梁继业, 袁至, 王维庆, 李骥, 范玮. 基于储能系统多重约束的一次调频策略[J]. 高电压技术, 2024, 50(6): 2478-2489. DOI: 10.13336/j.1003-6520.hve.20232055
引用本文: 梁继业, 袁至, 王维庆, 李骥, 范玮. 基于储能系统多重约束的一次调频策略[J]. 高电压技术, 2024, 50(6): 2478-2489. DOI: 10.13336/j.1003-6520.hve.20232055
LIANG Jiye, YUAN Zhi, WANG Weiqing, LI Ji, FAN Wei. Primary Frequency Control Strategy Based on Multiple Constraint of Energy Storage System[J]. High Voltage Engineering, 2024, 50(6): 2478-2489. DOI: 10.13336/j.1003-6520.hve.20232055
Citation: LIANG Jiye, YUAN Zhi, WANG Weiqing, LI Ji, FAN Wei. Primary Frequency Control Strategy Based on Multiple Constraint of Energy Storage System[J]. High Voltage Engineering, 2024, 50(6): 2478-2489. DOI: 10.13336/j.1003-6520.hve.20232055

基于储能系统多重约束的一次调频策略

Primary Frequency Control Strategy Based on Multiple Constraint of Energy Storage System

  • 摘要: 基于荷电状态(state of charge,SOC)控制储能系统参与一次调频时,由于储能系统出力约束条件较为单一,因而限制了储能系统的性能。针对此问题提出一种基于储能系统多重约束的一次调频策略。首先,把通过双层模糊控制方法确定储能系统多时间尺度调频死区作为第1重约束条件,避免火电机组与储能电池频繁动作。其次,将SOC作为第2重约束条件,约束因子作为第3重约束条件,基于logistic曲线构建惯性与下垂综合控制模型,约束储能系统出力。最后,通过高精度SOC构建快速均衡函数,缩短SOC均衡时间。通过搭建仿真模型分别在阶跃负荷扰动和连续负荷扰动的工况下验证所提控制策略有效性。

     

    Abstract: When an energy storage system is controlled based on state of charge (SOC) to participate in primary frequency control, the performance of the energy storage system is limited due to the relatively single output constraint condition of the energy storage system. To solve this problem, a primary frequency control strategy based on multiple constraints of energy storage system is proposed. Firstly, the double-layer fuzzy control method is used, so that the multi-time scale frequency modulation dead zone of the energy storage system is determined as the first constraint to avoid the frequent operation of thermal power units and energy storage batteries. Secondly, SOC is taken as the second constraint condition, and the constraint factor is taken as the third constraint condition. A comprehensive control model of inertia and sag is built based on the logistic curve to constrain the output of the energy storage system. Finally, the high precision SOC is used to construct a fast balancing function to shorten the SOC balancing time. Simulation models are built to verify the effectiveness of the proposed control strategy under the conditions of step load disturbance and continuous load disturbance, respectively.

     

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