A Robust Scheduling Method for AC/DC Microgrid Considering Power Tracking of Uncontrollable Generators

Abstract

The invention discloses an AC / DC microgrid robust scheduling method considering power tracking of an uncontrollable generator, comprising the following steps: step 10) obtaining uncertainty prediction parameters and establishing an uncertainty set; step 20) based on step 10 ) to establish the source-load uncertainty set, linearize the output constraint of the uncontrollable generator set; step 30) obtain the operating cost coefficient and operating limit of each device in the microgrid, and establish the AC / DC microgrid based on step 10) and step 20). Robust optimization model of the grid; step 40) Solve the robust optimization problem: use the nested column constraint generation algorithm to iteratively solve the robust problem, and obtain the robust operation plan of the AC and DC microgrid. This method takes into account the non-adjustable power characteristics of renewable energy generating units in the microgrid, and realizes the robust optimal scheduling of AC and DC microgrids through the coordinated scheduling of unit start-stop and output, and meets the power tracking requirements of uncontrollable generating units. The operation plan of the AC / DC microgrid provides important reference guidance.

Description

technical field [0001] The invention belongs to the technical field of energy management and economic dispatching of microgrids, and in particular relates to a robust dispatching method for AC / DC microgrids considering power tracking of uncontrollable generators. Background technique [0002] Traditional power generation methods based on fossil fuels have brought huge pollution to the natural environment. Therefore, more and more renewable clean energy is connected to the power system through microgrids, and the penetration rate of renewable energy in the power grid is gradually increasing. Due to the low cost of renewable energy power generation, microgrid managers hope to use more renewable generators to supply power to loads to reduce system operating costs; however, renewable energy is highly uncertain and volatile, and its power generation Units are often regarded as uncontrollable units in actual dispatching, so the generated power usually tracks the maximum power afte...

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Problems solved by technology

However, for the microgrid robust optimal scheduling considering uncertainty, it often occurs that the output of renewable power generation is at the upper limit of the deviation interval, and the uncontrollable power of the generator set will cause the power of renewable power generation to be too large to be absorbed. At this time, in order to ensure the system The safe operation of the unit can only be cut out of operation

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