TY - JOUR
T1 - The fault detection, localization, and tolerant operation of modular multilevel converters with an Insulated Gate Bipolar Transistor (IGBT) open circuit fault
AU - Li, Wei
AU - Li, Gengyin
AU - Zeng, Rong
AU - Ni, Kai
AU - Hu, Yihua
AU - Wen, Huiqing
N1 - Publisher Copyright:
© 2018 by the authors.
PY - 2018/4
Y1 - 2018/4
N2 - Reliability is one of the critical issues for a modular multilevel converter (MMC) since it consists of a large number of series-connected power electronics submodules (SMs). In this paper, a complete control strategy including fault detection, localization, and tolerant operation is proposed for the MMC under an insulated gate bipolar transistor (IGBT) open circuit fault. According to the output characteristics of the SM with the open-circuit fault of IGBT, a fault detection method based on the circulating current and output current observation is used. In order to further precisely locate the position of the faulty SM, a fault localization method based on the SM capacitor voltage observation is developed. After the faulty SM is isolated, the continuous operation of the converter is ensured by adopting the fault-tolerant strategy based on the use of redundant modules. To verify the proposed fault detection, fault localization, and fault-tolerant operation strategies, a 900 kVA MMC system under the conditions of an IGBT open circuit is developed in the Matlab/Simulink platform. The capabilities of rapid detection, precise positioning, and fault-tolerant operation of the investigated detection and control algorithms are also demonstrated.
AB - Reliability is one of the critical issues for a modular multilevel converter (MMC) since it consists of a large number of series-connected power electronics submodules (SMs). In this paper, a complete control strategy including fault detection, localization, and tolerant operation is proposed for the MMC under an insulated gate bipolar transistor (IGBT) open circuit fault. According to the output characteristics of the SM with the open-circuit fault of IGBT, a fault detection method based on the circulating current and output current observation is used. In order to further precisely locate the position of the faulty SM, a fault localization method based on the SM capacitor voltage observation is developed. After the faulty SM is isolated, the continuous operation of the converter is ensured by adopting the fault-tolerant strategy based on the use of redundant modules. To verify the proposed fault detection, fault localization, and fault-tolerant operation strategies, a 900 kVA MMC system under the conditions of an IGBT open circuit is developed in the Matlab/Simulink platform. The capabilities of rapid detection, precise positioning, and fault-tolerant operation of the investigated detection and control algorithms are also demonstrated.
KW - Circulating current
KW - Fault detection
KW - Fault localization
KW - Fault-tolerant operation
KW - Modular multi-level converter
KW - Output current observation
UR - http://www.scopus.com/inward/record.url?scp=85045435759&partnerID=8YFLogxK
U2 - 10.3390/en11040837
DO - 10.3390/en11040837
M3 - Article
AN - SCOPUS:85045435759
SN - 1996-1073
VL - 11
JO - Energies
JF - Energies
IS - 4
M1 - 837
ER -