CN101441242A - Method for detecting failure current cutting-off time when electric power system out of order - Google Patents
Method for detecting failure current cutting-off time when electric power system out of order Download PDFInfo
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- CN101441242A CN101441242A CNA2008102434387A CN200810243438A CN101441242A CN 101441242 A CN101441242 A CN 101441242A CN A2008102434387 A CNA2008102434387 A CN A2008102434387A CN 200810243438 A CN200810243438 A CN 200810243438A CN 101441242 A CN101441242 A CN 101441242A
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- time
- protection
- protective device
- microcomputer
- isolating switch
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Abstract
The invention relates to a detection method, which is a detection method for failure current mute time when the electric power system goes wrong. The method comprises the following steps: the quick-break protection and overcurrent protection of a protection device is set as a same current fixed value; a microcomputer protection check gauge starts timing when applying current to the protection device; after the protection device acts, a tripping signal is sent to a breaker; after the breaker trips, a signal is returned to the microcomputer protection check gauge, the microcomputer protection check gauge stops timing, and the acting time of the protection device is read through the microcomputer protection check gauge; the acting time of the protection device is added with the fixed tripping time of the breaker to obtain the acting time of quick-break protection, and the acting time of quick-break protection is added with quenching time to obtain the failure current mute time. The method can obtain the effective mute time of the failure current, thus providing the basis for shortening protection differential.
Description
Technical field
The present invention relates to a kind of detection method, the detection method of the fault current mute time when electric system is broken down specifically.
Background technology
Protecting electrical power system is adjusted in the calculation process, and overcurrent protection differential adjusting actuation time generally adjusted according to 0.5S, can reliably realize with the selectivity of guaranteeing overcurrent protection.Along with being extensive use of of Microcomputer Protection, to compare with widely used electromagnetic type protection of past, the reliability of Microcomputer Protection, selectivity, correctness, rapidity are significantly improved.The differential of setting time of overcurrent protection can be reduced into about 0.3S; that is: fault current mute time T (intrinsic opening time+quenching time of T=protective device actuation time+isolating switch) effectively; key is that can effective mute time of fault current be controlled in the 0.3S, and protection is differential to provide reliable foundation in order to dwindle.But there are not relevant regulation and foundation in the correlation technique data both at home and abroad.Therefore; need by actual test fast tripping protection actuation time (the intrinsic opening time of protective device actuation time+isolating switch); add the quenching time; draw fault current mute time T (intrinsic opening time+quenching time of T=protective device actuation time+isolating switch) effectively, thereby protect the differential reliable foundation that provides for dwindling.And in the prior art, do not have the detection method of a kind of effective fault current mute time.
Summary of the invention
Technical matters to be solved by this invention is: the shortcoming at above prior art exists proposes a kind of fault current detection method of mute time T effectively of measuring.
The technical scheme that the present invention solves above technical matters is:
The detection method of fault current mute time when electric system is broken down comprises protective device, isolating switch and Microcomputer Protection tester, carries out according to the following steps:
(1) sets fast tripping protection in the protective device and overcurrent protection for same current ration;
Pick up counting when (2) the Microcomputer Protection tester applies electric current to protective device;
(3) after the protective device action, send out trip signal and give isolating switch;
(4) give the Microcomputer Protection tester with signal feedback behind the circuit breaker trip, the timing of Microcomputer Protection tester ends, and protective device reads by the Microcomputer Protection tester actuation time;
(5) protective device with step (4) adds that the intrinsic opening time of isolating switch obtains actuation time, fast tripping protection actuation time, fast tripping protection is added that the quenching time draws the fault current mute time actuation time.
Advantage of the present invention is: by detection method of the present invention can be complete detection fast tripping protection actuation time (the intrinsic opening time of protective device actuation time+isolating switch); add the quenching time; just can draw fault current mute time T (intrinsic opening time+quenching time of T=protective device actuation time+isolating switch) effectively, thereby for the differential foundation that provides of protection is provided.
