Abstract The increased net load uncertainty and variability due to higher levels of renewable energy resource integration into grids require the clear understanding and quantification of grid operational flexibility (GOF) and associated impacts. However, there is no widely-accepted methodology to assess flexibility, guide policy formulation and quantify the value of operational flexibility. Recent efforts towards improved flexibility assessment have focused on feasible net load ramps, operational margins and robustness bounds. In this paper, we propose an approach to GOF assessment focused on the economic impacts related to net load variability/uncertainty accommodation. We illustrate the application of the proposed approach through representative study cases on a modified version of the IEEE Reliability Test System operated under a multi-settlement system. Our results indicate that the market outcomes provide a concrete basis for GOF assessment in general, and in particular, the impacts due to ramping limitations provide insights into a grid’s ability to accommodate net load variability/uncertainty.

中文翻译：

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构建一类电网运行灵活性指标

摘要 由于更高水平的可再生能源资源并网导致净负荷不确定性和可变性增加，需要对电网运行灵活性 (GOF) 和相关影响有清晰的理解和量化。然而，没有广泛接受的方法来评估灵活性、指导政策制定和量化操作灵活性的价值。最近改进灵活性评估的努力集中在可行的净负载斜坡、运营裕度和稳健性界限上。在本文中，我们提出了一种 GOF 评估方法，重点关注与净负荷可变性/不确定性调节相关的经济影响。我们通过在多结算系统下运行的 IEEE 可靠性测试系统的修改版本上的代表性研究案例来说明所提出方法的应用。我们的结果表明，市场结果总体上为 GOF 评估提供了具体基础，特别是由于斜坡限制造成的影响提供了对电网适应净负荷可变性/不确定性的能力的洞察。