同济大学学报（自然科学版）2012，Vol.40Issue(5)：744-750,7.DOI:10.3969/j.issn.0253-374x.2012.05.017
基于Rogowski谐振原理及小波能谱的暂态保护
Transient Protection Based on Rogowski Coil Resonance Theory and Wavelet Energy Spectrum
摘要
Abstract
The paper presents a new single terminal transient protection scheme for distribution network based on Rogowski coil resonance theory and wavelet energy spectrum. The transmission characteristics of transient signal of the line boundary were changed by introducing Rogowski coil resonance equipment, and the internal fault was distinguished from the external fault. Consequently, an immediate trip was realized among the distribution network. After determining the fault moment by wavelet modulus maxima, the high and low frequency band signals in the fault period were extracted so that a reliable protection criterion was obtainted by calculating ratio of high-frequency energy and lower-frequency energy. Finally, PSCAD/EMTDC simulation results prove the effectiveness of the proposed protection scheme, which is reliable to discriminate internal and external faults under different conditions.关键词
Rogowski/谐振原理/模极大值/小波能谱Key words
Rogowskis resonance theory/ wavelet modulus maxima/ wavelet energy spectrum分类
信息技术与安全科学引用本文复制引用
牟龙华,张鑫,朱吉然..基于Rogowski谐振原理及小波能谱的暂态保护[J].同济大学学报（自然科学版）,2012,40(5):744-750,7.基金项目
上海市教育委员会科研创新项目(11CXY12),国家火炬计划项目(2008GH040894) （11CXY12）
