PV-Wind-Battery based Hybrid Standalone Microgrid with Seven Level Parallel Inverter

Abstract

Electricity generation using a combination of renewable energy sources is an effective solution for addressing various challenges. To optimize the system’s performance, it is essential to integrate a multilevel inverter between the DC-link and the load bus. Despite the complexity associated with multilevel inverters due to a high number of switches, this paper introduces a control methodology in closed-loop for a 7-level parallel inverter to enhance power quality. The study focuses on a PMSG coupled wind power conversion unit, as well as a photovoltaic (PV) and battery powered standalone power supply system. The parallel multilevel topology being proposed necessitates only half the amount of switches in comparison to traditional topologies. Additionally, a novel Sinusoidal Pulse Width Modulation (SPWM) method is employed to generate the necessary pulses for the inverter. The Hardware – in the – Loop (HIL) simulation with OPAL-RT devices is performed to assess the system’s reaction in different operational scenarios.

Keywords

• novel multilevel inverter
• wind
• pv
• standalone hybrid system