Power quality achievement using grid connected converter of wind turbine system

In this article a comprehensive control of a wind turbine system connected to an industrial plant is developed. The algorithm utilizes a structure of the back-to-back converter where two modes of operation can be achieved. During the connection of the wind turbine (mode I), the utility side controller is designed to compensate the harmonics caused by the nonlinear load, in addition to the active and reactive power delivery. When there is no wind power available (mode II), the controller is intended to only compensate the harmonics using the dc-link with the power converter attached to the grid. The proposed control structure operates in the defined two modes with no transition required. The harmonics reference point was extracted using two different power theories for the purpose of performance comparison. Simulation was conducted to evaluate the performance of the proposed control algorithm. The results showed power quality enhancement without the use of passive filters.