A Preliminary Study on the Role of Energy Storage and Load Rationing in Mitigating the Impact of the 2021 Texas Power Outage

Ali Menati, Le Xie
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引用次数: 8

Abstract

In February 2021, an unprecedented winter storm swept across the U.S., severely affecting the Texas power grid, leading to more than 4.5 million customers' electricity service interruption. This paper assesses the load shedding experienced by customers under realistic scenarios in the actual power grid. It also conducts a preliminary study on using energy storage and load rationing to mitigate rotating blackout's adverse impact on the grid. It is estimated that utility-scale battery storage systems with a total installed capacity of 920 GWh would be required to fully offset the load shedding during the Texas power outage if energy storage were the only technical option. Our simulation result suggests that implementing 20 percent load rationing on the system could potentially reduce this estimated energy storage capacity by 85 percent. This estimate is obtained using the predicted capacity and demand profile from February 15 to February 18, 2021. Recognizing the fact that it would be very challenging to practically deploy energy storage of this size, approaches to provide more granular demand reduction are studied as a means of leveraging the energy storage to maximize the survivability of consumers. Preliminary case study suggests the potential of combining load rationing and proper sizing of energy storage would potentially provide much reliability improvement for the grid under such extreme weather conditions.
储能和负荷配给在缓解2021年德克萨斯州停电影响中的作用初步研究
2021年2月,一场前所未有的冬季风暴席卷美国,严重影响了德克萨斯州的电网,导致450多万客户的电力服务中断。本文对实际电网中用户在实际场景下所经历的减载进行了评估。并对利用储能和负荷配给来缓解旋转停电对电网的不利影响进行了初步研究。据估计,如果储能是唯一的技术选择,则需要总装机容量为920吉瓦时的公用事业规模的电池储能系统来完全抵消德克萨斯州停电期间的负荷减少。我们的模拟结果表明,在系统上实施20%的负荷配额制可能会使估计的储能容量减少85%。这一估计是根据2021年2月15日至2月18日的预测容量和需求概况得出的。认识到实际部署这种规模的储能是非常具有挑战性的,因此研究了提供更细粒度需求减少的方法,作为利用储能以最大限度地提高消费者生存能力的手段。初步的案例研究表明,在这种极端天气条件下,将负荷配给和适当规模的储能相结合的潜力可能会大大提高电网的可靠性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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