th resistanceOne end connects; The other end of described the 6th resistance is connected with power end.
Preferably, described protective device also comprises electrical control signal generative circuit;
Described electrical control signal generative circuit comprises the second triode and the 7th resistance; Described the 7th resistanceOne end be connected with the output of described fault feedback circuit, the base of its other end and described the second triodeThe utmost point connects; The emitter stage of described the second triode is connected with earth terminal, the very described electrical control of its current collectionThe output of signal.
Technique scheme of the present invention has the following advantages compared to existing technology:
Protective device of the present invention utilizes IGBT's that the holding circuit of existing high-power IGBT module providesThe excess temperature signal of overvoltage signal and IGBT, and in conjunction with three-phase over-current signal and three-phase drive rub-out signal,Process and form resultant fault signal through circuit synthesis, can be used for realizing the three-phase mistake of access grid equipmentThe function of the fault alarm of stream, three-phase drive mistake, IGBT overvoltage, IGBT excess temperature, by switch controlThe group switch control signal that signal generating circuit processed provides can realize the function of excision equipment, makes accessGrid equipment can safe and stable operation, thereby ensures the stable operation of correspondent section electrical network.
Protective device of the present invention also adopts automatically and manual two kinds of modes of excising equipment, all electricProtect in malfunctioning situation, cannot complete automatic excision equipment time, can carry out in manual mode artificialExcision equipment, the safety of guarantee access grid equipment. In addition, the automatic excision equipment of this protective deviceTwo kinds of modes in mode, are also designed: the intelligent switch that can utilize the microcontroller such as single-chip microcomputer, DSP to provideThe control mode that control signal realizes and the electric switch that can utilize outside strong electrical control circuit to provideThe control mode that control signal realizes, forward and backward person is conducive to judge when protective device of the present inventionThere is the situation of three-phase overcurrent, three-phase drive mistake, IGBT overvoltage, IGBT excess temperature or fault alarm etc.Time, can directly control immediately the break-make that accesses grid equipment, the safety of protection access grid equipment; The formerAlso help by microcontroller and control with the process of programming, meet access grid equipment respectivelyFault judgement and security control while planting design requirement, the safe and stable operation of guarantee access grid equipment.By the excision mode of access grid equipment having been designed to above-mentioned manual, automatic various ways, increaseThe possibility of various control, in order to realizing control by another kind in the situation that of a kind of may inefficacySystem, has ensured that access grid equipment can safe and stable operation better. Simultaneously also electric by having designed,The control mode of intelligence, for protective device of the present invention has increased Universal and scalability.
Protective device of the present invention has adopted failure indicating circuit, can will whether have three-phase overcurrent, threePhase drive error, IGBT overvoltage and IGBT excess temperature fault indicate with the form of fault alarm, convenientUser can judge whether there is above failure condition in real time, intuitively, to excise in time access electricityNet equipment, the safety of protection access grid equipment and correspondent section electrical network.
The circuit function of the every part of protective device of the present invention is clear and definite, simple and stable, be easy to realize, with letterSingle current feedback circuit excessively, drive error feedback circuit, fault feedback circuit, on-off circuit, locking letterThe circuit parts such as number generative circuit, have completed the integrated protection to access grid equipment, have components and parts few,The advantages such as circuit is simple, good stability, security height, have reduced the cost of protective device, its versatilityBe conducive to the marketing of protective device of the present invention with extensibility.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below according to specific embodiment of the inventionAlso by reference to the accompanying drawings, the present invention is further detailed explanation, wherein for example
Fig. 1 is a kind of for accessing the structural frames of protective device of grid equipment of the embodiment of the present invention 1Figure;
Fig. 2 is a kind of for accessing the structural frames of protective device of grid equipment of the embodiment of the present invention 2Figure;
Fig. 3 is an instantiation of the switch controlling signal generative circuit in the embodiment of the present invention 1Structured flowchart;
Fig. 4 is another instantiation of the switch controlling signal generative circuit in the embodiment of the present invention 1Structured flowchart;
Fig. 5 is a kind of for accessing the tool of protective device of grid equipment of the embodiment of the present invention 2The circuit diagram of body example.
