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A great proportion of the extended electricity distribution network (20/0.4 kV) failures in Greece can be considered as lightning related. This paper examines the overvoltage surges, affecting crucial elements of the distribution system of Patras, Greece. Two scenarios were discussed. The first suggests that, the medium and low-voltage networks share the same grounding system and the second that,...
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...
The lightning performance of overhead transmission lines is affected by many factors. Most of those factors are nature driven and are not predictable or controllable. Of those controllable factors affecting a line's lightning performance, the one that can be dealt with most cost-effectively is the transmission line's shielding. However, at some utilities, the design and selection of the line shielding...
The lightning discharge is one of the two natural sources of electromagnetic interference. Electric and magnetic fields generated by lightning represent a serious hazard to various systems, particularly those containing sensitive electronics. As wind power generation undergoes rapid growth, lightning damages involving wind turbines have come to be regarded with more attention. This paper is concerned...
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