Section 1221(a) of the Energy Policy Act of 2005, codified at 16 U.S.C. 824p(a), directs the Secretary of Energy to conduct an electric transmission congestion study every three years, and to prepare it in consultation with affected states and regional reliability organizations. In the study, the Department seeks to provide information about transmission congestion by focusing on specific indications of transmission constraints and congestion and their consequences. The study focuses on a specific time frame – e.g., historical trends over the past few years, and looking forward three to five years. The study is based entirely on publicly-available data and transmission-related documents.
2019 Congestion Study
In preparation for the 2019 congestion study, DOE published a Notice of “Procedures for Conducting Electric Transmission Congestion Studies” in the Federal Register in August 2018 and requested written comments by October 9, 2018. DOE subsequently extended the comment period by fifteen days to October 24, 2018. Public comments received by DOE in response to the Federal Register Notice are posted HERE.
Information about previous congestion studies is available HERE.
Annual U.S. Transmission Data Review
The U.S. Department of Energy (DOE) has broad responsibility for developing and supporting the implementation of energy policies that serve the public interest. Ensuring that timely and accurate data on key subjects is widely available to the public is one of those responsibilities. With that responsibility in mind, the Office of Electricity releases an Annual U.S. Transmission Data Review, its compilation of transmission-related data focusing on six areas: transmission infrastructure, transmission reliability, transmission utilization, transmission constraints, transmission planning, and economic congestion. This data, which is gathered from publicly-available sources, is used to inform various DOE analyses, including OE’s triennial transmission congestion studies. The report does not draw conclusions about the transmission system—it is, instead, an effort to gather publicly available data in one place and to present it in a unified framework as comparably as possible.