전력전자학회:학술대회논문집 (Proceedings of the KIPE Conference)
- 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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- Pages.561-565
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- 2001
A New Scheme for Maintaining Balanced DC Voltages in Static Var Compensator(SVC) Using Cascade Multilevel Inverter
- Min, Wan-Ki (Department of Electrical Engineering Chosun College of Science & Technology) ;
- Min, Joon-Ki (School of Electrical & Electronics Eng. Chungbuk National University) ;
- Choi, Jae-Ho (School of Electrical & Electronics Eng. Chungbuk National University)
- 발행 : 2001.10.01
초록
This paper proposes a new switching scheme of a static var compensator(SVC) with cascade multilevel inverter which employs H-bridge inverter(HBI). 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.