CN101882783A - Method for reducing fault processing time of current grounding system in 10kV voltage class - Google Patents
Method for reducing fault processing time of current grounding system in 10kV voltage class Download PDFInfo
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- CN101882783A CN101882783A CN 201010162939 CN201010162939A CN101882783A CN 101882783 A CN101882783 A CN 101882783A CN 201010162939 CN201010162939 CN 201010162939 CN 201010162939 A CN201010162939 A CN 201010162939A CN 101882783 A CN101882783 A CN 101882783A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002844 melting Methods 0.000 claims description 52
- 230000008018 melting Effects 0.000 claims description 52
- 239000004020 conductor Substances 0.000 abstract 4
- 238000004804 winding Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of substations, in particular to a method for reducing the fault processing time of a small current grounding system in 10kV voltage class and the like. The method for reducing the fault processing time of the current grounding system in the 10kV voltage class is characterized in that connecting wires are respectively led out of three phase conductors of a secondary circuit of a voltage transformer of a 10kV signal circuit and connected with input end of a coil of a negative-sequence voltage relay; a first normally open contact of the negative-sequence voltage relay is connected on a high-voltage fuse breaking signal indication return conductor of an alarm window signal circuit of the 10kV signal circuit in series, a normally closed contact of the negative-sequence voltage relay is connected on a 10kV bus grounding signal indication return conductor of the alarm window signal circuit of the 10kV signal circuit in series, and a second normally open contact of the negative-sequence voltage relay is connected on a low-voltage fuse breaking signal indication return conductor of the alarm window signal circuit of the 10kV signal circuit in series. The method can lead the fault processing time to be only 5min and lead the fault processing error rate (%) to be 0 during 10kV high-voltage fuse breaking and low-voltage fuse breaking.
Description
Technical field
The invention belongs to transformer station's technical field, be specifically related to the method in low current neutral grounding system fault processing times such as a kind of 10kV of minimizing electric pressure.
Background technology
Transformer station is when handling the 10kV fault, and fault handling time is long, directly has influence on the economic benefit and the safe operation of electric power enterprise, mainly shows following three aspects:
One, causes metering loss.For example: on May 12nd, 2000, when 10kVPT low pressure fuse melting fault took place in Xianning, Hubei Province transformer station, owing to do not send any signal, fault was not in time handled, and causes few note electric weight 2500kwh.
Two, influence power supply reliability.For example, when 10kVPT high pressure fuse melting fault takes place in Xianning, Hubei Province transformer station,, cause person on duty's error in judgement in November, 1999, caused the unnecessary 3500KW of operating a switch because mistake has been sent out " 10kV busbar grounding " signal.All cause the economic loss of knowing clearly for electric power enterprise and user.
Three, influence the security of operation of equipment.Untimely when the processing of 10kV line single phase grounding failure, when developing into phase-to phase fault, huge short circuit current will cause irremediable infringement to equipment.
Reason is: the design of 10kV signal circuit is unreasonable, there is not signal resolution function (being that it can not distinguish high pressure fuse melting fault, low pressure fuse melting fault, single phase ground fault), causing when breaking down can mistaking signal or do not signal, and is that fault can not obtain the in time correct main cause of handling.
Summary of the invention
The object of the present invention is to provide a kind of method of current grounding system fault handling time of the 10kV of minimizing electric pressure, this method can reduce fault handling time.
To achieve these goals, the technical solution used in the present invention is: reduce the method for the current grounding system fault handling time of 10kV electric pressure, it is characterized in that: draw wiring respectively and link to each other with the coil input end of negative sequence voltage relay on the triple line in the voltage transformer secondary loop of 10kV signal circuit; First normally opened contact (FYJ1) of serial connection negative sequence voltage relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact (FYJ2) of serial connection negative sequence voltage relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact (FYJ3) of serial connection negative sequence voltage relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit; Drawing wiring respectively on first output line of the open delta coiling of the voltage transformer secondary side of 10kV signal circuit and second output line links to each other with the coil input end of signal relay; First normally opened contact (XJJ1) of serial connection signal relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact (XJJ2) of serial connection signal relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact (XJJ3) of serial connection signal relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit.
The invention has the beneficial effects as follows: adopt said method, high pressure fuse melting fault, low pressure fuse melting fault, single phase ground fault can be distinguished, in time find out failure cause, in time fix a breakdown; When 10kV high pressure fuse melting and low pressure fuse melting, fault handling time all only needs 5 minutes, and fault processing error rate (%) is 0.
Description of drawings
Fig. 1 is the structural representation in the voltage transformer secondary loop of 10kV signal circuit of the present invention;
Fig. 2 is the structural representation of the alarm window signal circuit of 10kV signal circuit of the present invention.
