Title: STATCOM analysis of twin converter using PWM technique
Authors: J.S. Sathiyanarayanan; A. Senthil Kumar; J. Jayashree
Department of EEE, Arunai College of Engineering, Velu Nagar Tiruvannamalai, Tamilnadu, India
Department of EEE, Velammal Engineering College, Chennai, Tamilnadu, India
Department of ECE, Arunai College of Engineering, Velu Nagar Tiruvannamalai, Tamilnadu, India
Abstract: This paper addresses a two different configuration of shunt connected static synchronous compensator (STATCOM) namely a six pulse voltage source converter-based static synchronous compensator (STATCOM) and a 12 pulse voltage source converter-based static synchronous compensator with two different dc link voltages to demonstrate its effectiveness in maintaining stability of the voltage in a 600 km transmission line. The main objective of this paper is to maintain simple and fast voltage regulation at any point in the transmission line with reduce total harmonic distortion (THD) by connecting the twin converter-based static synchronous compensator to the grid through accomplishing indirect current control (ICC) technique which in turn utilities four PI control loops. The indirect current controller is developed to produce the modulation signals in order to generate the gate signals for the two voltage source converters (VSCs) by using the phase shifted carrier-based pulse width modulation (PWM) topology. Here simulation studies is performed with the above mentioned static synchronous compensator configurations and finally concludes that twin converter-based static synchronous compensator operates satisfactorily under power quality problems such as voltage interruption, sag, etc. compared to conventional static synchronous compensator.
Keywords: voltage source converter; VSC; total harmonic distortion; THD; static synchronous compensator; STATCOM; pulse width modulation; carrier-based PWM; CB-PWM; flexible AC transmission system; FACTS; twin converter; voltage regulation; indirect current control; ICC; PI control; simulation.
Int. J. of Energy Technology and Policy, 2015 Vol.11, No.4, pp.331 - 347
Submission date: 25 Mar 2015
Date of acceptance: 23 May 2015
Available online: 12 Jan 2016