Wind power integration unit combination method and device considering compressed air energy storage

Abstract

The invention discloses a wind power integration unit combination method and device considering compressed air energy storage. The method comprises the steps that according to historical data, wind power output is predicted, a wind power output uncertainty set is constructed; the output constraint and energy storage energy constraint of each time period of a compressed air energy storage system are set; an optimized objective function by adopting the minimized cost as the target of an electric system is set; the power balance constraint, the backup constraint, the climbing constraint and the line power flow constraint needing to be met in each time period of the electric system are set; the output constraint and the minimum starting and stopping constraint of a thermal power unit are set;a robust unit combination model considering compressed air energy storage is constructed, and the robust unit combination model is obtained to obtain a robust unit combination strategy considering compressed air energy storage. According to the method, the compressed air energy storage unit combination strategy considering the wind power uncertainty can be obtained, so that the load modulation behaviors of the compressed air energy storage system are brought into full play, and the new energy absorptive proportion is effectively increased.

Description

technical field [0001] The invention relates to the technical field of new energy grid-connected dispatching, in particular to a method and device for combining wind power grid-connected units considering compressed air energy storage. Background technique [0002] With the development of economy, today's society is facing the dual pressure of energy shortage and environmental pollution. Therefore, large-scale development of renewable energy has become the focus of international energy strategy. Wind power is a typical example of large-scale new energy utilization, and its access has brought a huge impact on the traditional power system. According to statistics, as of the end of 2013, the global cumulative installed wind power capacity was 486.7GW, a year-on-year increase of 12.62%, of which newly installed capacity exceeded 54.6GW, and the total installed capacity in Asia was 203.64GW, accounting for 41.84% of the global total installed capacity of wind power. The large-s...

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Problems solved by technology

The current mainstream energy storage technologies have their own advantages and disadvantages. Among them, pumped hydro storage has high power, large capacity and low cost, but it has special requirements for the site; battery energy storage has high energy density and high efficiency, but has a limited lifespan and is time-consuming It has an impact on the environment; compressed air energy storage has the advantages of high power and large capacity, and its application is not limited by the site, which has advantages. However, this method does not consider the impact of the access of wind power and other uncertain sources on the grid dispatching method

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