CN103792505A - Ground fault simulation device for electric power direct current system - Google Patents
Ground fault simulation device for electric power direct current system Download PDFInfo
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- CN103792505A CN103792505A CN201410019750.3A CN201410019750A CN103792505A CN 103792505 A CN103792505 A CN 103792505A CN 201410019750 A CN201410019750 A CN 201410019750A CN 103792505 A CN103792505 A CN 103792505A
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Abstract
The invention relates to a ground fault simulation device for an electric power direct current system. The ground fault simulation device for the electric power direct current system comprises rotary switches SA1-SA4, resistors R1-R18, capacitors C1-C14, an adjustable transformer T and an alternating current 220V power supply GJ. The ground fault simulation device for the electric power direct current system has the advantages that complex ground faults of various types can be simulated flexibly and safely by using a direct current bus or direct current branches of a field direct current power supply system, and the ground fault simulation device is convenient to mount and operate; alternating current invasion simulation can be further carried out on the direct current bus or all the direct current branches, alternating current electricity jumping faults such as PT alternating current voltages and 380V alternating current low voltages in an electric power system can be simulated, and alternating current measuring and recording functions of an insulation monitoring device can be detected; an interlocking method is adopted by the rotary switches in the ground fault simulation device, and the safety and the reliability in the ground fault simulation process are ensured.
Description
Technical field
The invention belongs to the DC system earth fault technical field in electric system, relate to a kind of electric power DC system earth fault analogue means.
Background technology
Direct supply part in electric system is made up of equipment such as battery pack, charging equipment, direct current cabinets.Straight-flow system provides direct supply reliably in generating plant and transformer station for control, signal, relay protection, aut.eq., telecontrol communication device etc., and emergency lighting power supply is provided.It also can be operation reliable operating power is provided.Straight-flow system reliably whether, the safe operation of generating plant, transformer station is played to vital effect, be the assurance of generating plant and substation safety operation.
Generating plant, transformer station direct current system ground connection are a kind of easy generation and the fault larger to electric system harmfulness.In DC ground fault, endangering larger is 2 ground connection, may cause serious consequence.Straight-flow system plus earth, just have the possibility that causes protective relaying maloperation, because general breaking coil (as outlet auxiliary reclay coil and breaking coil etc.) all connects power cathode, there is ground connection in loop or defective insulation will form 2 ground connection again, causes protection malfunction; Straight-flow system minus earth; if there is again one point earth in loop, forms 2 ground connection and can, by trip(ping) circuit or closing circuit short circuit, cause relay protection, signal, aut.eq. malfunction or tripping; or cause DC insurance fusing, make protection and aut.eq., control loop lose power supply.2 ground connection of homopolarity in complicated protection loop, also may, by some relay short circuit, can not trip and cause protection tripping, cause overstep tripping.
In order to guarantee the safe and reliable operation of DC power system, Insulation Inspection Device for Direct-Current System must be installed, the insulation against ground state of Real-Time Monitoring DC power system, and the monitoring accuracy of insulation monitoring and warning device and reliability need earth fault analogue means to test.By earth fault analogue means, various earth fault is simulated, can be tested out can whether Insulation Inspection Device for Direct-Current System can normally work and arrive DC ground fault branch road by monitor.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of electric power DC system earth fault analogue means that can simulate the ground-fault condition of different direct current branch, different insulative degree.