In figure, Reference numeral is expressed as: 10-crosses current feedback circuit, 20-drive error feedback circuit, 30-Fault feedback circuit, 40-switch controlling signal generative circuit, 50-locking signal generative circuit, 60-eventBarrier indicating circuit, 70-electrical control signal generative circuit, 401-hand switch control signal generative circuit,402-the first switch controlling signal synthetic circuit, 403-second switch control signal synthetic circuit.
Detailed description of the invention
It is a kind of for accessing the structure of protective device of grid equipment that Fig. 1 shows the embodiment of the present invention 1Block diagram, as shown in Figure 1, of the present invention a kind of for accessing the protective device of grid equipment, comprise overcurrentFeedback circuit 10, drive error feedback circuit 20, fault feedback circuit 30, switch controlling signal generateCircuit 40 and locking signal generative circuit 50.
Cross current feedback circuit 10 for receiving A/B/C three-phase over-current signal OCA, OCB, OCC, and rootCarry out comprehensively according to this OCA, OCB, OCC, generate comprehensive over-current signal OC and export to fault feedback circuit30. Drive error feedback circuit 20 for receive A/B/C three-phase drive rub-out signal ERRA, ERRB,ERRC, and carry out comprehensively according to this ERRA, ERRB, ERRC, comprehensive drive error signal ERR generatedExport to fault feedback circuit 30.
Fault feedback circuit 30 for receive IGBT overvoltage signal OV, IGBT excess temperature signal OH withAnd cross that the comprehensive over-current signal OC that generates of current feedback circuit 10 and drive error feedback circuit 20 generateComprehensive drive error signal ERR, and carry out comprehensively according to OV, OH, OC, ERR, resultant fault generatedSignal FAULT exports to locking signal generative circuit 50. Overvoltage signal OV and the IGBT of above-mentioned IGBTThe holding circuit of excess temperature signal OH high-power IGBT module in grid equipment from access, IGBTOvervoltage signal OV be used to indicate IGBT and exist the situation of overvoltage, the excess temperature signal OH of IGBT is used in reference toShow that IGBT exists the situation of excess temperature.
Switch controlling signal generative circuit 40 is for generating the group switch control signal of access grid equipmentCONTROL exports to locking signal generative circuit 50.
The resultant fault signal that locking signal generative circuit 50 generates for receiving fault feedback circuit 30The group switch control signal CONTROL that FAULT and switch controlling signal generative circuit 40 generate, and rootCarry out comprehensively according to this resultant fault signal FAULT and group switch control signal CONTROL, generate lockingSignal LOCK exports to the microcontroller of access grid equipment, to control the break-make of access grid equipment.
Protective device of the present invention utilizes IGBT's that the holding circuit of existing high-power IGBT module providesThe excess temperature signal of overvoltage signal and IGBT, and in conjunction with three-phase over-current signal and three-phase drive rub-out signal,Process and form resultant fault signal through circuit synthesis, can be used for realizing the three-phase mistake of access grid equipmentThe function of the fault alarm of stream, three-phase drive mistake, IGBT overvoltage, IGBT excess temperature, by switch controlThe group switch control signal that signal generating circuit processed provides can realize the function of excision equipment, makes accessGrid equipment can safe and stable operation, thereby ensures the stable operation of correspondent section electrical network.
It is a kind of for accessing the structure of protective device of grid equipment that Fig. 2 shows the embodiment of the present invention 2Block diagram, as shown in Figure 2, protective device of the present invention also comprises failure indicating circuit 60. More preferably,Also comprise electrical control signal generative circuit 70.
Failure indicating circuit 60 for receive IGBT overvoltage signal OV, IGBT excess temperature signal OH,Comprehensive over-current signal OC and comprehensive drive error signal ERR, and convert respectively it to fault alarmForm indicates. The form of this fault alarm can adopt LED lamp to realize, or adopts buzzerRealize, or adopt other alarms that can realize warning function to realize. Failure indicating circuit60 can by whether exist three-phase overcurrent, three-phase drive mistake, IGBT overvoltage and IGBT excess temperature fault withThe form of fault alarm indicates, facilitate user to judge in real time, intuitively whether to exist withUpper failure condition, to excise in time access grid equipment, protection access grid equipment and correspondent section electrical networkSafety.
