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Application of zero-voltage-switching to a DC voltage-controlled static VAr compensator using quad-series voltage-source inverters

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3 Author(s)
Tominaga, S. ; Dept. of Electr. Eng., Okayama Univ., Japan ; Fujita, H. ; Akagi, H.

This paper discusses the potential of applying the zero-voltage-switching technique to a DC voltage-controlled static VAr compensator. The main circuit of the static VAr compensator (SVC) consists of quad-series voltage-source six-step inverters and four three-phase transformers. The SVC is characterized by a “commutation capacitor” connected in parallel with each switching device, without any additional active or passive element. The commutation capacitor plays an essential role in achieving zero-voltage-switching. Experimental results obtained From a small-rated laboratory model of 10 kVA verify the operating principle and effectiveness of the zero-voltage-switched SVC proposed in this paper. The zero-voltage-switching enables reduction of dv/dt across each switching device, thus resulting in reduced EMI and switching losses

Published in:

Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE  (Volume:1 )

Date of Conference:

23-27 Jun 1996