Science Daily July 19, 2018
Knowing the speed at which electricity moves, the distance between sensors, and the time it takes an oscillation to move between sensors, one can determine whether the oscillation is real. Phasor measurement units (PMUs) allow synchronous real-time measurements of voltage, phase angle, and frequency from multiple remote locations in the grid, enabled by their ability to align to (GPS) clocks. A team of researchers in the US (Clemson University, UC Santa Clara) proposes a distributed real-time wide-area oscillation estimation approach that is robust to GPS spoofing on PMUs and their associated phasor data concentrators. The approach employs the idea of checking update consistency with histories and across distributed nodes and can tolerate up to one third of compromised nodes. They have confirmed the effectiveness of the approach by numerical simulations of the IEEE 68-bus power system models… read more. TECHNICAL ARTICLE