摘要
对某风电场低压侧电缆短路故障时变压器后备保护的复压闭锁方向过流保拒动原因进行了分析。改进过流保护定值后,通过理论分析和带负荷试验验证方向过流保护动作正确性。
The case why complex-voltage-blocking directional over-current protection of transformer backup protection had miss operation when one wind farm low voltage side cable fault occurred is analysized.Theoretical analysis and on-load test verified the directional over-current protection action after improved the relay setting.
出处
《电力科学与工程》
2012年第1期50-54,共5页
Electric Power Science and Engineering
关键词
变压器保护
继电保护
后备保护
过流保护
transformer protection
microcomputer-based relay protection
back up protection
over-current protection
