1. A Modulation Technique for Neutral Point Voltage Control of the Three-Level Neutral-Point-Clamped Converter.
- Author
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Chen, Hsin-Chih, Tsai, Meng-Jiang, Wang, Yao-Bang, and Cheng, Po-Tai
- Subjects
- *
SWITCHING circuits , *CLAMPING circuits , *VOLTAGE regulators , *ELECTRIC current converters , *ELECTRONIC modulation - Abstract
The neutral-point voltage-balancing control is a critical issue of a neutral-point-clamped converter. The conventional control strategy is to inject the specific zero-sequence voltage to regulate the redundant vector, but it is unacceptable to the three-phase four-wire system. This paper provides a neutral-point voltage-balancing control by the dipolar modulation, and the control freedom of the zero-sequence voltage is flexible. Therefore, the proposed method is suitable for both three-phase three-wire and three-phase four-wire systems. Besides, the proposed method improves the control dynamic in a reactive power system. The proposed neutral-point voltage-balancing control is verified by the mathematical analysis and experimental results. The control dynamic, power loss estimation, and the output current performance are analyzed in this paper. [ABSTRACT FROM PUBLISHER]
- Published
- 2018
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