电力系统自动化2019，Vol.43Issue(1)：228-233,6.DOI:10.7500/AEPS20180506005
采用形态学峰谷检测的谐振接地系统故障选线方法
Fault Line Selection in Resonant Earthed System Based on Morphological Peak-Valley Detection
摘要
Abstract
Transient electrical quantity information is very abundant when single-phase grounding fault occurs in resonant earthed system.The short window data of 1/4 period of zero sequence current fault of each line are transformed by wavelet transform.The frequency band of power frequency is eliminated and the feature frequency band is selected according to the principle of maximum energy sum.The reconstructed wavelet coefficients under the feature frequency band are checked by morphological peak-valley detection.The peak-valley characteristic of the fault feeder is opposite to that of the total feeders, which is used as the fault line selection criterion.The simulation analysis and practical verification demonstrate the feasibility and effectivity of this method.关键词
谐振接地系统/故障选线/暂态分量/峰谷检测/数学形态学/特征频带Key words
resonant earthed system/fault line selection/transient component/peak-valley detection/mathematical morphology/feature band引用本文复制引用
束洪春,黄海燕,田鑫萃,董俊,黄然..采用形态学峰谷检测的谐振接地系统故障选线方法[J].电力系统自动化,2019,43(1):228-233,6.基金项目
国家自然科学基金资助项目(51667010) This work is supported by National Natural Science Foundation of China (No. 51667010). （51667010）
