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The most important factor for the provision of the electromagnetic compatibility in power plants and substations is the density of the earthing network and equipotential bonding system which must be constructed with subsystems and connected to the earthing system. Besides that proper measures must be made (screening and compensation) to reduce the disturbances and their transfer to secondary systems...
The operating voltages of low-voltage control circuits in power stations and substations have become lower with the installation of digital control equipment. This significantly increases the risk of faults and malfunctions of the circuits resulting from overvoltages in the control circuits due to lightning and switching surges. Therefore, the characterization of such overvoltages is required to protect...
We present a comparison of six models representing the frequency dependence of soil electrical conductivity and permittivity, applied to the analysis of a horizontal grounding electrode subjected to typical first and subsequent lightning return stroke current. A full-wave computational model is adopted for the analysis, which is based on the antenna theory. It is shown that models by Scott, Smith-Longmire,...
Galvanic and electromagnetic interference occurring at lightning stroke, short-circuit or equipment switching may result in damage or failure of microprocessor control systems of electric power stations and substations. The EMC problem is to limit interference; its solution starts with the design of grounding and shielding systems. To continue the works, [1,2] we would like to discuss impulse characteristics...
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