A power line failure outside Washington, DC, this week triggered a cascade of events that strained the PJM grid. The outage caused more than 3 gigawatts of data centers to stop drawing power nearly simultaneously, leading to voltage spikes across the grid. According to data from Ting Labs, the event caused lights across the region to flicker, though no blackout occurred. The incident highlighted the growing impact of data centers on the electrical grid, a trend experts warn will become more common.
The event, which took over 10 minutes to stabilize, was significant because it involved a large number of data centers switching to backup power almost simultaneously. PJM data showed that about 3.1 gigawatts of load vanished in about 30 seconds, with the grid struggling to balance supply and demand. The disconnected data centers represented around 3% of total demand on PJM at the time, according to Reuters. This percentage may seem small, but the grid requires near-perfect balance, and even minor fluctuations can cause problems.
Northern Virginia, home to the world’s highest concentration of data centers, is in PJM’s territory. Ricardo de Azevedo, CTO at ON.Energy, described the situation as the 'canary in the coal mine,' noting that similar events are happening more frequently. He added that without better handling of power disruptions, larger grid issues could emerge. The incident echoed a similar event two years ago on the same grid and could foreshadow more severe disruptions if data centers are not adapted to handle power fluctuations.
Source: techcrunch
