On the distribution of lightning current among interconnected grounding systems in medium voltage grids

This paper presents the results of a first investigation on the effects of lightning stroke on medium voltage installations’ grounding systems, interconnected with the metal shields of the Medium Voltage (MV) distribution grid cables or with bare buried copper ropes. The study enables us to evaluate the distribution of the lightning current among interconnected ground electrodes in order to estimate if the interconnection, usually created to reduce ground potential rise during a single-line-to-ground fault, can give place to dangerous situations far from the installation hit by the lightning stroke. Four different case studies of direct lightning stroke are presented and discussed: (1) two secondary substations interconnected by the cables’ shields; (2) two secondary substations interconnected by a bare buried conductor; (3) a high voltage/medium voltage station connected with a secondary substation by the medium voltage cables’ shields; (4) a high voltage/medium voltage station connected with a secondary substation by a bare buried conductor. The results of the simulations show that a higher peak-lowering action on the lighting-stroke current occurs due to the use of bare conductors as interconnection elements in comparison to the cables’ shields.

[1]  S. Okabe,et al.  Grounding System Transient Characteristics of Underground GIS Substations , 2012, IEEE Transactions on Power Delivery.

[2]  Jinliang He,et al.  A Comprehensive Approach for Transient Performance of Grounding System in the Time Domain , 2015, IEEE Transactions on Electromagnetic Compatibility.

[3]  Luigi Martirano,et al.  Currents Distribution During a Fault in an MV Network: Methods and Measurements , 2016, IEEE Transactions on Industry Applications.

[4]  Cheng Gao,et al.  FDTD Calculation Model for the Transient Analyses of Grounding Systems , 2014, IEEE Transactions on Electromagnetic Compatibility.

[5]  Robert G. Olsen,et al.  Electromagnetic Coupling From Power Lines and Magnetic Field Safety Analysis , 1984, IEEE Transactions on Power Apparatus and Systems.

[6]  Elisa Francomano,et al.  The Method of Fundamental Solutions in Solving Coupled Boundary Value Problems for M/EEG , 2015, SIAM J. Sci. Comput..

[7]  R. G. Olsen,et al.  On the Exact, Carson and Image Theories for Wires at or Above the Earth's Interface , 1983, IEEE Power Engineering Review.

[8]  Elisa Francomano,et al.  A marching-on in time meshless kernel based solver for full-wave electromagnetic simulation , 2012, Numerical Algorithms.

[9]  F. Dawalibi,et al.  Transient performance of substation structures and associated grounding systems , 1994, Proceedings of Industrial and Commercial Power Systems Conference.

[10]  Lambros Ekonomou,et al.  A Heuristic Method for the Reduction of the Outage Rate of High-Voltage Substations Due to Atmospheric Overvoltages , 2018 .

[11]  G. Giglia,et al.  Automatic EMI filter design for power electronic converters oriented to high power density , 2018 .

[12]  Elisa Francomano,et al.  A multi-sphere particle numerical model for non-invasive investigations of neuronal human brain activity , 2013 .

[13]  Guido Ala,et al.  Detection of Radiated EM Transients by Exploiting Compact Spherical Antenna Features , 2011 .

[14]  Z.D. Grcev,et al.  Frequency Dependent and Transient Characteristics of Substation Grounding Systems , 1997, IEEE Power Engineering Review.

[15]  G. Giglia,et al.  ODEF: An interactive tool for optimized design of EMI filters , 2016, IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society.

[16]  Elisa Francomano,et al.  Unconditionally stable meshless integration of time-domain Maxwell's curl equations , 2015, Appl. Math. Comput..

[17]  S. Visacro,et al.  Lightning Response of Grounding Grids: Simulated and Experimental Results , 2015, IEEE Transactions on Electromagnetic Compatibility.

[18]  Elisa Francomano,et al.  A meshless approach for electromagnetic simulation of metallic carbon nanotubes , 2010 .

[19]  A. Campoccia,et al.  Simple Circuit Models for Studying Global Earthing Systems , 2007, 2007 IEEE Lausanne Power Tech.

[20]  Elisa Francomano,et al.  Towards an efficient meshfree solver , 2016 .

[21]  A. Campoccia,et al.  A Method to Evaluate Voltages to Earth During an Earth Fault in an HV Network in a System of Interconnected Earth Electrodes of MV/LV Substations , 2008, IEEE Transactions on Power Delivery.

[22]  M. Heimbach,et al.  Grounding System Analysis in Transients Programs Applying Electromagnetic Field Approach , 1997, IEEE Power Engineering Review.

[23]  Guido Ala,et al.  A simulation model for electromagnetic transients in lightning protection systems , 2002 .

[24]  Gianpaolo Vitale,et al.  EMI Analysis in Electrical Drives Under Lightning Surge Conditions , 2012, IEEE Transactions on Electromagnetic Compatibility.

