CN102508119B - 一种it电力系统并联回路接地故障定位方法 - Google Patents

一种it电力系统并联回路接地故障定位方法 Download PDF

Info

Publication number
CN102508119B
CN102508119B CN 201110406277 CN201110406277A CN102508119B CN 102508119 B CN102508119 B CN 102508119B CN 201110406277 CN201110406277 CN 201110406277 CN 201110406277 A CN201110406277 A CN 201110406277A CN 102508119 B CN102508119 B CN 102508119B
Authority
CN
China
Prior art keywords
cable
fault
hall current
current mutual
mutual inductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN 201110406277
Other languages
English (en)
Other versions
CN102508119A (zh
Inventor
叶小松
王金全
吴振飞
邢鸣
丁建兴
唐友怀
徐晔
沈巍
崔陈华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
91053 Unit Of Chinese Pla
Original Assignee
JIANGSU HONGAN TRANSFORMER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU HONGAN TRANSFORMER CO Ltd filed Critical JIANGSU HONGAN TRANSFORMER CO Ltd
Priority to CN 201110406277 priority Critical patent/CN102508119B/zh
Publication of CN102508119A publication Critical patent/CN102508119A/zh
Application granted granted Critical
Publication of CN102508119B publication Critical patent/CN102508119B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Locating Faults (AREA)

Abstract

一种IT电力系统并联回路接地故障定位方法，IT电力系统的输电与受电两处之间的输电母排之间并联了n条相同规格的电缆，设有一个直流信号源，并通过一个限流电抗L注入IT电力系统配电变压器的中性点，并在每条并联电缆的首端装设断路器QF，在电缆末端装设负荷开关K和霍尔电流互感器CT；直流信号源DC用于提供故障回路电源，限流电抗L用来保护直流信号源，断路器QF和负荷开关K用来投切每一条电缆，霍尔电流互感器CT用于检测每条电缆上是否流过故障电流；直流注入源的投切、断路器QF的开合、霍尔电流传感器的检测均可通过现场总线结构在上位机集中控制。

