基于广义S变换能量相对熵的小电流接地系统故障区段定位方法

Abstract
Figure/Table
References
Related Citation (3)

Download: PDF (9870 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Single-phase earth fault occurs in small current neutral grounding system, which generates relatively abundant electrical transient characteristic. Transient zero sequence currents on both sides of the healthy section have high similarity, while both sides of the fault section show a great discrepancy. Thus, a fault section location method based on energy relative entropy of generalized S-transform is proposed. First, taken transient zero sequence current as fault feature, the starting time of the various detection devices to upload data is determined by the zero sequence current fault component. Thereafter, the generalized S-transform for the transient zero sequence current uploaded by various devices on feeders is carried out, and then the time-frequency matrix is obtained. Finally, the difference between the signals on both sides of various sections is represented by energy relative entropy. Through calculation and comparison, the section of maximum entropy is fault section. This method is suitable for different fault positions, fault angles and transition resistances. Simulation results verify the proposed method.

Key words： Small current neutral grounding system, fault section location, generalized S-transform, energy relative entropy

Received: 10 August 2016 Published: 02 May 2017

PACS:

TM77

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	He Lianjie
	Shi Changkai
	Yan Zhuo
	Cui Jiarui
	Zhang Bo

Cite this article:

He Lianjie,Shi Changkai,Yan Zhuo等. A Fault Section Location Method for Small Current Neutral Grounding System Based on Energy Relative Entropy of Generalized S-Transform[J]. Transactions of China Electrotechnical Society, 2017, 32(8): 274-280.

URL:

https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I8/274

[1] 束洪春. 配电网络故障选线[M]. 北京: 机械工业出版社, 2008.
[2] 高志鹏, 张慧芬, 孙旭娜. 注入半波直流的小电流接地故障选线定位方法[J]. 电力系统保护与控制, 2013, 41(13): 139-145.
Gao Zhipeng, Zhang Huifen, Sun Xuna. A method of fault line selection and fault point location with half- wave DC injection in distribution network[J]. Power System Protection and Control, 2013, 41(13): 139-145.
[3] 梁睿, 杨学君, 薛雪, 等. 零序分布参数的单相接地故障精确定位研究[J]. 电工技术学报, 2015, 30(12): 472-479.
Liang Rui, Yang Xuejun, Xue Xue, et al. Study of accurate single-phase grounding fault location based on distributed parameter theory using data of zero sequence components[J]. Transactions of China Electrotechnical Society, 2015, 30(12): 472-479.
[4] 唐金锐, 尹项根, 张哲, 等. 零模检测波速度的迭代提取及其在配电网单相接地故障定位中的应用[J]. 电工技术学报, 2013, 28(4): 202-212.
Tang Jinrui, Yin Xianggen, Zhang Zhe, et al. Iterative extraction of detected zero-mode wave velocity and its application in single phase-to-ground fault location in distribution networks[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 202-212.
[5] 马士聪, 徐丙垠, 高厚磊, 等. 检测暂态零模电流相关性的小电流接地故障定位方法[J]. 电力系统自动化, 2008, 32(7): 48-52.
Ma Shicong, Xu Bingyin, Gao Houlei, et al. Examining correlation of transient zero mode currents[J]. Automation of Electric Power System, 2008, 32(7): 48-52.
[6] 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.
Xue Yongduan, Li Tianyou, Li Weixin, et al. A novel method of transient analysis and faulty section location for single-phase earth fault in non- effectively earthed network[J]. Automation of Elec- tric Power System, 2014, 38(23): 101-107.
[7] 康忠健, 田爱娜, 冯艳艳, 等. 基于零序阻抗模型故障特征的含分布式电源配电网故障区间定位方法[J]. 电工技术学报, 2016, 31(10): 214-221.
Kang Zhongjian, Tian Aina, Feng Yanyan, et al. Fault section location method based on zero sequence impedance model fault feature in distribution network with distributed generators[J]. Transactions of China Electrotechnical Society, 2016, 31(10): 214-221.
[8] 刘鹏辉, 黄纯. 基于动态时间弯曲距离的小电流接地故障区段定位方法[J]. 电网技术, 2016, 40(3): 952-957.
Liu Penghui, Huang Chun. A fault section location method for small-current grounding fault in distribution network based on dynamic time warping distance[J]. Power System Technology, 2016, 40(3): 952-957.
[9] 童宁, 余梦琪, 林湘宁, 等. 基于相电流高频特征识别的配电网故障指示器原理[J]. 电工技术学报, 2015, 30(12): 465-471.
Tong Ning, Yue Mengqi, Lin Xiangning, et al. Study for fault indicator based on the fault phase current feature recognition for the distribution network[J]. Transactions of China Electrotechnical Society, 2015, 30(12): 465-471.
[10] 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.
[11] 郭凤仪, 李坤, 陈昌垦, 等. 基于小波近似熵的串联电弧故障识别方法[J]. 电工技术学报, 2016, 31(24): 164-172.
Guo Fengyi, Li Kun, Chen Changken, et al. Series arc fault identification method based on wavelet approxi- mate entropy[J]. Transactions of China Electro- technical Society, 2016, 31(24): 164-172.
[12] 王晓卫, 田书, 李玉东, 等. 基于S变换特征频率序列的小电流接地系统故障区段定位方法[J]. 电力系统保护与控制, 2012, 40(14): 109-115.
Wang Xiaowei, Tian Shu, Li Yudong, et al. A novel fault section location method for small current neutral grounding system based on characteristic frequency sequence of S-transform[J]. Power System Protection and Control, 2012, 40(14): 109-115.
[13] Stockwell R G, Mansinha L, Lowe R P. Localization of the complex spectrum: the S transform[J]. IEEE Transactions on Signal Processing, 1996, 44(4): 998- 1001.
[14] 张钧, 何正友, 贾勇. 基于S变换的故障选线新方法[J]. 中国电机工程学报, 2011, 31(10): 109-115.
Zhang Jun, He Zhengyou, Jia Yong. Fault line identification approach based on S-transform[J]. Proceedings of the CSEE, 2011, 31(10): 109-115.
[15] Pinnegar C R, Mansinha L. Time-local spectral analysis for non-stationary time series: the S-transform
for noisy signals[J]. Fluctuation and Noise Letters, 2003, 3(3): 357-364.
[16] 李小鹏, 何正友, 武骁. 基于S变换能量相对熵的高压输电线路极性比较式纵联保护[J]. 电网技术, 2014, 38(8): 2250-2256.
Li Xiaopeng, He Zhengyou, Wu Xiao. Polarity comparison pilot protection based on S-transform energy relative entropy for high voltage transmission lines[J]. Power System Technology, 2014, 38(8): 2250-2256.
[17] 黄南天, 徐殿国, 蔡国伟. 采用自适应广义S变换与概率神经网络的电能质量扰动识别[J]. 电工技术学报, 2013, 28(1): 209-216.
Huang Nantian, Xu Dianguo, Cai Guowei. Identi- fication of power quality disturbances based on adaptive generalized S-transform and probabilistic neural networks[J]. Transactions of China Electro- technical Society, 2013, 28(1): 209-216.
[18] 束洪春, 彭仕欣. 基于短窗数据S变换能量的缆-线混合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.