Review on reliability evaluation of new distribution system with micro-grid

The features of distributed generation and micro-grid are described and the new research progress of micro-grid is summarized. The integration of micro-grid changes the radial topology of distribution system and causes the bidirectional power flow. The island operation of micro-grid and the uncertainty of distributed generation output power within micro-grid bring new problems to the reliability assessment of distribution system. Limitations of current researches are summarized, such as the distribution generation modeling without the interactions between micro-grid and distribution system, the islanding strategy and the load modeling, which impede the application to micro-grid. Some research topics are proposed for the reliability assessment of micro-grid and distribution system with micro-grid: reliability assessment index system of the new distribution system with micro-grid; micro-grid operation modes and operating characteristics and their influences on distribution system; reliability modeling for distributed generation and micro-grid considering their operating characteristics; reliability assessment model of distribution system with multiple power sources and its accurate and efficient algorithm.