EAPSI: The Estimation of a Power Grid Resiliency Metric Using Wide Area Measurements

随着电力需求的增加，可再生能源的数量持续增长。虽然使用更多的可再生能源有很多好处，但在可再生能源产生大量电力之前，还有一些问题需要解决。具体来说，电网中可再生能源的增加降低了系统的一致性和稳定性。电网惯性是评估电网稳定性的一个指标。惯性提供了在诸如大量断电之类的事件发生后系统状况将发生多大变化的信息。这也被称为系统的弹性。该项目将通过在整个网格中使用广域测量来估计网格中的惯性值。该研究将与高丽大学的李炳俊博士合作进行，李炳俊博士的研究是利用广域测量来研究系统稳定性。相量测量单元（PMU）在电网中的广泛应用提供了电网范围内的系统数据。这些广域测量允许进行以前不可能进行的分析。从添加pmu中受益的一个领域是稳定性分析。随着越来越多的可再生能源加入到系统中，这些稳定性分析将变得越来越重要。传统能源使用大型机器发电，增加了惯性，而可再生能源对系统惯性的贡献不大。当更大比例的电力来自可再生能源时，整个系统的惯性将会减少，这意味着电网的弹性将会降低。该项目的目的是利用pmu的数据来估计电网中的惯性值，以便将来可以进行额外的稳定性分析，以确保电网可以有效地利用可再生能源。美国国家科学基金会EAPSI奖与韩国国家研究基金会合作资助。

The number of renewable energy sources continues to grow as demand for electricity increases. While using more renewable energy has many benefits, there are issues that need to be addressed before large amounts of power can come from renewables. Specifically, the addition of renewables to the power grid decreases the consistency and stability of the system. One metric which allows for the assessment of power grid stability is grid inertia . Inertia provides information on how much system conditions will change after an event such as a large power loss. This is also known as the resiliency of the system. The project will estimate the value of inertia in the grid with the use of wide area measurements from locations throughout the grid. The research will be done in collaboration with Dr. Byongjun Lee at Korea University, whose research deals with system stability using wide area measurements.The widespread implementation of phasor measurement units (PMU) to the grid provides grid-wide system data . These wide area measurements allow for analysis that was not previously possible. One area that has benefitted from the addition of PMUs is stability analysis. As more renewables are added to the system, these stability analyses will become increasingly important. While traditional sources use large machines to generate power which increases the inertia, renewables do not contribute significantly to the system inertia. When larger percentages of the power generated are from renewable sources, the overall system inertia will decrease which means the power grid will be less resilient. The aim of this project is to use the data from PMUs to estimate the inertia value in the grid such that additional stability analyses can be done in the future to ensure that the grid can use renewables effectively. This NSF EAPSI award is funded in collaboration with the National Research Foundation of Korea.