考虑风电消纳的电热混合储能系统优化定容方法

大规模风电并网影响了电力系统的安全稳定运行,导致电网出现弃风现象,限制了风电的发展。考虑电力系统与热力系统的协调运行,使用电热混合储能系统与电网进行电量交换可以有效提升风电消纳水平,文章提出了一种考虑风电消纳的电热混合储能系统优化定容方法。首先,基于历史风电数据对风电功率建模,获得满足并网要求的目标并网风电功率;随后,采用电储能、电锅炉和储热设备组成电热混合储能系统,建立考虑电热混合储能系统运行约束,以系统总成本最低为目标的优化定容模型,并求解出电热混合储能系统的经济优化定容结果;最后,使用某电热综合能源系统的实测数据进行仿真计算,算例结果验证了所提方法对电热混合储能系统优化定容的有效性,在提高系统风电消纳能力的情况下保证了系统整体的经济效益。

An Optimal Sizing Method for Hybrid Electrical and Thermal Energy Storage System Considering Wind Power Accommodation

Large scale wind power integration affects the safe and stable operation of the power system, resulting in the phenomenon of wind abandonment and limiting the development of wind power. Considering the coordinated operation of power system and thermal system, the level of wind power accommodation can be effectively improved by using a hybrid electrical and thermal energy storage system to exchange energy with power grid. This paper proposed an optimal sizing method for hybrid electrical and thermal energy storage system considering wind power accommodation. Firstly, wind power is modeled according to historical wind power data, and target grid-connected wind power meeting the grid-connected requirement is obtained. Then, the hybrid electrical and thermal energy storage system is composed of electric energy storage, electric boiler and heat storage. The optimal sizing model of the hybrid electrical and thermal energy storage system is established considering the operational constraints and taking the minimum total cost of the system as the objective and the economic and optimal sizing results of hybrid electrical and thermal energy storage system are solved. Finally, the proposed method is verified by measured data. The case study results illustrate the effectiveness of the proposed method to optimize the size of the hybrid electrical and thermal energy storage system. Furthermore, the proposed method can improve the wind power accommodation effectively and ensure the overall economic benefits of the system.