MODELLING, ANALYSIS AND CONTROL OF NONISOLATED MULTI PORT DC-DC BOOST CONVERTER

Abstract

A non-isolated multiport DC-DC boost converter is presented in this dissertation work. This converter has various applications related to hybridizing sustainable energy sources in electric vehicles. By integrating two or more energy sources, advantages of various sources are achievable. In this converter, two input sources flexibly distribute their power to the two output load resistances. Also, using this converter, charging and discharging of battery sources is possible and controllable. The converter has two different output voltage levels which makes it easier for integrating with multilevel inverters. For designing of controllers of the presented converter system, small-signal model using each state is evaluated and bode plots for stability analysis are extracted. The validity of the non-isolated multiport DC-DC boost converter and its performance is verified by simulated and experimental results for battery discharging mode. Various control algorithms viz. PI, PID, FOPID and ANN are implemented using ATmega328p (ARDUINO UNO) microcontroller. MATLAB/Simulink platform has been utilized for simulation purpose.