CN203405550U - Direct current breaker on-off characteristic testing device - Google Patents
Direct current breaker on-off characteristic testing device Download PDFInfo
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- CN203405550U CN203405550U CN201320530220.6U CN201320530220U CN203405550U CN 203405550 U CN203405550 U CN 203405550U CN 201320530220 U CN201320530220 U CN 201320530220U CN 203405550 U CN203405550 U CN 203405550U
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Abstract
The utility model discloses a direct current breaker on-off characteristic testing device, and relates to the technical field of direct current breaker on-off characteristic testing. The device is provided with a host management machine which is in communication connection with a direct current breaker on-off characteristic testing module via an RS485 interface. The direct current breaker on-off characteristic testing module is composed of a data collecting unit, a control adjusting unit and a test power source module. The data collecting unit comprises a shunt, a storage recorder, a microprocessor, a keyboard and a display device. The control adjusting unit comprises a remote control relay, a time relay, an emergency stop button, a direct current contactor, parallel resistors (R1...and Rn), IGBT tubes (K1...and Kn) and an optical coupler. The test power source module comprises an AC/DC rectification module and a super-capacitor. The advantages of the device are that: a constant large current ranging from 1A to 1000A can be provided, the breaker releasing time under different short circuit currents can be tested, direct current system hidden dangers of the inconformity between the internal resistance and the dispersibility of a direct current system breaker, and unreasonable stage difference coordination can be timely discovered, and refuse-operation and miss-operation possibly existed in the direct current breaker are prevented.
Description
Technical field
The utility model relates to DC circuit breaker break-make characteristic test technical field, specifically a kind of DC circuit breaker break-make characteristic test device.
Background technology
Current DC feedback networking adopts tree structure more, and along with the development of electric power enterprise, the overload protection of electrical equipment, short-circuit protection require more and more higher to the acting characteristic of DC circuit breaker.For protection tripping or the malfunction that prevents that DC circuit breaker break-make characteristic from causing; need to test DC circuit breaker break-make characteristic; reappear the family curve of isolating switch, find in time the straight-flow system hidden danger such as DC circuit breaker dispersiveness and inconsistent, the differential cooperation of internal resistance are unreasonable.At present; the DC power system of generating plant, transformer station can design according to relevant criterion substantially; guarantee 2～4 differential; but whether the differential cooperation of DC circuit breaker of on-the-spot operation meets the requirement of selective protection; repair and maintenance personnel are not because possessing corresponding means of testing and instrument; cannot carry out verification experimental verification, this has just left hidden danger to safe operation of power system.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of DC circuit breaker break-make characteristic test device, the constant large electric current of 1～1000A can be provided, can test the circuit breaker tripping time under different short-circuit currents, thereby find in time the straight-flow system hidden danger such as straight-flow system isolating switch dispersiveness and inconsistent, the differential cooperation of internal resistance are unreasonable, tripping and the malfunction of effectively having avoided DC circuit breaker to exist.
The utility model is realized with following technical scheme: a kind of DC circuit breaker break-make characteristic test device, comprise upper managing computer, and upper managing computer connects a DC circuit breaker break-make characteristic test module by RS485 communication, described DC circuit breaker break-make characteristic test module is comprised of data acquisition unit, regulating and controlling unit and experiment power supply module, described data acquisition unit comprises shunt, stored record body, microprocessor and keyboard and display device, described regulating and controlling unit comprises banked relay, the time relay, scram button, D.C. contactor, parallel resistance R1 ... Rn, IGBT manage K1 ... Kn and optocoupler, described experiment power supply module comprises AC/DC rectification module and super capacitor, wherein, exchange the ac input end that AC220V connects AC/DC rectification module, the direct current output of AC/DC rectification module and super capacitor parallel connection are as test current source, "+" suitable for reading of the positive pole after parallel connection and isolating switch to be measured is connected, "+" of the end opening of isolating switch to be measured and "-" short circuit, "-" suitable for reading is through contact and the parallel resistance R1 of shunt and D.C. contactor ... one end of Rn is connected, parallel resistance R1 ... the corresponding series IGBT pipe of the other end K1 of Rn ... the collector of Kn, after emitter parallel connection, be connected with the negative pole of super capacitor, base stage connects AC220V AC power by the coil of D.C. contactor, form test major loop, AC220V AC power output one end is through contact and the time relay sj coil tandem of banked relay, the other end forms control loop through the contact of scram button and the time relay and the coil tandem of D.C. contactor, the AC220V AC power of control loop is connected with microprocessor in data acquisition unit by coil, the optocoupler of banked relay, microprocessor connects respectively stored record body and keyboard and display device, and the secondary output terminal of stored record body and shunt in data acquisition unit is connected.
