Title: Hexagon hysteresis current control-based STATCOM for grid connected wind turbine system

Authors: G. Muni Reddy; T. Gowri Manohar

Addresses: Department of Electrical and Electronics Engineering, Sri Venkateswara University College of Engineering, SV University, Tirupati, Andhra Pradesh, India ' Department of Electrical and Electronics Engineering, Sri Venkateswara University College of Engineering, SV University, Tirupati, Andhra Pradesh, India

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.

Keywords: static synchronous compensator; STATCOM; hexagon hysteresis current control; HHCC; battery energy storage system; BESS; total harmonic distortion; THD; wind turbine system; WTS; bang-bang current controller; BBCC; wind turbine; WT; power quality; PQ; induction generator; IG.

DOI: 10.1504/IJPELEC.2020.105149

International Journal of Power Electronics, 2020 Vol.11 No.2, pp.211 - 235

Received: 11 May 2017
Accepted: 28 Oct 2017
Published online: 14 Feb 2020 *

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