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为了减小有源电力滤波器(APF)的开关应力和损耗,便于实现用低耐压开关器件提高APF功率等级,提出了一种基于30°～390°区间矢量模式单周控制三相三线制三电平APF。APF主电路采用二极管钳位型三电平拓扑结构,控制策略采用矢量模式单周控制。推导建立了所提出的APF数学模型和控制目标方程,详细分析了系统稳定性和PI调节器设计,并比较了30°～390°区间和0°～360°区间矢量模式单周控制的区别和联系。最后对APF工作于三相电源平衡和不平衡时的情况分别进行了仿真和实验研究,研究结果表明所提出的APF能有效地补偿系统谐波和无功电流,补偿性能好,验证了所提出的控制方法的可行性和有效性。
In order to reduce the switching stress and loss of active power filter (APF), and to improve the power level of APF with low withstand voltage switching devices, a three-phase three-wire control system based on 30 ° ~ 390 ° interval vector mode Three-level APF. APF main circuit using diode-clamped three-level topology, the control strategy using vector control mode a week. The proposed APF mathematical model and control objective equation are deduced. The stability of the system and PI regulator design are analyzed in detail. The differences between the single-cycle control of the vector pattern in the range of 30 ° ~ 390 ° and 0 ° ~ 360 ° are also compared. contact. Finally, the simulation and experimental research on the APF work in the three-phase power balance and unbalance are carried out. The results show that the proposed APF can effectively compensate the harmonic and reactive current of the system, and the compensation performance is good. The feasibility and effectiveness of the control method.