Electrical control signal generative circuit 70 is for receiving resultant fault signal FAULT, and by its conversionFor electrical control signal is exported to the strong electrical control circuit of described access grid equipment, to control described accessThe break-make of grid equipment. Electrical control signal generative circuit 70 turns resultant fault signal FAULTChange rear output, also can be used for other purposes such as panel instruction.
The concrete structure of above-mentioned switch controlling signal generative circuit 40 will be specifically described below. As firstPlant instantiation, as shown in Figure 3, switch controlling signal generative circuit 40 comprises hand switch control letterNumber generative circuit 401 and the first switch controlling signal synthetic circuit 402. Hand switch control signal generatesCircuit 401 is exported to comprehensively electricity of described the first switch controlling signal for generating hand switch control signalRoad 402. Input of the first switch controlling signal synthetic circuit 402 and hand switch control signalThe output of generative circuit 401 connects, and generates for receiving hand switch control signal generative circuit 401Hand switch control signal, another input of the first switch controlling signal synthetic circuit 402 is used forReceive the intelligent switching control signal from the microcontroller of access grid equipment, the first switch controlling signalSynthetic circuit 402 carries out comprehensively according to this intelligent switching control signal and hand switch control signal, generatesGroup switch control signal is exported to locking signal generative circuit 50.
As the second instantiation, as shown in Figure 4, switch controlling signal generative circuit 40 is except bagDraw together beyond the circuit in above-mentioned the first instantiation, also comprise second switch control signal synthetic circuit403. Second switch control signal synthetic circuit 403 is connected on after the circuit of the first instantiation, itsAn input is connected with the output of the first switch controlling signal synthetic circuit 402, for receiving firstThe first group switch control signal that switch controlling signal synthetic circuit 402 generates, second switch control letterAnother input of number synthetic circuit 403 is for receiving the heavy-current control electricity from access grid equipmentThe electric switch control signal QD_Switch_Lock on road, second switch control signal synthetic circuit 403Combine according to this electric switch control signal QD_Switch_Lock and the first group switch control signalClose, generate group switch control signal and export to locking signal generative circuit 50. Those skilled in the artThe acquisition that should be appreciated that group switch control signal is not limited to only be opened by hand switch control signal, intelligenceComprehensively obtaining of one or several in pass control signal or electric switch control signal, also can adoptOther switch controlling signals comprehensively obtain, and it is individual arbitrarily after the circuit of the second instantiation, to connectSwitch controlling signal synthetic circuit is realized.
By switch controlling signal generative circuit 40 of the present invention, protective device of the present invention has been realized certainlyThe mode of moving and manual two kinds of excision equipment, in the situation that all electic protections are malfunctioning, cannot complete certainlyWhen moving excision equipment, can carry out artificially excising equipment in manual mode, guarantee access grid equipmentSafety. In the time realizing automatic excision equipment, the intelligence that can utilize the microcontroller such as single-chip microcomputer, DSP to provideThe control mode that switch controlling signal is realized, or also can utilize outside strong electrical control circuit to provideThe control mode that electric switch control signal realizes, forward and backward person is conducive to when protection dress of the present inventionPut to judge and have three-phase overcurrent, three-phase drive mistake, IGBT overvoltage, IGBT excess temperature or fault alarmDeng situation time, can directly control immediately the break-make of access grid equipment, the peace of protection access grid equipmentEntirely; The former also helps by intelligent controller and controls with the process of programming, meets access electricityFault judgement and the security control of net equipment in the time of various design requirement, the safety of guarantee access grid equipmentStable operation. By the excision mode of access grid equipment has been designed to above-mentioned manual, automatic multiple sideFormula, has increased the possibility of various control, in order to the in the situation that of a kind of may inefficacy by another kind of mayRealize control, ensured that better access grid equipment can safe and stable operation. Simultaneously also by establishingCount electric, intelligent control mode, for protective device of the present invention has increased Universal and scalability.
