电网技术2018，Vol.42Issue(1)：338-345,8.DOI:10.13335/j.1000-3673.pst.2017.1609
一种配电线路单端全线速动保护方案
A Whole-Line Quick-Action Protection Scheme for Distribution Lines Based on Single-End Electrical Parameters
宋国兵 1黄炜 1王晓卫 1常仲学 1董继民1
作者信息
- 1. 西安交通大学电气工程学院,陕西省西安市710049
- 折叠
摘要
Abstract
Independent of power supply property,single-ended quick-action protection,only related to line topology,is an important scheme to improve weak protection configuration of present distribution networks.This paper designs a type of boundary elements,namely the capacitors in parallel to bus,playing role of a compensation element at steady state and fault identification device during transient fault period.A method of whole-line quick-action protection for distribution lines is proposed based on single-end transient voltage energy extracted with wavelet decompositions associated with instantaneous currents.PSCAD simulation results prove that the method can quickly and reliably distinguish internal and external phase-to-phase faults in distribution lines with strong ability of enduring fault resistance.Meanwhile,the larger the boundary capacitance is,the more conducive will be to distinguish the faults,but its volume selection still depends on system operation requirements,and economic and other factors.关键词
配电线路/边界设计/单端信息/时域分析/全线速动Key words
distribution lines/boundary element design/single-end electrical parameter/time-domain analysis/whole-line quick-action protection分类
信息技术与安全科学引用本文复制引用
宋国兵,黄炜,王晓卫,常仲学,董继民..一种配电线路单端全线速动保护方案[J].电网技术,2018,42(1):338-345,8.
