Abstract In order to diminish the influence of unbalanced and nonlinear loads on the output voltage quality of three-phase inverter in practical applications and further improve the dynamic characteristic under different load switching, modeling method based on generalized state space average and a novel control strategy based on inductor current moving average are proposed. Based on generalized state space averaging method, an accurate model of inverter with balanced load and design of PI controller in the dq0 synchronous rotating coordinate is analyzed in detail. Moreover, inductor current moving averaging method is presented, adjusting the PI controller applicable to three-phase unbalanced and nonlinear loads. Compared with conventional method, the proposed model and control strategy can preferably improve dynamic characteristics under different load switching. Moreover, it can guarantee the balance of three-phase voltages with mixed loads.
Ma Hao,Lin Zhao,Wang Xiaorui. Modeling and Control of Three-Phase Inverter Powering Unbalanced and Nonlinear Loads[J]. Transactions of China Electrotechnical Society, 2015, 30(18): 83-95.
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2015, Vol. 30 
