Effect of Changing Grounding Mode to Reduce Power Loss on Lightning Ground Wire by Induced Current - Northern Vietnam Overhead Power Transmission Line

Abstract

AbstractIn Vietnam, the overhead power transmission lines are usually equipped with lightning ground wires, include optical fiber composite ground wire (OPGW) and common ground wire (CGW). Both lightning wires are grounded at each tower to ensure safety for transmission line but directly affect the power loss, caused by electromagnetic induction. Therefore, the calculation of quantitative power loss shows the urgent necessity to reduce the loss, by changing the grounding mode of lightning ground wire. Both field measurement and ATP-EMTP simulation of induced current and voltage of lightning ground wires in transmission lines are carried out in this paper. The results allow proposing a solution to reduce the loss on the lightning ground wire of power transmission grid.KeywordsInduced voltage and currentGround wireTransmission grid