一种改进的小电流接地故障定位方法
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摘要
针对基于暂态电流相似性的小电流接地系统故障定位方法所存在的,因电流互感器极性不明或反接时故障定位不准确的问题,在现有的小电流接地故障定位相关系数法的基础上分析了该故障定位法在实际工程中的定位盲区。将暂态零序分量与工频零序分量极性相结合,利用各检测点零序电流与工频零序电流极性的一致性解决现有相关系数法故障定位的盲区问题,提出一种改进的小电流接地故障定位方法。Matlab仿真验证了改进的小电流接地故障定位方法的可行性和准确性。
To improve the accuracy of fault location which was low due to unknown polarity of the current transformer or the reverse connection in the fault location based on the transient current similarity in the smll current grounded operation mode system, an improved fault location method was proposed. The new method combined transient zero sequence components with power frequency zero sequence component,and, using the compatibility of zero current and power frequency zero current, solved the problem of the fault zone in the correlation coefficient method in practical engineering application. The feasibility of the improved small current ground fault location method is verified by Matlab software simulation.
To improve the accuracy of fault location which was low due to unknown polarity of the current transformer or the reverse connection in the fault location based on the transient current similarity in the smll current grounded operation mode system, an improved fault location method was proposed. The new method combined transient zero sequence components with power frequency zero sequence component,and, using the compatibility of zero current and power frequency zero current, solved the problem of the fault zone in the correlation coefficient method in practical engineering application. The feasibility of the improved small current ground fault location method is verified by Matlab software simulation.
引文
[1]胡杨,张陆陆,梁婧晨.基于行波理论的多端故障定位方法研究[J].电网与清洁能源,2013,29(7):52-57.
[2] 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方法 [J] .中国电机工程学报,2000,20(1):30-33,37.
[3] 罗梅,杨洪耕.配电网故障定位的一种改进通用矩阵算法[J].电力系统保护与控制,2012,40(5):64-68.
[4]齐郑,乔丰,黄哲洙,等.基于暂态分量遗传算法的小电流接地故障定位方法[J].电力系统保护与控制,2014,42(1):34-39.
[5]张林利,徐丙垠,薛永端,等.基于线电压和零模电流的小电流接地故障暂态定位方法[J].中国电机工程学报,2012,32(13):110-115,198.
[6]薛永端,张海台,李成刚,等.小电流接地故障暂态选线与定位技术[J].供用电,2015,32(4):32-37,45.
[7]赵波,李鹏,童杭伟,等.从分布式发电到微网的研究综述[J].浙江电力,2010,29(3):1-5.
[8]谢成,金涌涛,胡叶舟,等.基于相关系数分析的配电网单相接地故障研判方法与试验研究[J].浙江电力,2017,36(3):17-23.
[9]薛永端,李天友,李伟新,等.小电流接地故障暂态分析及区段定位新方法[J].电力系统自动化,2014,38(23):101-107.
[10]刘谋海,方涛,姜运,等.基于高频分量相关度分析的故障选线方法[J].电力系统及其自动化学报,2017,29(2):101-106,128.
[11]薛永端,李娟,徐丙垠.中性点经消弧线圈接地系统小电流接地故障暂态等值电路及暂态分析[J].中国电机工程学报,2015,35(22):5 703-5 714.
[12]郭丽伟,薛永端,徐丙垠,等.中性点接地方式对供电可靠性的影响分析[J].电网技术,2015,39(8):2 340-2 345.
[13]刘柱揆,曹敏,董涛.基于波形相似度的小电流接地故障选线[J].电力系统保护与控制,2017,45(21):89-95.
[14]姜博,董新洲,施慎行.基于单相电流行波的配电线路单相接地故障选线方法[J].中国电机工程学报,2014,34(34):6 216-6 227.
[15]姜博,董新洲,施慎行.配电网单相接地故障选线典型方法实验研究[J].电力自动化设备,2015,35(11):67-74.
[2] 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方法 [J] .中国电机工程学报,2000,20(1):30-33,37.
[3] 罗梅,杨洪耕.配电网故障定位的一种改进通用矩阵算法[J].电力系统保护与控制,2012,40(5):64-68.
[4]齐郑,乔丰,黄哲洙,等.基于暂态分量遗传算法的小电流接地故障定位方法[J].电力系统保护与控制,2014,42(1):34-39.
[5]张林利,徐丙垠,薛永端,等.基于线电压和零模电流的小电流接地故障暂态定位方法[J].中国电机工程学报,2012,32(13):110-115,198.
[6]薛永端,张海台,李成刚,等.小电流接地故障暂态选线与定位技术[J].供用电,2015,32(4):32-37,45.
[7]赵波,李鹏,童杭伟,等.从分布式发电到微网的研究综述[J].浙江电力,2010,29(3):1-5.
[8]谢成,金涌涛,胡叶舟,等.基于相关系数分析的配电网单相接地故障研判方法与试验研究[J].浙江电力,2017,36(3):17-23.
[9]薛永端,李天友,李伟新,等.小电流接地故障暂态分析及区段定位新方法[J].电力系统自动化,2014,38(23):101-107.
[10]刘谋海,方涛,姜运,等.基于高频分量相关度分析的故障选线方法[J].电力系统及其自动化学报,2017,29(2):101-106,128.
[11]薛永端,李娟,徐丙垠.中性点经消弧线圈接地系统小电流接地故障暂态等值电路及暂态分析[J].中国电机工程学报,2015,35(22):5 703-5 714.
[12]郭丽伟,薛永端,徐丙垠,等.中性点接地方式对供电可靠性的影响分析[J].电网技术,2015,39(8):2 340-2 345.
[13]刘柱揆,曹敏,董涛.基于波形相似度的小电流接地故障选线[J].电力系统保护与控制,2017,45(21):89-95.
[14]姜博,董新洲,施慎行.基于单相电流行波的配电线路单相接地故障选线方法[J].中国电机工程学报,2014,34(34):6 216-6 227.
[15]姜博,董新洲,施慎行.配电网单相接地故障选线典型方法实验研究[J].电力自动化设备,2015,35(11):67-74.