唐昆明;唐辰旭;罗建;

• 1:输配电装备及系统安全与新技术国家重点实验室(重庆大学)

摘要(Abstract)：

在零序电压、电流中,暂态分量的衰减时间常数及频率与故障距离相关,其值可由象函数特征方程的根表示。分析了该函数与故障距离的关系,提出了一种基于特征根的单端测距方法。该方法结合拉氏变换与双曲函数线路模型,由零序电压、电流象函数的特征方程,得到了象函数测距方程,同时,利用特征频段(SFB)的性质,提出了该测距方程在SFB内的等效形式,通过Prony算法,从采样信息中提取SFB内的特征根,采用搜索法求解超越方程,实现了故障测距。该单端测距方法可准确得到故障距离的解析表达式,且克服了传统双曲函数模型不能用于暂态计算的问题。大量的EMTP仿真实验结果验证了该方法的正确性,不受过渡电阻、故障初始角、中性点运行方式的影响,能够满足实际工程需求。

关键词(KeyWords)： 单相接地;暂态特征;特征频段;拉氏变换;特征根;单端测距

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 唐昆明;唐辰旭;罗建;

Email:

DOI: 10.13335/j.1000-3673.pst.2014.03.033

参考文献(References)：

• [1]朱声石.高压电网继电保护原理与技术[M].北京:中国电力出版社,2005:59-80.
• [2]马士聪,高厚磊,徐丙垠,等.配电网故障定位技术综述[J].电力系统保护与控制,2009,37(11):119-124.Ma Shicong,Gao Houlei,Xu Bingyin,et al.A survey of fault location methods in distribution network[J].Power System Protection and Control,2009,37(11):119-124(in Chinese).
• [3]董新洲,毕见广.配电线路暂态行波的分析和接地选线研究[J].中国电机工程学报,2005,25(4):1-6.Dong Xinzhou,Bi Jianguang.Analysis on transient traveling wave and study on fault line selection for distribution lines[J].Proceedings of the CSEE,2005,25(4):1-6(in Chinese).
• [4]薛永端,段晶晶,徐丙垠,等.直供方式牵引网故障行波特征分析[J].电网技术,2012,36(4):167-173.Xue Yongduan,Duan Jingjing,Xu Bingyin,et al.Characterstic analysis of fault generated traveling waves in direct feeding traction network[J].Power System Technology,2012,36(4):167-173(in Chinese).
• [5]张永健,胥杰,孙嘉.基于静态小波变换的T型输电线路行波测距方法[J].电网技术,2012,36(6):84-88.Zhang Yongjian,Xu Jie,Sun Jia.Travelling wave fault location for three-terminal transmission line based on static wavelet transform[J].Power System Technology,2012,36(6):84-88(in Chinese).
• [6]季涛,孙同景,徐丙垠,等.配电混合线路双端行波故障测距技术[J].中国电机工程学报,2006,29(19):89-95.Ji Tao,Sun Tongjing,Xu Bingyin,et al.Study on fault location of distribution mixed feeders based on double terminal method of traveling waves[J].Proceedings of the CSEE,2006,29(19):89-95(in Chinese).
• [7]Gilany M,Ibrahim D.Traveling wave based fault location scheme for multiend-aged underground cable system[J].IEEE Transactions on Power Delivery,2007,22(1):82-89.
• [8]张新慧.基于Prony算法的小电流接地故障暂态选线技术[D].济南:山东大学.2008.
• [9]姜杰,王鹏,黄正炫,等.基于改进线路参数模型的配网电缆单相接地测距方法研究[J].电网技术,2012,36(5):185-189.Jiang Jie,Wang Peng,Huang Zhengxuan,et al.A fault location method study for distribution network cable single-phase earth fault based on improved line parameter model[J].Power System Technology,2012,36(5):185-189(in Chinese).
• [10]索南加乐,王增超,康小宁,等.基于线性微分方程参数识别的单端准确故障测距算法[J].电力自动化设备,2011,31(12):9-14.Suonan Jiale,Wang Zengchao,Kang Xiaoning,et al.Accurate fault location algorithm based on parameter identification of linear differential equation with single end data[J].Electric Power Automation Equipment,2011,31(12):9-14(in Chinese).
• [11]邬林勇,何正友,钱清泉.一种提取行波自然频率的单端故障测距方法[J].中国电机工程学报,2008,28(10):69-75.Wu Linyong,He Zhengyou,Qian Qingquan.A single ended fault location method using traveling wave natural frequency[J].Proceedings of the CSEE,2008,28(10):69-75(in Chinese).
• [12]Tawfik M M,Morcos M M.ANN-based techniques for estimating fault location on transmission lines using Prony method[J].IEEE Trans on Power Delivery,2001,16(2):219-224.
• [13]郑涛,潘玉美,郭坤亚,等.基于节点阻抗矩阵的配电网故障测距算法[J].电网技术,2013,37(11):3233-3240.Zhen tao,Pan Yumei,Guo Kunya,et al.A nodal impedance matrix based fault location algorithm for distribution network[J].Power System Technology,2013,37(11):3233-3240(in Chinese).
• [14]卢继平,徐兵.基于小波包能量相对熵的配电网单相接地故障区段定位[J].电力系统保护与控制,2012,40(20):26-31.Lu Jiping,Xu Bing.Single-phase earth fault section location based on wavelet packet energy relative entropy in distribution network[J].Power System Protection and Control,2012,40(20):26-31(in Chinese).
• [15]束洪春,彭仕欣.基于短窗数据S变换能量的缆-线配电网络故障选线方法[J].电工技术学报,2009,24(10):152-159.Shu Hongchun,Peng Shixin.A fault line detection algorithm for distribution network of overhead line and underground cable mixed lines using S transform energy from short window data[J].Transactions of China Electrotechnical Society,2009,24(10):152-159(in Chinese).
• [16]张林利,徐丙垠,薛永端,等.基于线电压和零模电流的小电流故障暂态定位方法[J].中国电机工程学报,2012,32(13):110-115.Zhang Linli,Xu Binyin,Xue Yongduan,et al.Transient fault location method based on line voltage and zero-mode current in non-solidly network[J].Proceedings of the CSEE,2012,32(13):110-115(in Chinese).
• [17]薛永端.基于暂态特征信息的配电网单相接地故障检测研究[D].西安:西安交通大学,2003.
• [18]张永健,胥杰,孙嘉.基于静态小波变换的T型输电线路行波测距方法[J].电网技术,2012,36(6):84-88.Zhang Yongjian,Xu Jie,Sun Jia.Travelling wave fault location for three-terminal transmission line based on static wavelet transform[J].Power System Technology,2012,36(6):84-88(in Chinese).