CN203965613U - A kind of emulation test system of earth-fault indicator performance - Google Patents
A kind of emulation test system of earth-fault indicator performance Download PDFInfo
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- CN203965613U CN203965613U CN201420316003.1U CN201420316003U CN203965613U CN 203965613 U CN203965613 U CN 203965613U CN 201420316003 U CN201420316003 U CN 201420316003U CN 203965613 U CN203965613 U CN 203965613U
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Abstract
The utility model proposes a kind of emulation test system of earth-fault indicator performance, belong to electrical power distribution system field.Signature waveform during by real simulation distribution generation singlephase earth fault, detects the performance of fault detector.Its structure is as follows: distribution mathematic simulated mode is connected with digital signal transmission, conversion and multiplying arrangement, the terminal 1,2,3 of digital signal transmission, conversion and multiplying arrangement is exported respectively two current signals and a voltage signal, current signal connects respectively up-flow coil separately, voltage signal is also connected respectively on two up-flow coils after step-up transformer, stepup transformer ground connection, oscillograph is connected with voltage, current signal, and fault detector is arranged on up-flow coil.The utility model can improve reliability and accuracy that action performance of failure indicator is detected, and can also detect the faulty action preventing function of indicator simultaneously.
Description
Technical field
The utility model relates to distribution network failure pointer detection technical field, particularly relates to a kind of emulation test system of earth-fault indicator performance.
Background technology
Fault detector is applied in power distribution network, can be short-circuited or fast detecting and location fault when earth fault at distribution line, reduces power off time and power failure range.For providing, the safe operation of power distribution network provides powerful support for.Therefore fault detector system is widely used in China.
Whether accurately and reliably fault detector, before putting into operation, must detect its performance.But because singlephase earth fault is complicated and changeable, fault signature is not obvious, the simulation of singlephase earth fault also neither one is unified to characteristic parameter as standard, so the performance of earth-fault indicator is detected accurately and reliably and still belongs to a difficult problem.
At present, the pick-up unit of more existing earth-fault indicator performances.These devices are all the large small frequencies etc. of adjusting fault waveform by simple control, but the real fault waveform of the waveform of simulating out and circuit has a long way to go, to the detection of fault indicator performance whether accurately and reliably can not ensure so apply these technology.
Utility model content
The deficiency that the utility model exists for prior art, a kind of emulation test system of earth-fault indicator performance has been proposed, it can real simulation distribution generation singlephase earth fault signature waveform, reflect abundanter transient fault characteristic quantity, improve reliability and accuracy to action performance of failure indicator.
A kind of emulation test system of earth-fault indicator performance, the utility model is characterised in that, described system architecture is as follows: distribution mathematic simulated mode and digital signal transmission, transform and be connected with multiplying arrangement, digital signal transmission, the terminal 1 of conversion and multiplying arrangement, 2, 3 export respectively two current signals and a voltage signal, current signal connects respectively up-flow coil separately, voltage signal is also connected respectively on two up-flow coils after step-up transformer, step-up transformer ground connection, oscillograph and voltage, current signal connects, fault detector is arranged on up-flow coil.
The structure of the transmission of the utility model digital signal, conversion and multiplying arrangement comprises: single-chip microcomputer and signal conversion amplification module and connection terminal; Exportable two current signals of described connection terminal 1,2, connection terminal 3 is exported a voltage signal; One, described electric current letter is healthy phases zero sequence current signal, and another is fault phase zero sequence current signal; Described voltage signal is fault phase voltage-to-ground signal.
Oscillograph described in the utility model accesses zero sequence current signal and the fault phase voltage-to-ground signal of fault phase simultaneously.
The utility model also comprises linked switch, and described linked switch one end is connected with the connection terminal of described digital signal transmission, conversion and multiplying arrangement, and the other end is connected with described up-flow coil, step-up transformer.
