earticle

영어

If communication line was installed around power line, flowed current in the power line can give fatal effect to the communication line. This is called induction phenomenon. In the induction phenomenon, one of the important things is mutual impedance between power line and communication line. Mutual impedance equation is divided to 6 cases according to installed location and developed independently in ITU standard. But form and coefficient value of 6 equations are no significant difference. Therefore calculating mutual impedance value was performing in the way that Grant calculation-condition which meets deployment relationship of 6 cases and substitute parameters in formula. In order to compare between the six calculated mutual impedance values and confirm for gap of values. This paper is about six equations that are divided according to installed location which must be dependent or possible to unify.