Field Test of Impulse Characteristic of Ground Mesh
Jianming Li · Power System Technology · 2010
Using unequal potential model of ground mesh and ignoring the nonlinear situation due to spark discharge in soil, the impulse grounding test of ground mesh for 110 kV substation being operated is performed by low capacity impulse current generator; the transient waveforms of impulse potential rises excited by different amplitudes of impulse current are measured at the points inside and outside the ground mesh; the impulse flow dispersion rule, dynamic time variation and impulse impedance characteristic of grounded tower and ground mesh are analyzed; the impulse potential distribution map of ground mesh based on test data is given.