Described distribution mathematic simulated mode is: according to actual distribution network systems, set up the mathematical model of corresponding multipoint line with computing machine advanced language programming, flexibly changing grid structure and the trouble spot that diverse location is set.Can obtain voltage, the current waveform of fault phase and healthy phases, and waveform can reflect abundant transient fault characteristic quantity simultaneously.
Described digital signal transmission, conversion and multiplying arrangement adopt parallel port and computing machine to communicate, and comprise single-chip microcomputer and signal conversion amplification module and connection terminal.Exportable two current signals of described connection terminal and a voltage signal.One of described current signal is fault phase zero sequence current signal, and another is healthy phases zero sequence current signal.Described voltage signal is fault phase voltage-to-ground signal.
Described oscillograph accesses zero sequence current signal and the fault phase voltage-to-ground of fault phase simultaneously, carrys out detection failure voltage, whether current waveform meets test request, and waveform is carried out to record.
Described linked switch one end is connected with the connection terminal of described digital signal transmission, conversion and multiplying arrangement, and the other end is connected with described up-flow coil, step-up transformer.In the time that the waveform of oscilloscope display reaches test request, closed linked switch is exported voltage, electric current simultaneously, avoids electric current and voltage sequential asynchronous.
Described up-flow coil further raises to simulation current waveform out, reaches test request.Described step-up transformer further raises to simulation voltage out, reaches test request.
The described fault detector being arranged on up-flow coil, one is arranged on the up-flow coil that flows through fault phase electric current, another is arranged on the up-flow coil that flows through healthy phases electric current, can detect like this Earth Fault Detection function of earth detector and the faulty action preventing function of healthy phases simultaneously.
Compared with prior art, the beneficial effects of the utility model are:
(1) can change flexibly line network shelf structure, obtain the fault phase of (as not equal in neutral grounding mode) under different running method and the signature waveform of healthy phases, strengthen the accuracy rate confidence level to earth-fault indicator Performance Detection;
(2) waveform that utilizes mathematical model simulation to simulate is out truer, and transient fault characteristic quantity is abundant, and measuring accuracy is higher;
(3) the utility model can detect the Earth Fault Detection function of earth detector and the faulty action preventing function of healthy phases simultaneously, reduces the detection time of fault detector overall performance, raises the efficiency;
(4) technology that the utility model adopts can provide reference frame for the formulation of fault indicator performance detection method specification, simultaneously the technical requirement of specification fault detector product.
Brief description of the drawings
Fig. 1 is the elementary diagram of the emulation test system of earth-fault indicator performance;
Fig. 2 is the internal structure figure of digital signal transmission, conversion and multiplying arrangement.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
As shown in Figure 1, a kind of emulation test system of earth-fault indicator performance, the utility model is characterised in that, described system architecture is as follows: distribution mathematic simulated mode and digital signal transmission, transform and be connected with multiplying arrangement, digital signal transmission, the terminal 1 of conversion and multiplying arrangement, 2, 3 export respectively two current signals and a voltage signal, current signal connects respectively up-flow coil separately, voltage signal is also connected respectively on two up-flow coils after step-up transformer, step-up transformer ground connection, oscillograph and voltage, current signal connects, fault detector is arranged on up-flow coil.
The utility model distribution mathematic simulated mode is the mathematical model with many branched lines of computing machine advanced language programming foundation, flexibly changing grid structure and the trouble spot that diverse location is set.
The structure of the transmission of the utility model digital signal, conversion and multiplying arrangement comprises: single-chip microcomputer and signal conversion amplification module and connection terminal; Exportable two current signals of described connection terminal 1,2, connection terminal 3 is exported a voltage signal; One of described current signal is healthy phases zero sequence current signal, and another is fault phase zero sequence current signal; Described voltage signal is fault phase voltage-to-ground signal.
Oscillograph described in the utility model accesses zero sequence current signal and the fault phase voltage-to-ground signal of fault phase simultaneously.
The utility model also comprises linked switch, and described linked switch one end is connected with the connection terminal of described digital signal transmission, conversion and multiplying arrangement, and the other end is connected with described up-flow coil, step-up transformer.
