配电网单相接地故障区段定位技术研究
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摘要
油田配电网结构复杂,分支众多,覆盖面广,发生故障的几率相对较高。在配电网故障中绝大部分是单相接地故障,该故障发生后若不及时处理,容易扩大为相间短路。因此必须尽快找到故障线路,尽快排除故障。
本文根据配电网单相接地故障的特点提出了技术解决方案。在大庆油田配电系统现有的基于注入谐波原理的自动选线装置的基础上,开发单相接地故障区段定位功能。实现故障定位进行研究,完全靠装置自动地选出故障分支,并将接地的故障分支编号及时传送至调度中心,让调度人员及时知道故障位置,以便及时排除故障。
本文通过理论上的可辨识矩阵的自动故障算法和实验室的中性点不接地配电网仿真试验系统等方法的运用,从理论和仿真实验等方面解决了配电网单相接地故障区段定位的问题。
A relatively high probability of fault may occur, because of the complex structure, multiple branches and wide coverage of the oilfield distribution network. Most of the faults are the single phase grounding faults, if ignored, will be likely to expand to interphase short circuit. Find out the fault line and debug it as soon as possible is very important.
A technical solution is presented according to the features of the single phase grounding fault. A localization function is developed based on the current automatic fault line selector using harmonic injection method in Daqing Oilfield. Fault location, completely automatic fault branch election and timely transmission of the branch number to the control center which can let operators know about fault positions and debug in time are researched and realized.
The single phase grounding fault section location problem is resolved theoretically and experimentally, using theoretical auto fault algorithm of distinct matrix and experimental ungrounded neutral point distribution network simulation test system.
本文根据配电网单相接地故障的特点提出了技术解决方案。在大庆油田配电系统现有的基于注入谐波原理的自动选线装置的基础上,开发单相接地故障区段定位功能。实现故障定位进行研究,完全靠装置自动地选出故障分支,并将接地的故障分支编号及时传送至调度中心,让调度人员及时知道故障位置,以便及时排除故障。
本文通过理论上的可辨识矩阵的自动故障算法和实验室的中性点不接地配电网仿真试验系统等方法的运用,从理论和仿真实验等方面解决了配电网单相接地故障区段定位的问题。
A relatively high probability of fault may occur, because of the complex structure, multiple branches and wide coverage of the oilfield distribution network. Most of the faults are the single phase grounding faults, if ignored, will be likely to expand to interphase short circuit. Find out the fault line and debug it as soon as possible is very important.
A technical solution is presented according to the features of the single phase grounding fault. A localization function is developed based on the current automatic fault line selector using harmonic injection method in Daqing Oilfield. Fault location, completely automatic fault branch election and timely transmission of the branch number to the control center which can let operators know about fault positions and debug in time are researched and realized.
The single phase grounding fault section location problem is resolved theoretically and experimentally, using theoretical auto fault algorithm of distinct matrix and experimental ungrounded neutral point distribution network simulation test system.
引文
[1]袁进伶,张涛. 5~66kV电力系统电容电流自动跟踪补偿及接地选线装置原理及应用[J].中国电力,1998,31(1):67~68.
[2]庞华等.新型小电流接地系统微机消谐选线综合装置的原理及应用[J].电力情报,1994,(1):62~66.
[3]郝玉山等.MLN系列小电流接地微机选线装置动作原理[J].电力情报,1994,(2):7~11.
[4]王慧等.“S注入法”与选线定位[J].电力自动化设备,1999,19(3):18~20.
[5]曾祥君等.基于注入变频信号法的经消弧线圈接地系统控制与保护新保护[J].中国电机工程学报,2000,20(1):29~32,36.
[6]毛鹏等.小波包在配电网单相接地故障选线中的应用[J].电网技术,2000,24(6):9~13,17
[7]葛耀中.小波变换与继电保护技术[J].继电器,1998,26(4):1~6.
[8]操丰梅,苏沛埔.小波变换在配电自动化接地故障检测中的应用研究[J].电力系统自动化,1999,23(13):33~36.
[9]葛耀中.小波变换与继电保护技术[J].继电器,1998,26(4):1-6.
[10]操丰梅,苏沛埔.小波变换在配电自动化接地故障检测中的应用研究[J].电力系统自动化,1999,23(13):33-36.
