摘要
(上接2005年第5期P34)
3.2.3主变压器低压侧接地保护动作问题
该保护是在发电机出口开关断开时,作为主变压器低压侧、厂用变压器高压侧及相应的离相封闭母线的接地保护.
According to the summary of Operation and commissioning of microcomputer protection for large generator - transformer bank and auxiliary transformer in phase 2 of Qinshan, the existent problems of the microcomputer protection were analyzed, including self- holding of outlet of generator -transformer bank, diflerential protection of main transformer, differential protection of 500 kV side, suppression device of secondary harmonics. Analysis on the causes of miss operation and its corresponding countermeasures are put forward, and the suggestions to improve the method of frequency measurement, record wave file and alarm lamp are presented.
出处
《电力设备》
2005年第6期34-36,共3页
Electrical Equipment