The Modulation and Control Strategy of Storage Inductance Current for Single-Phase Current Source Inverter
Miao Yiru1, Liu Heping1, Wang Huabin2, Wang Mengmeng1
1. State Key Laboratory of Power Transmission Equipment & System Security and New TechnologyChongqing University Chongqing 400044 China;
2. School of Electrical and Information Engineering Chongqing University of Science and Technology Chongqing 401331 China
In PWM process, the DC storage inductance current of traditional single-phase current source inverter (CSI) is usually considered constant and the charge-discharge process is ignored in a modulation cycle, causing the increase of storage inductance current discontinuous or continuous. The DC-side topology of single-phase CSI was improved in this paper. Working mode of storage inductance was thoroughly analyzed in modulation process. The least limited value of storage inductance current was derived under each working condition, and the modulation strategy was designed to maintain storage inductance current constant for improved topology. By introducing the virtual current and voltage of AC-side, the mathematical model of single-phase CSI was derived in two-phase rotating reference frame, and the closed-loop control strategy of output voltage was designed. Both the simulation and experimental results show that the least limited value of storage inductance current can meet the demand of AC-side and maintain within a certain range. Besides, output voltage of CSI can accurately follow the given value. Thus, the proposed modulation strategy and control method are verified.
苗轶如, 刘和平, 王华斌, 王蒙蒙. 单相电流源型逆变器储能电感电流优化调制及控制策略[J]. 电工技术学报, 2018, 33(6): 1227-1237.
Miao Yiru, Liu Heping, Wang Huabin, Wang Mengmeng. The Modulation and Control Strategy of Storage Inductance Current for Single-Phase Current Source Inverter. Transactions of China Electrotechnical Society, 2018, 33(6): 1227-1237.
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2018, Vol. 33 
