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An Input Current Waveshaping AC-DC Converter for Rectifier Loads  

Singh, Bhim (Department of Electrical Engineering, I.I.T.)
Garg, Vipin (Department of Electrical Engineering, I.I.T.)
Bhuvaneswari, G. (Department of Electrical Engineering, I.I.T.)
Publication Information
Journal of Power Electronics / v.8, no.1, 2008 , pp. 1-9 More about this Journal
Abstract
This paper presents the design and analysis of a new input AC current wave shaping AC-DC converter for cost effective harmonic mitigation under varying loads. The proposed converter consists of a delta-polygon connected autotransformer based twelve-pulse AC-DC converter and a small rating passive shunt filter tuned at $11^{th}$ harmonic frequency. The proposed AC-DC converter eliminates the most dominant $5^{th},\;7^{th}$ and $11^{th}$ harmonics and reduces higher order harmonics; thereby, resulting in an improved power quality at AC mains. Moreover, the design of the autotransformer is modified to make it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. To validate the proposed approach, various power quality indices are presented under varying loads. Experimental results obtained on the developed converter are given to validate the model and design of the proposed converter.
Keywords
multipulse AC-DC converter; power quality improvement; delta-polygon autotransformer; passive filter;
Citations & Related Records

Times Cited By Web Of Science : 6  (Related Records In Web of Science)
Times Cited By SCOPUS : 4
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