Synchrophasors produced by phasor measurement units (PMUs) are widely used in modern power systems for wide-area monitoring, protection and control applications. Contemporary technology allows a PMU to acquire its instantaneous voltage and current inputs digitally from sampled values (SV). This work investigates the electrical performance of two commercial PMUs with SV input in accordance with prevailing IEC/IEEE standards. The paper also presents a performance comparison of PMUs with SV input against ones with conventional hardwired analogue input. A digital real-time simulator is used to generate theoretical test signals and publish SV (as per IEC 61869-9) into PMUs under test. Both steady-state and dynamic performance of PMUs are evaluated using a test automation and analysis tool. It is evident from the results obtained that PMUs with SV input, when correctly interfaced, produce robust and accurate measurements.
D. R. Gurusinghe, S. Kariyawasam and D. Ouellette, Presented at the 15th International Conference on Developments in Power System Protection, DPSP, Liverpool, 9 - 12 March, 2020
KEYWORDS: Phasor measurement unit, synchrophasors, sampled values (SV), IEC / IEEE 60255-118-1, digital real-time simulator