Power quality intensification for a grid connected wind turbine energy system [articol]

Abstract

Wind has been a standout amongst the most other sources of sustainable power over these years. There have been huge im-provements in the wind turbine industry sup-porting this vital source as a standard sustain-able 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 control-ler is intended to improve the power quality using the dc-link capacitor with the power converter attached to the grid. The main dif-ference of the proposed methodology with re-spect to others in the literature is that the pro-posed control structure is based on the con-servative 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 software benchmarking has been conducted in MATLAB to evaluate the performance of the proposed control algo-rithm for full real-time implementation.