A kind of for accessing the protection of grid equipment by the embodiment of the present invention by shown in Fig. 52 belowThe circuit diagram of an instantiation of device, specifically describe hand switch control signal generative circuit 401,The circuit of the first switch controlling signal synthetic circuit 402 and second switch control signal synthetic circuit 403Figure. As shown in Figure 5, wherein dotted line frame 40 inside are divided into switch controlling signal generative circuit 40, dotted lineFrame 401 inside are divided into hand switch control signal generative circuit 401, and dotted line frame 402 inside are divided into firstSwitch controlling signal synthetic circuit 402, dotted line frame 403 inside are divided into comprehensively electricity of second switch control signalRoad 403.
Hand switch control signal generative circuit 401 comprises switch S 1 and capacitor C 1. Switch S 1 comprisesA moved end 2 and two quiet ends 1,3, in the time being placed in primary importance, moved end 2 and the first quiet end 1 are ledLogical, in the time being placed in the second place, moved end 2 and the second quiet end 3 conductings; The first quiet end 1 and power end+5VConnect, the second quiet end 3 is connected with earth terminal GND, moved end 2 and the first switch controlling signal synthetic circuit402 input connects; Capacitor C 1 is connected across between the first quiet end 1 and the second quiet end 3 of switch S 1.
The first switch controlling signal synthetic circuit 402 adopts gate circuit to realize, concrete real as oneExample, as shown in Figure 5, it adopts OR circuit to realize, comprise first or door chip U2B, first orThe input 4 of door chip U2B is connected with the output 2 of switch S 1, and its input 5 is for receiving intelligenceCan switch controlling signal, first or a door chip U2B hand switch control signal generative circuit 401 is exportedHand switch control signal and this intelligent switching control signal ask or export, its output 6 and second is openedThe input that closes control signal synthetic circuit 403 connects.
Second switch control signal synthetic circuit 403 adopts gate circuit to realize, concrete real as oneExample, as shown in Figure 5, it adopts OR circuit to realize, comprise second or door chip U2C, second orThe input 9 of door chip U2C is connected with first or the output 6 of a chip U2B, its input 10Be used for receiving electric switch control signal QD_Switch_Lock, second or door chip U2C by first orSignal and this electric switch control signal QD_Switch_Lock of door chip U2B output ask or export,Its output 8 is connected with locking signal generative circuit 50, output integrated switch controlling signal CONTROL.Wherein, hand switch control signal, intelligent switching control signal and electric switch control signal are all low electricityPut down as normal run signal, high level is fault-signal. It will be appreciated by those skilled in the art that above-mentionedOne switch controlling signal synthetic circuit 402 and second switch control signal synthetic circuit 403 are not limited to by schemingEmploying OR circuit shown in 5 is realized, and also can adopt and for example also comprise and door, not gate and XOR gateRealize in one or more the composite door circuit in other gate circuits.
The a kind of for accessing the protective device of grid equipment of the embodiment of the present invention 2 will be specifically described belowAn instantiation cross current feedback circuit 10, drive error feedback circuit 20, fault feedback circuit30, locking signal generative circuit 50, failure indicating circuit 60 and electrical control signal generative circuit 70Circuit diagram. As shown in Figure 5, dotted line frame 10 inside were divided into current feedback circuit 10, dotted line frame 20Inside is divided into drive error feedback circuit 20, and dotted line frame 30 inside are divided into fault feedback circuit 30, dotted lineFrame 50 inside are divided into locking signal generative circuit 50, and dotted line frame 60 inside are divided into failure indicating circuit 60,Dotted line frame 70 inside are divided into electrical control signal generative circuit 70.
