PMU Time Error Detection Using Second-Order Phase Angle Derivative Measurements

Significant loss or corruption of time and message control bit information in reported PMU measurements can lead to a loss of data quality awareness by engineers and control center applications. In this paper, four different time-based issues encountered in PMU operation, and corresponding, unique data error propagation models in measurements of second derivative phasor angles are discussed. As part of a data post-processing step, a novel application of subsequence dynamic time warping technique is proposed for use in a similarity-based, time-series, pattern query to identify instances of PMU internal clock drift time error. Measurements from a synthetic 2,000-bus network have been used to test the effectiveness of the proposed method.