电力系统保护与控制2012，Vol.40Issue(15)：132-135,4.
基于电子式互感器的R-L模型距离保护应用研究
Application of R-L model distance protection based on ECT
倪传坤 1张克元 1杨生苹 1刘瑞云2
作者信息
- 1. 许继电气股份有限公司,河南许昌461000
- 2. 河南省电力公司新乡供电公司调通中心,河南新乡453000
- 折叠
摘要
Abstract
Based on the perfect transmit characteristics of ECT in the smart substation, the transmission line time-domain differential equation model is established, zero sequence current at the protection installment point is used to simulate ground fault current to enhance the measurement accuracy. Simulation verifies that the R-L model has high accuracy, fast response speed and strong bearing ability to transition resistance. In respect to the steady-state overreach of simulation model, this paper uses zero-sequence parameters characteristics on both sides of the fault point to carry on phase compensation of zero sequence current. Simulation results show that the improved R-L model has high precision when metallic fault occurs and strong bearing ability to the transition resistance at near-end fault, and effectively solve problems of the overreach of end fault. This paper finally introduces the application of R-L model based distance protection in the smart substation.关键词
智能变电站/距离保护/电子式互感器/R-L模型/稳态超越Key words
smart substation/distance protection/ECT/R-L model/steady-state overreach分类
信息技术与安全科学引用本文复制引用
倪传坤,张克元,杨生苹,刘瑞云..基于电子式互感器的R-L模型距离保护应用研究[J].电力系统保护与控制,2012,40(15):132-135,4.