Crossing current feedback circuit 10, drive error feedback circuit 20 and fault feedback circuit 30 all can adoptGate circuit is realized, and as an instantiation, as shown in Figure 5, it all adopts AND circuit to realize,Cross current feedback circuit 10 comprise first with a door chip U1A, A/B/C three-phase over-current signal OCA, OCB,OCC is asked and the comprehensive comprehensive over-current signal OC of one-tenth with door chip U1A by first. Drive error feedback circuit20 comprise second with a door chip U1B, A/B/C three-phase drive rub-out signal ERRA, ERRB, ERRC quiltSecond asks and the comprehensive comprehensive drive error signal ERR of one-tenth with door chip U1B. Fault feedback circuit 30 wrapsDraw together the 3rd with a door chip U3A, the mistake of comprehensive over-current signal OC, comprehensive drive error signal ERR, IGBTThe excess temperature signal OH that presses signal OV and IGBT by the 3rd with a chip U3A ask with comprehensive become resultant faultSignal FAULT, exports to locking signal generative circuit 50, wherein, and A/B/C three-phase over-current signal, A/B/CThe overvoltage signal of three-phase drive rub-out signal, IGBT and the excess temperature signal of IGBT are all that high level is normalRun signal, low level is fault-signal. It will be appreciated by those skilled in the art that above-mentioned overcurrent feedback electricityRoad 10, drive error feedback circuit 20 and fault feedback circuit 30 are not limited to employing as shown in Figure 5AND circuit is realized, and also can adopt and for example also comprise or other gate circuits such as door, not gate and XOR gateIn one or more composite door circuit realize.
Locking signal generative circuit 50 comprises the 3rd or door chip U2A, the first resistance R 1, the second resistanceR2, the first LED 1 and the first triode Q1, the 3rd or the first input of door chip U2AEnd 1 is connected with the output of fault feedback circuit 30, and its second input 2 is raw with switch controlling signalBecome the output of circuit 40 to connect, its output 3 is connected with one end of the first resistance R 1; The first resistanceThe other end of R1 is connected with the base stage 1 of the first triode Q1; The emitter stage 2 of the first triode Q1 withEarth terminal GND connects, and its colelctor electrode 3 is connected with one end of the first LED 1; FirstThe other end of optical diode LED1 is connected with one end of the second resistance R 2; The other end of the second resistance R 2Be connected with power end+5V; The colelctor electrode 3 of the first triode Q1 is the output of locking signal LOCK.The 3rd or door chip U2A by resultant fault signal FAULT and group switch control signal CONTROL asks orOutput offers the first triode Q1, forms afterwards locking signal LOCK and exports to access grid equipmentMicrocontroller, to control the power on/off of access grid equipment, locking signal LOCK is low level fault,High level is normal. The first LED 1 is for locking signal instruction, and while normally operation, lamp goes out,When fault, lamp is bright. It will be appreciated by those skilled in the art that above-mentioned locking signal generative circuit 50 is not limited toCircuit diagram is as shown in Figure 5 realized, and also can adopt other circuit to realize the merit that produces control signalCan, to achieve a butt joint into the control of grid equipment break-make.
Failure indicating circuit 60 comprises three-phase over current fault indicating circuit, the instruction of three-phase drive faultCircuit, IGBT overvoltage failure indicating circuit and IGBT excess temperature failure indicating circuit. Three-phase over current fault refers toShow that circuit comprises the second LED 2 and the 3rd resistance R 3, the second LEDs 2One end is connected with the output of crossing current feedback circuit 10, and the other end is connected with one end of the 3rd resistance R 3;The other end of the 3rd resistance R 3 is connected with power end+5V. Three-phase drive fault indicating circuit comprisesOne end and the driving of the 3rd LED 3 and the 4th resistance R 4, the three LEDs 3The output of error feedback circuit 20 connects, and the other end is connected with one end of the 4th resistance R 4; The 4th electricityThe other end of resistance R4 is connected with power end+5V. IGBT overvoltage failure indicating circuit comprises the 4th luminous twoOne end input of utmost point pipe LED4 and the 5th resistance R 5, the four LEDs 4 is from access electrical networkThe overvoltage signal of the IGBT of the holding circuit of the high-power IGBT module in equipment, the other end and the 5th electricityOne end of resistance R5 connects; The other end of the 5th resistance R 5 is connected with power end+5V. IGBT excess temperature faultIndicating circuit comprises the 5th LED 5 and the 6th resistance R 6, the five LEDs 5One end input from the IGBT excess temperature of the holding circuit of the high-power IGBT module in access grid equipmentSignal, the other end is connected with one end of the 6th resistance R 6; The other end of the 6th resistance R 6 and power end+5VConnect. It will be appreciated by those skilled in the art that above-mentioned failure indicating circuit 60 is not limited to as shown in Figure 5Circuit diagram realize, also can adopt other circuit to realize the function of indicating fault.
