Microgrid power scheduling method and system with seawater desalination load

Abstract

The invention relates to a microgrid power scheduling method and system with a seawater desalination load. The method comprises the steps of: obtaining an optimal power scheduling scheme of a power device in a microgrid according to a pre-configured microgrid optimization scheduling model; and adjusting the power of the power device in the microgrid based on the power scheduling scheme of the microgrid. The technical solution provided by the invention optimizes and schedules the power device of the microgrid over a two-stage time scale, considers the economic cost of the microgrid operation and the influence of a fresh water demand on the seawater desalination load characteristics of the microgrid at a time scale, improves the applicability of the power scheduling scheme of the power device in the microgrid, achieves the real-time power balance of the microgrid at the time scale, and improves the steady state performance of the microgrid.

Description

technical field [0001] The invention relates to the field of microgrid optimization operation, in particular to a microgrid power scheduling method and system including seawater desalination load. Background technique [0002] In recent years, the marine economy has been valued by countries all over the world and has developed rapidly; with the introduction and continuous improvement of the strategic decision to implement marine development, the domestic marine economy has entered a stage of rapid development, and the development of coastal areas and islands has also continued. to increase. Sufficient and reliable power supply plays an important role and significance for the protection of daily life in coastal areas and islands and the development of industrial economy. [0003] In some coastal areas and islands far from the mainland, the laying cost of power supply lines is high and the construction is difficult. It is difficult to supply power to them through the main net...

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Problems solved by technology

For example, in "Optimal Scheduling of Energy Resources and Management of Loads in Isolated / Islanded Microgrids" written by "CANADIAN JOURNALOF ELECTRICAL AND COMPUTER ENGINEERING", Volume 40, Issue 4, 2017, Talal Alharbi et al. A system optimization scheduling management method is proposed for island microgrids with various distributed power sources, but the seawater desalination load is not considered in this method, making the method unsuitable for microgrids with seawater desalination loads

[0007] Invention patent 201310642457.8 discloses an optimal scheduling method for island micro-grids containing new energy and seawater desalination loads, effectively solving the optimal scheduling problem for micro-grids containing wind turbines, photovoltaic cells, diesel generators, batteries, and seawater desalination loads , but the optimization objective of this method only considers the minimization of diesel generator fuel consumption and battery life loss in the microgrid, and it is difficult to achieve optimal economic operation of the entire microgrid

[0009] At present, there are few related researches on energy optimization dispatching methods for microgrids with renewable energy power generation and seawater desalination loads. The existing methods mainly have the following two shortcomings: First, most of the existing methods are single-time-scale Micro-grid energy scheduling management. In actual situations, the randomness and volatility of wind power, photovoltaic and other distributed power sources and short-term fluctuations in load will have adverse effects on these methods, causing the actual operating state to deviate from the planned operating point, and even affect to the safe and stable operation of the microgrid; second, the existing methods are not deep enough for the analysis of the characteristics of seawater desalination load and the correlation between the demand for fresh water, which will lead to the dispatching plan obtained by these methods and the The actual situation does not match, which in turn affects the applicability of the scheduling method and its scheme

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