Abstract-The new electric power technology for modern aircraft is based on variable frequency generators typically ranges from 360 Hz at low speed to 800 Hz at high speed. Modern aircraft electric systems, including novel electrical distribution architectures, network interations, protection, wring and load manageent shoud designed to operate with variable frequency source. aModern aircraft technology is moving toward what is known as More Electric Aircraft (MEA), this aims to increase the electrical power equipment rather than mechanical or hydraulic equipment. Power Electronıcs and motors drives are the major MEA components, these could produce aharmonics on line current with poor power factor. This paper present an analytical method of calculating reactive and harmonic current and using this current as a reference to feed a series active filter to compensate the harmonic currents generated by a nonlinear load.Keywords Series active power filters (APF), harmonic and reactive current, more electric aircraft (MEA), variable frequency source.