Electrical control signal generative circuit 70 comprises the second triode Q2 and the 7th resistance R 7; The 7th electricityOne end of resistance R7 is connected with the output of fault feedback circuit 30, its other end and the second triode Q2Base stage 1 connect; The emitter stage 2 of the second triode Q2 is connected with earth terminal GND, its colelctor electrode 3For the output of electrical control signal QD_Fault. Electrical control signal generative circuit 70 is by resultant faultThe strong electrical control circuit of exporting to described access grid equipment after signal FAULT changes, also can be used forOther purposes such as panel instruction. It will be appreciated by those skilled in the art that above-mentioned electrical control signal generates electricityThe circuit with triode that road 70 is not limited to is as shown in Figure 5 realized, and also can adopt and also comprise fieldOne or more combinational circuit of other circuit such as effect pipe is realized.
In sum, the circuit simple and stable of the every part of protective device of the present invention, be easy to realize, with letterSingle current feedback circuit excessively, drive error feedback circuit, fault feedback circuit, on-off circuit, locking letterThe circuit parts such as number generative circuit, failure indicating circuit, electrical control signal generative circuit, it is right to have completedThe integrated protection of access grid equipment, has that components and parts are few, circuit is simple, good stability, safeEtc. advantage, reduce the cost of protective device, its Universal and scalability is conducive to protection of the present inventionThe marketing of device.
Obviously, above-described embodiment is only for example is clearly described, and not to embodimentRestriction. For those of ordinary skill in the field, can also do on the basis of the above descriptionGo out other multi-form variation or variation. Here without also giving thoroughly all embodimentsLift. And the apparent variation of being extended out thus or the still protection domain in the invention of variationAmong.
Claims (8)
1. for accessing a protective device for grid equipment, it is characterized in that described access grid equipmentComprise intelligent grid signal pickup assembly and IEC61850 protocol conversion apparatus, described protective device comprises:
Cross current feedback circuit, for receiving three-phase over-current signal, and generate according to described three-phase over-current signalComprehensive over-current signal;
Drive error feedback circuit, for receiving three-phase drive rub-out signal, and according to described three-phase driveRub-out signal generates comprehensive drive error signal;
Fault feedback circuit, for receive from access grid equipment high-power IGBT overvoltage signal,The excess temperature signal of described IGBT, described comprehensive over-current signal and described comprehensive drive error signal, and according toThe excess temperature signal of the overvoltage signal of described IGBT, described IGBT, described comprehensive over-current signal and described comprehensiveDrive error signal generates resultant fault signal;
Switch controlling signal generative circuit, for generating the group switch control letter of described access grid equipmentNumber; And,
Locking signal generative circuit, for receiving described resultant fault signal and described group switch control letterNumber, and export to according to described resultant fault signal and described group switch control signal generation locking signalDescribed access grid equipment, to control the power on/off of described access grid equipment;
Described switch controlling signal generative circuit comprises:
Hand switch control signal generative circuit, for generating hand switch control signal; And,
The first switch controlling signal synthetic circuit, for receiving the micro-control from described access grid equipmentThe intelligent switching control signal of device processed and described hand switch control signal, and according to described intelligent switch controlSignal processed and described hand switch control signal generate described group switch control signal.