Description

一种IT电力系统并联回路接地故障定位方法
技术领域
本发明涉及一种IT电力系统并联回路接地故障定位方法。
技术背景
当IT电力系统（供电行业内指无中心导体的常用供电系统）内负荷容量过大时，某段输电线路如果仅使用单条电缆，其载流量无法满足要求，必须将多条相同规格的电缆并联使用。如果在并联的多条电缆中有一条发生了接地故障，IT电力系统的绝缘监测装置能够报警，选线装置也可以指示出故障线路，但如何从多条电缆中选出故障的电缆是一项难题，目前未有专门技术的公开。
发明内容
本发明的目的是，提出一种大容量IT电力系统并联回路接地故障定位方法，即通过注入直流电流来查找故障线路与故障点。
本发明技术方案是：IT电力系统并联回路接地故障定位方法，IT电力系统的输电与受电两处之间的输电母排之间并联了n条相同规格的电缆，设有一个直流信号源，并通过一个限流电抗L注入IT电力系统配电变压器的中性点，并在每条并联电缆的首端装设断路器QF，在电缆末端装设负荷开关K和霍尔电流互感器CT；直流信号源DC用于提供故障回路电源，限流电抗L用来保护直流信号源，断路器QF和负荷开关K用来投切每一条电缆，霍尔电流互感器CT用于检测每条电缆上是否流过故障电流；直流注入源的投切、断路器QF的开合、霍尔电流传感器的检测均可通过现场总线结构在上位机集中控制。当n条电缆中第m条电缆发生接地故障时，注入的直流信号可通过限流电抗L——各线路上的阻抗——接地电阻R——大地构成故障回路，故障直流电流可流经每一条线路末端装设的CT，所有的霍尔电流互感器都能感应出故障电压，仅如此实施还不能指示出具体哪一条电缆故障。此时并联电缆中某条电缆发生接地故障，所有CT均感应出故障电压，指示故障；
断开QF1，检测CT1，CT1未感应出故障电压，证明电缆1无故障，闭合QF1；
断开QF2，检测CT2，CT2未感应出故障电压，证明电缆2无故障，闭合QF2；
直到依次断开QFn，检测CTn，CTn感应出故障电压，上位机指示电缆n故障，保持QFn断开；进一步断开故障电缆n末端的负荷开关Kn，此时故障电缆n已不再带电，靠其余的电缆保持系统IT电力系统供应，更换该电缆后再次闭合QFn和Kn，恢复第n条电缆工作。n常用4-10根。
本发明有益效果是：通过提出的IT电力系统配电变压器的中性点和信号源的加入，对IT电力系统并联回路接地故障定位，能对故障线路进行准确的定位，可靠性高并方便在不影响供电条件下更换故障电缆，在大容量IT电力系统中应用尤其重要。
附图说明
图1本发明电路图。
具体实施方式
本发明实施方式如图所示，IT电力系统供电的输电和受电两处母排之间并联了n条相同规格的电缆。由IT电力系统和地之间接入的一直流源DC，设有保护直流信号源的限流电抗器L，安装与电缆首端的断路器QF，安装与电缆末端的的负荷开关K和霍尔电流互感器CT，控制上述设备的上位机等组成。
具体需要一个直流信号源，通过一个限流电抗L注入配电变压器的中性点，并在每条并联电缆的首端装设断路器QF，在电缆末端装设负荷开关K和霍尔电流互感器CT。直流信号源DC用于提供故障回路电源，限流电抗用来保护直流信号源，断路器QF和负荷开关K用来投切每一条电缆，电流互感器CT用于检测每条电缆上是否流过故障电流。直流注入源的投切、断路器QF的开合、霍尔直流传感器的检测均可通过现场总线结构在上位机集中控制。
当第n条电缆发生接地故障时，注入的直流信号可通过限流电抗L——各线路上的阻抗——接地电阻R——大地构成故障回路，故障直流电流可流经每一条线路末端装设的CT，所有的霍尔电流互感器都能感应出故障电压，仅如此实施还不能指示出具体哪一条电缆故障。该方法立足于逐条检测电缆上的接地故障，需要进一步保证本电缆故障时，本电缆末端的CT确实能可靠感应出故障电压，其具体实施流程如下(假设接地故障发生在第n条电缆电缆上)：
1.并联电缆中某条电缆发生接地故障，所有CT均感应出故障电压，指示故障；
2.断开QF1，检测CT1，CT1未感应出故障电压，证明电缆1无故障，闭合QF1；
3.断开QF2，检测CT2，CT2未感应出故障电压，证明电缆2无故障，闭合QF2；
……
n.断开QFn，检测CTn，CTn感应出故障电压，上位机指示电缆n故障，保持QFn断开；
当已经定位到故障电缆且需要更换电缆时，可进一步断开故障电缆n末端的负荷开关Kn，此时故障电缆n已不再带电，靠其余的电缆保持IT电力系统电力供应，更换该电缆后再次闭合QFn和Kn，恢复第n条电缆工作。本发明可检测并联电缆上的接地故障，并定位到具体的某根电缆上。
整个方案可在不切断系统供电的情况下正确指示故障，并排除故障，维持了IT电力系统供电可靠性高的优势。

Claims (2)

