Protection Relays in a Model of IEEE n-Bus System using Real Time Digital Simulation

Abstract

This paper presents how to design and implement a set of protection relays in a prototype model of an IEEE n-Bus system using Real Time Digital Simulation (RTDS). A power system is constructed using RSCAD tool, a software designed to run on RTDS machine. Protection schemes are also implemented on RSCAD, in addition current and potential transformer components are placed in areas of interest on the prototype model. The signals are outputted from the RTDS Gigabit-Transceiver Analogue Output card (GTAO) then sent to the Schweitzer SEL-311L relay, which allows various protection schemes to be realized. A test and validation are designed for this model of power grid utilizing RTDS, a simulator that transmits analogue voltage and current to the designed power system in real time.