Abstract
The challenges faced in an isolated wind energy conversion system (WECS) are larger transient times, high steady-state error, and larger harmonic content. To overcome these issues, an Adaptive Voltage Controller (AVC) along with the Load Current Observer (LCO) could be the better proposition. However, the A VC and LCO in conjunction with the conventional Space Vector Pulse Width Modulation (SVPWM) technique to operate the three-phase inverter of WECS would not be able to further improve these parameters. This paper proposes the use of Unified Voltage SVPWM (UVSVPWM) technique along with the A VC and LCO, which could improve the transient behavior as well as reduce the harmonic content of the load voltage and current. This paper considers an isolated WECS connected to the linear load which is operated under balanced as well as unbalanced load conditions. The proposed control technique is verified for both of the balanced and unbalanced cases using MATLAB/Simulink.
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