As shown in Figure 2, digital signal transmission, conversion and multiplying arrangement structure: parallel interface and computing machine communicate, single-chip microcomputer is connected with signal conversion amplification module, then is connected with connection terminal.Wherein single-chip microcomputer is used for coordinating and managing communication and signal conversion module.
According to the testing requirement to earth-fault indicator performance, first determine the power distribution network wiring diagram of the present embodiment, then set up on this basis corresponding mathematical model, and suitable Single-phase Ground Connection Failure is set, programme with computer advanced language.The digital signal of output, through digital signal transmission, conversion and multiplying arrangement, finally obtains voltage, the current analog characteristic signal of certain numerical value.Now above-mentioned linked switch disconnects, and in observation oscilloscope, whether the waveform of fault phase electric current and voltage-to-ground is correct, meets test request.If do not meet test request, to the mathematical model debugging of modifying of setting up; If requirement is closed in symbol test, can carry out next step operation.
Obtaining after satisfactory signature waveform, closed linked switch, fault phase electric current and healthy phases electric current, respectively through the amplification of up-flow coil separately, further improve output current, reach real distribution line failure electric current and load current level; Fault phase voltage-to-ground, through the amplification of step-up transformer, further improves voltage, reaches real distribution circuit electric voltage grade.
Be arranged on two fault detectors on up-flow coil and measure electric current and the voltage-to-ground of up-flow coil, see whether respectively correct operation of fault detector.If the indicator being arranged on the up-flow coil that flows through fault phase electric current sends the instruction of reporting to the police; The indicator being arranged on the up-flow coil that flows through healthy phases electric current does not send the instruction of reporting to the police, and can judge all indicating corrects of two indicators.Oscillograph can be recorded the waveform of false voltage, electric current simultaneously.
The emulation test system of the utility model earth-fault indicator performance can detect the Earth Fault Detection function of earth detector and the faulty action preventing function of healthy phases simultaneously, therefore can shorten the fault detector whole detection time.Distribution mathematic simulated mode can record and preserve the various data in test process, the experimental analysis after being convenient to.Test result more accurately and reliably.
Claims (4)
1. the emulation test system of an earth-fault indicator performance, it is characterized in that, system architecture is as follows: distribution mathematic simulated mode is connected with digital signal transmission, conversion and multiplying arrangement, the terminal 1,2,3 of digital signal transmission, conversion and multiplying arrangement is exported respectively two current signals and a voltage signal, current signal connects respectively up-flow coil separately, voltage signal is also connected respectively on two up-flow coils after step-up transformer, step-up transformer ground connection, oscillograph is connected with voltage, current signal, and fault detector is arranged on up-flow coil.
2. the emulation test system of a kind of earth-fault indicator performance according to claim 1, is characterized in that, the structure of digital signal transmission, conversion and multiplying arrangement comprises: single-chip microcomputer and signal conversion amplification module and connection terminal; Two current signals of connection terminal 1,2 outputs, connection terminal 3 is exported a voltage signal; One, electric current letter is healthy phases zero sequence current signal, and another is fault phase zero sequence current signal; Voltage signal is fault phase voltage-to-ground signal.
3. the emulation test system of a kind of earth-fault indicator performance according to claim 1, is characterized in that, described oscillograph accesses zero sequence current signal and the fault phase voltage-to-ground signal of fault phase simultaneously.
4. the emulation test system of a kind of earth-fault indicator performance according to claim 1, it is characterized in that, also comprise linked switch, linked switch one end is connected with the connection terminal of digital signal transmission, conversion and multiplying arrangement, and the other end is connected with up-flow coil, step-up transformer.
