风电大规模接入会使电网的调峰压力增大，配置储能可以有效缓解系统调峰压力。为了提高系统运行的经济性，需要制定合理的风储联合调峰策略，优化风机减载功率和储能充放电功率。将风储联合调峰问题转化为最优控制问题，提出了一种基于庞特里亚金最大值原理（PMP）的最优调峰控制策略，对该问题进行求解。鉴于储能的损耗模型是复杂的非线性模型，采用间接打靶法求解最优控制的数值解。从求解哈密顿函数最小值的角度入手，提出改进调峰策略，减少了策略算法求解时间。最后，通过算例对所提的最优调峰策略进行分析，算例结果验证了所提调峰策略的有效性。

Large-scale access of wind power will increase the peak shaving pressure of the power grid, while the allocation of energy storage can effectively alleviate the pressure. In order to improve the economy of system operation, it is necessary to formulate a reasonable peak shaving strategy of the combined system, optimizing the load shedding power of wind turbine and the charge and discharge power of energy storage. The peak shaving problem of wind-storage combined system is transformed into an optimal control problem, and an optimal peak shaving control strategy based on Pontryagin maximum principle (PMP) is proposed to solve this problem. Since the loss model of energy storage is complex and nonlinear, the indirect shooting method is used to figure out the numerical solution of the optimal control. Afterwards, an improved peak shaving strategy is proposed to reduce the solution time through solving the minimum value of Hamilton function. Finally, an example is given to analyze the proposed optimal peak shaving strategy, and the example results verify the effectiveness of the proposed peak shaving strategy.

国家重点研发计划项目（2020YFB0905904）；江苏省电力有限公司科技项目（J2022160）