Abstract
This paper surveys disturbances experienced in the low-voltage control circuits of the power stations and the substations of Kansai Electric Power. Induced voltages to an overhead control cable from a grounding mesh were measured when an impulse current was applied to the grounding mesh. A non-metallic sheath cable (CVV cable) and a cable with a metallic sheath (CVV-S cable) were tested to investigate the effect of the metallic sheath on the induced voltage to the cable. Then, a simulation model of the transient induced voltage to the overhead conductor from a counterpoise was proposed. Finally, the simulation results were compared with the measured results to confirm the accuracy of the proposed method.
