Fuzzy decision method for island micro-grid including wind-solar-diesel-battery and seawater desalination system

Abstract

The invention discloses a fuzzy decision method for an island micro-grid including a wind-solar-diesel-battery and seawater desalination system. Aiming at the problems that the operation state of a distributed power supply in an island micro-grid system generally has fluctuation, randomness and difficult predictability, and difficult matching exists between power supply and consumption loads of the system in an off-network state due to the above reason and the like, the charging and discharging states of an energy storage unit generally equipped on an island and the workbench time and the workbench number of the seawater desalination system are adjusted and controlled by taking the generation and consumption relationship (GCR) of a real-time acquisition system, remaining amount of freshwater (RAF) of a seawater desalination system (SDS) and the state of charge (SOC) of a storage unit (SU) as control inputs of the decision system; therefore, the micro-grid system can absorb excess generating capacity of the distributed power supply (DG) and fill missing loads; and simultaneously, the lowest electricity and water demands of users on the island can be ensured when diesel consumption is reduced to the most extent by deciding the switching time and duration of a diesel generator system (DGS).

Description

technical field [0001] The invention relates to the fields of distributed power generation and microgrids, in particular to a fuzzy decision-making method for island microgrids with wind, diesel storage and seawater desalination systems. Background technique [0002] With the continuous improvement of human ocean concepts, the marine economy has entered a stage of rapid development, and the widely distributed offshore islands are an important support for global ocean development, and their construction and development have also received more and more attention. However, due to their relatively closed geographical environment, the development degree and industrial competitiveness of offshore islands are directly affected and restricted by resources and energy factors. Whether they can obtain the energy necessary for their own production and life without relying too much on the protection of the mainland Supply has become one of the main factors to be considered in the current...

AI Technical Summary

Problems solved by technology

However, the traditional method of solely relying on energy storage units to adjust system power generation fluctuations will greatly increase the use of energy storage equipment itself, increase its maintenance costs and reduce its service life, which will eventually lead to potentially huge economic losses ; In addition, the excessive and fast loss of energy storage equipment will also greatly weaken the safety, reliability, stability and economy of the entire microgrid system

Therefore, from a long-term analysis point of view, the method of simply relying on island energy storage equipment for island power deployment is not an efficient and reliable means of regulation

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