Integrated Scheme for Renewable Hybrid Energy Conversion System

Abstract

In last few decades the development of electricity market has accelerated demand for power quality and better stability. Energy reserves like coal, oil are likely to get extinguished in the near future. Moreover, environment pollution has given rise to problems like green house emissions, acid rains and global warming. Due to this renewable energy systems such as wind, solar, fuel cell or geothermal power have gained popularity.

Renewable sources of energy require high capital cost and also their output is quite variable. So to overcome these problems literature suggests a hybrid AC-DC interface for photovoltaic (PV)-Wind Energy Conversion System (WECS)-Battery connected to the grid in such system. Wind turbine is coupled with Doubly Fed Induction Motor. The output of wind turbine is DC which is converted into AC with help of an inverter. An additional battery is provided so that when power is not available then the battery can supply the power. The output of PV panel is DC. The output of wind turbine is DC which is converted into AC with help of an inverter.

A model in MATLAB software is developed for sample study system to validate effectiveness of hybrid photovoltaic (PV) - Wind Energy Conversion System (WECS)- Battery smart grid interface. A PV module is developed with the help of MATLAB programming. Wind turbine is coupled to induction generator. Control scheme are developed to increase the efficiency of the system.