Changing sensitivity to cold weather in Texas power demand.

Area of Science:

• Energy economics
• Climate change impacts
• Power systems analysis

Background:

• Texas experienced a significant electricity crisis during the February 2021 cold wave.
• Increased adoption of electric heating in Texas over the past two decades has been observed.
• Understanding electricity demand's response to temperature is crucial for grid reliability.

Purpose of the Study:

• To quantify the impact of increased temperature sensitivity on electricity demand in Texas during the 2021 blackout.
• To analyze the historical trend of electricity demand's responsiveness to temperature.
• To assess the implications for regions pursuing heating electrification.

Main Methods:

• Utilized 20 years of hourly electricity demand and temperature data for Texas.
• Employed econometric methods to estimate the relationship between temperature and electricity demand.
• Calculated the counterfactual electricity demand had temperature sensitivity remained at early 2000s levels.

Main Results:

• Electricity demand in Texas has become significantly more responsive to cold temperatures over the last 20 years.
• During the February 2021 event, average electricity demand was 8% higher than it would have been without this increased sensitivity.
• Peak hour demand was approximately 10,000 MW higher during the event due to heightened cold weather responsiveness.

Conclusions:

• The study reveals a notable increase in the demand side's sensitivity to cold weather extremes in Texas.
• This heightened sensitivity, driven by factors like increased electric heating, poses a risk to grid stability during cold snaps.
• Findings are critical for other regions electrifying heating to manage demand-side risks and ensure grid resilience.