Design and Analysis of Distributed Generation System for Quasi Z-source Inverter fed BLDC Drive

Abstract

he major players in renewable energy generation are photovoltaic (PV), wind farms, fuel cell, and biomass. These distributed power generation sources are widely accepted for microgrid applications. However, the reliability of the microgrid relies upon the interfacing power converter.The quasi z-source concept can be applied to all dc-ac, ac-dc and dc-dc power conversion whether two-level. The input voltage and output voltage share the common ground, the size of the inverter is reduced, and it operates in a continuous current mode.BLDC motor is connected at the output side which acts as a load and efficiently utilizes the power obtained from solar using PI. The qZSI acts as the interface in between the PV dc source and the BLDC motor. PI promises the maximum power delivery to the load based on maximum power point tracking (MPPT). The proposed PI-based MPPT offers high efficiency and accuracy. The closed loop control regulates the speed of the BLDC motor for different load conditions and also maintains regulated voltage and current.