An Optimization Method for Energy Model of Island Microgrid

Abstract

The invention discloses an optimization method for an island microgrid energy model, and belongs to the field of island microgrid energy optimization. The method specifically comprises the steps: building the island microgrid energy model; taking the current time period as a first time period of an optimization period of the island microgrid energy model, dividing the optimization period into a plurality of time periods, and obtaining predicted values of wind-solar predicted output and load power corresponding to each time period; calculating the confidence coefficient of the positive standbyconstraint and the confidence coefficient of the negative standby constraint corresponding to each time period in the island microgrid energy model according to the wind-solar prediction output of each time period and the first-stage load proportion; updating an island microgrid energy model according to the confidence coefficients of the positive and negative standby constraints and the predictedvalues of the wind-solar predicted output and the load power. According to the method, the optimization period is divided into a plurality of time periods, the length of each time period is not fixed, and the wind-solar prediction output and confidence coefficients of positive and negative standby constraints are updated by taking the time periods as a reference to update the island microgrid energy model; and the operation cost of an island microgrid is reduced.

Description

technical field [0001] The invention belongs to the field of energy optimization of an isolated island microgrid, and more specifically relates to an optimization method for an energy model of an isolated island microgrid. Background technique [0002] The excessive development and utilization of fossil energy has brought serious resource depletion and environmental pollution problems, and the global energy situation is becoming more and more severe. Countries all over the world are vigorously developing renewable energy power generation, and microgrids composed of distributed power sources, energy storage units and loads have also received more and more attention. [0003] The operation mode of the microgrid is flexible. Usually, it can not only operate in the grid-connected state, exchange power with the external grid, but also operate as a completely independent island system in the off-grid state. However, for some microgrids in specific scenarios, such as remote small ...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to provide an optimization method for the energy model of the island microgrid, which aims to solve the energy supply and demand changes of the island microgrid caused by the fluctuation of distributed power generation caused by the sudden change of weather and the sudden change of load , leading to the problem of high operating costs of the island microgrid

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