Comparison of integer and fractional order controller of battery discharge based DC-DC converter

This paper deals with the battery energy management for the case of isolated locations when they are equipped by wind turbines using energy storage devices. To cover the shortfall or the overflow of those kind of generation caused suddenly by the wind variation, the energy storage device is a necessity to improve our isolated wind farm. From this condition a great part of the energy distribution is managed at the DC form the batteries. Those later are linked via DC-DC converters. The main idea of this paper is focused on DC-Bus voltage and currents control based on the fractional order PID. So a fractional order and integer order PID are applied. Their performance in the case of DC/DC converter for batteries discharging. PID controller is used to enhance output characteristics of the converter and a fractional order controller is proposed to achieve best performance to maintain stability of the dc link. The proposed control has been investigated through Matlab/Simulink environment.