For solving the problems of the technologies described above adopted technical scheme be: a kind of electric power DC system earth fault analogue means, comprises rotary switch SA1-SA4, resistance R 1-R18, capacitor C 1-C14, transtat T and alternating current 220V power supply GJ;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA1 is moving contact 2-12 pin, and its other end is that the resistance insulation of electric power DC system earth fault analogue means is simulated anodal RZ;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA1 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 1; The other end ground connection of described resistance R 1;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 2; The other end ground connection of described resistance R 2;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 3; The other end ground connection of described resistance R 3;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 4; The other end ground connection of described resistance R 4;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 5; The other end ground connection of described resistance R 5;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 6; The other end ground connection of described resistance R 6;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 7; The other end ground connection of described resistance R 7;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 8; The other end ground connection of described resistance R 8;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 9; The other end ground connection of described resistance R 1;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA1; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA1 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA1 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA2 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA1 are all unsettled;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA2 is moving contact 2-12 pin, and its other end is the resistance insulation simulation negative pole RF of described electric power DC system earth fault analogue means;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA2 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 10; The other end ground connection of described resistance R 10;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 11; The other end ground connection of described resistance R 11;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 12; The other end ground connection of described resistance R 12;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 13; The other end ground connection of described resistance R 13;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 14; The other end ground connection of described resistance R 14;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 15; The other end ground connection of described resistance R 15;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 16; The other end ground connection of described resistance R 16;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 17; The other end ground connection of described resistance R 17;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 18; The other end ground connection of described resistance R 18;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA2; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA2 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA2 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA1 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA2 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA3 is moving contact 1-12 pin, and its other end is that the capacitive insulation of described electric power DC system earth fault analogue means is simulated anodal CZ;
The 1st stationary contact 1-1 pin of the 1st layer of patching panel of described rotary switch SA3 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 1; The other end ground connection of described resistance C1;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 2; The other end ground connection of described capacitor C 2;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 3; The other end ground connection of described capacitor C 3;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 4; The other end ground connection of described capacitor C 4;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 5; The other end ground connection of described capacitor C 5;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 6; The other end ground connection of described capacitor C 6;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 7; The other end ground connection of described capacitor C 7;
All contacts of the layer 2-3 patching panel of described rotary switch SA3 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA4 is moving contact 1-12 pin, and its other end is the capacitive insulation simulation negative pole CF of described electric power DC system earth fault analogue means;
The 1st stationary contact 1-1 pin of described rotary switch SA4 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 8; The other end ground connection of described resistance C8;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 9; The other end ground connection of described capacitor C 9;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 10; The other end ground connection of described capacitor C 10;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 11; The other end ground connection of described capacitor C 11;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 12; The other end ground connection of described capacitor C 12;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 13; The other end ground connection of described capacitor C 13;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 14; The other end ground connection of described capacitor C 14;
All contacts of the layer 2-3 patching panel of described rotary switch SA4 are all unsettled;
Described in one termination of described transtat T output terminal, voltage output end, other end ground connection are invaded in the interchange of electric power DC system earth fault analogue means; The input termination 220V AC power GJ of described transtat T.
The model of described rotary switch SA1-SA4 is KC211-W3D; The model of described transtat is TDGC2-0.5.
Described resistance R 1 is 200K with R10; Described resistance R 2 is 100K with resistance R 11; Described resistance R 3 is 75K with R12; Described resistance R 4 is 60K with R13; Described resistance R 5 is 50K with R14; Described resistance R 6 is 30K with R15; Described resistance R 7 is 25K with R16; Described resistance R 8 is 20K with R17; Described resistance R 9 is 10K with R18.
Described capacitor C 1 and capacitor C 8 are 100uf; Described capacitor C 2 and capacitor C 9 are 60uf; Described capacitor C 3 and capacitor C 10 are 20uf; Described capacitor C 4 and capacitor C 11 are 10uf; Described capacitor C 5 and capacitor C 12 are 5uf; Described capacitor C 6 and capacitor C 13 are 2uf; Described capacitor C 7 and capacitor C 14 are 1uf.
Beneficial effect of the present invention is as follows:
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the annexation block diagram of the present invention and DC bus and insulation monitoring and warning device.
