Wasted Wind Energy & Tenable Transmission During Winter Storm Elliott

represented only 0.04 and 0.4 percent of each state’s total net generation, respectively.

While wind was strong during Winter Storm Elliot, that will not necessarily be the case in every winter storm. In the face of extreme winter weather, a diversity of resources is essential to ensure that the lights stay on and to minimize the risk of blackouts when one type of generator is unable to deliver, like gas was during this recent winter storm.

All times are in Central Standard Time. Surface wind observations at 3-hour intervals. TVA’s periods of rolling blackouts are in red, while Duke Energy’s outage period is in blue .Although energy was successfully shared through the existing transmission network, that network is stretched to its limits, and as a result, excess energy, specifically wind energy, was curtailed .

At one point while TVA was experiencing blackouts on December 23, SPP alone experienced about 3 GW of wind curtailments, shown below. That 3 GW of wasted wind power is more energy than what can be produced at TVA’s largest coal plant, the Cumberland Fossil Plant, which is planned to bein 2026. Had this energy been available, it could have alleviated the Southeast’s shortage, both in terms of magnitude and duration, and kept the lights on for more households during the extreme cold.

All times are in Central Standard Time. SPP reports the amount of wind curtailed in its footprint, while MISO and PJM do not explicitly do so. To estimate the amount of wind curtailed in MISO and PJM, the 2021 annual average curtailment rate from LBNL’s “Land-Based Wind Market Report: 2022 Edition” was applied to the reported hourly wind generation profile in the two regions. TVA’s periods of rolling blackouts are in red, while Duke Energy’s outage period is in blue .

The best solution for this problem would be to create new transmission lines between areas where there is high wind energy production and areas where there is high demand for electricity.

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