FERC has rejected PJM's data center curtailment plan again, its second rejection of the proposal.

Strike two for PJM. Ten days after the Federal Energy Regulatory Commission (FERC) froze PJM's emergency power auction for data centers, FERC has now thrown out the heart of PJM's other big fix: a plan to let new data centers plug into the grid without bringing new power supply, so long as they agree to get cut off first when the grid gets tight. FERC kept two small pieces and tossed the rest, mostly because PJM's plan stomped on the states' turf. Here's what happened, and what it means for gas-fired power in our neck of the woods.