摘要
提出了基于正交小波的发电机定子单相接地保护新方法 ,即利用经小波变换后机端和中性点侧三次谐波电压的局部模极大值符号特性是否相同来识别定子接地故障。仿真结果表明 ,该方案在各种运行方式下均能取得很高的灵敏度 ,满足现代大型发电机组继电保护的要求。
A new stator grounded fault protection scheme based on wavelet transform is presented in this paper. With the comparison of the polarity of local maxima of the 3rd harmonic zero sequence voltages between the generator neutral and terminals, the new approach can find the grounded fault sensibly. Simulation results show that the scheme can obtain the high sensitivity which the huge generator requires during all operating conditions. This project is supported by the National Key Scientific and Technical Project of the Ninth Five-Year Plan (97-312-06-2-2a) and the Fund of Transcenturies Excellent Personnel Training Program of National Education Committee of China.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第1期34-37,共4页
Automation of Electric Power Systems
基金
"九五"重大科技攻关项目! (97- 312 - 0 6 - 2 - 2 a)
国家教委跨世纪优秀人才培养计划基金
关键词
发电机
单相接地保护
正交小波
继电保护
电力系统
Computer simulation
Electric fault currents
Electric potential
Harmonic analysis
Stators
Wavelet transforms
