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Standards recognize that particular attention is required for the earthing of surge arresters which present locations for the passage of high frequency/transient currents. However, although good qualitative guidance is given in such standards, more detailed quantitative-based designs are required. This paper presents the results of simulations of surge arrester earthing systems with rod enhancements...
The following work investigates the risk of electrocution from earth potential rise at transmission substations and nearby third party locations as a result of a power system earth fault. Current earthing standards use a deterministic approach where the risk assessment considers a set of worst-case conditions. However, it is recognised that most of the parameters involved in calculating the earth...
Field experiments and computer simulations of two sectionalized horizontal earth electrodes are presented. The electrodes were energized using various voltage sources (dc, and transients of different shapes), and measurements of current and voltage magnitudes along the length of the electrode were examined. Furthermore, by incrementally increasing the length of the test electrodes, the effective length...
In this paper, experimental set and initial test results are described of low voltage DC, AC and impulse tests on a rod electrode immersed in a water reservoir of a large hydro power station. A detailed water resistivity survey indicates largely uniform temperature and resistivity throughout the reservoir. Calculations and simulations of the rod electrode under DC and power frequency AC show reasonable...
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