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| CN201420316003.1U CN203965613U (en) | 2014-06-13 | 2014-06-13 | A kind of emulation test system of earth-fault indicator performance |
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| CN201420316003.1U CN203965613U (en) | 2014-06-13 | 2014-06-13 | A kind of emulation test system of earth-fault indicator performance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483643A (en) * | 2014-11-27 | 2015-04-01 | 华中科技大学 | Modeling method based on detection platform of fault indicator for physical simulation of power distribution network |
| CN105116360A (en) * | 2015-10-14 | 2015-12-02 | 国家电网公司 | ADPSS (advanced digital power system simulator) based test system for low current grounding line selector and test method of system |
| CN105866720A (en) * | 2016-05-23 | 2016-08-17 | 国网浙江省电力公司紧水滩水力发电厂 | Fault simulation device for direct-current system |
| CN106093820A (en) * | 2016-06-21 | 2016-11-09 | 国家电网公司 | The Performance Test System of distribution line failure positioner and method |
| CN108226843A (en) * | 2018-01-04 | 2018-06-29 | 南瑞集团有限公司 | The test system of fault detector based on real time data display |
| CN109188330A (en) * | 2018-08-30 | 2019-01-11 | 云南电力试验研究院(集团)有限公司 | A kind of fault diagnosis method and system of distribution network failure indicator |
| CN109387804A (en) * | 2017-08-09 | 2019-02-26 | 国网浙江省电力公司电力科学研究院 | The soft lineal statistic method of one kind, metering device accuracy checking method and system |
| CN110426561A (en) * | 2019-07-18 | 2019-11-08 | 科大智能科技股份有限公司 | A kind of outer detection method for applying signal generation apparatus signature waveform |
| CN111983432A (en) * | 2020-09-01 | 2020-11-24 | 无锡卓海科技有限公司 | Simulation test system for wafer position detection device |
-
2014
- 2014-06-13 CN CN201420316003.1U patent/CN203965613U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483643A (en) * | 2014-11-27 | 2015-04-01 | 华中科技大学 | Modeling method based on detection platform of fault indicator for physical simulation of power distribution network |
| CN104483643B (en) * | 2014-11-27 | 2017-05-10 | 华中科技大学 | Modeling method based on detection platform of fault indicator for physical simulation of power distribution network |
| CN105116360A (en) * | 2015-10-14 | 2015-12-02 | 国家电网公司 | ADPSS (advanced digital power system simulator) based test system for low current grounding line selector and test method of system |
| CN105866720B (en) * | 2016-05-23 | 2018-07-27 | 国网浙江省电力公司紧水滩水力发电厂 | A kind of DC system fault simulator |
| CN105866720A (en) * | 2016-05-23 | 2016-08-17 | 国网浙江省电力公司紧水滩水力发电厂 | Fault simulation device for direct-current system |
| CN106093820A (en) * | 2016-06-21 | 2016-11-09 | 国家电网公司 | The Performance Test System of distribution line failure positioner and method |
| CN109387804A (en) * | 2017-08-09 | 2019-02-26 | 国网浙江省电力公司电力科学研究院 | The soft lineal statistic method of one kind, metering device accuracy checking method and system |
| CN109387804B (en) * | 2017-08-09 | 2021-06-04 | 国网浙江省电力公司电力科学研究院 | Flexible direct system statistical method and metering device precision detection method and system |
| CN108226843A (en) * | 2018-01-04 | 2018-06-29 | 南瑞集团有限公司 | The test system of fault detector based on real time data display |
| CN109188330A (en) * | 2018-08-30 | 2019-01-11 | 云南电力试验研究院(集团)有限公司 | A kind of fault diagnosis method and system of distribution network failure indicator |
| CN110426561A (en) * | 2019-07-18 | 2019-11-08 | 科大智能科技股份有限公司 | A kind of outer detection method for applying signal generation apparatus signature waveform |
| CN111983432A (en) * | 2020-09-01 | 2020-11-24 | 无锡卓海科技有限公司 | Simulation test system for wafer position detection device |
| CN111983432B (en) * | 2020-09-01 | 2021-04-20 | 无锡卓海科技有限公司 | Simulation test system for wafer position detection device |
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