PERFORMANCE COMPARISON OF STAND ALONE PERMANENT MAGNET SYNCHRONOUS GENERATOR AND SQUIRREL CAGE INDUCTION GENERATOR BASED WIND ENERGY CONVERSION SYSTEMS
Abstract
Off-Grid small wind turbines provide a very attractive renewable energy source for remote communities and small businesses. Due to its high reliability and efficiency, gearless-drive permanent magnet synchronous generator might currently be the most common wind turbine in such application. However, wind turbines using geared- squirrel cage induction generator are still widely accepted due to robustness, simplicity, light weight and low cost. This work develops variable-speed Wind Energy Conversion Systems (WECS) using squirrel cage induction generator and permanent magnet synchronous generator. Both generators are connected to the load through a rectifier and an inverter. The performances of both generators are examined under comparable power ratings and similar control techniques. In this paper, a comparison between the two generators is presented for generator's voltage and current harmonic distortion. Simulations have been performed using Matlab/Simulink under varying wind speed conditions.