辅助火电机组AGC调频的混合储能容量配置优化

Optimizing Capacity Configuration of Hybrid Energy Storage for Assistant AGC Frequency Regulation of Thermal Power Units

面对大规模能源转型带来的电力系统频率安全挑战,火电机组独自承担二次调频能力不足,储能技术的发展为解决频率安全问题提供了解决方案。提出由飞轮储能阵列和锂离子电池组成的混合储能系统来辅助火电机组的二次调频,以火电机组负荷和AGC指令偏差作为混合储能系统的充放电功率指令,基于改进完全集合经验模态分解方法(ICEEMDAN)将功率偏差分解后得到高低频分量,建立混合储能辅助火电机组AGC调频的经济性评估模型,以年均收益最大为目标进行求解,得到混合储能系统的最佳容量配置,验证了所提混合储能系统容量配置优化方法的有效性。

Facing the frequency security challenges of power system posed by large-scale energy transition,thermal power units alone are not capable of undertaking secondary frequency regulation,and the development of energy storage technology provides solutions to solve the frequency security problems.In this paper,we propose a hybrid energy storage system integrating flywheel energy storage arrays with lithium-ion batteries to assist the secondary frequency regulation of thermal power units,and use the deviation of thermal power unit load and AGC command as the charging and discharging power command of the hybrid energy storage system.The optimal capacity configuration of the hybrid energy storage system is obtained by solving an economic evaluation model with the objective of maximizing the average annual revenue,which verifies the effectiveness of the capacity configuration optimization method proposed in this paper.