Low THD voltage source involving two sliding mode controllers

Abstract

This paper deals with a converter using two legs of inverters which operate in parallel and act as current and voltage sources. This is done in order to increase the output power and to get a low output voltage harmonic distortion. One of the legs implements IGBTs and acts as the slave current source, when the other leg implements MOSFETs and acts as the master voltage one. The slave output current and master output voltage modules are under control of two sliding mode controllers. Then, the current source feeds the low frequency current to the load when the voltage source is in charge of compensating the high frequency current ripple of the slave source and also controls the output voltage of the converter. Thus the current source feeds the power to the load and the output voltage THD is low.