计及直流调节能力的含风电电力系统储能优化配置

随着风电装机容量的不断增加，电力系统对储能等灵活性调节资源的需求增加。而交直流混联电网是实现大规模风电并网、输送和消纳的基础。针对上述背景，提出一种计及直流调节能力的含风电电力系统储能优化配置方法，在促进新能源消纳的同时减少储能投资成本。首先，考虑到风电功率和负荷具有随机性、不确定性等特点，通过场景分析法来处理风电和负荷的随机性。其次，构建输送功率可调节的直流线路模型，并考虑储能配置和运行约束、交流电网约束等约束，建立计及直流调节能力的储能配置多场景随机优化模型。最后，以修改的IEEE14节点系统为例，进行了多个储能配置方案的对比分析，结果表明，所提方法能够提升系统对风电的消纳能力，减少对储能的需求，保证含风电电力系统运行的经济性。

Optimized Energy Storage Configuration of Wind Power Integrated Power System Considering DC Regulation Capacity

With the increasing installed capacity of wind power, stronger demand for flexible adjustment resources such as energy storage occurs in the power system, and the AC/DC hybrid power grid is the basis for the grid connection, transmission, and accommodation of large-scale wind power. Given the above background, an energy storage configuration scheme is proposed for the wind power integrated system considering the DC regulation capacity to promote the accommodation of renewable energy and reduce the investment cost of energy storage. First, a scenario analysis method is adopted to deal with the randomness of wind power and loads. Then, a DC line model with adjustable transmission power is constructed. Furthermore, combined with the constraints including energy storage configuration, energy storage operation, and AC power grid, a configuration model of energy storage based on multi-scenario stochastic optimization is built considering DC regulation capacity to minimize the total daily operating cost of the power system. Finally, a comparative analysis of multiple energy storage configuration schemes is simulated in the modified IEEE 14-bus system. The results show that the proposed scheme can promote the accommodation of wind power while lessening the demand for energy storage. As a result, the economic operation of the wind power integrated system is guaranteed.