[25]  Elisa Francomano,et al.  Numerical Investigations of an Implicit Leapfrog Time-Domain Meshless Method , 2015, J. Sci. Comput..

[26]  N. Nagaoka,et al.  Application of the TLM Method to Transient Simulations of a Conductor System With a Lossy Ground: Grounding Electrodes and an Overhead Wire , 2013, IEEE Transactions on Electromagnetic Compatibility.

[27]  Elisa Francomano,et al.  Electrical analogous in viscoelasticity , 2014, Commun. Nonlinear Sci. Numer. Simul..

[28]  Elisa Francomano,et al.  Smoothed Particle Electromagnetics Modelling on HPC-GRID Environment , 2012 .

[29]  S. Okabe,et al.  A Detailed Field Study of Lightning Stroke Effects on Distribution Lines , 2009, IEEE Transactions on Power Delivery.

[30]  Rosario Miceli,et al.  Physiological compatibility of wireless chargers for electric bicycles , 2015, 2015 International Conference on Renewable Energy Research and Applications (ICRERA).

[31]  Gianpaolo Vitale,et al.  Design and performance evaluation of a high power density EMI filter for PWM inverter-fed induction motor drives , 2015, 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC).

[32]  S Sekioka,et al.  Analytical Surveys of Transient and Frequency-Dependent Grounding Characteristics of a Wind Turbine Generator System on the Basis of Field Tests , 2010, IEEE Transactions on Power Delivery.

[33]  Reza Kazemi,et al.  Wideband Modeling of Large Grounding Systems to Interface With Electromagnetic Transient Solvers , 2014, IEEE Transactions on Power Delivery.

[34]  G. Valtorta,et al.  Ground Fault Temporary Overvoltages in MV Networks: Evaluation and Experimental Tests , 2012, IEEE Transactions on Power Delivery.

[35]  M. Trlep,et al.  Transient Calculation of Electromagnetic Field for Grounding System Based on Consideration of Displacement Current , 2012, IEEE Transactions on Magnetics.

[36]  S. Visacro,et al.  Response of Grounding Electrodes to Impulsive Currents: An Experimental Evaluation , 2009, IEEE Transactions on Electromagnetic Compatibility.

[37]  Rafael Alipio,et al.  Frequency Dependence of Soil Parameters: Experimental Results, Predicting Formula and Influence on the Lightning Response of Grounding Electrodes , 2012, IEEE Transactions on Power Delivery.

[38]  Mohd Amran Mohd Radzi,et al.  Lightning Surge Analysis on a Large Scale Grid-Connected Solar Photovoltaic System , 2017 .

[39]  Pietro Cassarà,et al.  A numerical method for imaging of biological microstructures by VHF waves , 2013, J. Comput. Appl. Math..

[40]  Elisa Francomano,et al.  A Meshfree Solver for the MEG Forward Problem , 2015, IEEE Transactions on Magnetics.

[41]  Zhibin Zhao,et al.  Numerical analysis of transient performance of grounding systems considering soil ionization by coupling moment method with circuit theory , 2005 .

[42]  B. Zhang,et al.  Analysis of Transient Performance of Grounding System Considering Soil Ionization by Time Domain Method , 2013, IEEE Transactions on Magnetics.

[43]  G. Giglia,et al.  Computer aided optimal design of high power density EMI filters , 2016, 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC).

[44]  C. Portela,et al.  A Methodology for Electromagnetic Transients Calculation—An Application for the Calculation of Lightning Propagation in Transmission Lines , 2007, IEEE Transactions on Power Delivery.

[45]  Elisa Francomano,et al.  A WAVELET OPERATOR ON THE INTERVAL IN SOLVING MAXWELL'S EQUATIONS , 2011 .

[46]  Leonid Grcev,et al.  Computer analysis of transient voltages in large grounding systems , 1996 .

[47]  Yaqing Liu,et al.  An engineering model for transient analysis of grounding system under lightning strikes: nonuniform transmission-line approach , 2005, IEEE Transactions on Power Delivery.

[48]  Jinliang He,et al.  Lightning transient performance analysis of substation based on complete transmission line model of power network and grounding systems , 2006, IEEE Transactions on Magnetics.

[49]  N. Nagaoka,et al.  Application of the Partial Element Equivalent Circuit Method to Analysis of Transient Potential Rises in Grounding Systems , 2011, IEEE Transactions on Electromagnetic Compatibility.

[50]  I. B. Johnson,et al.  Lightning-Current Distribution in Towers and Ground Wires , 1958, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[51]  Elisa Francomano,et al.  An augmented MFS approach for brain activity reconstruction , 2017, Math. Comput. Simul..

[52]  Zahra Pooranian,et al.  Evaluating the High Frequency Behavior of the Modified Grounding Scheme in Wind Farms , 2017 .

[53]  S. Okabe,et al.  Simulation Model for Lightning Overvoltages in Residences Caused by Lightning Strike to the Ground , 2010, IEEE Transactions on Power Delivery.