Control Aspects for PMSG-Based Grid-Connected Wind Energy Conversion System- A Review

Abstract

Wind energy provides environmentally friendly and cost-effective power generation to meet the electricity demand across the country. This paper focuses on the power converter topology, control methodology, sensorless control strategy, and various methods used for maximum power extraction in a wind power conversion system based on a direct-drive permanent magnet synchronous generator. It also briefly reviews generator grid inner connection problems such as PMSG's frequency deviation, low voltage ride through, capacitor sizing, DC-link voltage fluctuations, and output power smoothing issues. The primary focus of this paper is to understand the optimal strategy for reducing frequency deviation in Wind Energy Conversion Systems (WECS), including both islanded and grid-connected modes, and optimize the capacitor size used.