2. protective device according to claim 1, is characterized in that, described hand switch control letterNumber generative circuit comprises switch and electric capacity; Described switch comprises a moved end and two quiet ends, when being placed inWhen one the position, described moved end and the first quiet end conducting, in the time being placed in the second place, described moved end and secondQuiet end conducting; Described the first quiet end is connected with power end, and described the second quiet end is connected with earth terminal, described inMoved end is connected with the input of described the first switch controlling signal synthetic circuit; Described in described electric capacity is connected acrossBetween the first quiet end and the second quiet end of switch.
3. protective device according to claim 1, is characterized in that, described the first switch control letterNumber synthetic circuit adopts gate circuit to realize.
4. protective device according to claim 1, is characterized in that, described current feedback circuit excessively,Described drive error feedback circuit and described fault feedback circuit all adopt gate circuit to realize.
5. according to the protective device described in claim 3 or 4, it is characterized in that, described gate circuit be or door,Circuit with the one or more combination in door, not gate and XOR gate.
6. protective device according to claim 1, is characterized in that, described locking signal generates electricityRoad comprises the 3rd or door chip, the first resistance, the second resistance, the first light emitting diode and the first triode,The described the 3rd or door chip first input end be connected with the output of described fault feedback circuit, it is second years oldInput is connected with the output of described switch controlling signal generative circuit, its output and described the first electricityOne end of resistance connects; The other end of described the first resistance is connected with the base stage of described the first triode; DescribedThe emitter stage of the first triode is connected with earth terminal, one end of its colelctor electrode and described the first light emitting diodeConnect; The other end of described the first light emitting diode is connected with one end of described the second resistance; Described secondThe other end of resistance is connected with power end; The very described locking signal of the current collection of described the first triode defeatedGo out end.
7. protective device according to claim 1, is characterized in that, described protective device also comprisesFailure indicating circuit, described failure indicating circuit comprises three-phase over current fault indicating circuit, three-phase drive mistakeMistake failure indicating circuit, IGBT overvoltage failure indicating circuit and IGBT excess temperature failure indicating circuit;
Described three-phase over current fault indicating circuit comprises the second light emitting diode and the 3rd resistance, described secondOne end of light emitting diode is connected with the described output of crossing current feedback circuit, the other end and described the 3rd electricityOne end of resistance connects; The other end of described the 3rd resistance is connected with power end;
Described three-phase drive fault indicating circuit comprises the 3rd light emitting diode and the 4th resistance, described inOne end of the 3rd light emitting diode is connected with the output of described drive error feedback circuit, the other end and instituteOne end of stating the 4th resistance connects; The other end of described the 4th resistance is connected with power end;
Described IGBT overvoltage failure indicating circuit comprises the 4th light emitting diode and the 5th resistance, the described the 4thThe overvoltage signal of described IGBT is inputted in one end of light emitting diode, one end of the other end and described the 5th resistanceConnect; The other end of described the 5th resistance is connected with power end;
Described IGBT excess temperature failure indicating circuit comprises the 5th light emitting diode and the 6th resistance, the described the 5thThe excess temperature signal of described IGBT is inputted in one end of light emitting diode, one end of the other end and described the 6th resistanceConnect; The other end of described the 6th resistance is connected with power end.
