Power Transmission Line Failure Recognition in Cascade Disconnection Mode

• Published in: Power technology and engineering 2021-09, Vol.55 (3), p.431-437
• Main Authors: Lyamets, Yu. Ya, Martynov, M. V., Nikonov, I. Yu
• Format: Article
• Language: English
• Subjects: Electrical Machines and Networks; Energy; Energy Systems; Foundations; Geoengineering; Hodographs; Hydraulics; Power Electronics; Power lines; Power sources; Recognition; Renewable and Green Energy
• ISSN: 1570-145X; 1570-1468
• DOI: 10.1007/s10749-021-01378-0

A new approbation of the previously presented method for recognizing a failed branch in one-sided observation of a power transmission line has been carried out. A real line of short length with four branches, two of which are almost identical, is considered. The line connects a high-power source with a low-power one. Each branch is characterized by an a priori hodograph, and the observed mode is displayed by a coordinate hodograph, the expected intersection of which with the a priori hodograph of the failed branch should occur when the coordinates of the branch and the hodograph coincide. An ambiguity of the solution was found when one of the identical branches was failed, if the observation was carried out from the sending side of the line. However, when the observation was carried out from the receiving side, the failure was unambiguously recognized. It is shown that unambiguous recognition can also be provided from the sending side of the line by resorting to cascade disconnection of the line.