Transactions of China Electrotechnical Society  2019, Vol. 34 Issue (18): 3873-3883    DOI: 10.19595/j.cnki.1000-6753.tces.L80014
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A Fast Open Circuit Fault Diagnosis and Location Strategy for Three-Phase Bridgeless Power Factor Corrector
Chen Wenbo, Cheng Hong, Wang Cong
School of Mechanical Electronic & Information EngineeringChina University of Mining & Technology Beijing 100083 China

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Abstract  In order to improve the reliability and safety of three-phase bridgeless PFC, open circuit fault mechanism and fault characteristic were analyzed. Considering the problems of numerous fault states and sparse feature samples, a novel method based on K-nearest neighbor algorithm is proposed for open circuit fault diagnosis and location. Three-phase input currents are taken as the characteristic variables, and the fault features are extracted by coordinate transformation and similarity analysis. Then the K-nearest neighbor algorithm based on normalized Manhattan distance is used to identify different fault modes. The feasibility has been verified by simulation and experimental results. The proposed method implements a high sampling rate for online real-time diagnosis with higher diagnosis accuracy and faster diagnostic time. It is also robust to some special conditions such as load mutation and harmonic interference.
Key wordsThree-phase bridgeless PFC      online fault diagnosis and location      K-nearest-neighbor (KNN) algorithm      hardware-in-loop simulation     
Received: 06 April 2018      Published: 26 September 2019
PACS: TM46  
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Chen Wenbo
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Chen Wenbo,Cheng Hong,Wang Cong. A Fast Open Circuit Fault Diagnosis and Location Strategy for Three-Phase Bridgeless Power Factor Corrector[J]. Transactions of China Electrotechnical Society, 2019, 34(18): 3873-3883.
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