Among the figure: the 1-voltage transformer, 2-first output line, 3-second output line, the little bus of 4-signal (XM), 5-high pressure fuse melting signal indication return line, 6-10kV busbar grounding signal indication return line, 7-low pressure fuse melting signal indication return line, the 8-first high pressure fuse melting fault-signal indicator light, the 9-second high pressure fuse melting fault-signal indicator light, 10-the one 10kV busbar grounding fault-signal indicator light, 11-the 2nd 10kV busbar grounding fault-signal indicator light, the 12-first low pressure fuse melting fault-signal indicator light, the 13-second low pressure fuse melting fault-signal indicator light.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
As shown in Figure 1 and Figure 2, reduce the method for the current grounding system fault handling time of 10kV electric pressure, (being three-phase output line a, b, the c among Fig. 1) drawn wiring respectively and linked to each other with the coil input end of negative sequence voltage relay on the triple line in the voltage transformer secondary loop of 10kV signal circuit; First normally opened contact (FYJ1) of serial connection negative sequence voltage relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact (FYJ2) of serial connection negative sequence voltage relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact (FYJ3) of serial connection negative sequence voltage relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit; On first output line of the open delta coiling of the voltage transformer secondary side of 10kV signal circuit and second output line, draw wiring link to each other with the coil input end of signal relay (being existing) respectively; First normally opened contact (XJJ1) (being existing) of serial connection signal relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact (XJJ2) of serial connection signal relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact (XJJ3) of serial connection signal relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit.A among Fig. 1, B, C represent the high-voltage line of voltage transformer primary side.The 10kV signal circuit belongs to the current grounding system of 10kV electric pressure.1YMc representative voltage instrument transformer open delta coil windings C phase terminal among Fig. 2, YMN representative voltage instrument transformer open delta coil windings earth terminal.
The 10kV signal circuit comprises open delta coiling, alarm window signal circuit, signal relay, the negative sequence voltage relay of voltage transformer secondary loop, voltage transformer secondary side, and (being three-phase output line a, b, the c among Fig. 1) draws wiring and the coil input end of negative sequence voltage relay continuous (for 3 corresponding inputs) respectively on the triple line of voltage transformer secondary loop [secondary winding (a side joint three-phase high-voltage line A of voltage transformer 1, B, C) that comprises voltage transformer 1]; Draw wiring link to each other with the coil input end of signal relay (for 2 corresponding inputs) on first output line 2 of the open delta winding of voltage transformer secondary side and second output line 3 respectively;
The alarm window signal circuit comprises the little bus 4 of signal, high pressure fuse melting signal indication return line 5,10kV busbar grounding signal indication return line 6, low pressure fuse melting signal indication return line 7, the first high pressure fuse melting fault-signal indicator light 8, the second high pressure fuse melting fault-signal indicator light 9, the one 10kV busbar grounding fault-signal indicator light 10, the 2nd 10kV busbar grounding fault-signal indicator light 11, the first low pressure fuse melting fault-signal indicator light 12, the second low pressure fuse melting fault-signal indicator light 13; One end of high pressure fuse melting signal indication return line 5 is connected with the little bus 4 of signal, the other end of high pressure fuse melting signal indication return line 5 is connected with first end points of the first high pressure fuse melting fault-signal indicator light 8, the second high pressure fuse melting fault-signal indicator light 9 respectively, second end points of the first high pressure fuse melting fault-signal indicator light 8 links to each other with the little bus of a YBM (being the 1YBM among Fig. 2), and second end points of the second high pressure fuse melting fault-signal indicator light 9 links to each other with the little bus of the 2nd YBM (being the 2YBM among Fig. 2); One end of 10kV busbar grounding signal indication return line 6 is connected with the little bus 4 of signal, the other end of 10kV busbar grounding signal indication return line 6 is connected with first end points of a 10kV busbar grounding fault-signal indicator light 10, the 2nd 10kV busbar grounding fault-signal indicator light 11 respectively, second end points of the one 10kV busbar grounding fault-signal indicator light 10 links to each other with the little bus of a YBM (being the 1YBM among Fig. 2), and second end points of the 2nd 10kV busbar grounding fault-signal indicator light 11 links to each other with the little bus of the 2nd YBM (being the 2YBM among Fig. 2); One end of low pressure fuse melting signal indication return line 7 is connected with the little bus 4 of signal, the other end of low pressure fuse melting signal indication return line 7 is connected with first end points of the first low pressure fuse melting fault-signal indicator light 12, the second low pressure fuse melting fault-signal indicator light 13 respectively, second end points of the first low pressure fuse melting fault-signal indicator light 12 links to each other with the little bus of a YBM (being the 1YBM among Fig. 2), and second end points of the second low pressure fuse melting fault-signal indicator light 13 links to each other with the little bus of the 2nd YBM (being the 2YBM among Fig. 2);
First normally opened contact (FYJ1) of serial connection negative sequence voltage relay on the high pressure fuse melting signal indication return line of alarm window signal circuit, the normally-closed contact (FYJ2) of serial connection negative sequence voltage relay on the 10kV busbar grounding signal indication return line of alarm window signal circuit, second normally opened contact (FYJ3) of serial connection negative sequence voltage relay on the low pressure fuse melting signal indication return line of alarm window signal circuit; First normally opened contact (XJJ1) of serial connection signal relay on the high pressure fuse melting signal indication return line of alarm window signal circuit, second normally opened contact (XJJ2) of serial connection signal relay on the 10kV busbar grounding signal indication return line of alarm window signal circuit, the normally-closed contact (XJJ3) of serial connection signal relay on the low pressure fuse melting signal indication return line of alarm window signal circuit.
