Modelling and Simulation of Grid-Connected Reconfigurable Solar Converter and Wind Hybrid Power System

Abstract

This paper describes a hybrid power system that uses solar PV and wind as power sources that are interfaced to the grid to provide a continuous power supply with lower harmonic distortions. The system possesses a single-stage topology thus, reduces size, loss and cost of the converter. This kind of topology avoids unnecessary double power conversion stages to reduce power losses and improves the harmonic profile by isolating DC type of loads to DC side and the AC type of loads to AC side. The analysis is done based on PI (Proportional-Integral) controller on wind side and Electric Spring controller on solar side to control grid voltages for compensating reactive power. The hybrid system enhances the system efficiency and has greater energy balance in the supply. Initially, simulation is done for single-stage solar converter named as Reconfigurable Solar Converter (RSC) with PQ control technique for various loads. Furthermore, this model is integrated with wind power system making it a hybrid model. Then, three-phase Induction Motor is connected to the local grid as a non-linear load. The results are achieved using MATLAB/Simulink software for a grid-connected hybrid power system with non-linear load.