Mode Meter: Keeping Oscillations in Check

Researchers at Pacific Northwest National Laboratory joined with colleagues at Montana Tech and the University of Wyoming to develop Mode Meter. This software uses data from advanced sensors—called synchrophasors— placed on power lines and other electrical transmission devices to obtain precise, time-synchronized data about power grid operation. More than 1,100 of the sensors are now deployed across the U.S. power system. Mode Meter analyzes the synchrophasor data to determine when power swings are growing unstable and displays the information in an easy-to-read visual tool.