This paper proposes a method to measure transmission line parameters for protective relay settings. This
method relies on synchronized phasor measurements taken at both ends of the line and compares them with the calculations from both the equivalent PI circuit and the distributed constant line parameters. This comparison determines which method provides more accuracy for determining relay settings. The method used for the calculation depends on whether the line is transposed or untransposed. The performance of the proposed method is verified using real time digital simulator and field data from
Entergy phasor measurement units (PMUs) on a transmission line. This paper discusses the data collected from the PMUs and compares the calculation from the measured data with actual relay settings. Finally, the paper proposes a method for validating the relay settings.
B. Johnson, S. Jadid, In Proc. International Conference on Power Systems Transients (IPST2015), Cavtat, Croatia, June 2015, Paper #: 15IPST037
KEYWORDS: synchronized phasor measurements, phasor measurement units, PMU, distance relay settings