电力系统保护与控制2012，Vol.40Issue(3)：100-104,5.
基于小波变换的HVDC输电系统故障诊断研究
Research on HVDC transmission system fault analysis based on wavelet transform
宋志明 1霍永红 1荀堂生 1王莉 1高湛军 2丛伟 2崔昊 1付兆远2
作者信息
- 1. 山东省电力学校,山东泰安271000
- 2. 山东大学电气工程学院,山东济南250061
- 折叠
摘要
Abstract
A complete electromagnetic transient model of HVDC (High Voltage Direct Current) system is built on the basis of PSCAD/EMTDC. A lot of typical faults for HVDC transmission system are simulated in the model. A large amount of typical fault information is extracted with the method of wavelet transform. When the faults occur inside and outside protection section of HVDC system, polarities of transient current and transition resistances affect transient current signal polarity identification, and the effect is analyzed. For two electrodes system, under the state of coupling relationship of voltage, the fault electrode is confirmed by voltage variation. A transient protection based on wavelet transform for HVDC transmission lines is proposed. Simulation results show that such protection criterion can detect fault locations accurately. It has high sensitivity for faults with high transition resistance, and its requirements are very low for communication channels.关键词
系统故障/线路保护/小波变换/极性识别/电压变化量Key words
system fault/ line protection/ wavelet transform/ polarity identification/ voltage variation分类
信息技术与安全科学引用本文复制引用
宋志明,霍永红,荀堂生,王莉,高湛军,丛伟,崔昊,付兆远..基于小波变换的HVDC输电系统故障诊断研究[J].电力系统保护与控制,2012,40(3):100-104,5.
