A method for energy storage configuration of wind farm system based on stochastic robust optimization

Abstract

The invention discloses a stochastic robust optimization-based energy storage allocation method of a wind field system. A scenario method, stochastic programming, interval programming and an artificial intelligence method are widely used for energy storage planning of a renewable energy-containing system at present. These methods are based on accurate renewable energy output or accurate probability distribution and have certain limitations. The method comprises the steps of describing a wind power prediction error as a random variable meeting given second-order moment and fluctuation quantity; describing an energy storage allocation problem containing the wind field system by a probability distribution function set meeting the second-order moment characteristics of the random variable by adopting a probability distribution robust joint opportunity constraint optimization model; converting the probability distribution robust joint opportunity constraint optimization model into definitive linear matrix inequalities; and finally solving the definitive linear matrix inequalities by adopting a convex optimization algorithm. According to the stochastic robust optimization-based energy storage allocation method, an economical and optimal energy storage allocation scheme meeting the safe operation requirements of a power system under the worst distribution of wind power can be obtained.

Description

technical field [0001] The present invention relates to a wind farm system energy storage configuration method, in particular to a wind farm system energy storage configuration method based on stochastic robust optimization. Background technique [0002] Wind power generation is currently the most mature renewable energy power generation technology with the best economic benefits. It is environmentally friendly. The large-scale application of wind power meets the requirements of my country's low-carbon power generation. However, with the increasing penetration of wind power, the inherent randomness, volatility and intermittency of wind power make the large-scale grid connection of wind power pose a serious threat to the safe and stable operation of the power system. [0003] Energy storage devices have been used in recent years to solve the problem of large-scale wind power grid integration due to their flexible operation mode, rechargeable and dischargeable, and environment...

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Problems solved by technology

These methods are based on precise renewable energy output or precise probability distributions, which have certain limitations

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