摘要
分析了外加电源内部电阻对定子接地保护的影响 ,比较导纳判据和电流判据的优缺点 ,探讨保护灵敏度与外加电源频率和发电机中性点接地方式之间的关系。在此基础上 ,提出切换频率式定子接地保护方案 ,提高了保护灵敏度和可靠性。
The paper analyze the influence of the internal resistance of injection voltage source on the stator ground protection.And the conductance criterion and the current criterion are compared,the relations of protection sensitivity with voltage frequency and the grounding method are presented.Based on that,frequency switching scheme is introduced,which has higher sensitivity and reliability.
出处
《电工技术杂志》
2000年第8期10-12,3,共4页
Electrotechnical Journal
关键词
发电机
切换频式定子
灵敏度
接地保护
generator stator ground fault injection voltage sensitivity frequentcy
