Abstract：In vector controlled three phase three level unidirectional PWM rectifier, the exact inductor value of smoothing chock is needed, however, in compact rectifier, when iron dust core is used, the inductance is varied under different input currents, input voltages and output loads, this variation resulted in nonlinear current loop response and control parameters in digital implementation. So it is difficult to meet the demands of power factor and THD of current when in the condition of wide input voltage range and variable inductance. This paper, by analysis the modeling and current loop transfer function of rectifier, an optimized design of proportion in PI current controller is presented in order to reduce the effect of variable inductor value. Then the controller designing rules are derived with the help of current loop mode. This strategy ensures lower harmonic current and improves the power factor in full load and full range input voltage. Simulation and experimental results verify the feasibility and effectiveness of the proposed control strategy.
何礼高, 陈鑫兵. 变电感参数三电平不可逆PWM整流器的电流PI优化控制[J]. 电工技术学报, 2011, 26(7): 203-209.
He Ligao, Chen Xinbing. Optimized PI Current Controller of Three Level Unidirectional PWM Rectifier Under Variable Inductance. Transactions of China Electrotechnical Society, 2011, 26(7): 203-209.
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2011, Vol. 26 
