1. A novel multi-port DC-DC converter for hybrid renewable energy distributed generation systems connected to power grid
- Author
-
Qiang Mei, Wei-yang Wu, and Xu Zhen-lin
- Subjects
Stand-alone power system ,Engineering ,Isolation transformer ,Wind power ,Switched-mode power supply ,business.industry ,Distributed generation ,Boost converter ,Electrical engineering ,Electronic engineering ,business ,Power control ,Renewable energy - Abstract
Multi-port power converters are promising in applications such as renewable power generation systems and distributed generation systems (DGS). In this paper a novel multi-port DC-DC converter with a high-frequency isolation transformer is presented for a grid-connected hybrid renewable energy DG system without battery storage. Full-bridge power converters are employed to realize bi-directional power flow between renewable generators, load and grid. Detailed analysis is provided for a four-directional power converter in a wind-photovoltaic distributed generation system. In addition, a two loop PI control scheme is proposed to achieve constant output voltage and exact power flow management. Theoretical analyses are verified by simulations in PSPICE and MATLAB.
- Published
- 2008