Parameters Estimation for Short Line Using the Least Trimmed Squares (LTS)

摘要

This paper introduces a novel method to estimate positive and zero-sequence transmission line parameters for short line. The current and voltage measurements are taken from synchronized phasor measurements (PMUs) located at both terminals of the line. Current transformer saturation was induced by the close in three-phase fault to consider its effect on the estimation accuracy. The method was applied for untransposed line with two different ratios of inductive reactive to resistance (X/R). The Least Trimmed Square (LTS) estimator was used to detect and reject the incorrect data. Two different simulation tools have used for simulating and validating the proposed method.