Study of Snubber Circuits in the Voltage Source Converter Based on Series-Connected IGBTs

Abstract:

The DC voltage of the VSC is very high and it is necessary to connect several IGBT in series. Some snubber circuits have to be used to restrain the over-voltage of IGBTs so as to avoid its damage and the snubber circuit will increase the current stress too. The over-voltage of IGBT in the converters is studied in the paper firstly. Then, the common snubber circuits used in series-connected IGBTs are discussed and compared. A simulated model is set up in Saber to study the snubber circuit at last, the results show that the RC snubber circuit is more suitable for series-connected IGBTs.

• Periodical: Applied Mechanics and Materials (Volumes 568-570)
• Pages: 1238-1242
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.568-570.1238
• Online since: June 2014
• Authors: Jie Yang*, Jun Liu, Jia Liang Wen, Yu Feng Qiu, Hai Long Bao, Tao Yao, Zhong Yuan Chen, Zhi Xia Wang
• Keywords: Current Stress, Series-Connected IGBTs, Snubber Circuit, Surge Voltage, VSC

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DOI: 10.1109/28.67534