Title: Two-level 24-pulse double-way voltage source converter-based STATCOM

Authors: Bhim Singh; Venkata Srinivas Kadagala

Addresses: Department of Electrical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi – 110016, India ' Department of Electrical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi – 110016, India

Abstract: This paper presents a two-level 24-pulse double-way voltage source converters (VSCs) configuration for the static synchronous compensator (STATCOM). It uses four identical six-pulse double-way VSC sets to form a 24-pulse VSC configuration of STATCOM. Each six-pulse double-way VSC set consists of two sets of two-level three-phase six-pulse gate turn off thyristor (GTO) VSCs. The phase angle difference between the fundamental ac voltages of two three-phase six-pulse GTO VSCs is varied for the reactive power control. The STATCOM is operated at a constant dc link voltage which results in better utilisation of the converter compared to the operation of the STATCOM with variable dc link voltage. The STATCOM is designed for ±100 MVAR and connected to a 33 kV/60 Hz ac system to evaluate its performance by varying the reference reactive power. The model of proposed STATCOM is developed using MATLAB along with Simulink, sim-power system (SPS) toolboxes and simulation results demonstrate its satisfactory steady state and dynamic performances.

Keywords: static synchronous compensator; STATCOM; harmonic reduction; 24-pulse VSC; voltage source converters; fundamental frequency switching; simulation.

DOI: 10.1504/IJPELEC.2012.051370

International Journal of Power Electronics, 2012 Vol.4 No.5, pp.433 - 446

Accepted: 25 Aug 2012
Published online: 08 Jan 2013 *

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