전류 및 전위 측정선의 평행배치에서 접지임피던스 상호유도 분석

Inductive Coupling Analysis of Ground Impedance on Parallel Orientation of Current and Potential Conductors

The mutual coupling between the current and potential measuring wires makes serious effect on the measurement of the ground impedance. For analyzing the effect of mutual coupling, we compared the ground impedance measured on site with the ground impedance calculated with MATLAB. When the parallel length is 10 [m], the measured ground impedance is similar with the calculated ground impedance. As the parallel length is extended over 10 [m], the error between measured ground impedance and calculated ground impedance is also increased on a large scale. We analyzed the mutual coupling by the frequency and present the inaccuracy of ground impedance quantitatively.