考虑调峰调频双重约束的储能规划方法研究

  目的  在新型电力系统的构建进程中，新能源将保持高速发展态势。风、光等新能源大规模并网，其出力的随机性和波动性将给电力系统安全经济运行带来挑战。新型储能由于其具备快速的响应能力和削峰填谷的功效，再加上成本的逐步下降，未来将是电力系统不可或缺的灵活调节资源。  方法  储能容量规划是电力系统全局性问题，通过分析新能源消纳率和调频充裕度，从系统调峰和调频两个方面，以系统总成本最低为目标提出了省级电网储能规模分析方法。  结果  文章以省级电网实际参数为例，采用时序生产模拟软件分析了电源开机方式，对比了不同储能规模对全社会经济性的影响。  结论  结果表明，合适的储能规模可在提高新能源消纳的同时降低全社会成本，该方法的有效性得到了验证，可为实际应用提供指导。

Research on Energy Storage Planning Method Considering the Dual Constraints of Peak Shaving and Frequency Modulation

  Introduction  In the process of building a new power system, renewable energy will maintain a high-speed development trend. Along with large-scale grid connection of renewable energy sources such as wind energy and photovoltaic energy, the randomness and fluctuation of its output will bring challenges to the safe and economical operation of the power system. The new energy storage system will become an indispensable resource subject to flexible regulation for the power system in the future due to its fast response ability and the effect of cutting peak and filling valley as well as the gradual reduction of its cost.   Method  The energy storage capacity planning was a global problem of the power system. By analyzing the renewable energy consumption rate and frequency modulation adequacy, a provincial power grid energy storage scale analysis method was proposed from the perspectives of peak shaving and frequency modulation based on the target of the lowest total cost of the system.   Result  Taking the actual parameters of the provincial power grid as an example, the time series production simulation software has been used to analyze the power startup mode, and the impacts of different energy storage scales on the economical efficiency of the whole society have been compared.   Conclusion  It shows that the consumption of renewable energy can be improved and the cost of the whole society can be reduced by adopting the appropriate scale of energy storage. The effectiveness of the method has been verified. Therefore, this work can provide some guidance for practical application.