A Feed-Forward Control Realizing Fast Response for Three-Branch Interleaved DC-DC Converter in DC Microgrid

Haojie Wang, Minxiao Han, Wenli Yan, Guopeng Zhao and Josep M. Guerrero
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Haojie Wang: School of Electric And Electronic Engineering, North China Electric Power University, Beijing 102206, China
Minxiao Han: School of Electric And Electronic Engineering, North China Electric Power University, Beijing 102206, China
Wenli Yan: School of Mathematical And Physical Science, North China Electric Power University, Beijing 102206, China
Guopeng Zhao: School of Electric And Electronic Engineering, North China Electric Power University, Beijing 102206, China
Josep M. Guerrero: Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark

Energies, 2016, vol. 9, issue 7, 1-12

Abstract: It is a common practice for storage batteries to be connected to DC microgrid buses through DC-DC converters for voltage support on islanded operation mode. A feed-forward control based dual-loop constant voltage PI control for three-branch interleaved DC-DC converters (TIDC) is proposed for storage batteries in DC microgrids. The working principle of TIDC is analyzed, and the factors influencing the response rate based on the dual-loop constant voltage control for TIDC are discussed, and then the method of feed-forward control for TIDC is studied to improve the response rate for load changing. A prototype of the TIDC is developed and an experimental platform is built. The experiment results show that DC bus voltage sags or swells caused by load changing can be reduced and the time for voltage recovery can be decreased significantly with the proposed feed-forward control.

Keywords: DC micro-grid; storage battery; three-branch interleaved DC-DC converter; feed-forward control; response speed (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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