电化学储能参与电网低频第三道防线的控制策略
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TM744

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国家自然科学基金资助项目(61933005)


A control strategy for the low frequency third defense line of power grid containing the electrochemical energy storage
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    摘要:

    针对日益凸显的电网频率安全稳定问题,利用电化学储能的快速响应特性和功率双向调节能力,将其纳入到基于就地信号响应的频率安全第三道防线中,应对大功率缺额引起的低频问题。首先,分析电化学储能在低频第三道防线中的功能定位,基于单机带负荷等值模型,提出电化学储能参与频率安全第三道防线的频率响应模型;分析电化学储能分轮次动作的必要性和前提条件,提出临界容量及其计算方法。然后,研究电化学储能低频校正控制策略的制定方法,提出表征频率恢复效果和控制代价的综合指标,计及运行方式和故障场景,建立加权优化模型并整定电化学储能各轮次控制量。最后,实际电网的算例分析表明,所提出的校正控制策略具有较好的频率控制效果和适应性,有助于拓展电化学储能在电网中的应用场景。

    Abstract:

    In response to the increasingly prominent problem of frequency security and stability of the power grid, the rapid response characteristics and the ability of two-way power adjustment of electrochemical energy storage are incorporated into the third defense line for frequency security based on on-site signal response to deal with low frequency caused by high power shortage. Firstly, the functional positioning of electrochemical energy storage in the third defense line for low frequency security is analyzed. A frequency response model of the third defense line for frequency security contained electrochemical energy storage is proposed based on the equivalent model of a single machine with load. The necessity and prerequisites of sub-round actions of electrochemical energy storage are analyzed. And a calculation method for the critical capacity of sub-round actions is proposed. Furthermore, the formulation method of the corrective control strategy is studied. The frequency recovery effect and control cost are used as comprehensive indicators. A weighted optimization model is formed to tune the control volume of each round, considering the operation mode and failure scenarios. Finally, it is verified by the actual power grid analysis that the proposed corrective control strategy has better frequency control effect and adaptability, which is helpful to expand the application scenarios of electrochemical energy storage in the power grid.

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孙诚斌,李兆伟,李碧君,邹燕,周挺,薛峰.电化学储能参与电网低频第三道防线的控制策略[J].电力工程技术,2021,40(3):27-34

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历史
  • 收稿日期:2020-12-08
  • 最后修改日期:2021-01-23
  • 录用日期:2021-02-09
  • 在线发布日期: 2021-06-11
  • 出版日期: 2021-05-28
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