摘要
备自投装置是提高电力系统供电可靠性的重要设备,文中由一起110 kV变电站进线故障、35 kV备自投拒动案例引发了对110 kV三圈变变电站备自投过负荷闭锁逻辑的思考,指出其中不足,提出了"求和整组闭锁法"和"先投后切法",这2种方法能够根据实际负荷情况作出正确的备自投动作决策,可以有效避免备自投拒动的发生,优化了110 kV三圈变变电站备自投过负荷闭锁逻辑,有效地提高了地区电网运行的安全性和供电可靠性。
The automatic bus transfer equipment is important to improve the reliability of the power system.The research focuses on the overload blocking logic of automatic bus transfer in 110 kV substation with three winding transformer failing to operate in a line fault of 110 kV substation caused by 35 kV automatic bus transfer.The drawback of the overload blocking logic is pointed out in this paper.Summation and entire group lockout method and removing after the operating method are proposed.These two methods are designed to make the right operation decisions for automatic bus transfer according to the load and to avoid automatic bus transfer failing to operate.The optimized overload blocking logic of automatic bus transfer in 110 kV substation with three winding transformer can efficiently improve the security and reliability of regional power network.
出处
《江苏电机工程》
2013年第4期35-37,共3页
Jiangsu Electrical Engineering
关键词
110KV变电站
备自投
三圈变
过负荷闭锁
继电保护
110 kV substation
automatic bus transfer
three winding transformer
overload blocking
relay protection
