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What can the GEA simulator be used for?
What can the GEA simulator be used for?
The influence of the frequency- and current-dependent response of tower grounding systems on evaluating the backflash over performance of a typical 150 kV overhead transmission line is investigated. This is achieved by adopting different tower grounding system modeling approaches in ATP-EMTP simulations. The frequency-dependent response with constant or frequency-dependent soil properties for concentrated and extended tower grounding systems is computed.
Z. G. Datsios, E. Stracqualursi, D. G. Patsalis, R. Araneo, P. N. Mikropoulos, and T. E. Tsovilis, "Evaluation of the Backflashover Performance of a 150 kV Overhead Transmission Line Considering Frequency- and Current-Dependent Effects of Tower Grounding Systems," in IEEE Transactions on Industry Applications, doi: 10.1109/TIA.2023.3338132.
Computation of the magnitude and angle of the input impedances offered by a tower (including legs and lattice conductors) for overhead transmission lines.
E. Stracqualursi, R. Araneo, J. B. Faria, P. Burghignoli, A. Andreotti, and B. Kordi, "On the Transient Analysis of Towers: A Revised Theory Based on Sommerfeld-Goubau Wave," in IEEE Transactions on Power Delivery, vol. 38, no. 1, pp. 309-318, Feb. 2023, doi: 10.1109/TPWRD.2022.3191550.
Computation of the input impedance offered by the MT2 and MT4 grounding systems, typically adopted as towers grounding systems along Italian High-Voltage transmission lines.
E. Stracqualursi, G. Pelliccione, S. Celozzi, and R. Araneo, "Tower Models for Power Systems Transients: A Review," Energies, 2022, 15(13):4893, doi:10.3390/en15134893.
Computation of the harmonic impedance of grounding grids in the frequency domain, considering grids buried in homogeneous and layered soils, with constant or frequency-dependent soil properties.
E. Stracqualursi and R. Araneo, "Transient impedance of grounding grids with different soil models," 2021 IEEE International Conference on Environment and Electrical Engineering and 2021 IEEE Industrial and Commercial Power Systems Europe (EEEIC/I&CPS Europe), Bari, Italy, 2021, pp. 1-6,
doi: 10.1109/EEEIC/ICPSEurope51590.2021.9584613.
The paper illustrates a numerical procedure for the computation of mutual transient overvoltages transferred among typical grounding systems of wind turbines belonging to the same wind farm.
R. Araneo, G. Lovat, S. Celozzi and P. Burghignoli, "Numerical analysis of mutual transient voltages in grounding systems of offshore wind farms," 2018 International Applied Computational Electromagnetics Society Symposium (ACES), Denver, CO, USA, 2018, pp. 1-2, doi: 10.23919/ROPACES.2018.8364221.
Investigation on the performance of a PV plant grounding system for the prediction of the potential threats either for people working in (or animals passing through) a solar farm area and for the installed electric and electronic equipments. The transient behavior is obtained by means of an Inverse Fourier Transform. A real case study grounding system configuration is considered.
R. Araneo, M. Maccioni, S. Lauria and S. Celozzi, "Analysis of the lightning transient response of the earthing system of large-scale ground-mounted PV plants," 2017 IEEE Manchester PowerTech, Manchester, UK, 2017, pp. 1-6, doi: 10.1109/PTC.2017.7981087.
Insight on the nature of the early-time transient response of grounding systems and useful design guidelines. Potential distribution on the earth surface for different grounding system geometries are shown.
R. Araneo, and S. Celozzi, "Transient behavior of wind towers grounding systems under lightning strikes," Int. J. Energy Environ Eng. 7, 2016, pp. 235–247, doi:10.1007/s40095-015-0196-7.
Investigation of the suitability and comparison of the accuracies of two different approaches: the hybrid circuit-field approach and a fully circuital approach to predict the behavior of grounding systems.
R. Araneo, M. Maccioni, S. Lauria, A. Geri, F. Gatta and S. Celozzi, "Hybrid and pi-circuit approaches for grounding system lightning response," 2015 IEEE Eindhoven PowerTech, Eindhoven, Netherlands, 2015, pp. 1-6, doi: 10.1109/PTC.2015.7232419.
The paper investigates the appropriateness of a new testing way consisting in the use of one or more auxiliary electrodes at short distances.
G. Parise, L. Martirano, L. Parise, S. Celozzi and R. Araneo, "Safety criteria for testing ground systems within their influence zone," 2014 14th International Conference on Environment and Electrical Engineering, Krakow, Poland, 2014, pp. 301-306, doi: 10.1109/EEEIC.2014.6835883.
The paper focuses on the transient analysis of grounding systems of wind turbines, in order to fully account for resistive, inductive and capacitive couplings.
R. Araneo, G. Lovat, and S. Celozzi, "Transient response of grounding systems of wind turbines under lightning strikes," 2014 International Symposium on Electromagnetic Compatibility, Gothenburg, Sweden, 2014, pp. 1080-1085, doi: 10.1109/EMCEurope.2014.6931063.
The measurement of the ground resistance in a large grounding network requires to place current electrodes at adequate distances; rigorous ground resistance measurements may result practically impossible. The simulation program has allowed to confirm that the measurements of surface potentials with the auxiliary electrode at reduced distance are always conservative, because the error is positive.
G. Parise, L. Martirano, L. Parise, S. Celozzi and R. Araneo, "Conservative measurements of touch and step voltages by auxiliary electrodes at reduced distance," 2014 IEEE Industry Application Society Annual Meeting, Vancouver, BC, Canada, 2014, pp. 1-7, doi: 10.1109/IAS.2014.6978476.
R. Araneo and S. Celozzi, “On the safe-zone design and characterization of grounding systems,” Proceeding of the 5th International Conference on Development, Energy, Environment, Economics (DEEE-14), Florence, November 22 – 24, 2014, pp. 49 – 57.
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