Analysis on fault phase selector for cross country fault of parallel transmission lines

被引：0
|
作者：
Xu H. [1 ]
Song G. [1 ]
Fan Z. [1 ,2 ]
机构：
[1] School of Electrical Engineering, Xi'an Jiaotong University, Xi'an
[2] XJ Group Corporation, Xuchang
来源：
Xu, Haiyang (xuhaiyang.2009@stu.xjtu.edu.cn) | 1600年 / Automation of Electric Power Systems Press卷 / 40期
关键词：
Cross country fault; Fault phase selector; Parallel lines; Thevenin's equivalent method; Zero-sequence mutual inductance;
D O I：
10.7500/AEPS20151031003
中图分类号：
学科分类号：
摘要：
Parallel transmission lines on the same corridor are commonly used in the transmission system. When a cross country fault occurs, the traditional fault phase selector may not correctly identify the fault phases due to the changes of fault characteristics. An algorithm for the calculation of the sequence currents at the fault point is proposed according to Thevenin's theorem and the sequence currents at the location of the protection relay are obtained with superposition principle. Finally, the formulas on the relation between sequence currents at the fault point are deduced. Based on the double-circuit transmission lines on the same tower without electrical connection at both ends, it is found that the applicability of the positive and negative sequence current phase selector is related to fault types under cross country non-earth fault conditions, while that under cross country earth fault conditions are related to fault types, mutual inductance as well as the ratio of equivalent zero sequence impedance and positive sequence impedance. In contrast, the phase selector based on the phase current difference change can correctly identify fault phases under different cross country fault conditions of parallel transmission lines on the same corridor. Simulation results based on the PSACD platform show that the analytical method for cross country fault is effective, and the analysis result of fault phase selector is correct. © 2016 Automation of Electric Power Systems Press.
引用
收藏
页码：165 / 171
页数：6
相关论文
共 14 条
  • [1] Song G., Xu H., Fan Z., Et al., A method for preventing mal-operation of zero-sequence direction component using current fault component, Automation of Electric Power Systems, 40, 2, pp. 114-120, (2016)
  • [2] Huang S., Liu X., Zhang P., Et al., Influence on distance protection caused by earthed cross-voltage fault in multi-circuit transmission lines system, Automation of Electric Power Systems, 40, 1, pp. 96-101, (2016)
  • [3] Li W., Bi T., Xu Z., Et al., First-zone distance relaying algorithm of parallel transmission lines for cross-country ground faults, Proceedings of the CSEE, 33, 7, pp. 131-138, (2013)
  • [4] Song G., Liu Z., Kang X., Et al., A scheme for ground distance protection of parallel transmission lines, Power System Protection and Control, 38, 12, pp. 102-106, (2010)
  • [5] Meng H., Zhu L., Zhang T., Analysis of overhead line fault and protection of double-circuit transmission lines, Automation of Electric Power Systems, 30, 18, pp. 103-107, (2006)
  • [6] Yu B., Yang Q., Li Y., Et al., Research on fault phase selector of protective relay for double-circuit lines on the same tower, Proceedings of the CSEE, 23, 4, pp. 38-42, (2003)
  • [7] Chen Q., Cai Z., Liu W., Et al., Influence of inter-line fault on phase selection element for parallel lines on same pole, Electric Power Automation Equipment, 30, 2, pp. 95-98, (2010)
  • [8] Yang Z., Song G., Yao Y., Et al., Fault phase selector of protective relay for cross country fault on double circuit lines, Journal of Xi'an Jiaotong University, 45, 2, pp. 97-101, (2011)
  • [9] Li Y., Liu Q., Huang S., A synthesis fault phase selector for double circuit lines on the same tower based on steady values, Relay, 35, pp. 63-67, (2007)
  • [10] Chen F., Qian G., Research on fault phase selector of protective relay for double circuit lines based on crossing-line fault identifying, Automation of Electric Power Systems, 32, 6, pp. 66-70, (2008)
12