Open-Switch Fault Diagnosis Algorithm and Tolerant Control Method of the Three-Phase Three-Level NPC Active Rectifier

Jun-Hyung Jung, Hyun-Keun Ku, Yung-Deug Son and Jang-Mok Kim
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Jun-Hyung Jung: Department of Electrical and Computer Engineering, Pusan National University, Busan 46241, Korea
Hyun-Keun Ku: Converter Station Construction Team, Korea Electric Power Corporation, Naju, Jeollanam-do 58322, Korea
Yung-Deug Son: Department of Mechanical Facility Control Engineering, Korea University of Technology and Education, Cheonan, Chungnam 31253, Korea
Jang-Mok Kim: Department of Electrical and Computer Engineering, Pusan National University, Busan 46241, Korea

Energies, 2019, vol. 12, issue 13, 1-17

Abstract: This paper proposes a fault diagnosis and tolerant control methods for an open-switch fault caused in a three-phase three-level neutral-point-clamped (NPC) pulse-width modulation (PWM) active rectifier. The open-switch fault in the three-level NPC active rectifier causes a distortion in the input phase current and a ripple in the DC-link capacitor voltage. Therefore, proper fault diagnosis and tolerant control methods are required to prevent additional failures and performance degradation in the rectifier system. This paper conducted a detailed analysis of the effect of the single open-switch fault on the NPC PWM active rectifier and proposed a fault diagnosis method utilizing the DC link voltage and the phase angle of the input grid voltage. Furthermore, this paper proposes a fault-tolerant control method to reduce the effect of the open-switch fault by compensating a distorted reference voltage. The effectiveness of the proposed fault diagnosis and tolerant control methods are verified through experimental results.

Keywords: three-level neutral-point clamped (NPC) active rectifier; open-switch fault; fault diagnosis and tolerant control method; space vector modulation (SVM) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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