1.一种IT电力系统并联回路接地故障定位方法，其特征在于IT电力系统的输电与受电两处之间的输电母排之间并联了n条相同规格的电缆，设有一个直流信号源，并通过一个限流电抗L注入IT电力系统配电变压器的中性点，并在每条并联电缆的首端装设断路器QF，在电缆末端装设负荷开关K和霍尔电流互感器CT；直流信号源DC用于提供故障回路电源，限流电抗L用来保护直流信号源，断路器QF和负荷开关K用来投切每一条电缆，霍尔电流互感器CT用于检测每条电缆上是否流过故障电流；直流信号源的投切、断路器QF的开合、霍尔电流传感器CT的检测均能通过现场总线结构在上位机集中控制；当n条电缆中第m条电缆发生接地故障时，注入的直流信号通过限流电抗L——各电缆上的阻抗——接地电阻R——大地构成故障回路，故障直流电流能流经每一条电缆末端装设的霍尔电流互感器CT，所有的霍尔电流互感器都能感应出故障电压；此时并联电缆中某条电缆发生接地故障，所有霍尔电流互感器CT均感应出故障电压，指示故障；
具体过程：断开断路器QF1，检测电缆1的霍尔电流互感器CT1，CT1未感应出故障电压，证明电缆1无故障，闭合断路器QF1；断开断路器QF2，检测电缆2的霍尔电流互感器CT2，CT2未感应出故障电压，证明电缆2无故障，闭合断路器QF2；依次断开直到断路器QFn，检测电缆n的霍尔电流互感器CTn，CTn感应出故障电压，上位机指示电缆n故障，保持断路器QFn断开，其中CTn和QFn分别指电缆n的霍尔电流互感器和断路器。
2.按照权利要求1所述的一种IT电力系统并联回路接地故障定位方法，其特征在于进一步断开故障电缆n末端的负荷开关Kn，此时故障电缆n已不再带电，靠其余的电缆保持IT电力系统电力供应，更换该电缆后再次闭合断路器QFn和负荷开关Kn，恢复第n条电缆工作。
CN 201110406277 2011-12-09 2011-12-09 一种it电力系统并联回路接地故障定位方法 Active CN102508119B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110406277 CN102508119B (zh) 2011-12-09 2011-12-09 一种it电力系统并联回路接地故障定位方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110406277 CN102508119B (zh) 2011-12-09 2011-12-09 一种it电力系统并联回路接地故障定位方法

Publications (2)

Publication Number Publication Date
CN102508119A CN102508119A (zh) 2012-06-20
CN102508119B true CN102508119B (zh) 2013-11-06

Family

ID=46220224

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110406277 Active CN102508119B (zh) 2011-12-09 2011-12-09 一种it电力系统并联回路接地故障定位方法

Country Status (1)

Country Link
CN (1) CN102508119B (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106443302B (zh) * 2016-11-02 2019-09-06 龙滩水电开发有限公司龙滩水力发电厂 一种大型水轮发电机定子接地故障安全查找方法
CN108287295B (zh) * 2018-01-29 2024-01-30 山东钢铁股份有限公司 电力线路接地故障位置查找方法和系统
CN108548993A (zh) * 2018-06-08 2018-09-18 中国人民解放军海军工程设计研究院 一种多电缆并联链接式故障选线方法
CN108923538A (zh) * 2018-07-16 2018-11-30 张哲� 配用电网络拓扑的监控方法
CN109387719A (zh) * 2018-12-10 2019-02-26 湖南金天钛业科技有限公司 一种直流水冷电缆使用状态检测装置及检测方法
CN113608068A (zh) * 2021-07-27 2021-11-05 国网天津市电力公司 一种基于双缆并行的可调式双环套寻址器及其安装方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777217A (en) * 1972-01-10 1973-12-04 L Groce Fault indicator apparatus for fault location in an electrical power distribution system
CN2342377Y (zh) * 1998-03-10 1999-10-06 彩虹彩色显像管总厂 高压供电电缆网络接地故障监视装置
JP4118259B2 (ja) * 2004-06-28 2008-07-16 愛知電機株式会社 直流地絡検出装置
CN101303387A (zh) * 2008-04-09 2008-11-12 中国石油化工股份有限公司胜利油田分公司临盘采油厂 直流注入式选线定位系统及其方法
CN101382577A (zh) * 2008-10-24 2009-03-11 华北电力大学 配电网单相接地故障定位装置
CN101435847A (zh) * 2008-12-26 2009-05-20 曲娜 小电流接地直流信号选线方法
CN101561473A (zh) * 2009-06-09 2009-10-21 曲娜 中性点非有效接地系统单相接地故障精确选线方法
EP2196812A1 (en) * 2008-12-09 2010-06-16 WaveTech Sweden AB Monitoring device for detecting earth faults

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777217A (en) * 1972-01-10 1973-12-04 L Groce Fault indicator apparatus for fault location in an electrical power distribution system
CN2342377Y (zh) * 1998-03-10 1999-10-06 彩虹彩色显像管总厂 高压供电电缆网络接地故障监视装置
JP4118259B2 (ja) * 2004-06-28 2008-07-16 愛知電機株式会社 直流地絡検出装置
CN101303387A (zh) * 2008-04-09 2008-11-12 中国石油化工股份有限公司胜利油田分公司临盘采油厂 直流注入式选线定位系统及其方法
CN101382577A (zh) * 2008-10-24 2009-03-11 华北电力大学 配电网单相接地故障定位装置
EP2196812A1 (en) * 2008-12-09 2010-06-16 WaveTech Sweden AB Monitoring device for detecting earth faults
CN101435847A (zh) * 2008-12-26 2009-05-20 曲娜 小电流接地直流信号选线方法
CN101561473A (zh) * 2009-06-09 2009-10-21 曲娜 中性点非有效接地系统单相接地故障精确选线方法

