Compressed air energy storage-containing independent microgrid capacity optimal configuration method

Abstract

The invention discloses a compressed air energy storage-containing independent microgrid capacity optimal configuration method. The method includes the following steps that: a compressed air energy storage model is established, and a mathematical relationship between energy storage power and energy is obtained; a microgrid capacity optimization upper-level model is established according to the compressed air energy storage model and the mathematical models of other distributed power sources, and a microgrid optimal capacity configuration problem is solved; a microgrid operation optimization lower-level model is established, and relevant constraint conditions are set, and a microgrid optimal operation mode under constant capacity is determined; a genetic algorithm is adopted to solve an upper-level integer programming problem, and a mixed integer linear programming solver is adopted to solve a lower-level mixed integer linear programming problem, and iteration calculation is performed on the upper-level model and the lower-level model, and a microgrid optimal capacity configuration result which satisfies convergence conditions can be obtained. Compared with an established strategy-based configuration method, the integrated optimization model of the invention can fully count the influence of operation modes on capacity optimization so as to obtain more economical and environmentally friendly configuration schemes.

Description

technical field [0001] The invention relates to a method for optimally configuring the capacity of an independent microgrid containing compressed air energy storage. Background technique [0002] Microgrid can effectively integrate distributed power supply, load and energy storage system, and is an important part of smart grid. The independent microgrid is separated from the large power grid and uses its own distributed power supply to meet the load demand. When there is renewable energy in the microgrid, it is usually necessary to configure an energy storage system to decouple the fluctuating energy supply and rigid energy demand, improve the flexibility of the system, and ensure the reliable operation of the system. Compressed air energy storage (CAES) stores excess electrical energy by compressing air into the air storage space, and releases high-pressure air through the expander to generate power when needed. Due to its long life cycle, fast ramp speed and short start-...

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Problems solved by technology

This type of control strategy artificially specifies a series of operating criteria without considering the forward-looking nature of scheduling, that is, the impact of future scheduling on current scheduling is not considered. The operating mode determined by this will fall into suboptimal, so the capacity configuration results have certain limitations. sex

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