Embodiment
From the embodiment shown in Fig. 1-2, the present embodiment comprises rotary switch SA1-SA4, resistance R 1-R18, capacitor C 1-C14, transtat T and alternating current 220V power supply GJ;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA1 is moving contact 2-12 pin, and its other end is that the resistance insulation of electric power DC system earth fault analogue means is simulated anodal RZ;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA1 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 1; The other end ground connection of described resistance R 1;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 2; The other end ground connection of described resistance R 2;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 3; The other end ground connection of described resistance R 3;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 4; The other end ground connection of described resistance R 4;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 5; The other end ground connection of described resistance R 5;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 6; The other end ground connection of described resistance R 6;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 7; The other end ground connection of described resistance R 7;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 8; The other end ground connection of described resistance R 8;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 9; The other end ground connection of described resistance R 1;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA1; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA1 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA1 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA2 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA1 are all unsettled;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA2 is moving contact 2-12 pin, and its other end is the resistance insulation simulation negative pole RF of described electric power DC system earth fault analogue means;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA2 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 10; The other end ground connection of described resistance R 10;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 11; The other end ground connection of described resistance R 11;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 12; The other end ground connection of described resistance R 12;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 13; The other end ground connection of described resistance R 13;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 14; The other end ground connection of described resistance R 14;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 15; The other end ground connection of described resistance R 15;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 16; The other end ground connection of described resistance R 16;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 17; The other end ground connection of described resistance R 17;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 18; The other end ground connection of described resistance R 18;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA2; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA2 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA2 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA1 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA2 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA3 is moving contact 1-12 pin, and its other end is that the capacitive insulation of described electric power DC system earth fault analogue means is simulated anodal CZ;
The 1st stationary contact 1-1 pin of the 1st layer of patching panel of described rotary switch SA3 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 1; The other end ground connection of described resistance C1;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 2; The other end ground connection of described capacitor C 2;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 3; The other end ground connection of described capacitor C 3;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 4; The other end ground connection of described capacitor C 4;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 5; The other end ground connection of described capacitor C 5;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 6; The other end ground connection of described capacitor C 6;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 7; The other end ground connection of described capacitor C 7;
All contacts of the layer 2-3 patching panel of described rotary switch SA3 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA4 is moving contact 1-12 pin, and its other end is the capacitive insulation simulation negative pole CF of described electric power DC system earth fault analogue means;
The 1st stationary contact 1-1 pin of described rotary switch SA4 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 8; The other end ground connection of described resistance C8;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 9; The other end ground connection of described capacitor C 9;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 10; The other end ground connection of described capacitor C 10;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 11; The other end ground connection of described capacitor C 11;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 12; The other end ground connection of described capacitor C 12;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 13; The other end ground connection of described capacitor C 13;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 14; The other end ground connection of described capacitor C 14;
All contacts of the layer 2-3 patching panel of described rotary switch SA4 are all unsettled;
Described in one termination of described transtat T output terminal, voltage output end, other end ground connection are invaded in the interchange of electric power DC system earth fault analogue means; The input termination 220V AC power GJ of described transtat T.
The model of described rotary switch SA1-SA4 is KC211-W3D; The model of described transtat is TDGC2-0.5.
Described resistance R 1 is 200K with R10; Described resistance R 2 is 100K with resistance R 11; Described resistance R 3 is 75K with R12; Described resistance R 4 is 60K with R13; Described resistance R 5 is 50K with R14; Described resistance R 6 is 30K with R15; Described resistance R 7 is 25K with R16; Described resistance R 8 is 20K with R17; Described resistance R 9 is 10K with R18.
Described capacitor C 1 and capacitor C 8 are 100uf; Described capacitor C 2 and capacitor C 9 are 60uf; Described capacitor C 3 and capacitor C 10 are 20uf; Described capacitor C 4 and capacitor C 11 are 10uf; Described capacitor C 5 and capacitor C 12 are 5uf; Described capacitor C 6 and capacitor C 13 are 2uf; Described capacitor C 7 and capacitor C 14 are 1uf.
1-1,1-2,1-3,1-4,1-5,1-6,1-7,1-8,1-9, the 1-10 pin of the 1st layer of patching panel of rotary switch SA1 and rotary switch SA2 are all shorted to the earth.
The 1-11 pin (short circuit gear) of the 1st layer of patching panel of rotary switch SA1 and rotary switch SA2 is unsettled, does not connect any circuit.
The realization of interlocking: in the time that rotary switch (positive pole) and rotary switch (negative pole) push " short circuit " gear simultaneously, the circuit that branch road is anodal to be formed " the 1-11 pin of 1-12 pin → driver plate moving contact → rotary switch SA2 of 2-11 wiring pin → rotary switch SA2 of 2-12 wiring pin (link pin) → driver plate moving contact → rotary switch SA1 of the anodal RZ → rotary switch SA1 of branch road ", the 1-11 pin of rotary switch SA2 is unsettled, so anodal circuit and the earth forming of branch road disconnects, and do not form loop with the earth.The circuit that branch road negative pole forms is identical with branch road positive pole, also disconnects with the earth.Like this, though the situation of shorted to earth while just having guaranteed that the rotary switch of branch road both positive and negative polarity pushes " shorted to earth " gear simultaneously and also branch road positive and negative electrodes in same can not occur, thus in earth fault simulation process, guarantee the safety of DC power system.
