전력전자학회:학술대회논문집 (Proceedings of the KIPE Conference)
- 전력전자학회 2011년도 전력전자학술대회
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- Pages.524-526
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- 2011
Study on PWM Converter Control under Unbalanced Network Condition
- Sastrowijoyo, Fajar (School of Electrical Engineering, Chungbuk National University) ;
- Choi, Jaeho (School of Electrical Engineering, Chungbuk National University)
- 발행 : 2011.07.05
초록
This paper focuses on study on PWM converter control under unbalanced network condition. Voltage unbalance in a three-phase system causes the performance deterioration by producing 120 Hz voltage ripples in the DC link and 120 Hz ripple in reactive power. To eliminate the ripples, both positive and negative sequence currents should be controlled simultaneously. In this paper four PI controllers on synchronous reference frame is implemented to control D and Q currents in both positive and negative sequence. Positive and negative sequence signal extraction is done using delay signal cancellation method. Simulation results show satisfactory performance in suppressing 120 Hz ripples.
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