< Back to All Stakeholder Questions and Answers
What are the inputs that go into the transmission study? What are the outputs of this study and how does it relate to CETL/CETO values?
Dominion Energy is in the process of reviewing and analyzing the results of a Dominion Energy Transmission Study (Study) conducted by a third-party regarding import capability for the Dominion Zone.
This Study used the PJM 2023 Region Transmission Expansion Plan cases (RTEP) for transmission infrastructure, load forecast and generation assumptions. In addition, Dominion Energy included the Coastal Virginia Offshore Wind (CVOW) project and its related transmission infrastructure in the RTEP. The Study evaluated three sets of equipment ratings based on temperatures, load levels, and generation profiles.
The RTEP assumed that planned transmission infrastructure for 2028 was in service, but to allow for uncertainty in the completion of these projects (such as size and complexity of supply chain and permitting), the 2028 limits were not applied to the RTEP until 2033. The Study applied contingencies (i.e., removed individual pieces of equipment) in accordance with NERC risk requirements.
The Study differs from the PJM CETO/CETL Analysis. For example, the Study includes imports from Duke Energy. Additionally, the Study was for the year 2028 and included future transmission projects, unlike the PJM CETO/CETL analysis which was only for the year 2025/2026.
The output of the Study is the seasonal import capability for Dominion Energy Zone, which is the starting point for determining the import capabilities for the Dominion Energy Load Serving Entity.