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| The method for detecting weak faults in transmission lines |
| Wang Feng |
| College of Electric Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002 |
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Abstract The majority of faults on the transmission line can cause intense travelling wave signals, which can be easily detected by the protection device. However, in some cases, or due to the restriction of the decoupling matrix, the fault signal on the line is very weak. Combined with the influence of some high-frequency signals, the fault signal that can be detected is very limited. The protection based on traveling wave will not capture the fault signal accurately, resulting in the miss operation. In this paper, through a large number of simulations, the traveling wave characteristics of such weak fault signals are analyzed, and the methods for identifying such faults have been put forward. The Matlab/Simulink simulation experiments verify the feasibility of the method.
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Received: 11 December 2017
Published: 19 June 2018
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2018, Vol. 19 
