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储能系统具有快速吸收或释放电能的优点,能有效弥补可再生电源波动的缺点,被广泛用作旋转备用。该文建立了考虑储能系统的发电商最优供给双层优化模型,其中上层考虑的是柴油机组的利益,下层考虑的是能源服务提供商的利益。针对下层优化模型具有不光滑的特性,采用光滑化函数进行处理。为了求解模型,通过KKT条件(KarushKuhn-Tucker)将双层优化转化成一个单层优化问题,并采用非线性互补松弛条件把非线性约束转换为线性约束。最后,通过数值实验证明了该模型和算法的有效性。
The energy storage system has the advantage of quickly absorbing or releasing electric energy and can effectively make up for the shortcoming of the fluctuation of the renewable power. It is widely used as a rotating backup. In this paper, a two-layer optimization model of generator optimal supply considering energy storage system is established, in which the upper layer considers the interests of diesel generators and the lower layer considers the interests of energy service providers. Aiming at the unsmooth characteristics of the lower optimization model, the smoothing function is used to deal with it. In order to solve the model, the bi-level optimization is transformed into a single-level optimization problem by KKT condition (Karush Kuhn-Tucker), and nonlinear constraints are transformed into linear constraints by nonlinear complementary relaxation conditions. Finally, the numerical experiments show the effectiveness of the proposed model and algorithm.