Influencing factors of induced voltage and power loss of OPGW in typical T-connection distribution network

Abstract

OPGW in distribution network has both communication and lightning protection functions. Under the electromagnetic coupling of three-phase power lines, OPGW will generate induced voltage and induced current, which threatens the safety of power operation and maintenance personnel. In this paper, the typical 10 kV multi-circuit distribution line with OPGW is taken as the prototype, and the electromagnetic coupling model of 10 kV multi-circuit distribution line with OPGW is built by ATP-EMTP software. Considering the number of lines, the grounding mode of OPGW and the T-connected branch line, the influence of different operation modes on the induced voltage, induced current and power loss of OPGW on distribution line is compared and analyzed. The simulation results show that the number of lines and the grounding mode of OPGW have a great influence on the induced voltage and power loss. And there is basically no effect between the T-connected branch line and the main line. The simulation results provide a theoretical basis for the selection of OPGW parameters of 10 kV multi-circuit distribution lines.