The beneficial effects of the utility model are: 1, adopt portable construction, are applicable to the on-the-spot test of the following grade DC circuit breaker of automatic machine room and substation field rated current 63A, fuse make-break capacity and differential cooperation of ampere-second, and simple and convenient.2,, for the research of ampere-time characteristic between the superior and the subordinate of straight-flow system isolating switch coordinates verification that efficiency test detection means is provided with differential, avoided not conforming to due to differential the generation that the malfunction causing causes expansion accident conditions.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, further the utility model method is further illustrated.
Fig. 1 is the utility model theory diagram;
Fig. 2 is DC circuit breaker break-make characteristic test module principle block diagram.
In figure: 1, AC/DC rectification module, 2, super capacitor, 3, banked relay, 4, the time relay, 41, the contact of the time relay, 5, scram button, 6, shunt, 7, D.C. contactor, 8, adjustable resistance R1 ... Rn, 9, IGBT manages K1 ... Kn, 10, stored record body, 11, optocoupler, 12, microprocessor, 13, keyboard and display device.
Embodiment
As shown in Figure 1, a kind of DC circuit breaker break-make characteristic test device is connected to form by RS485 communication by upper managing computer, DC circuit breaker break-make characteristic test module two parts.DC circuit breaker break-make characteristic test device is comprised of upper managing computer and DC circuit breaker break-make characteristic test module two parts.Upper managing computer adopts high-performance industrial computer, Windows XP operating system, and keyboard, touch pad input (can circumscribed USB mouse), simple to operate, beautiful interface, all parameters are very clear; Show in real time parameters curve map and numerical value, can store many group test datas and waveform, realize the functions such as electronics file, report printing, record queries.
As shown in Figure 2, DC circuit breaker break-make characteristic test module comprises data acquisition unit, regulating and controlling unit and three functional units of experiment power supply module.Data acquisition unit is mainly comprised of shunt 6 and data stored record body 10, and responsible electric current, the real-time DC voltage of collection, record and storage of break, current data, realize the high precision collecting of electric current and voltage and the high speed of waveform is recorded; Regulating and controlling unit is operation and the delay protection part of system, by banked relay 3, the time relay 4, scram button 5, D.C. contactor 7, parallel resistance R1 ... Rn 8, IGBT manage K1 ... Kn 9 and optocoupler 11 form, connection and the delay protection of being responsible for major loop disconnect, by high-power direct current contactor and the time relay, formed, realize connection and the time delay disjunction of test major loop, and there is artificial sudden-stop function, assurance test process is safe and reliable, adjusting test measuring current, realizes constant current output simultaneously; Experiment power supply module adopts AC/DC rectification module 1 and super capacitor 2 as heavy-current discharge power supply, and the large electric current of required short time of testing experiment is provided.Concrete connected mode is as follows:
Exchange the ac input end that AC220V connects AC/DC rectification module " 1 ", direct current output and super capacitor 2 parallel connections of AC/DC rectification module, as test current source, "+" suitable for reading of the positive pole after parallel connection and isolating switch to be measured is connected, "+" of the end opening of isolating switch to be measured and "-" short circuit, "-" suitable for reading is through shunt 6 and D.C. contactor 7 and parallel resistance R1 ... one end of Rn 8 is connected, parallel resistance R1 ... the corresponding series IGBT pipe of the other end K1 of Rn 8 ... the collector of Kn9, after emitter parallel connection, be connected with the negative pole of super capacitor 2, base stage connects AC220V AC power by the coil of D.C. contactor 7, form test major loop.
AC220V AC power output one end is through the contact of banked relay 3 and the coil tandem of the time relay 4, the other end forms control loop through the contact 41 of scram button 5 and the time relay with the coil tandem of D.C. contactor 7, realizes the control to test major loop is connected and time delay disconnects; IGBT manages K1 ... Kn 9 and optocoupler 11 form constant flow regulation loop and realize measuring current constant current output; Sampling circuit is partly comprised of data memory recorder and shunt secondary, and data stored record body 10 connection 6 two output terminals of shunt and isolating switch to be measured are suitable for reading, test record ripple DC voltage and current data and waveform etc.Microprocessor 12 is cores of whole DC circuit breaker break-make characteristic test module, connect keyboard and display device 13, data stored record body 10 and optocoupler 11, realize whole test module button operation and demonstration, data acquisition, control and adjusting, by RS485 bus, connect upper managing computer simultaneously, accept the Communication Control of upper managing computer.
The course of work: operating personnel directly control microprocessor 12 by upper managing computer communication or keyboard to set up parameter, microprocessor 12 is controlled banked relay relay 3 start-up time through optocoupler 10, through the normally opened contact 41 of scram button 5 and the time relay, just controlled like this coil break-make of D.C. contactor 7, microprocessor is controlled IGBT pipe K1 through optocoupler 10 simultaneously ... the break-make of Kn is controlled parallel resistance R1 ... Rn switching regulates measuring current size, realizes constant current output; Microprocessor is connected with the shunt secondary output terminal suitable for reading of isolating switch to be measured by data stored record body 10 again, is responsible for electric current, the real-time DC voltage of collection, record and storage of break, current data.Test data can show in real time, upload upper managing computer simultaneously carry out data analysis and preservation by RS485 bus in test module display device.
