The development of renewable energy and the increasing peak-valley difference of load demand lead to an increasing requirement of spinning reserve (SR). However, the traditional operation reliability analysis of power system mainly focuses on the up SR and neglects the down SR. Therefore, the operation reliability of power system considering the impacts of down SR is investigated in this paper. Firstly, the constraints of down SR are incorporated into the day-ahead unit commitment (UC) model to obtain the generation scheduling and reserve allocation of power systems. Based on the dispatch results of UC model, the re-dispatched energy and load interruption can be determined using optimal power flow (OPF) model in the real-time operation in various contingency states. Operation reliability indices are calculated based on the load curtailment to represent the reliability performances of power systems. The proposed approaches are validated using the modified IEEE reliability test system. Case studies demonstrate that down SR can improve the operation reliability of power systems.

中文翻译：

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降速备用储备对电力系统运行可靠性的影响

可再生能源的发展以及负荷需求的峰谷差异增大，导致对旋转备用（SR）的需求增加。然而，传统的电力系统运行可靠性分析主要集中在上SR，而忽略下SR。因此，本文研究了考虑向下SR影响的电力系统的运行可靠性。首先，将向下SR的约束条件纳入超前日机组承诺（UC）模型中，以获得电力系统的发电调度和备用分配。根据UC模型的调度结果，可以在各种意外状态下的实时运行中使用最优潮流（OPF）模型确定重新调度的能量和负载中断。基于负载削减来计算运行可靠性指标，以表示电力系统的可靠性能。使用改进的IEEE可靠性测试系统对提出的方法进行了验证。案例研究表明，降低SR可以提高电力系统的运行可靠性。