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
IT系统配出中性导体问题简析;王巍等;《建筑电气》;20111130(第11期);第48-49页及附图2 *
王巍等.IT系统配出中性导体问题简析.《建筑电气》.2011,(第11期),
蒋礼堂.谈TN系统电缆出线接地故障保护.《建筑电气》.2001,(第2期),
谈TN系统电缆出线接地故障保护;蒋礼堂;《建筑电气》;20011231(第2期);第12-13页 *
配出中性线的IT系统及其接到故障分析;金伟一等;《电气技术》;20100131(第1期);第55-58页 *
金伟一等.配出中性线的IT系统及其接到故障分析.《电气技术》.2010,(第1期),

Also Published As

Publication number Publication date
CN102508119A (zh) 2012-06-20

Similar Documents

Publication Publication Date Title
CN102508119B (zh) 一种it电力系统并联回路接地故障定位方法
CN104137268B (zh) 光伏发电机的光伏模块的对地过电压保护
US10340684B2 (en) Voltage derivative and zero-sequence broken conductor detection
CN103746353A (zh) 智能配电网自愈控制系统及其工作方法
CN105743072A (zh) 电动车组高压电气回路保护系统
CN110071489A (zh) 一种高温超导输电线路失超判别、切换控制方法和装置
CN111313379B (zh) 比较线路两侧线电压与备自投配合的断线保护方法
CN206575155U (zh) 具有接地分流功能的新型消弧线圈接地补偿装置
Kasztenny et al. Detection of incipient faults in underground medium voltage cables
US20240106208A1 (en) High voltage overhead electric transmission line equipped with switchgear unit
CN103414155A (zh) 一种中性点安装电子式快速消谐装置
CN101520484A (zh) 直流系统接地故障检测判别
CN103427394A (zh) 一种矿用隔爆型低压选择性漏电保护器
Jayaprakash et al. Planning and coordination of relay in distribution system using Etap
CN102437551B (zh) 变压器过流保护装置和电力机车
Pongthavornsawad et al. Broken conductor detection for overhead line distribution system
CN102288859A (zh) 10kV馈线短路试验方法
CN202433479U (zh) 一种大容量it电力并联回路接地故障定位装置
WO2012136241A1 (en) Fault handling during circuit breaker maintenance in a double-breaker busbar switchyard
CN205786965U (zh) 一种供电系统发电回路接地选线的装置和综合保护装置
CN104113049A (zh) 单相接地故障自愈系统
CN103018631A (zh) 10kV接地选线系统
CN204068225U (zh) 智能配电网自愈控制系统
Bjerkan Efficient fault management using remote fault indicators
CN110212511A (zh) 基于电阻异地自动投切的66kV消弧线圈接地系统

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
ASS Succession or assignment of patent right

Owner name: JIANGSU HONGAN TRANSFORMER CO., LTD.

Free format text: FORMER OWNER: JIANGSU ZHEN'AN POWER EQUIPMENTS CO., LTD.

Effective date: 20130911

Free format text: FORMER OWNER: WANG JINQUAN

Effective date: 20130911

C41 Transfer of patent application or patent right or utility model
C53 Correction of patent of invention or patent application
CB03 Change of inventor or designer information

