Research on Space Vector PWM Synchronous Overmodulation in Rail Transit Traction System
Chen Jie1, Li Jun1, Qiu Ruichang1, Xu Chunmei1, Liu Zhigang2
1. School of Electric Engineering Beijing Jiaotong University Beijing 100044 China; 2. Beijing Rail Transit Electrical Engineering Technology Research Center Beijing 100044 China
Abstract：The rail transit traction system has a wide operating speed range and high stability requirements, which makes the traction system should have a smooth transition from asynchronous modulation to square wave. The usual solution is to adopt a hybrid pulse width modulation strategy. At present, there are two commonly used hybrid pulse width modulation strategies, one is to use a non-carrier modulation to connect asynchronous modulation and square wave, and the other is to adopt a synchronous overmodulation strategy to connect asynchronous modulation and square wave. In this paper, the advantages and disadvantages of these two methods are analyzed. For the synchronous overmodulation strategy, the traditional asynchronous overmodulation and synchronous over- modulation are introduced. Combined with the defects of the traditional method, this paper proposes an advanced synchronous space vector pulse width modulation (SVPWM) overmodulation strategy. Finally, through simulation and experiment, it is proved that the advanced synchronous SVPWM overmodulation strategy has the advantages of simple implementation and no ripple in the transition period.
陈杰, 李军, 邱瑞昌, 徐春梅, 刘志刚. 轨道交通牵引系统空间矢量脉宽调制同步过调制策略研究[J]. 电工技术学报, 2020, 35(zk1): 91-100.
Chen Jie, Li Jun, Qiu Ruichang, Xu Chunmei, Liu Zhigang. Research on Space Vector PWM Synchronous Overmodulation in Rail Transit Traction System. Transactions of China Electrotechnical Society, 2020, 35(zk1): 91-100.
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2020, Vol. 35 
