Speed sensorless based adaptive maximum power point tracking control of IPM synchronous wind generator

In the variable speed wind turbine, generator speed can be operated at maximum power operating points by adjusting the shaft speed optimally. This paper presents a speed sensorless based adaptive maximum power point tracking (MPPT) control of interior permanent magnet synchronous wind generator (IPMSWG). For the proposed control system a model reference adaptive system is incorporated to estimate the rotor position. Furthermore, without requiring the knowledge of wind speed, air density or turbine parameters, the MPPT algorithm generates optimum speed command for speed control loop of vector controlled machine side converter. The MPPT algorithm uses the estimated active power output of the generator as its input and generates command speed so that the maximum power is transferred to the dc-link. The performance of the proposed speed sensorless adaptive MPPT control of IPMSWG is tested in both simulation and experiment at variable wind speed conditions.