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Grounding Grids Transient Simulation
IEEE Transactions on Power Delivery, 2005A transient grounding grid numerical model is developed. The results are compared with measurements done by other authors. The agreement between the simulations and measured data are completed with the comparison with theoretical results and concepts. Several cases with different soil parameters and grid geometry are presented.
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Study on characteristics of grounding impedance of large grounding grid
2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2017As the large grounding grid occupies large area, the potential difference on the grounding grid is obvious, and the proportion of inductive components in the grounding impedance is larger. Then the design and the operation of the grounding grid are different from the small grounding grid. The paper studies the characteristics of resistive component and
Zhizhong Li +3 more
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A Practical Approach for Determining the Ground Resistance of Grounding Grids
IEEE Transactions on Power Delivery, 2006This paper starts from the premise that ground resistance is independent of earth-fault current and presents a new method for calculating the ground resistance of grounding grids using the finite-element method. The results obtained using the method proposed are compared with results measured experimentally and results published by other authors.
null Guemes-Alonso +3 more
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Interconnections criteria of grounding grids in global grounding systems
2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS), 2018A Global Grounding System is defined as the combination of local grounding systems, obtained by their interconnection, which ensures, thanks to their proximity, that no dangerous touch voltages can arise. The interconnection of grounding systems via the armors of the MV cables, between secondary substations and HV/MV stations is herein analyzed to ...
M. L. DI Silvestre +7 more
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Indirect impact of lightning discharge on a grounding grid
2010 30th International Conference on Lightning Protection (ICLP), 2010The paper deals with an indirect impact of the lightning discharge on a grounding grid. To analyze the electromagnetic coupling between the electromagnetic wave generated by an indirect lightning strike and grounding system we use the concept of electric dipole to calculate the lightning induced and the transmission line approximation combined with ...
Harrat, B. +4 more
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Fundamental Considerations and Impluse Impedance of Grounding Grids
IEEE Transactions on Power Apparatus and Systems, 1981The impulse impedance of a grounding grid must be known for determining its performance while discharging impulse currents to ground if problems concerning lightning protection and transients under ground faults are to be accurately analysed. This paper out-lines the basic concepts required for this study, analyses the equivalent circuit ,21]of a ...
R. Verma, D. Mukhedkar
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Evaluation of the Accuracy of Grounding Impedance Measurement of Grounding Grid
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2009Recently, the common grounding systems are adapted in most large structures. Since the ground resistance is insufficient to evaluate the performance of grounding systems, it is needed to measure grounding impedance. Even though the methods of measuring grounding impedance of large grounding systems are presented in IEEE standard 81.2, but they have not
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An Effective Semianalytical Method for Simulating Grounding Grids
IEEE Transactions on Industry Applications, 2013The analytical study of grounding systems is only possible for basic electrodes, i.e., hemispherical and spherical electrodes, rods, and horizontal wires. However, it is normal practice to employ more complex earthing systems, such as grounding grids integrated with rods, in order to obtain lower resistances to ground and improve the electrical safety ...
FRESCHI, FABIO +2 more
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Smart Grid Information Exchange – Securing the Smart Grid from the Ground
2013The Smart Grid is based on information exchange between various stakeholders using open communication technologies to control the physical electric grid through the information grid. Protection against cyber attacks is essential to ensure a reliable operation of the Smart Grid.
Steffen Fries, Rainer Falk, Ariane Sutor
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Cathodic Protection of Grounding Grids
2018This chapter contains the corrosion theory of grounding electrodes and basic electrochemistry in corrosion reactions. It contains also the forms of substation grounding grid corrosion (uniform corrosion, pitting corrosion, galvanic corrosion, microbial influenced corrosion), survey on corrosion rate of substation grounding grid, copper and steel ...
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