考虑频率电压空间分布特性的电网实时减载及负荷恢复策略
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国家电网有限公司科技项目(SGTYHT/17-JS-199)


Load shedding and load recovery strategy considering spatial distribution characteristics of frequency and voltage
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    摘要:

    由于网络架构、机组参数和负荷特性等多种因素的影响,故障后电网各节点的频率电压表现出一定的空间分布特性,因此在不同节点实施稳控措施和负荷恢复策略对系统稳定性影响存在差异。同时,应考虑频率、电压、有功及无功等多种强耦合性电气量的交互作用对负荷减载或恢复过程的影响,以提高负荷调节效果。在此背景下,提出一种新的基于负荷控制灵敏度指标的低频低压减载及负荷恢复策略,该方法综合考虑频率电压的空间分布特性以及各种耦合电气量的交互特性。基于实际省级电网的时域仿真表明:在负荷减载和恢复阶段,根据负荷控制灵敏度指标的负荷调节策略均有利于电网稳定性提升。

    Abstract:

    Influenced by the power grid structure, generator parameters, and load characteristics, the post-fault frequency, and voltage at nodes reflect spatial distribution characteristics, resulting in different effects of the load shedding and load recovery strategy performed at different nodes on the system stability. Besides, the influence of the interaction between coupled electrical quantities of frequency, voltage, active power, and reactive power should be considered to improve the efficiency of the load regulation. In this paper, a novel load-control-sensitivity based low-frequency and low-voltage load shedding and load recovery strategy is proposed, which considers the spatial distribution characteristics of frequency and voltage, and the interaction of coupled electrical quantities. A time-domain simulation based on a provincial power grid shows the proposed load regulation strategy improves the power grid stability during the periods of both load shedding and load recovery.

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李晨,张昊,周济,王国鹏,孙大松,汤奕.考虑频率电压空间分布特性的电网实时减载及负荷恢复策略[J].电力科学与技术学报,2021,(2):162-171. Li Chen, Zhang Hao, Zhou Ji, Wang Guopeng, Sun Dasong, Tang Yi. Load shedding and load recovery strategy considering spatial distribution characteristics of frequency and voltage[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2021,(2):162-171.

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  • 在线发布日期: 2021-05-08