Design of an off-grid model of micro-smart grid connection of an asynchronous motor fed with LUO converter

Abstract

This paper proposes a model for a photovoltaic (PV)-based micro-smart grid system connection with asynchronous motor driving via LUO converters. LUO converter is a kind of DC–DC converter developed by Fang Lin Luo. It occupies less space than many other converters owing to a small number of electronics elements. In this model, a method was developed for forecasting the total power output under particular conditions of Ankara city (Capital of Turkey). PV cell parameters are determined firstly, and then PV array is formed including cells designed in order to calculate cumulative effect. It has tried to catch an approximation of necessary energy for systems that use the three-phase asynchronous machine using actual irradiation and temperature values. Then PV array output voltage, which is 12 V, has been converted 325 V thanks to LUO converter. Finally, space vector PWM has used for PWM production that supplies 325 V DC to 220 V AC via LUO converter for driving asynchronous motor. Instead of taking energy from the grid, energy saving is achieved by producing necessary energy from the solar panels. Thus, industrial consumption causing disruptive effects at grid can be decreased. The capability of system is demonstrated using MATLAB/Simulink simulation models.