摘要
阐述了大容量发电机定子接地保护的要求,描述了金安桥水力发电厂20 Hz电源注入式定子接地保护原理的构成,并详细介绍了注入式保护与传统的双频式定子接地保护相比较的优势;结合金安桥水电站的实际运行说明中性点接地变压器变比大小、接地变二次电阻值与定子单相接地保护灵敏度的相互配合的意义。
The stator ground protection based on injecting 20 Hz power source signal for Jin＇anqiao Hydropower Station was introduced, and the injected-type and traditional dual-frequency protections were compared. The actual operation of Jin＇anqiao Hydropower Station shows that the matches between the ratio of neutral transformer, the ground resistance and the sensitivity of stator single-phase ground protection are important for stator ground protection.
出处
《水力发电》
北大核心
2011年第1期80-82,共3页
Water Power
关键词
20
Hz电源
注入式
接地电流
配电变压器
定子接地保护
20 Hz power source
injected-type
grounding current
distribution transformer
stator ground protection
