An Adaptive Method for Detection and Correction of Errors in PMU Measurements

TitleAn Adaptive Method for Detection and Correction of Errors in PMU Measurements
Publication TypeJournal Article
Year of Publication2012
AuthorsDi Shi, Daniel J Tylavsky, Naim Logic
JournalIEEE Transactions on Smart Grid
Pagination1575 - 1583
Date Published12/2012
KeywordsAARD, CERTS, phasor measurement units (PMUs), RM12-002, SuperOPF

PMU data are expected to be GPS-synchronized measurements with highly accurate magnitude and phase angle information. However, this potential accuracy is not always achieved in actual field installations due to various causes. It has been observed in some PMU measurements that the voltage and current phasors are corrupted by noise and bias errors. This paper presents a novel method for detection and correction of errors in PMU measurements with the concept of calibration factors. The proposed method uses nonlinear optimal estimation theory to calculate calibration factor using a traditional model of an untransposed transmission line with unbalanced load. This method is intended to work as a prefiltering scheme that can significantly improve the accuracy of the PMU measurement for further use in system state estimation, transient stability monitoring, wide area protection, etc. Case studies based on simulated data are presented to demonstrate the effectiveness and robustness of the proposed method.

Short TitleIEEE Trans. Smart Grid