一种新型的有源电力滤波器直接功率控制方法

摘要

This paper proposes a novel APF constant frequency direct power control approach. The approach adopts source power to control APF, omits the load detection and calculation part, improves the control reliability and reduces the cost. And it adopts constant frequency DPC to achieve constant switch frequency and high-dynamic. Moreover, it analyzes the relationship between DC link voltage and power loss and APF compensation, then adopts the droop controller to achieve a comprehensive optimization between active power loss and the compensation performance of APF. Simulation results prove the validity and feasibility of the control approach.%　　提出了一种新型的有源电力滤波器恒频直接功率控制方法，该算法直接采用电源功率对APF进行控制，从而省略了负载谐波和无功的检测及计算环节，提高了控制的可靠性、降低了成本；采用恒频直接功率控制保证了开关频率固定，提高了系统的动态性。另外分析了直流侧电压与功率损耗以及补偿能力之间的关系，应用下垂控制器获得直流侧电压控制参考值，从而实现APF的有功功率损耗与补偿性能的综合优化。仿真结果验证了该方法的正确性与有效性。