电力系统自动化2017，Vol.41Issue(13)：125-132,8.DOI:10.7500/AEPS20161114004
配电网馈线零序电流随过补偿度动态调节的变化特性分析
Analysis on Zero-sequence Current Variation Characteristic for Feeders of Distribution Network at Different Residual Current Compensation Factors
唐金锐 1杨晨 2程利军3
作者信息
- 1. 武汉理工大学自动化学院,湖北省武汉市 430070
- 2. 南京磐能电力科技股份有限公司,江苏省南京市 210032
- 3. 武汉电力职业技术学院,湖北省武汉市 430079
- 折叠
摘要
Abstract
Zero-sequence current variation characteristics of faulty and healthy distribution feeders with different fault resistances and earth capacities during the changing process of residual current compensation factors are analyzed.Firstly, the relational expression for zero-sequence current is given.Secondly, zero-sequence current variation curves of distribution feeders are presented for multi-parameter scenarios with residual current compensation factor varying in over-compensation, under-compensation and whole regions.The results show that once single-line-to-ground fault through resistance occurs, the zero-sequence current variation characteristic of faulty feeder is consistent with that of healthy feeder under the following conditions: ①residual current compensation factor is less than zero but greater than the opposite number of the ratio of faulty feeder's ground capacitance to total ground capacitance of all feeders;②fault resistance is greater than the boundary value which is inversely proportional to the ground capacitance of the feeder while the residual current compensation factor is greater than zero.The analysis results provide an important theoretical basis to the remnant current increment method.关键词
零序电流/消弧线圈/故障选线/故障定位/配电网Key words
zero-sequence current/arc-suppressing coil/faulty feeder identification/fault location/distribution network引用本文复制引用
唐金锐,杨晨,程利军..配电网馈线零序电流随过补偿度动态调节的变化特性分析[J].电力系统自动化,2017,41(13):125-132,8.