The course of work of the present invention is as follows: resistance insulation simulation is that DC bus or branch road are passed through to resistance eutral grounding, and capacitive insulation simulation is that DC bus or branch road are passed through to resistance eutral grounding; Powerstat converts the 220V alternating voltage of input to adjustable interchange and invades voltage, and this interchange is invaded to voltage is injected into DC bus or each branch road can be invaded fault by analog AC.
1, exchange and invade simulation process
220V AC power is received to transtat T, then transtat fan-out is connected to DC bus or the direct current branch that will carry out earth fault simulation, regulate transtat T to export required interchange and invade voltage, exchange like this intrusion voltage and be just injected in DC bus or branch road, realize and exchange the simulation of invading.It should be noted that to inject to exchange to DC bus or the positive and negative the two poles of the earth of branch road simultaneously and invade voltage and simulate.
2, resistance insulation simulation process
First the positive pole of direct current branch is connect to " resistance insulation simulation " positive pole, direct current branch negative pole connects " resistance insulation simulation " negative pole.
In the time that direct current branch positive pole is received " resistance insulation simulation " positive pole, select 2-1 pin, 2-2 pin, 2-3 pin, 2-4 pin, 2-5 pin, 2-6 pin, 2-7 pin, 2-8 pin, 2-9 pin, 2-10 pin or 2-11 pin by knob switch S A1.(1) while selecting 2-1 pin, be " insulation is normal " gear, direct current branch disconnects with ground, therefore insulate over the ground, (2) select corresponding gear in 2-2 pin, 2-3 pin, 2-4 pin, 2-5 pin, 2-6 pin, 2-7 pin, 2-8 pin, 2-9 pin, 2-10 pin, direct current branch is by corresponding resistance eutral grounding, and anodal branch road has just been realized earth fault simulation in various degree, (3) while selecting 2-11 pin, be " short circuit " gear, if what " resistance insulation simulation " negative pole rotary switch SA2 selected is certain gear in corresponding gear in its 2-2 pin, 2-3 pin, 2-4 pin, 2-5 pin, 2-6 pin, 2-7 pin, 2-8 pin, 2-9 pin, 2-10 pin, the anodal shorted to earth of branch road, if " resistance insulation simulation " negative pole rotary switch and " resistance insulation simulation " anodal rotary switch are in " short circuit " shelves simultaneously, now branch road both positive and negative polarity is all off state over the ground, can not realize the simulation of shorted to earth, because carried out interlock process in rotary switch SA1 and rotary switch SA2, therefore, branch road situation anodal and negative pole while shorted to earth there will not be in earth fault analogue unit, now branch road both positive and negative polarity is in fact all the state opening circuit over the ground, and the situation of shorted to earth while there will not be branch road positive and negative electrodes in same, thereby the generation of the unsafe condition of shorted to earth while having prevented DC power system positive and negative electrodes in same.
3, capacitive insulation simulation process
First the positive pole of direct current branch is connect to " capacitive insulation simulation " positive pole, direct current branch negative pole connects " capacitive insulation simulation " negative pole.
Select 1-1 pin, 1-2 pin, 1-3 pin, 1-4 pin, 1-5 pin, 1-6 pin, 1-7 pin, 1-8 pin by knob switch S A3.(1) while selecting 1-1 pin, be " insulation is normal " gear, direct current branch disconnects with ground, therefore insulate over the ground; (2) select 1-2 pin, 1-3 pin, 1-4 pin, 1-5 pin, 1-6 pin, 1-7 pin, 1-8 pin gear, direct current branch is by corresponding capacity earth, and anodal branch road has just been realized the fault simulation by capacity earth.
In like manner, direct current branch negative pole is similar by the fault simulation of capacity earth by fault simulation implementation method and the above-mentioned anodal branch road of capacity earth, does not repeat them here.
