考虑不对称故障的10kV备用电源自动投入装置控制策略研究  

Control Strategy Research for 10 kV Backup Automatic Switch Considering of Unsymmetrical Fault

作　　者：刘仁恭[1] 杨欢欢[2] 杨程[1] 蔡泽祥[2] 

机构地区：[1]广东电网公司东莞供电局,广东东莞5230082 [2]华南理工大学电力学院,广东广州510640

出　　处：《广东电力》2013年第1期104-109,共6页Guangdong Electric Power

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.

关 键 词：单元接线 电气特征 备用电源自动投入装置 策略 

分 类 号：TM46[电气工程—电器] TP29[自动化与计算机技术—检测技术与自动化装置]