Date: November 2024

At program launch, TVA considered multiple models for evaluating the energy savings achieved with Continuous Voltage Regulation (CVR) and adopted a constant energy savings model (legacy model). Seasonal assumptions of CVR factors, when combined with observed voltage reductions, provided TVA with estimates of achieved energy reductions by season. Growing interest in future expansion of CVR and related Voltage Optimization efforts spurred TVA to question the legacy model results and develop a newer, more detailed methodology for evaluating energy savings. This newer methodology also opened a window into evaluating demand savings, a previously opaque area of the CVR program. TVA was forced to rethink assumptions about the energy and demand impacts of the CVR program. Results from the newer methodology showed an inverse relationship between more extreme weather days and CVR factor. Results from the analysis also showed peak times of day saw lower CVR factors and lower energy savings.

Speakers:
Vasudha Lathey, Olivine
Kyle Lawson, TVA