8. according to the protective device described in claim 1-4 and 6-7 any one, it is characterized in that described guarantorProtection unit also comprises electrical control signal generative circuit;
Described electrical control signal generative circuit comprises the second triode and the 7th resistance; Described the 7th resistanceOne end be connected with the output of described fault feedback circuit, the base of its other end and described the second triodeThe utmost point connects; The emitter stage of described the second triode is connected with earth terminal, the very described electrical control of its current collectionThe output of signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510689886.XA CN105337409B (en) | 2015-03-26 | 2015-03-26 | For the protection device of IEC61850 protocol conversion apparatus |
| CN201510137239.8A CN104810806B (en) | 2015-03-26 | 2015-03-26 | For accessing the protective device of grid equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510137239.8A CN104810806B (en) | 2015-03-26 | 2015-03-26 | For accessing the protective device of grid equipment |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510689886.XA Division CN105337409B (en) | 2015-03-26 | 2015-03-26 | For the protection device of IEC61850 protocol conversion apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104810806A CN104810806A (en) | 2015-07-29 |
| CN104810806B true CN104810806B (en) | 2016-06-08 |
Family
ID=53695414
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510689886.XA Active CN105337409B (en) | 2015-03-26 | 2015-03-26 | For the protection device of IEC61850 protocol conversion apparatus |
| CN201510137239.8A Active CN104810806B (en) | 2015-03-26 | 2015-03-26 | For accessing the protective device of grid equipment |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510689886.XA Active CN105337409B (en) | 2015-03-26 | 2015-03-26 | For the protection device of IEC61850 protocol conversion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN105337409B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337409B (en) * | 2015-03-26 | 2017-04-05 | 国网山东省电力公司青岛供电公司 | For the protection device of IEC61850 protocol conversion apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6097582A (en) * | 1999-02-12 | 2000-08-01 | Wisconsin Alumni Research Foundation | Short circuit protection of IGBTs and other power switching devices |
| JP2001103753A (en) * | 1999-09-29 | 2001-04-13 | Tdk Corp | Switching power supply unit |
| JP3791400B2 (en) * | 2001-11-22 | 2006-06-28 | 三菱電機株式会社 | Semiconductor device |
| CN203660869U (en) * | 2013-11-13 | 2014-06-18 | 国家电网公司 | High-power IGBT (insulated gate bipolar transistor) redundant drive protection circuit |
| CN204391694U (en) * | 2014-11-26 | 2015-06-10 | 国家电网公司 | A kind of general protective circuit for Active Power Filter-APF |
| CN105337409B (en) * | 2015-03-26 | 2017-04-05 | 国网山东省电力公司青岛供电公司 | For the protection device of IEC61850 protocol conversion apparatus |
-
2015
- 2015-03-26 CN CN201510689886.XA patent/CN105337409B/en active Active
- 2015-03-26 CN CN201510137239.8A patent/CN104810806B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105337409A (en) | 2016-02-17 |
| CN105337409B (en) | 2017-04-05 |
| CN104810806A (en) | 2015-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103904770B (en) | A kind of AC power and battery power switching control system and method | |
| CN104810806B (en) | For accessing the protective device of grid equipment | |
| CN203491708U (en) | AC-DC intelligent allocating energy-storage current commutation apparatus | |
| CN112305332B (en) | Load device for railway vehicle converter test | |
| CN207975006U (en) | driving circuit | |
| CN208369555U (en) | Skeleton symbol wall list firewire touch switch circuit | |
| CN100446141C (en) | Power supply pulse controller of breaker | |
| CN206684219U (en) | A kind of frequency converter and its voltage detecting circuit | |
| CN107702298A (en) | It is provided with the air cooler intelligent power supply control system of triggering enhancing circuit | |
| CN105634373A (en) | Oil pumping unit centralized control special-purpose inversion control device | |
| CN204360154U (en) | A kind of simple and easy distribution repairing case | |
| CN209088574U (en) | A kind of internal/external power switching circuit | |
| CN207398869U (en) | Substation Insulator living water washing robot power supply system and robot | |
| CN203722327U (en) | A bridging structure used for a high voltage direct current power supply apparatus | |
| CN208461444U (en) | The leakage protection circuit of household electrical appliance | |
| CN206211553U (en) | A kind of Anti-reflux controller for photovoltaic generating system | |
| CN104570883A (en) | Simple distribution network emergency maintenance box | |
| CN206178522U (en) | Circuit structure of restriction power | |
| CN205014243U (en) | Solar energy light fixture | |
| CN110264650A (en) | A kind of remodeling method of the compatible tradition machinery doorbell system of intelligent doorbell outdoor unit | |
| CN205491291U (en) | Light -emitting diode (LED) driving circuit | |
| CN203645902U (en) | Mini-sized grid-connected inverter and street lamp control system using the same | |
| CN220585976U (en) | Cascade multi-level inverter main control unit for energy storage | |
| CN106374426A (en) | Load power-based automatic cutoff circuit | |
| CN202633676U (en) | Intelligent socket with overvoltage protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |