Modeling of wind turbine driving permanent magnet generator with maximum power point tracking system

This paper elaborates on the analysis and simulation of 15 kW Wind Turbine Generator (WTG) driving low speed Permanent Magnet Synchronous Generator (PMSG) using PSIM computer simulation program. The system consists of wind turbine, permanent magnet generator, three-phase diode rectifier, boost converter, and voltage source inverter models. In the WTG model, the best performance coefficient has been determined according to the wind and rotational speed. The low speed PMSG has been used to eliminate gear-box to achieve high efficiency. The ac power output from PMSG is fed to a three-phase diode bridge forward by boost converter to effectively control the dc voltage level. The voltage source PWM inverter is used to interface the system with the electrical utility. The modulation index of the PWM inverter has been controlled to enhance the stability of the dc bus voltage. Simulation results show the superior stable control system and high efficiency. Keywords: Modeling of wind turbine, Permanent magnet generator, Maximum power point