Abstract
Distributed generation (DG) into DC micro-grid can save a lot of converter equipments compared with AC micro-grid,.So,with the popularity of DG,DC micro-grid technology also has get great development.However,the key technology of DC micro-grid is not yet mature.This paper is based on shanghai DC micro-grid demonstration project of Sate Grid Smart Grid Research Institute.Firstly,we analysis the advantages and disadvantages of AC,DC and AC/DC hybrid micro-grid.Then, after comparison and analysis of DC micro-grid topology,we put forward system scheme and corresponding control strategy.The simulation results show that, the proposed control strategy is feasible,simple,real-time and effective.This design scheme is applicable for radiant topology and would provide guidance to the development direction of DC micro-grid project later.
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