电网技术2012，Vol.36Issue(5)：190-197,8.
多串补线路保护动作性能分析
Analysis on Protection Performance of Transmission Line With Multi Series Compensation Capacitors
王兴国 1杜丁香 1周春霞 1余越1
作者信息
- 1. 中国电力科学研究院 北京市海淀区100192
- 折叠
摘要
Abstract
The post-fault characteristics of electrical quantities in transmission line with multi series compensation capacitors are theoretically analyzed. With the change of fault location, voltage reversal and current reversal will occur in different places along the transmission line, so multi low-frequency transient components exist in the post-fault electrical quantities. Based on the analysis on protection performance of current differential protection and distance protection for transmission line with series compensation capacitors, a protection configuration scheme for this transmission line is proposed and two improvement suggestions are given: one of which is adopting the memory voltage as the polarization voltage for distance protection to prevent the malfunction of distance protection due to voltage reversal; anther of which is recognizing current reversal by comparing the phase of fault current with the phase of memory voltage, when the phase of post-fault current takes lead in the phase of memory voltage, the current reversal is confirmed and the current differential protection must be locked. The RTDS based simulation of 1000W transmission line with multi series compensation capacitors is performed, and simulation results conform to that of theoretical analysis.关键词
多串补线路/电压反相/电流反相/低频分量/分相电流差动保护/正序极化距离保护Key words
transmission line with multi series compensation capacitors/ voltage reversal/ current reversal/ low frequency component/ phase-segregated current differential protection/ positive-sequence polarized distance protection分类
信息技术与安全科学引用本文复制引用
王兴国,杜丁香,周春霞,余越..多串补线路保护动作性能分析[J].电网技术,2012,36(5):190-197,8.
