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A New Control Scheme for Maintaining Balanced DC Voltages in Static Var Compensator(SVC) Using Cascade Multilevel Inverter  

Min, Wan-Ki (조선이공대학 전기과)
Min, Joon-Ki (충북대학교 전기전자공학부)
Choi, Jae-Ho (충북대학교 전기전자공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.54, no.4, 2005 , pp. 179-184 More about this Journal
Abstract
This paper examines the application of high voltage static var compensator(SVC) with cascade multilevel inverter which employs H-bridge inverter(HBI). A new switching scheme is developed for the SVC system. To improve the unbalanced problem of the DC capacitor voltages, the rotated switching scheme of fundamental frequency is newly used. The optimized fundamental switching pattern with low switching frequency is adapted to be suitable for high application. The selective harmonic elimination method(SHEM) allows to keep the total harmonic distortion(THD) low in the output voltage of multilevel inverter. The SVC system is modeled using the d-q transform which calculates the instantaneous reactive power. This model is used to design a controller and analyze the SVC system. Simulated and experimental results are also presented and discussed to validate the proposed schemes.
Keywords
SVC; Cascade Multilevel Inverter; HBI; Balanced DC Voltage; SHEM;
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1 C. Schauder, et al., 'Development of a ${\pm}100$ MVAR Static Condenser for Voltage Control of Transmission Systems,' IEEE PES Summer Power Meeting, Paper No.94SM479-6PWRD, 1994
2 D. A. Woodford, et al., 'Controlling a Back-to-Back DC Link to Operate as a Phase Shift Transformer.' paper no. 14-202, GIGRE 1994
3 Wan Ki Min, et. al., 'Control of STATCOM Using Multilevel Source inverter for High Power Application', Prcc. IEEE PEDS, Vol. 2, pp. 871-876, July 1999
4 L. H. Walker, et. al., 'Force-commutated reactive power compensa-tor,' IEEE Trans. Ind. Appl., vol. IA-22, no. 6, pp. 922-930 Nov./Dec. 1986   DOI
5 F. Z. Peng, et al., 'Multilevel voltage source converter system with balanced DC voltage', IEEE IAS'94 Annual Meeting, pp. 1144-1150, 1995
6 H. Akagi, et. al., 'Analysis and design of a DC voltage-controlled static var compensator using quad -series voltage source inverters', IEEE Trans. Ind. Appl., vol. 32, no. 4, pp. 970-977, 1996   DOI   ScienceOn
7 C. Hochgraf, et. al., 'Comparison of multilevel inverters for static var compensation,' in Conf. Rec. IEEE/]AS Annual Meeting., 1994, pp. 921-928
8 Gyu H. Cho, et al., 'Modeling and analysis of a static var Compensator using multilevel voltage source inverter', IEEE/IAS'94 Annual Meeting, pp 946-953, 1994
9 S. Monri, et. al., 'Development of Large Static Var Generator Using Self-Commutated Inverters for Improving Power System Stability' IEEE PES Winter Power Meeting, Paper no. 92 WM165-1, 1986