Abstract
The use of renewable power sources, like wind power, has been increased recently due to climatic changes caused by fossil fuels and fast depletion of fossil fuels. This has lead to the tremendous increase in the interconnection of wind turbines to power system grid. This interconnection of wind turbines on a large number in grid causes problems such as power quality, maintaining system voltage, reactive power compensation, control of grid frequency and aspects of power system grid stability. In this paper, STATCOM utilises hexagon hysteresis current control (HHCC) to improve the power quality. The proposed control scheme supplies the required reactive power to the system and thus, relieves the source, leading to unity power factor (UPF) at the source and also, it injects currents to reduce THD to satisfy IEC standard. In the proposed HHCC, the current control has been achieved by transforming the three phase (a, b, c) system into stationary (α, β) reference frame and the complex space vector concept is employed. Further, the proposed system's dynamic response has been studied and the results have been presented.
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