Extreme cold temperatures continued across the PJM footprint Thursday, along with snow and ice associated with Winter Storm Grayson in the eastern portion of the RTO.
As of noon, Jan. 4, the preliminary peak demand for this cold snap is 136,125 megawatts set the morning of Jan. 3, 2018. The current projections show that as the peak for the week.
Following the storm on Thursday, PJM expects colder temperatures Thursday night through Sunday. The highest estimated peak load over the next three days is expected to be more than 135,000 MW on the morning of Friday, Jan. 5.
During the cold weather, PJM has had adequate power supplies and maintained operating reserve margins. There have been no concerns with fuel availability. No reliability issues are expected through the weekend.
As of 1 p.m., Jan. 4, PJM issued a heavy load voltage schedule warning. This is a precautionary measure to help maximize power transfer capability and reactive reserve for the evening peak.