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Recognition Method of Pantograph Arc Based on Current Signal Characteristics |
Wang Zhiyong1, 2, Guo Fengyi1, Feng Xiaoli1, Wang Yuting1, Chen Cheng1, 3 |
1. Faulty of Electrical and Control Engineering Liaoning Technical University Huludao 125105 China; 2. College of Safety Science and Engineering Liaoning Technical University Huludao 125105 China; 3. State Grid East Inner Mongolia Electric Power Corporation Limited Hohhot 010020 China |
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Abstract Pantograph arc has become a serious hidden trouble to the safety operation of train. It’s of great significance to recognize timely pantograph arc for evaluating current collection quality, controlling arc and guiding maintenance. Current collection experiments under different conditions were carried out. The current collection status was divided into normal collection status and arc collection status. A kind of on-time recognition method of pantograph arc based on current signal and support vector machine (SVM) was proposed. An engineering implementation method was briefly introduced. The mean value, standard deviation and correlation coefficient of current were selected by the improved F-score (I-F-score) algorithm as typical characteristics of pantograph arc. The SVM model was established by using svmtrain function with Matlab software and the parameters of radial basis function were optimized by using grid search method. Lots of testing results showed that the suggested method can identify pantograph arc effectively. Some factors such as contact pressure, sliding speed, contact current, arc duration and sample rate have certain effects on recognition accuracy. Arc duration has larger effect on the recognition accuracy. The longer the arc duration, the higher the recognition accuracy is.
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Received: 14 September 2016
Published: 16 January 2018
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