电网技术2013，Vol.37Issue(2)：551-556,6.
基于电流波形曲率的短路故障快速识别方法
A Method to Fast Recognize Short-Circuit Fault Based on Curvature of Line Current Waveform
杨尚瑾 1武守远 1戴朝波1
作者信息
- 1. 中电普瑞科技有限公司,北京市昌平区102200
- 折叠
摘要
Abstract
With rapid development of power grids in China, the fact that short-circuit currents exceed specified limits becomes a troubled problem. Fault current limiter (FCL) can restrict short-circuit current under the prerequisite of not changing power flow distribution in power grid, so it possesses a good application prospect. It is one of key factors influencing the application effect of FCL to recognize short-circuit fault rapidly and accurately. Based on the feature that there is abrupt change of line current during the short-circuit fault, a method to rapidly recognize fault current by use of curvature of line current waveform is proposed. An equivalent system of FCL used in 500kV East China power grid is built by PSCAD software, and the fast fault signal recognition method based on the curvature of line current waveform is simulated by the built system. Simulation results show that the proposed method possesses the ability of recognizing abrupt change of line current and the recognition speed is fast. Finally, simulation results are verified by on-site recorded fault data come from controllable series compensation for a UHVAC transmission system project.关键词
故障电流限制器/故障电流/快速识别/线路电流Key words
fault current limiter/ fault current/ fast identification/ curvature of line current waveform分类
信息技术与安全科学引用本文复制引用
杨尚瑾,武守远,戴朝波..基于电流波形曲率的短路故障快速识别方法[J].电网技术,2013,37(2):551-556,6.
