Design and Implementation of Sensorless Capacitor Based Three-Level Boost Converter for Photovoltaic System

Abstract

Renewable energy sources are pollution free energy sources. They are very useful because of availability, easy to implement, less maintenance and no green house gas emission. Three level boost Converter has an advantage of lower inductor current ripple and lower switch withstanding voltage than the conventional boost Converter. Sensor less Capacitor Voltage Balancing Control method for the three level boost Converter shows that the voltage imbalance can be detected from sensing the inductor current by sampling and hold strategy i,e. it eliminates the need for extra sensors. PV system is normally used with Boost Converter. But these Converters couldn't produce higher voltage gain and these need to operate it at higher duty ratio. In this paper three level Capacitor Clamped boost Converter is proposed. Hence the output voltage is three times greater than the given input. Here higher voltage gain is possible without going for higher duty ratio. Pulse Width Modulation Control technique is implemented. Simulation results and experimental results are also provided to validate the proposed system.
DOI: 10.17762/ijritcc2321-8169.150657