MPPT-Based Integrated Generator-Rectifier System for Wind Energy System

Abstract

Offshore wind is rapidly becoming a key renewable energy source. It involves wind that flows from land towards the sea, and effectively harnessing this energy requires the use of large, multi-megawatt wind turbines along with highly efficient, high power density, and reliable power conversion systems to maintain a competitive Levelized Cost of Electricity (LCOE). An integrated system that incorporates both active and passive rectifiers with a multiport permanent magnet synchronous generator offers a promising
solution for electro-mechanical power conversion. For offshore wind energy applications, these integrated systems must incorporate maximum power point tracking (MPPT), which is challenging due to the presence of multiple uncontrolled passive rectifiers. Additionally, AC-to-DC power conversion is critical in Wind Energy Conversion Systems to reduce system losses. This conversion process is essential for emerging high-power applications like electrified transportation and wind power generation. The project demonstrates the feasibility of MPPT by showing that controlling the active-rectifier d-axis current can regulate the total system output power. This MPPT capability presents new opportunities for integrated systems in offshore wind applications.