POWER QUALITY INTENSIFICATION FOR A GRID CONNECTED WIND TURBINE ENERGY SYSTEM

Abstract

Wind has been a standout amongst the most other sources of sustainable power over these years. There have been huge improvements in the wind turbine industry supporting this vital source as a standard sustainable asset. a comprehensive control of a wind turbine system connected to an industrial plant is discussed in this research work, where an algorithm has been developed allowing a con-trol structure that utilizes a four-leg inverter connected to the grid side to inject the availa-ble energy, as well as to work as an active power filter mitigating load current disturb-ances and enhancing power quality. A four- wire system is considered with three-phase and single-phase linear and nonlinear loads. During the connection of the wind turbine, the utility-side controller is designed to compen-sate the disturbances caused in presence of reactive, nonlinear or unbalanced single and intra-phase loads, in addition to providing ac-tive and reactive power as required. When there is no wind power available, the controller is intended to improve the power quality using the dc-link capacitor with the power converter attached to the grid. The main difference of the proposed methodology with respect to others in the literature is that the proposed control structure is based on the conservative power theory decompositions. This choice provides decoupled power and current references for the inverter control, offering very flexible, selective, and powerful func-tionalities. Real-time softwa