This paper elaborates on the analysis and simulation of a megawatt Wind Turbine (WT) driving low speed Permanent Magnet Synchronous Generator (PMSG) based on Current Source Converter (CSC) using PSIM computer simulation program. The system consists of wind turbine, PMSG, maximum power point tracking (MPPT) and three-phase CSC models. In the WT model, the best performance coefficient has been determined according to the variable wind speed with MPPT control. The gear-box has been eliminated by the low speed PMSG to achieve high efficiency. The ac power output from PMSG is fed to a three-phase CSC, which extracts maximum power through closed-loop regulation of generator speed. The current source PWM inverter is used to interface the system with the electrical utility. The available maximum power fed to the grid is adjusted by regulating dc-link output current of CSC according to the variable wind speed.