Utilize detection method of the present invention, the fast tripping protection actuation time of detection, (the intrinsic opening time of protective device actuation time+isolating switch) was 0.077S～0.111S.Detect by segmentation and to verify, separately protective device actuation time, isolating switch are detected actuation time, both add up to about 0.115S.The conclusion that draws of two kinds of methods conforms to substantially.According to fault current mute time intrinsic opening time+quenching time of T=protective device actuation time+isolating switch; also need add the quenching time (showing that according to related data the quenching time is 0.015S); be 0.077+0.015S～0.115+0.015S; therefore; fault current (the fast tripping protection operation time limit is set at 0S, and electric arc the is extinguished reliably) time of excising effectively is: 0.092～0.130S.To fault recorder according to one's analysis, both short-circuit current that draws fast tripping protection substantially conform at 0.077～0.115S the mute time effectively.Therefore detection method detection accuracy of the present invention is higher, to the analysis of electric power system fault and dwindle the differential setting of protection and have higher utility.
Embodiment
Embodiment one
Present embodiment is a kind of electric system detection method of the fault current mute time when breaking down, comprises protective device, isolating switch and Microcomputer Protection tester, carries out according to the following steps:
(1) sets fast tripping protection in the protective device and overcurrent protection for same current ration;
Pick up counting when (2) the Microcomputer Protection tester applies electric current to protective device;
(3) after the protective device action, send out trip signal and give isolating switch;
(4) give the Microcomputer Protection tester with signal feedback behind the circuit breaker trip, the timing of Microcomputer Protection tester ends, and protective device reads by the Microcomputer Protection tester actuation time;
(5) protective device with step (4) adds that the intrinsic opening time of isolating switch obtains actuation time, fast tripping protection actuation time, fast tripping protection is added that the quenching time draws the fault current mute time actuation time.
The detection method of present embodiment, the fast tripping protection actuation time of detection, (the intrinsic opening time of protective device actuation time+isolating switch) was 0.08S.According to fault current mute time intrinsic opening time+quenching time of T=protective device actuation time+isolating switch; also need add quenching time 0.015S; be 0.08+0.015=0.095S; therefore; fault current (the fast tripping protection operation time limit is set at 0S, and electric arc the is extinguished reliably) time of excising effectively is: 0.095S.
Embodiment two
The detection method of present embodiment is identical with embodiment one, and be 0.095S the fast tripping protection actuation time (the intrinsic opening time of protective device actuation time+isolating switch) that present embodiment detects.According to fault current mute time intrinsic opening time+quenching time of T=protective device actuation time+isolating switch; also need add quenching time 0.015S; be 0.095+0.015=0.110S; therefore; fault current (the fast tripping protection operation time limit is set at 0S, and electric arc the is extinguished reliably) time of excising effectively is: 0.110S.