The situation of direct current branch negative pole shorted to earth once is only described, in the time that branch road negative pole is received " capacitive insulation simulation " negative pole and rotary switch SA2 and is rotated to " short circuit " shelves, if what " resistance insulation simulation " anodal rotary switch SA1 selected is certain gear in 2-1 pin, 2-2 pin, 2-3 pin, 2-4 pin, 2-5 pin, 2-6 pin, 2-7 pin, 2-8 pin, 2-9 pin, 2-10 pin, branch road negative pole shorted to earth; If " resistance insulation simulation " negative pole rotary switch SA2 and " resistance insulation simulation " anodal rotary switch SA1 select 2-11 pin simultaneously, when it is in " short circuit " shelves simultaneously, now branch road both positive and negative polarity is all off state over the ground, can not realize the simulation of shorted to earth.
Resistance insulation simulation and capacitive insulation simulation can be arranged in pairs or groups mutually, and the negative or positive electrode of direct current branch can pass through resistance eutral grounding, realize resistance insulation simulation, and another extremely can pass through capacity earth, realizes capacitive insulation simulation.
It should be noted that, same extremely in, select resistance insulation when simulation, capacitive insulation is simulated corresponding rotary switch should rotate to " insulation is normal " shelves, if select capacitive insulation simulation, resistance insulation is simulated corresponding rotary switch and should be rotated to " insulation is normal " shelves.
After earth fault has been simulated, Insulation Inspection Device for Direct-Current System will monitor earth fault, and the fault branch monitoring and malfunction is shown on screen to the alarm of simultaneously breaking down.
Claims (4)
1. an electric power DC system earth fault analogue means, is characterized in that: comprise rotary switch SA1-SA4, resistance R 1-R18, capacitor C 1-C14, transtat T and alternating current 220V power supply GJ;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA1 is moving contact 2-12 pin, and its other end is that the resistance insulation of electric power DC system earth fault analogue means is simulated anodal RZ;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA1 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 1; The other end ground connection of described resistance R 1;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 2; The other end ground connection of described resistance R 2;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 3; The other end ground connection of described resistance R 3;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 4; The other end ground connection of described resistance R 4;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 5; The other end ground connection of described resistance R 5;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 6; The other end ground connection of described resistance R 6;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 7; The other end ground connection of described resistance R 7;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 8; The other end ground connection of described resistance R 8;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA1 the layer of patching panel described in one termination of described resistance R 9; The other end ground connection of described resistance R 1;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA1; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA1 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA1 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA2 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA1 are all unsettled;
One end of the 2nd layer of patching panel swing arm of described rotary switch SA2 is moving contact 2-12 pin, and its other end is the resistance insulation simulation negative pole RF of described electric power DC system earth fault analogue means;
The 1st stationary contact 2-1 pin of the 2nd layer of patching panel of described rotary switch SA2 is unsettled;
The 2nd stationary contact 2-2 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 10; The other end ground connection of described resistance R 10;
The 2nd stationary contact 2-3 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 11; The other end ground connection of described resistance R 11;
The 4th stationary contact 2-4 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 12; The other end ground connection of described resistance R 12;
The 5th stationary contact 2-5 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 13; The other end ground connection of described resistance R 13;
The 6th stationary contact 2-6 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 14; The other end ground connection of described resistance R 14;
The 7th stationary contact 2-7 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 15; The other end ground connection of described resistance R 15;
The 8th stationary contact 2-8 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 16; The other end ground connection of described resistance R 16;
The 9th stationary contact 2-9 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 17; The other end ground connection of described resistance R 17;
The 10th stationary contact 2-10 pin of the 2nd of rotary switch SA2 the layer of patching panel described in one termination of described resistance R 18; The other end ground connection of described resistance R 18;
