Energy management control method and system for island microgrid

Abstract

The invention provides an energy management and control method and system for an island microgrid, wherein continuous power sources are screened from each distributed power source of the island microgrid according to the power generation output value; If there is more than one continuous power supply, the power supply trend degree of each power supply in the same sub-network is calculated, and then the actual output of the power supply in the same sub-network is adjusted, and the distributed power supply with great potential for adjustable output and short-term overload capacity operation is intelligently screened out. Screening power sources with low potential and low operating efficiency, thereby filtering out discontinuous power sources that are not used frequently, improving the service life of energy storage equipment, reducing the volatility of the power generation output value provided by distributed power sources, and improving the power generation output value The certainty of the distributed power generation solves the problem of the stability of the power generation output of the distributed power source.

Description

technical field [0001] The invention belongs to the technical fields of micro-grid technology and power system optimization, in particular to an energy management control method and system of an island micro-grid. Background technique [0002] Island microgrids are mainly microgrids that are deployed in isolated operation on islands in marine areas far from land. Island microgrids refer to a network composed of multiple distributed power sources and their related loads according to a certain topology structure. It is a small power generation and distribution system that operates in isolation and is composed of devices, energy conversion devices, related loads, and monitoring and protection devices. Since the island microgrid is mainly a power supply network that relies on renewable energy or small and medium-sized fossil energy generators, it is difficult to guarantee the continuity, reliability and quality of the power supply of the island microgrid, and the deployment area...

AI Technical Summary

Problems solved by technology

Since the island microgrid is mainly a power supply network that relies on renewable energy or small and medium-sized fossil energy generators, it is difficult to guarantee the continuity, reliability and quality of power supply of the island microgrid, and the deployment area of ​​the island microgrid is limited. Therefore, it is necessary to strictly control noise, control pollution, and the supply cycle of power generation energy. At present, the dispatching strategies that generally exist include the shortest time strategy for diesel engines or the strategy for following energy storage loads. Renewable energy such as wind power and diesel is generally in a continuous and stable supply. The power supply is very weak, and the power supply is often periodic or uncertain, so a large number of energy storage devices are needed to assist, and the energy storage device has a service life. It is easy to reduce the service life; and, because some of the distributed power sources use renewable energy, which is very dependent on changes in natural conditions, the power generation value and output power of distributed power sources fluctuate greatly, and the power generation value is uncertain , will cause problems such as voltage deviation, voltage fluctuation, and flicker. Therefore, in the microgrid, it is necessary to control the fluctuation of the power generation output value of the distributed power supply and improve the stability of the power generation output.

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