220kV馈供线路接地距离保护零序补偿系数选择  

Selection of Zero-sequence Compensation Coefficient for Grounding-fault Distance Protection of 220 kV Feeders

作　　者：倪菁[1] 董祖晨[1] 

机构地区：[1]常州供电公司,江苏常州213003

出　　处：《供用电》2009年第1期39-41,共3页Distribution & Utilization

摘　　要：根据线路接地距离保护中的零序补偿系数的常规计算方法,推导了220 kV馈供线路接地距离保护中的零序补偿系数,分析了零序补偿系数对接地距离保护测量阻抗的影响。通过对实例的定量计算,提出了对220kV馈供线路接地距离保护中零序补偿系数整定计算时应考虑支接变压器阻抗的影响。According to conventional calculation of zero-sequence compensation coefficient for grounding-fault distance protection, the paper derives the zero-sequence compensation coefficient for grounding-fault distance protection of 220 kV feeders, analyzes the impact of zero-sequence compensation coefficient on the measuring impedance of grounding-fault distance protection. Based on the calculation of an example, the paper suggests that it should take the transformer impedance into consideration during the calculation of zero-sequence compensation coefficient for grounding-fault distance protection of 220 kV feeders.

关 键 词：馈供线路 接地距离保护 零序补偿系数 

分 类 号：TM752[电气工程—电力系统及自动化]