摘要
介绍了110 kV变电站线变组单元接线方式以及10 kV备用电源自动投入装置(以下简称备自投)的运行环境。建立模型并详细分析了110 kV进线发生不对称故障时变低10 kV母线的电气特征,利用10 kV母线电压信息,探讨了基于电压不平衡度的备自投投退策略,并分析了基于负序电压不平衡度的投退策略,以提高备自投动作的灵敏度。
This paper introduces unit connection of line-transformer set of 110 kV substation and operational environment for 10 kV backup automatic switch. It establishes model and analyzes electric characteristic of 10 kV bus at low pressure side of transformer when happening unsymmetrical fault. By using 10 kV bus voltage information, it discusses retreating strategy of backup automatic switch based on degree of unbalance of voltage and analyzes retreating strategy based on degree of unbal- ance of negative sequence voltage in order to promote sensitivity of backup automatic switch.
出处
《广东电力》
2013年第1期104-109,共6页
Guangdong Electric Power
关键词
单元接线
电气特征
备用电源自动投入装置
策略
unit connection
electric characteristic
backup automatic switch
strategy
