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- Title
基于波形相关性的混压同塔四回线故障选相新方案.
- Authors
郑 涛; 于 溯; 吴建云; 罗美玲
- Abstract
In order to solve the problem of complicated fault situation of mixed-voltage four-circuit lines on same tower and the problem that single-line fault phase selection method cannot be applied during crossvoltage fault,a new phase selection scheme based on waveform correlation is proposed. According to the change of the phase angle and amplitude of the fault phase current,the waveform autocorrelation coefficient and the improved autocorrelation coefficient are respectively proposed. To prevent the occurrence of misselection of phase in the strong magnetic coupling scene,the current sequence components of various faults are summarized,then the current sequence component-assisted phase selection is proposed to re-determine the possible mis-selection phase. Based on PSCADï¼EMTDC,a large number of simulations are carried out for various faults of lines on same tower with mixed-voltage,and the simulative results verify the feasibility of the proposed fault phase selection scheme.
- Publication
Electric Power Automation Equipment / Dianli Zidonghua Shebei, 2020, Vol 40, Issue 11, p138
- ISSN
1006-6047
- Publication type
Article
- DOI
10.16081/j.epae.202008014