Analysis on interconnectivity of multi-microgrids under fault condition of distribution network

作者：Yu Lei^*; Chen Qifang; Duan Liming; Liu Nian; Zhang Jianhua

来源：Dianwang Jishu/Power System Technology, 2015, 39(3): 682-689.

DOI：10.13335/j.1000-3673.pst.2015.03.015

• Droop control
• Islanded operation modes
• Load characteristics
• Low-frequency
• Micro grid
• Multi micro-grids
• Regulation ability
• Service restoration

Distribution network under fault condition can be black-started by interconnected power supply among multi microgrids to carry out service restoration for important non-fault area. Under normal grid-connection operation mode the operation of microgrid group is synchronized with the distribution network;during fault in distribution network all microgrids operate in different islanded operation mode. In view of significant differences among micro-source inside microgrids and load characteristics, it is necessary to analyze the interconnectivity of multi microgrids before the black start of distribution network containing multi microgrids and service restoration for non-fault area to ensure the secure operation of microgrid group after the grid-connection of the distribution network. The interconnectivity of multi microgrids is analyzed from the viewpoint of frequency stability and regulation ability of reserve capacity of microgrids after the grid-connection of the distribution network, and corresponding interconnection criteria are given;a simulation model is constructed, by which the dynamic process of multi microgrids after the grid-connection of the distribution network can be validated, and simulation results are available for reference to the implementation of interconnection among multi microgrids.

• 出版日期2015
• 单位新能源电力系统国家重点实验室; 华北电力大学