Isolated soft switching DC-DC converters for HVDC and renewable energy applications

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Authors
Li, Tao
Issue Date
2016-12
Type
Electronic thesis
Thesis
Language
ENG
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Electrical engineering
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Abstract
Power electronics converters are essential in both wind/solar grid connection as well as energy storage applications. Specifically, isolated DC-DC converters can provide functions like galvanic isolation, voltage level conversion, load/line regulation, etc. Traditionally, isolation is provided by bulky line frequency transformers. The disadvantage is that magnetic components have considerable volume and weight. By incorporating isolation in medium to high frequency DC-DC converter, the size of magnetic components can be greatly reduced. However, switching loss in semiconductor devices will also increase proportionally with operation frequency. Thus, soft switching techniques that can greatly reduce the switching loss is usually applied in high frequency converters. The special challenge for renewable applications is how to maintain high efficiency over large load variation.
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December 2016
School of Engineering
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Rensselaer Polytechnic Institute, Troy, NY
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