摘要
提出了一种基于小波变换的超高速暂态方向母线保护。它利用小波变换提取母线内外部故障时的暂态特征,通过比较母线各回路暂态电压、电流小波变换输出波形的相似性实现母线内外部故障的准确、快速识别。通过EMTP对实际电网大量的仿真计算,验证了所提原理的正确性和有效性。
A novel transient based, directional comparison ultra-high-speed bus protection scheme is proposed. In this scheme, wavelet transform technique is applied to extract transient characteristics of internal and external fault of a bus. It identifies an internal fault by comparing the similarities of wavelet transform waveforms of transient voltages and currents in all circuits connected to the bus. The EMTP simulation shows that the proposed scheme is correct and effective.
出处
《继电器》
CSCD
北大核心
2003年第6期13-18,共6页
Relay
