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Study on the Online Mode of Micro-Grid

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Smooth switchover of micro-grid from parallel operation mode to island operation mode is a significant method to guarantee the continuous power supply to important loads.This paper puts forward an online work mode on the basis of analyzing the features of parallel operation mode and island operation mode.According to the features of online work mode,the paper gives a fixed and unfixed DC bus voltage control strategy and builds the simulation model of unfixed DC bus voltage control strategy based on Matlab/Simulink.The simulation results show that online work mode based on the unfixed DC bus voltage control strategy can avoid the unstable problem caused by handoff process between parallel mode and island mode,ensure uninterrupted power supply for important loads,and achieve maximum power tracking of photovoltaic power generation,in addition to reducing the complexity and cost of the system.

micro-gridparallel/island modeseamless handoveronline work modeMPPT

Shen Jinrong、Chen Xingying、Yu Kun、Ni Ying、Huang Tengxiao

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Hohai University

Nanjing Engineering Research Center of Smart Distribution Grid and Utilization

Project Supported by the National High Technology Research and Development of China 863 ProgramNational Natural Science Foundation of ChinaScience and Technology Project in Changzhou

2012AA05021451207047CM20123009

2014

电气(英文版)
中国电机工程学会

电气(英文版)

ISSN：1003-4994
年,卷(期)：2014.25(4)
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