An Approach to Assessing Spatial Coherence of Current and Voltage Signals in Electrical Networks

In the context of energy industry decentralization, electrical networks encounter deviations power quality indices (PQI), including violations sinusoidality current and voltage signals, which increase errors in joint digital processing spatially separated signals devices. This paper addresses specific features using concept spatial coherence measurement signals. Methods for assessing during synchronized measurements are considered case PQI deviation. The example a double-ended transmission line fault location (hereafter, DTLFL) demonstrates that lower cross-correlation coefficient, higher error accuracy calculating distance to site. nature influence on DTLFL depends expression used calculate point. application normalized coefficient finding violation, was substantiated. interharmonics noise DTLFL, investigated. magnitude distortions estimating amplitude ratio between amplitudes phases fundamental distorting interharmonics. Filtration original decimated based discrete Fourier transform eliminates components frequency harmonics.