电力系统自动化Issue(11)：58-63,82,7.DOI:10.7500/AEPS20140529008
交直流互联系统对距离保护动作特性的影响分析及对策
Effect Analysis of AC/DC Interconnected Network on Distance Protection Performance and Countermeasures
摘要
Abstract
The transient process caused by commutation failure in an AC/DC interconnected system is not the same as that of the purely AC system,which affects the performance of distance protection that uses the fundamental frequency.The transient characteristic of equivalent power-frequency current on the inverter side is analyzed first by introducing the concept of quadrant. Then,the effect of commutation failure on distance protection is studied in detail by considering the connection mode of relay. The analysis results show that the fault position and fault resistance both significantly influence the performance of distance protection.Furthermore,novel countermeasures based on the zero-sequence directional component and the successive trip used for measuring the change of reactance are put forward. Simulation results based on PSCAD/EMTDC have proved the conclusion correct. This work is supported by National Basic Research Program of China(973 Program)(No.2012CB21 5206).关键词
换相失败/距离保护/过渡电阻/零序方向元件/“纵续”动作Key words
commutation failure/distance protection/transition resistance/zero-sequence directional component/successive trip引用本文复制引用
申洪明,黄少锋,费彬..交直流互联系统对距离保护动作特性的影响分析及对策[J].电力系统自动化,2015,(11):58-63,82,7.基金项目
国家重点基础研究发展计划(973计划)资助项目(2012CB215206)。 （973计划）
