earticle

영어

When an induced voltage by an aerial power distribution line is calculated, there would happen a very large error according to the position of induced section because the current calculation method described in the national specification does not reflect the effect of leakage current through the each pole ground and uses just a predetermined value for a shielding effect of neutral line. The methodology of this paper is based on the splitted formulae for a calculation of neutral line shielding effect with the accumulated earth return current of leakages on each pole. And it has introduced the integration concept to equalize various terminal line distance as an one same distance utilizing a factorized composition form of leakage current rate against total unbalance current flowing in a neutral line at the start point of induced section. This method enhanced an efficiency of calculation which results into an increase of accurate rate as 93 % than the one of existing method, compared to real measured values.