PJM Interconnection

PJM Interconnection is a regional transmission organization (RTO) and grid operator coordinating the movement of wholesale electricity across all or parts of 13 eastern U.S. states and the District of Columbia, serving over 65 million people. It operates one of the world's largest competitive wholesale electricity markets, including the Base Residual Auction (BRA) capacity market mechanism that has drawn scrutiny as a key driver of rising electricity prices — particularly as hyperscaler data centers dramatically increase power demand in the region. Originally formed in 1927 as the Pennsylvania-New Jersey Interconnection, it became a FERC-regulated RTO in 2001.