A research on cascade five-level aeronautical active power filter

With the advance of “More Electric Aircraft”, power capacity of the aircraft electrical power system and number of the nonlinear avionic devices get increased. Power quality problems including the harmonic issues effect the safe operation and flying qualities of the aircraft. Introducing active power filter (APF) techniques to solve the harmonic and reactive problems of the aircraft electrical power system is of high research values. For aircraft electrical power system, a cascade five-level topology based aeronautical active power filter (AAPF) is proposed and studied. Mathematical model, control strategy, key parameters and operation principle of the novel AAPF are presented. Experimental results obtained from a prototype show that harmonic and reactive components of the typical nonlinear load could be compensated effectively by the novel AAPF. A good compensation performance of the novel AAPF is achieved.