Implementation of PI controlled cascaded boost power converters in parallel connection with high efficiency

Abstract

In this study, a novel method is presented for DC DC Cascaded boost converters design using PI controller block. This approach reinforces a same voltage source by using two or more cascade boost converter blocks simultaneously and is very effective in power transmission in renewable energy resources where they produce limited amount of power. In this converter, output voltage and current ripples are lower than 0.1%. One advantage of using this circuit compared to conventional boost converters is its long life because of input current division at the input blocks. A PI block controls voltage production confronting rapid load or input voltage changes by duty cycle changing and drive MOSFETs and restrict output voltage ripple. This circuit is simulated by MATLAB/SIMULINK and CADENCE for preparing to instruction and the results of the simulation confirmed the theoretical design. This design has implemented on a parallel structure with two blocks of cascaded boost converters at a laboratory scale.