Embodiment three
The detection method of present embodiment is identical with embodiment one, and be 0.105S the fast tripping protection actuation time (the intrinsic opening time of protective device actuation time+isolating switch) that present embodiment detects.According to fault current mute time intrinsic opening time+quenching time of T=protective device actuation time+isolating switch; also need add quenching time 0.015S; be 0.105+0.015=0.12S; therefore; fault current (the fast tripping protection operation time limit is set at 0S, and electric arc the is extinguished reliably) time of excising effectively is: 0.12S.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (1)
1. the detection method of the fault current mute time when electric system is broken down comprises protective device, isolating switch and Microcomputer Protection tester, it is characterized in that: carry out according to the following steps:
(1) sets fast tripping protection in the protective device and overcurrent protection for same current ration;
Pick up counting when (2) the Microcomputer Protection tester applies electric current to protective device;
(3) after the protective device action, send out trip signal and give isolating switch;
(4) give the Microcomputer Protection tester with signal feedback behind the circuit breaker trip, the timing of Microcomputer Protection tester ends, and protective device reads by the Microcomputer Protection tester actuation time;
(5) protective device with step (4) adds that the intrinsic opening time of isolating switch obtains actuation time, fast tripping protection actuation time, fast tripping protection is added that the quenching time draws the fault current mute time actuation time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102434387A CN101441242B (en) | 2008-12-23 | 2008-12-23 | Method for detecting failure current cutting-off time when electric power system out of order |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102434387A CN101441242B (en) | 2008-12-23 | 2008-12-23 | Method for detecting failure current cutting-off time when electric power system out of order |
Publications (2)
| Publication Number | Publication Date |
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| CN101441242A true CN101441242A (en) | 2009-05-27 |
| CN101441242B CN101441242B (en) | 2010-12-08 |
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| CN2008102434387A Expired - Fee Related CN101441242B (en) | 2008-12-23 | 2008-12-23 | Method for detecting failure current cutting-off time when electric power system out of order |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323500A (en) * | 2011-07-08 | 2012-01-18 | 贵州电力试验研究院 | Method and device for solving inconsistent differential protection actions of double sets of buses in transformer |
| CN104460369A (en) * | 2014-11-06 | 2015-03-25 | 国家电网公司 | Method for improving sensitivity time of flashy flow controller |
| CN110687399A (en) * | 2019-10-15 | 2020-01-14 | 贵州电网有限责任公司 | Method for judging waveform fault starting time of power distribution network fault indicator |
| CN112327080A (en) * | 2020-10-30 | 2021-02-05 | 国网江苏省电力有限公司 | Method for testing time of rapid arc-extinguishing protection full-period moving die |
| CN112433127A (en) * | 2020-11-13 | 2021-03-02 | 珠海许继电气有限公司 | Fault type identification method and device based on platform area intelligent fusion terminal |
| CN114389241A (en) * | 2021-12-13 | 2022-04-22 | 国网河北省电力有限公司电力科学研究院 | Relay protection setting value setting method and device for active power distribution network |
-
2008
- 2008-12-23 CN CN2008102434387A patent/CN101441242B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323500A (en) * | 2011-07-08 | 2012-01-18 | 贵州电力试验研究院 | Method and device for solving inconsistent differential protection actions of double sets of buses in transformer |
| CN102323500B (en) * | 2011-07-08 | 2014-07-09 | 贵州电力试验研究院 | Method and device for solving inconsistent differential protection actions of double sets of buses in transformer |
| CN104460369A (en) * | 2014-11-06 | 2015-03-25 | 国家电网公司 | Method for improving sensitivity time of flashy flow controller |
| CN110687399A (en) * | 2019-10-15 | 2020-01-14 | 贵州电网有限责任公司 | Method for judging waveform fault starting time of power distribution network fault indicator |
| CN112327080A (en) * | 2020-10-30 | 2021-02-05 | 国网江苏省电力有限公司 | Method for testing time of rapid arc-extinguishing protection full-period moving die |
| CN112433127A (en) * | 2020-11-13 | 2021-03-02 | 珠海许继电气有限公司 | Fault type identification method and device based on platform area intelligent fusion terminal |
| CN114389241A (en) * | 2021-12-13 | 2022-04-22 | 国网河北省电力有限公司电力科学研究院 | Relay protection setting value setting method and device for active power distribution network |
| CN114389241B (en) * | 2021-12-13 | 2023-07-25 | 国网河北省电力有限公司电力科学研究院 | Relay protection setting value setting method and device for active power distribution network |
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| Publication number | Publication date |
|---|---|
| CN101441242B (en) | 2010-12-08 |
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Owner name: NANJING NANGANG INDUSTRY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: NANJING UNITE STEEL CO., LTD. Effective date: 20091218 |
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Effective date of registration: 20091218 Address after: Liuhe District of Nanjing City, Jiangsu Province, xiejiadian post encoding: 210035 Applicant after: Nanjing Iron & Steel United Co., Ltd. Address before: Liuhe District of Nanjing City, Jiangsu Province, xiejiadian post encoding: 210035 Applicant before: Nanjing Iron & Steel United Co., Ltd. |
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