电力系统自动化2011，Vol.35Issue(3)：54-58,5.
基于故障分量的相位相关电流差动保护
Phase Correlation Current Differential Protection Based on Fault Comoonent
摘要
Abstract
Current differential protection (DP) based on Kirchhoffs current law is widely used as a main protection for various power system devices. Due to influence of load current, fault component based current DP has distinct advantages on removing load current influence and enhancing ability to endure transient resistance. The amplitude and phase characteristics of two-terminal fault currents are analyzed and the principle of phase correlation current DP based on fault component is proposed. The differential principle among proposed protection, conventional percentage DP and product-restraint DP is compared. Analysis results show the proposed principle is able to guarantee reliability of external fault and sensitivity of internal fault as well. And influence of current transformer saturation on DP is also analyzed. Finally, theoretical analysis and simulation tests demonstrate that the principle proposed has good operation performance.This work is supported by Special Fund of the National Basic Research Program of China (No. 2009CB219704), National High Technology Research and Development Program of China (863 Program) (No. 2007AA05Z241) and National Natural Science Foundation of China (No. 50977061).关键词
电流差动保护/电流相位差/电流互感器饱和/过渡电阻Key words
current differential protection (DP)/ current phase difference/ eurrent transformer saturation/ transient resistance引用本文复制引用
李斌,曾红艳,范瑞卿,薄志谦..基于故障分量的相位相关电流差动保护[J].电力系统自动化,2011,35(3):54-58,5.基金项目
国家重点基础研究发展计划(973计划)资助项目(2009CB219704) （973计划）
国家高技术研究发展计划(863计划)资助项目(2007AA05Z241) （863计划）
国家自然科学基金资助项目(50977061). （50977061）
