摘要
分析了当WXB 11型微机线路保护应用在带小电源的线路时 ,重合闸拒动的原因。由于小电源与电网脱离 ,成为独立系统 ,其容量较小 ,难以维持系统电压 ,以致系统电压衰减 ,其衰减周期较长 ,致使重合闸检无压条件难以成立。通过调整重合闸开放时间 ,解决检无压判据过早返回的问题 。
The cause of the reclosure failure of WXB?11 line protection is analyzed when it is applied with local power source.Because the local power source is disconnected from power net and becomes an independent system itself,the system capacity is small and the system voltage can not be maintained.It causes system voltage wane with a longer wane wheel and then the reclosure criterion unsatisfied.The problem is solved by adjusting the reclosure time to improve no voltage criterion.It is applied to practice.
出处
《电力自动化设备》
EI
CSCD
北大核心
2001年第2期48-49,共2页
Electric Power Automation Equipment
