You are part of the PJM. Read into what the "Fuel Adjustment" actually is. Yes, prices are regulated, but if your area is short of power, they can buy it from the PJM, usually from other sources they own, at "market" rate not regulated rate.

The Fuel Adjustment is the legal loophole difference in the regulated rate vs the market rate. A few scheduled maintenance windows and oh look, we are short power.