Utilize existing computer technology and the communication technology, the internal discharge devices such as combining super capacitor carry out the analysis of curve recording and reconstruction to the ampere-time characteristic of DC circuit breaker, and the device of the straight-flow system hidden danger such as a kind of timely discovery DC circuit breaker dispersiveness and inconsistent, the differential cooperation of internal resistance are unreasonable is provided.Use New Type Power Devices, be easy to realize 1A～1000A and independently set constant current output, constant current accuracy is high, and load capacity is strong, for a long time steady operation.DC circuit breaker break-make characteristic test module adopts microcontroller technology, can carry out high precision measurement to isolating switch break, and measuring accuracy can reach 0.01ms.
The utility model is the ampere-second characteristic test system of DC breaker that a kind of applicable substation field is used, is easy to carry, automaticity is high; the means of testing of direct current protecting electrical equipment acting characteristic can be provided for operation power maintenance department; the acting characteristic of direct current protecting electrical equipment and differential cooperation are carried out to verification; to improve straight-flow system reliability of operation, guarantee the safe and reliable operation of electrical network.
Claims (1)
1. a DC circuit breaker break-make characteristic test device, is characterized in that: comprise upper managing computer, upper managing computer connects a DC circuit breaker break-make characteristic test module by RS485 communication, described DC circuit breaker break-make characteristic test module is comprised of data acquisition unit, regulating and controlling unit and experiment power supply module, described data acquisition unit comprises shunt (6), stored record body (10), microprocessor (12) and keyboard and display device (13), described regulating and controlling unit comprises banked relay (3), the time relay (4), scram button (5), D.C. contactor (7), parallel resistance R1 ... Rn (8), IGBT manage K1 ... Kn(9) and optocoupler (11), described experiment power supply module comprises AC/DC rectification module (1) and super capacitor (2), wherein, exchange the ac input end that AC220V connects AC/DC rectification module (1), direct current output and the super capacitor (2) of AC/DC rectification module (1) are in parallel as test current source, "+" suitable for reading of the positive pole after parallel connection and isolating switch to be measured is connected, "+" of the end opening of isolating switch to be measured and "-" short circuit, "-" suitable for reading is through contact and the parallel resistance R1 of shunt (6) and D.C. contactor (7) ... one end of Rn (8) is connected, parallel resistance R1 ... the corresponding series IGBT pipe of the other end K1 of Rn (8) ... Kn(9) collector, after emitter parallel connection, be connected with the negative pole of super capacitor (2), base stage connects AC220V AC power by the coil of D.C. contactor (7), form test major loop, AC220V AC power output one end is through contact and time relay sj (4) coil tandem of banked relay (3), the other end forms control loop through the contact (41) of scram button (5) and the time relay and the coil tandem of D.C. contactor (7), the AC220V AC power of control loop is by the coil of banked relay (3), optocoupler (11) is connected with microprocessor in data acquisition unit (12), microprocessor (12) connects respectively stored record body (10) and keyboard and display device (13), stored record body (10) is connected with the secondary output terminal of shunt in data acquisition unit (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320530220.6U CN203405550U (en) | 2013-08-28 | 2013-08-28 | Direct current breaker on-off characteristic testing device |
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| CN201320530220.6U CN203405550U (en) | 2013-08-28 | 2013-08-28 | Direct current breaker on-off characteristic testing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412259A (en) * | 2013-08-28 | 2013-11-27 | 国家电网公司 | Device for testing on-off performance of direct current breaker |
| CN106054069A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | High-voltage DC circuit breaker auxiliary circuit oscillation parameter testing device and testing method |
| CN106872891A (en) * | 2017-04-01 | 2017-06-20 | 珠海伊托科技有限公司 | The system of relay group control super capacitor electric discharge |
| CN109690722A (en) * | 2016-09-27 | 2019-04-26 | 迪尔阿扣基金两合公司 | Relay circuit system |
-
2013
- 2013-08-28 CN CN201320530220.6U patent/CN203405550U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412259A (en) * | 2013-08-28 | 2013-11-27 | 国家电网公司 | Device for testing on-off performance of direct current breaker |
| CN103412259B (en) * | 2013-08-28 | 2015-12-09 | 国家电网公司 | A kind of direct-current circuit breaker on-off characteristic test device |
| CN106054069A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | High-voltage DC circuit breaker auxiliary circuit oscillation parameter testing device and testing method |
| CN109690722A (en) * | 2016-09-27 | 2019-04-26 | 迪尔阿扣基金两合公司 | Relay circuit system |
| CN109690722B (en) * | 2016-09-27 | 2020-12-15 | 迪尔阿扣基金两合公司 | Relay circuit system |
| CN106872891A (en) * | 2017-04-01 | 2017-06-20 | 珠海伊托科技有限公司 | The system of relay group control super capacitor electric discharge |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20150828 |
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| EXPY | Termination of patent right or utility model |