Performance Analysis Of Operation And Control Of PMSG Based Grid Connected Variable Speed Wind Energy Conversion System Using SVPWM

Wind is one of the most prominent renewable sources of energy. Wind energy conversion system (WECS) is based on a variable speed wind turbine with direct driven permanent magnet synchronous generator (PMSG) and transmits its electrical power to an AC grid using advanced power electronic converter system. This paper describes operation and control of variable speed WECS based on gearless PMSG to developing a maximum power point tracking (MPPT) method in order to capture maximum wind energy and implementation of grid side converter control strategy to control active and reactive powers injected into the grid. A popular technique for control of the PMSG is field oriented control in which the torque is indirectly controlled by controlling the q axis stator current. Active and reactive power is controlled by direct and quadrature current components respectively. In this system the PMSG is connected to Grid by means of a fully controlled back-to-back converter with voltage source inverter (VSI) which consists of a space vector pulse width modulation (SVPWM) and an intermediate dc link circuit. The proposed model is implemented in MATLAB/SIMULINK environment. Key words—PMSG, WECS, SVPWM, Controlled Rectifier, Voltage source inverter DC-link voltage, MPPT.