Inventor after: Ye Xiaosong

Inventor after: Wang Jinquan

Inventor after: Wu Zhenfei

Inventor after: Xing Ming

Inventor after: Ding Jianxing

Inventor after: Tang Youhuai

Inventor after: Xu Ye

Inventor after: Shen Wei

Inventor after: Cui Chenhua

Inventor before: Ye Xiaosong

Inventor before: Wang Jinquan

Inventor before: Xing Ming

Inventor before: Ding Jianxing

Inventor before: Tang Youhuai

Inventor before: Xu Ye

Inventor before: Shen Wei

Inventor before: Cui Chenhua

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: YE XIAOSONG WANG JINQUAN XING MING DING JIANXING TANG YOUHUAI XU YE SHEN WEI CUI CHENHUA TO: YE XIAOSONG WANG JINQUAN WU ZHENFEI XING MING DING JIANXING TANG YOUHUAI XU YE SHEN WEI CUI CHENHUA

TA01 Transfer of patent application right

Effective date of registration: 20130911

Address after: 212028 Zhenjiang Industrial Park, Dantu New District, Jiangsu No. five weft Road, No. 18

Applicant after: JIANGSU HONGAN TRANSFORMER Co.,Ltd.

Address before: 212028 Zhenjiang Industrial Park, Dantu New District, Jiangsu No. five weft Road, No. 18

Applicant before: JIANGSU ZHENAN ELECTRIC POWER EQUIPMENT Co.,Ltd.

Applicant before: Wang Jinquan

C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
CB03 Change of inventor or designer information

Inventor after: Ding Jianxing

Inventor after: Ye Xiaosong

Inventor after: Wang Jinquan

Inventor after: Wu Zhenfei

Inventor after: Xing Ming

Inventor after: Tang Youhuai

Inventor after: Xu Ye

Inventor after: Shen Wei

Inventor after: Cui Chenhua

Inventor before: Ye Xiaosong

Inventor before: Wang Jinquan

Inventor before: Wu Zhenfei

Inventor before: Xing Ming

Inventor before: Ding Jianxing

Inventor before: Tang Youhuai

Inventor before: Xu Ye

Inventor before: Shen Wei

Inventor before: Cui Chenhua

COR Change of bibliographic data
TR01 Transfer of patent right

Effective date of registration: 20160822

Address after: 100070 general room, No. 6, Fengtai East Road, Beijing, Fengtai District

Patentee after: CHINESE PEOPLE'S LIBERATION ARMY NAVAL ENGINEERING DESIGN INSTITUTE

Patentee after: JIANGSU ZHENAN ELECTRIC POWER EQUIPMENT Co.,Ltd.

Patentee after: Wang Jinquan

Address before: 212028 Zhenjiang Industrial Park, Dantu New District, Jiangsu No. five weft Road, No. 18

Patentee before: JIANGSU HONGAN TRANSFORMER Co.,Ltd.

CB03 Change of inventor or designer information

Inventor after: Ding Jianxing

Inventor after: Ye Xiaosong

Inventor after: Wu Zhenfei

Inventor after: Xing Ming

Inventor after: Tang Youhuai

Inventor after: Shen Wei

Inventor after: Cui Chenhua

Inventor before: Ding Jianxing

Inventor before: Ye Xiaosong

Inventor before: Wang Jinquan

Inventor before: Wu Zhenfei

Inventor before: Xing Ming

Inventor before: Tang Youhuai

Inventor before: Xu Ye

Inventor before: Shen Wei

Inventor before: Cui Chenhua

CB03 Change of inventor or designer information
TR01 Transfer of patent right

Effective date of registration: 20210914

Address after: 6 Fengtai East Road, Fengtai District, Beijing 100070

Patentee after: 91053 unit of Chinese PLA

Patentee after: JIANGSU ZHENAN ELECTRIC POWER EQUIPMENT Co.,Ltd.

Address before: 100070 general office, No.6 Fengtai East Road, Fengtai District, Beijing

Patentee before: CHINESE PEOPLE'S LIBERATION ARMY NAVAL ENGINEERING DESIGN INSTITUTE

Patentee before: JIANGSU ZHENAN ELECTRIC POWER EQUIPMENT Co.,Ltd.

Patentee before: Wang Jinquan

TR01 Transfer of patent right
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20231127

Address after: 6 Fengtai East Road, Fengtai District, Beijing 100070

Patentee after: 91053 unit of Chinese PLA

Address before: 6 Fengtai East Road, Fengtai District, Beijing 100070

Patentee before: 91053 unit of Chinese PLA

Patentee before: JIANGSU ZHENAN ELECTRIC POWER EQUIPMENT Co.,Ltd.