1st ~ 10 stationary contact 1-1 ~ 1-10 ground connection of the 1st layer of patching panel of described rotary switch SA2; The 11st stationary contact 1-11 of the 1st layer of patching panel of described rotary switch SA2 is unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA2 is moving contact 1-12 pin, the 11st stationary contact 2-11 pin of the 2nd layer of patching panel of rotary switch SA1 described in its another termination;
All contacts of the 3rd layer of patching panel of described rotary switch SA2 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA3 is moving contact 1-12 pin, and its other end is that the capacitive insulation of described electric power DC system earth fault analogue means is simulated anodal CZ;
The 1st stationary contact 1-1 pin of the 1st layer of patching panel of described rotary switch SA3 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 1; The other end ground connection of described resistance C1;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 2; The other end ground connection of described capacitor C 2;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 3; The other end ground connection of described capacitor C 3;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 4; The other end ground connection of described capacitor C 4;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 5; The other end ground connection of described capacitor C 5;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 6; The other end ground connection of described capacitor C 6;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA3 the layer of patching panel described in one termination of described capacitor C 7; The other end ground connection of described capacitor C 7;
All contacts of the layer 2-3 patching panel of described rotary switch SA3 are all unsettled;
One end of the 1st layer of patching panel swing arm of described rotary switch SA4 is moving contact 1-12 pin, and its other end is the capacitive insulation simulation negative pole CF of described electric power DC system earth fault analogue means;
The 1st stationary contact 1-1 pin of described rotary switch SA4 is unsettled;
The 2nd stationary contact 1-2 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 8; The other end ground connection of described resistance C8;
The 3rd stationary contact 1-3 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 9; The other end ground connection of described capacitor C 9;
The 4th stationary contact 1-4 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 10; The other end ground connection of described capacitor C 10;
The 5th stationary contact 1-5 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 11; The other end ground connection of described capacitor C 11;
The 6th stationary contact 1-6 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 12; The other end ground connection of described capacitor C 12;
The 7th stationary contact 1-7 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 13; The other end ground connection of described capacitor C 13;
The 8th stationary contact 1-8 pin of the 1st of rotary switch SA4 the layer of patching panel described in one termination of described capacitor C 14; The other end ground connection of described capacitor C 14;
All contacts of the layer 2-3 patching panel of described rotary switch SA4 are all unsettled;
Described in one termination of described transtat T output terminal, voltage output end, other end ground connection are invaded in the interchange of electric power DC system earth fault analogue means; The input termination 220V AC power GJ of described transtat T.
2. a kind of electric power DC system earth fault analogue means according to claim 1, is characterized in that: the model of described rotary switch SA1-SA4 is KC211-W3D; The model of described transtat is TDGC2-0.5.
3. a kind of electric power DC system earth fault analogue means according to claim 2, is characterized in that: described resistance R 1 is 200K with R10; Described resistance R 2 is 100K with resistance R 11; Described resistance R 3 is 75K with R12; Described resistance R 4 is 60K with R13; Described resistance R 5 is 50K with R14; Described resistance R 6 is 30K with R15; Described resistance R 7 is 25K with R16; Described resistance R 8 is 20K with R17; Described resistance R 9 is 10K with R18.
4. a kind of electric power DC system earth fault analogue means according to claim 2, is characterized in that: described capacitor C 1 and capacitor C 8 are 100uf; Described capacitor C 2 and capacitor C 9 are 60uf; Described capacitor C 3 and capacitor C 10 are 20uf; Described capacitor C 4 and capacitor C 11 are 10uf; Described capacitor C 5 and capacitor C 12 are 5uf; Described capacitor C 6 and capacitor C 13 are 2uf; Described capacitor C 7 and capacitor C 14 are 1uf.
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| CN201410019750.3A CN103792505B (en) | 2014-01-16 | 2014-01-16 | A kind of electric power DC system earth fault analog |
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| CN201410019750.3A CN103792505B (en) | 2014-01-16 | 2014-01-16 | A kind of electric power DC system earth fault analog |
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| CN103792505B CN103792505B (en) | 2016-08-17 |
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| CN110988621A (en) * | 2019-11-27 | 2020-04-10 | 国网福建省电力有限公司检修分公司 | Voltage offset simulation method for ultra-high voltage transformer substation direct current system under humid climate condition |
| CN112216173A (en) * | 2020-09-30 | 2021-01-12 | 国网冀北电力有限公司管理培训中心 | Alternating current-direct current power supply simulation system |
| CN113030780A (en) * | 2021-02-03 | 2021-06-25 | 国网浙江桐庐县供电有限公司 | Fault simulation device for direct current system of transformer substation |
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