Operation mode features and techno-economic analysis of micro-grid in China

Currently, China has just started micro-grid development, and has not yet formed a mature commercial operation mode, by study of foreign micro-grid operation mode and domestic micro-grid development, this article will introduce four micro-grid operation modes applicable to China, including grid operation mode, investors operation mode, joint operation mode, users operation mode, and analyze the different trade and settlement modes. Key factor affecting micro-grid investment income is the cost, covering body cost, grid-connection cost and maintenance cost. Technical and economic analysis of micro-grid consists of power system computation, micro-grid system optimization and investment revenue analysis. This paper will mainly analyze the investment revenue of micro-grid project, calculate the cost of investment, pay back period, electricity cost of three micro grids, covering a city micro grid, a remote area micro-grid and an island stand-alone micro-grid, at last, it will analyze the features, advantages and disadvantages.