Robust scheduling method for AC/DC microgrid of considering power tracking of uncontrollable generator

Abstract

The invention discloses a robust scheduling method for an AC/DC microgrid of considering power tracking of an uncontrollable generator. The method comprises the following steps of (10) obtaining uncertainty prediction parameters and building an uncertainty set; (20) linearizing output constraints of an uncontrollable generator set on the basis of the source charge uncertainty set built in the step(10); (30) obtaining operation cost coefficients and operation limits of various devices in the microgrid and building a robust optimization model of the AC/DC microgrid on the basis of the step (10)and the step (20); and (40) solving a robust optimization problem: iteratively solving the robust problem by using a nested column constraint generation algorithm and obtaining a robust operation plan of the AC/DC microgrid. According to the method, the characteristic that the power of a renewable energy generator set in the microgrid is considered, robust optimization scheduling of the AC/DC microgrid is achieved through start-stop of the set and synchronized scheduling of output, the power tracking requirements of the uncontrollable generator set are met and an important reference guide isprovided for making an operation plan of the AC/DC microgrid.

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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