Hardware prototype and real-time validation of the satellite communication based Loss-of-Mains protection

This paper describes the current progress of the project developing a satellite based Loss-of-Mains (LOM) protection based on accumulated voltage phase angle difference (VPAD). In the initial stage of the laboratory trial, relay prototype in Opal-RT/RT-lab, test network modelled in RTDS/RSCAD and a commercial SEL-PMU are interconnected to establish a hardware-in-the-loop test platform. With a series of tests carefully designed for stability and sensitivity assessment, considering various generator control and load representations, the new protection scheme has been proved to have both enhanced stability and sensitivity over the existing passive LOM methods.