Analysis of Harmonic Distortion in PV-Wind-Battery Based Hybrid Renewable Energy System for Microgrid Development

摘要

Our proposed methodology is considered as the intelligence-based control framework, which includes a fuzzy-logic-based controller for the control of PWM inverter. Microgrid consists of hybrid-renewable-based energy sources such as a photovoltaic generation unit and a PMSG-based wind generation unit with hill-climbing-based MPPT control algorithms. A battery backup system is also used, which supplies the stored energy during emergency to the variable load as well as the utility grid in such a manner that it maintains the desired load level. Several issues associated with the integration of hybrid-wind-solar-based renewable energy into the utility grid due to its intermittent and uncertainty nature. Various power electronic converters are associated with the grid system, which injects the harmonics and further increases the power quality problems such as harmonic distortion. Total harmonic distortion is a significant measuring parameter, which directly related to the overall power quality measurement of the grid. In this work, an FFT-based THD analysis is carried out to obtain the scale of harmonics at load side and the simulation of proposed methodology is achieved using MATLAB/Simulink environment.