After adopting method of the present invention, to mean failure rate processing time fault processing error rate and adding up, when 10kV high pressure fuse melting took place, the mean failure rate processing time was reduced to 4 minutes by 19 minutes of tradition (before the transformation); When 10kV low pressure fuse melting took place, the mean failure rate processing time was reduced to 3 minutes by 38 minutes of tradition (before the transformation), and error rate is reduced to 0 by 22% before movable.After the present invention has carried out transforming to the 10kV signal circuit, shortened the processing time of " high pressure fuse melting " and " low pressure fuse melting " two kinds of faults greatly, annual decreased average electric quantity loss 10000KWH.Also stopped simultaneously the error of troubleshooting, reduced interruption duration and number of times, improved power supply quality the user.The present invention extends in a lot of 220kV and the following transformer station, and its economic benefit is very considerable.
Claims (1)
1. reduce the method for the current grounding system fault handling time of 10kV electric pressure, it is characterized in that: on the triple line in the voltage transformer secondary loop of 10kV signal circuit, draw wiring respectively and link to each other with the coil input end of negative sequence voltage relay; First normally opened contact of serial connection negative sequence voltage relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact of serial connection negative sequence voltage relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact of serial connection negative sequence voltage relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit; Drawing wiring respectively on first output line of the open delta coiling of the voltage transformer secondary side of 10kV signal circuit and second output line links to each other with the coil input end of signal relay; First normally opened contact of serial connection signal relay on the high pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit, second normally opened contact of serial connection signal relay on the 10kV busbar grounding signal indication return line of the alarm window signal circuit of 10kV signal circuit, the normally-closed contact of serial connection signal relay on the low pressure fuse melting signal indication return line of the alarm window signal circuit of 10kV signal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010162939XA CN101882783B (en) | 2010-04-28 | 2010-04-28 | Method for reducing fault processing time of current grounding system in 10kV voltage class |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010162939XA CN101882783B (en) | 2010-04-28 | 2010-04-28 | Method for reducing fault processing time of current grounding system in 10kV voltage class |
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| CN101882783A true CN101882783A (en) | 2010-11-10 |
| CN101882783B CN101882783B (en) | 2012-09-19 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525186A (en) * | 2003-02-28 | 2004-09-01 | 上海华联低压电器厂 | Electric line fault location device |
| CN200953470Y (en) * | 2006-10-10 | 2007-09-26 | 杜志庭 | Small current grounding wire selecting device for neutral point non-effective ground connection system |
| CN101452038A (en) * | 2007-11-29 | 2009-06-10 | 上海蓝瑞软件技术有限公司 | Low current neutral grounding electric network single-phase earth fault diagnostic method |
-
2010
- 2010-04-28 CN CN201010162939XA patent/CN101882783B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525186A (en) * | 2003-02-28 | 2004-09-01 | 上海华联低压电器厂 | Electric line fault location device |
| CN200953470Y (en) * | 2006-10-10 | 2007-09-26 | 杜志庭 | Small current grounding wire selecting device for neutral point non-effective ground connection system |
| CN101452038A (en) * | 2007-11-29 | 2009-06-10 | 上海蓝瑞软件技术有限公司 | Low current neutral grounding electric network single-phase earth fault diagnostic method |
Non-Patent Citations (4)
| Title |
|---|
| 《上海电力》 20060331 沈怿烨 35kV小电流接地系统单相接地与TV熔丝熔断故障征象分析 第314-316页 1 , 第3期 * |
| 《农村电气化》 20011030 纪鸿彬 小电流接地系统故障的分析及处理 第31-32页 1 , 第10期 * |
| 《山东省石油学会油田电力、通信及自动化技术研讨会优秀工程技术论文集》 20091231 曾瑾文 等 小电流接地系统绝缘监察装置的改进措施 第165-169页 1 , * |
| 《继电器》 20020131 杜景远 等 浅谈PT断线、系统接地、母线失压的判据 第60-61页 1 第30卷, 第1期 * |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20120929 |
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Effective date of registration: 20120929 Address after: 30 No. 437100 Xianning city in Hubei Province spring Gan River Avenue Patentee after: Hubei Electric Power Company, Xianning Power Supply Company Patentee after: State Grid Corporation of China Address before: 30 No. 437100 Xianning city in Hubei Province spring Gan River Avenue Patentee before: Hubei Electric Power Company, Xianning Power Supply Company |
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Granted publication date: 20120919 Termination date: 20170428 |