Disturbance Identification Method for Lightning Wave Invading Grid
Lightning stroke on line may lead to mal-operation of relay protection,possibly invades substation,and further results in over-voltage of system.A S-transform based method for monitoring and identifying lightning inrush in substations is proposed in this paper paper.By monitoring busbar voltage signals in real real-time,the waveform characteristics of transient voltage signals in both time domain and frequency domain are extracted using S-transform technique.According to the amplitude difference between main harmonic and fundamental frequency of voltages,a discrimination criterion for general fault,lightning stroke with and without fault is establish established.ed.PSCAD CAD simulation results have test tested ed the validity and correctness of this proposed method.
S-transform:lightning stroke stroke:invading wave:mainharmonic:fault
Mingjun Wang Houlei Gao Guibin Zou Ronghua Yang Feng Zhu Bing Li
School of Electrical Engineering Shandong University Jinan,China Shandong Electric Power Corporation Jinan,China
国际会议
威海
英文
1825-1829
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）