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. By monitoring busbar voltage signal...

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Bibliographic Details
Main Authors: Mingjun Wang, Houlei Gao, Guibin Zou, Ronghua Yang, Feng Zhu, Bing Li
Format: Conference Proceeding
Language:English
Subjects:
fault
Fault diagnosis
Harmonic analysis
invading wave
Lightning
lightning stroke
main harmonic
S-transform
Time frequency analysis
Transforms
Transient analysis
Online Access:Request full text
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Summary: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. By monitoring busbar voltage signals in 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 established. PSCAD simulation results have tested the validity and correctness of this proposed method.
DOI:10.1109/DRPT.2011.5994195