广东电力2016，Vol.29Issue(7)：101-104,4.DOI:10.3969/j.issn.1007-290X.2016.07.020
基于负荷电流补偿的负序方向保护改进算法
Improved Algorithm for Negative Sequence Directional Protection Based on Load Current Compensation
李欧1
作者信息
- 1. 广东电网有限责任公司东莞供电局，广东 东莞 52300
- 折叠
摘要
Abstract
Working conditions of open-phase operation and open-phase fault operation of the power system may cause impact on correct action of negative sequence directional protection. When voltage transformer (VT)is installed at the bus side and the power system is under open-phase operation condition,mal-operation of negative sequence directional elements will be caused. While it is able to correctly identify negative sequence directional elements during open-phase fault operation. In al-lusion to these problems,a new kind of modified scheme for negative sequence directional protection is presented which is to add load current compensation to offset negative sequence current in the system under the condition of open-phase operation and ensure effective no-action of negative sequence directional protection. Meanwhile,under the condition of open-phase fault operation,it is able to effectively identify negative sequence protection. Simulation results of PSCAD and MATLAB indicate that the new protection scheme has good practicability under various working conditions of open-phase operation of power transmission lines.关键词
非全相/再发生故障/负序方向保护/补偿电流Key words
open-phase/open-phase fault/negative sequence directional protection/compensation current分类
信息技术与安全科学引用本文复制引用
李欧..基于负荷电流补偿的负序方向保护改进算法[J].广东电力,2016,29(7):101-104,4.
