Abstract：The three-phase three-level DC-DC converter is very suitable for high input voltage and high output current power conversion applications. Its characteristics of multi-module interleaved- parallel combination can significantly improve the reliability of the operation. To highlight the advantage, we should execute the redundancy and fault tolerance. This paper firstly analyzed the impact of the interleaved angle on the redundancy and fault tolerance, the best value of the interleaved angle was calculated. Then a novel method to achieve redundancy and fault tolerance was proposed based on the voltage-current double-closed-loop proportional-integral (PI) control plus regulating the interleaved angle. This method was implemented in a distributed control system based on ring net communication, which guaranteed the equality and current balance among all modules, and realized the redundant and fault tolerant operation of the converter. The proposed method is validated by experimental results of a MW-level prototype.
杨国润, 肖飞, 范学鑫, 王瑞田, 刘计龙. 中压大容量三重化三电平直流变换器冗余容错控制[J]. 电工技术学报, 2017, 32(增刊1): 186-195.
Yang Guorun, Xiao Fei, Fan Xuexin, Wang Ruitian, Liu Jilong. Redundant and Fault Tolerant Control of a Medium-Voltage High-Power Three-Phase Three-Level DC-DC Converter. Transactions of China Electrotechnical Society, 2017, 32(增刊1): 186-195.
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2017, Vol. 32 
