Journal of Shandong University(Engineering Science) ›› 2021, Vol. 51 ›› Issue (1): 76-86.doi: 10.6040/j.issn.1672-3961.0.2020.416

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  1. 1. School of Electrical Engineering, Shandong University, Jinan 250100, Shandong, China;
    2. State Grid Shandong Electric Power Company, Jinan 250061, Shandong, China;
    3. College of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, Shandong, China;
    4. Tai'an Power Supply Company, State Grid Shandong Electric Power Company, Taian 271000, Shandong, China
  • Published:2021-03-01

Abstract: This paper proposed a method to calculate an active power coefficient of the zero-sequence signal in the frequency band below 80 Hz. The coefficient was defined the ratio of active to apparent power within a fixed time window. This method identified the fault direction through the polarity and absoluted value of the coefficient. Digital simulation and actual fault recordings data had verified the feasibility of the proposed method, which could trip reliably for high impedance faults, and avoid the current transformer error.

Key words: low current earth fault, active power coefficient, frequency band, intermittent fault, zero-sequence current transformer

CLC Number: 

  • TM771
[1] 潘本仁,宋华茂,张秋凤,等. 小电流接地故障无功功率分析及选线新方法[J].电力系统保护与控制,2017,45(14):51-56. PAN Benren, SONG Huamao, ZHANG Qiufeng, et al. Reactive power analysis and novel faulty selection method in resonant earthing system[J]. Power System Protection and Control, 2017, 45(14):51-56.
[2] 薛永端,冯祖仁,徐丙垠,等. 基于暂态零序电流比较的小电流接地选线研究[J]. 电力系统自动化,2003,27(9):48-53. XUE Yongduan, FENG Zuren, XU Bingyin, et al. Earth fault protection in non-solidly earthed network based on transient zero sequence current comparison[J]. Auto-mation of Electric Power System, 2003, 27(9):48-53.
[3] 薛永端,陈羽,徐丙垠,等. 利用暂态特征的新型小电流接地故障监测系统[J]. 电力系统自动化,2004,28(24):83-87. XUE Yongduan, CHEN Yu, XU Bingyin, et al. A new type of small current Earth fault monitoring system using transient characteristics [J]. Auto-mation of Electric Power System, 2004, 28(24):83-87.
[4] 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):3-8. 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):3-8.
[5] 李猷民,吕守国,周洋,等. 利用超定方程组的行波故障定位新方法[J]. 山东大学学报(工学版),2018,48(6):95-100. LI Youmin, LV Shouguo, ZHOU Yang, et al. A New method for traveling wave fault location using overdetermined equation system[J]. Journal of Shangdong University(Engineering Science), 2018, 48(6):95-100.
[6] 邵健,魏佩瑜,陈平,等.基于组合行波测距原理的T型线路测距方法[J].山东大学学报(工学版),2018,48(1):117-123. SHAO Jian, WEI Peiyu, CHEN ping, et al. T-type line distance measuring method based on combined traveling wave ranging principle[J]. Journal of Shangdong University(Engineering Science), 2018, 48(1):117-123.
[7] 牟龙华.零序电流有功分量方向接地选线保护原理[J]. 电网技术,1999,23(9):60-62. MU Longhua. Principle of selective earthing fault protection based on active component direction of zero-sequence current[J]. Power System Technology,1999, 23(9):60-62.
[8] 徐丙垠. 配电网继电保护与自动化[M]. 北京:中国电力出版社,2015.
[9] 要焕年. 电力系统谐振接地[M]. 北京:中国电力出版社,2015.
[10] 李志军,王娟,张珈玮,等. 阻尼电阻投切方式对消弧线圈残流及残流时间的影响[J]. 天津大学学报(自然科学与工程技术版),2018,51(2):143-149. LI Zhijun, WANG Juan, ZHANG Jiawei, et al. Influence of rapidly removing damping resistance on residual current and residual time of arc suppression coil[J]. Journal of Tianjin University(Science and Technology), 2018, 51(2):143-149.
[11] 滕昊. 带阻尼电阻的谐振接地系统电容电流精确测量方法[J]. 电力科学与技术学报,2017,32(1):97-102. TENG Hao. Accurate measurement method of capacitive cur-rent in resonant Earthing system with damping resistance[J]. Power Sicence and Technology, 2017, 32(1):97-102.
[12] 何奔腾,金华烽,李菊.能量方向保护原理和特性研究[J].中国电机工程学报,1997,6(1):23-27. HE Benteng, JIN Huafeng, LI Ju. Research on principle and characteristics of energy direction protection[J]. Proceedings of the CSEE, 1997, 6(1):23-27.
[13] 曹团结,张剑,尹项根,等.电流互感器的误差分析与工程计算[J].电力自动化设备,2007,27(1):53-56. CAO Tuanjie, ZHANG Jian, YIN Xianggen, et al. Error analysis and engineering calculation of current transformer[J]. Electric Power Automation Equipment, 2007, 27(1):53-56.
[14] 薛永端,李娟,陈筱薷,等.谐振接地系统高阻接地故障暂态选线与过渡电阻辨识[J]. 中国电机工程学报,2017,37(17):5037-5048. XUE Yongduan, LI Juan, CHEN Xiaorui, et al. Faulty feeder selection and transition resistance identification of high impedance fault in a resonant grouding system using transient signals[J]. Proceedings of the CSEE, 2017, 37(17):5037-5048.
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