Analysis of Ground Fault in DC System and Exploration to the Countermeasures
The types and harms of DC system ground fault is introduced, ground fault in ll0V DC system resulting in a generator unit breakdown accident in a power plant is analyzed,the state before the accident, accident process is described, the reason analysis of the accident and several kinds of improving measurements are put forward.Finally a kind of DC system ground protection based on power electronics technology is presented.The protection system can not only effectively isolate ground fault, but also have step-up and stabilizing voltage function to avoid switch trip when DC voltage drops.To a certain extent, it improves power supply reliability of DC system.
DC system Ground fault Generator unit breakdown Power electronics Protection
Bingwei Yu Li Wang Wenbo Chen
Liaoning Qinghe Power Generation Co., Ltd. Golden Cooperate information & automation technology Co., Ltd. Goklen Cooperate information & automation technology Co., Ltd.
国际会议
南京
英文
947-950
2015-09-21（万方平台首次上网日期，不代表论文的发表时间）