[11]王建赜,李威等.解析信号小波分析及其在电力系统中的应用[J].电力系统自动化,2000,24(22):28-31.
[12]毛鹏.孙雅明等小波包在配电网单相接地故障选线中的应用[J].电网技术,2000,24(6):9-13.
[13]王慧等.“S注入法”与选线定位[J].电力自动化设备,1999,19(3):18-20.
[14]曾祥君,尹项根,于永源等.基于注入变频信号法的经消弧线圈接地系统控制与保护新保护[J].中国电机工程学报,2000,20(1):29-32,36.
[15]张树文,李文毅,米增强等.小电流接地系统单相接地保护原理和技术综述[J].电力情报,1994,(2):1-4.
[16]要焕年,曹梅月等.电力系统谐振接地[M].北京:中国电力出版社,2000.
[17]张艳霞,陈超英,赵杰辉等.配电网单相接地故障选线的一种新方法[J].电网技术,2002,26(10):21-24.
[18]戴剑锋,张艳霞.基于多频带分析的自适应配电网故障选线研究[J].中国电机工程学报,2003,23(5):44-47.
[19]戴剑锋,张艳霞,侯喆．小波重构算法在配电网接地选线中的应用[J].电网技术,2004,28(3):43-47.
[20]石勇,张艳霞,沈勇环.基于数字信号处理器和小波包重构算法的配电网接地选线装置的研究[J].电网技术,2005,29(4):50-54.
[21]石勇,张艳霞. CPLD在小电流接地选线装置中的应用[J].中国农村水利水电,2004(11):111-112.
[2]庞华等.新型小电流接地系统微机消谐选线综合装置的原理及应用[J].电力情报,1994,(1):62~66.
[3]郝玉山等.MLN系列小电流接地微机选线装置动作原理[J].电力情报,1994,(2):7~11.
[4]王慧等.“S注入法”与选线定位[J].电力自动化设备,1999,19(3):18~20.
[5]曾祥君等.基于注入变频信号法的经消弧线圈接地系统控制与保护新保护[J].中国电机工程学报,2000,20(1):29~32,36.
[6]毛鹏等.小波包在配电网单相接地故障选线中的应用[J].电网技术,2000,24(6):9~13,17
[7]葛耀中.小波变换与继电保护技术[J].继电器,1998,26(4):1~6.
[8]操丰梅,苏沛埔.小波变换在配电自动化接地故障检测中的应用研究[J].电力系统自动化,1999,23(13):33~36.
[9]葛耀中.小波变换与继电保护技术[J].继电器,1998,26(4):1-6.
[10]操丰梅,苏沛埔.小波变换在配电自动化接地故障检测中的应用研究[J].电力系统自动化,1999,23(13):33-36.
[11]王建赜,李威等.解析信号小波分析及其在电力系统中的应用[J].电力系统自动化,2000,24(22):28-31.
[12]毛鹏.孙雅明等小波包在配电网单相接地故障选线中的应用[J].电网技术,2000,24(6):9-13.
[13]王慧等.“S注入法”与选线定位[J].电力自动化设备,1999,19(3):18-20.
[14]曾祥君,尹项根,于永源等.基于注入变频信号法的经消弧线圈接地系统控制与保护新保护[J].中国电机工程学报,2000,20(1):29-32,36.
[15]张树文,李文毅,米增强等.小电流接地系统单相接地保护原理和技术综述[J].电力情报,1994,(2):1-4.
[16]要焕年,曹梅月等.电力系统谐振接地[M].北京:中国电力出版社,2000.
[17]张艳霞,陈超英,赵杰辉等.配电网单相接地故障选线的一种新方法[J].电网技术,2002,26(10):21-24.
[18]戴剑锋,张艳霞.基于多频带分析的自适应配电网故障选线研究[J].中国电机工程学报,2003,23(5):44-47.
[19]戴剑锋,张艳霞,侯喆．小波重构算法在配电网接地选线中的应用[J].电网技术,2004,28(3):43-47.
[20]石勇,张艳霞,沈勇环.基于数字信号处理器和小波包重构算法的配电网接地选线装置的研究[J].电网技术,2005,29(4):50-54.
[21]石勇,张艳霞. CPLD在小电流接地选线装置中的应用[J].中国农村水利水电,2004(11):111-112.