A cascaded shunt active power filter with high performance for aircraft electric power system

With the progress of “More Electric Aircraft”, to maintain a good quality is critical to the aircraft electric power system with increased power capacity. Introducing APF technology into the aircraft power system to improve the quality and reliability of the system becomes a preferable solution. In this paper, based on the analysis and modeling of the shunt APF with conventional close loop control, a feedforward compensation path of load current is proposed to improve the dynamic performance of APF. Corresponding control strategy of the cascaded inverter topology based aeronautical active power filter (AAPF) is proposed. Furthermore, global framework and control performance of the proposed AAPF are presented in detail. In order to verify the above analysis and compensation performance of the proposed AAPF, a prototype with the load power of 7.2kVA is built and test in the laboratory. Experimental results show that good compensation results are achieved in steady state and trasiant condition.