Frequency dependent and transient characteristics of substation grounding systems

Grcev, L.; Heimbach, M.

doi:10.1109/61.568238

Cited by 145 publications

(55 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…al. in [1,2,3], then the same working conditions have been adopted here: the surge current is assumed to be injected directly to the grounding electrode and the other conducting structures of a lightning protection system (LPS), i.e. air-termination and down conductors of the LPS, are not considered.…”

Section: A Description Of the Methodsmentioning

confidence: 99%

“…This work presents two simplified circuital models suitable to analyse, in time and spatial domain, the voltage distribution in a long horizontal grounding electrode and in a grounding grid when a lightning strike occurs. The developed circuital models are implemented using the software MATLAB and are validated comparing simulation results with the results obtained with the more rigorous models developed by Yaqing Liu, Zitnik and Thottappillil in [1], using the TLM (Transmission Line Method) method and Grcev in [2,3] using the electromagnetic field method. The models are simpler than the models realized with the TLM and the electromagnetic field methods, they require a shorter computational time and minor cost because an on sale commercial software for network simulation can be used.…”

Section: Introductionmentioning

confidence: 99%

“…For all these reasons the study of the grounding systems excited by a high impulse current due to a lightning strike is useful both for the design and for the verify of the systems also to practical aims. A lot of analytical and numerical models are proposed in literature in order to analyse the grounding systems during a lightning strike [1][2][3][4][5][6][7][8][9][10]. They are mainly based on two analytical methods: the transmission line method and the electromagnetic field method.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New circuital models of grounding systems and PDS for EMI analysis during a lightning strike

Cecconi

Matranga

Ragusa

2005

31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005.

View full text Add to dashboard Cite

In this paper circuital models of a Power Drive System (PDS) and of grounding systems are proposed in order to analyse Electromagnetic Interferences (EMI) induced in a PDS when a lightning current flows in the grounding system. The models have been developed adopting the network approach with lumped parameters and have been implemented using the software MATLAB. A High Frequency (HF) model suitable to simulate the impulse response of a PDS is described and a generalized method in order to calculate the lumped parameters values of grounding system models is presented. The new method takes into account the burial depth of electrodes as regards their length. The validation results of this new method are presented. It has been made comparing simulation results with the ones obtained with the more rigorous models developed by Yaqing Liu et al. in [1] and by Grcev in [2, 3] using, respectively, the Transmission Line Method (TLM)and electromagnetic field method. The grounding systems developed circuital models are simpler than those realized with the TLM and the electromagnetic field methods, they require a shorter computational time and a minor cost because an on sale software for network simulation can be used. These characteristics permit to combine the grounding system model with the PDS HF circuital model, obtaining an only model that permits to analyse EMI generated in every section of the drive during a lightning strike giving only the waveform of the lightning current in time domain. as input of the model.

show abstract

Section: A Description Of the Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New circuital models of grounding systems and PDS for EMI analysis during a lightning strike

Cecconi

Matranga

Ragusa

2005

31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005.

View full text Add to dashboard Cite

show abstract

“…The grounding topologies and lightning currents of [8], [7], and [6] were simulated with the method of this work and results were in good comparison the measured or simulated results of [8], [7], and [6]. Also, some situations for which there exist analytical expressions, were simulated in [14].…”

Section: A Description Of the Simulation Modelmentioning

confidence: 99%

Application of an electromagnetic modeling method for railway grounding systems subjected to lightning strikes

Jacqmaer

Geuzaine

Driesen

2008

2008 13th International Conference on Harmonics and Quality of Power

View full text Add to dashboard Cite

This document presents the work done for the Belgian railway operator Infrabel with respect to the modeling of grounding systems. Infrabel needed information on how to design the lightning protection systems of the recently deployed GSM-R installations. There exist many methods for simulating lightning strikes on grounding systems. One of these techniques, an electromagnetic method based on Moment Methods, is used to solve the problem. The theory behind the method is described and a novel technique is presented for simulating cylindrical cables without metal sheets. The method is applied to the grounding of the Infrabel GSM-R base station. The influence of the soil conductivity, the length of cables and grounding rods and the type of lightning strike on the effectiveness of the grounding system is researched.Index Terms-Grounding, grounding electrodes, lightning, moment methods, power system lightning effects I. FORMULATION OF THE PROBLEM NFRABEL, the infrastructure company which manages the Belgian railway lines, recently installed approximately 480 GSM-R base-transceiver stations (BTS) across Belgium. The purpose of this cellular network is to have a communication system for the personnel and a system for the transmission of signaling information (detection of trains and controlling switches). The nominal power of the BTS is 1.3 kVA and it is fed by a single-phase grid of 230 V. This voltage is rectified and stepped down in order to feed the BTS at 48 V. There are several options for supplying the BTS with electrical power, the most important one being a dedicated local connection with the distribution system. However, in some cases, because of economical reasons, another technique is used where the BTS is fed from a supply station that was normally used for the electrical supply of critical signaling infrastructure (SI). This latter situation is presented in Fig. 1. There is a cable between the supply station and the BTS and the SI is supplied from the same bus as the BTS. The supply station is a This work was part of a project supported by the Interuniversitary Attraction Poles (IAP) programme and Infrabel N.V. redundant three-phase IT-system at 1000 V. Normally, the SI is well protected against overcurrents and -voltages due to lightning because of the type of grounding and because the supply station is situated in a zone of overhead wires, connected with each other through an overhead grounding wire. The BTS have antennas on metal towers and are therefore prone to lightning strikes. Therefore, if the supply station also feeds the BTS, the chances of overvoltages in the station increase. Fig. 1. Topology of the supply and grounding system of the signaling infrastructure and the GSM base station.In order to provide a good protection against lighting, the BTS and the supply station are kept away from each other as well as possible. Infrabel enforces a minimum distance between BTS and supply station of 80 meters. Current arrestors are installed at both stations and voltage arrestors at the supply post. An isola...

show abstract

“…Waveform of lighting impulse currents is shown in Fig4, when impulse current respectively is 10 20 30kA. Safe operation of power systems and control Provincial Key Laboratory of University-funded projects Waveform of lighting impulse currents C. Experiment results and process Gradually establish circle simulation models of horizontal impulse grounding electrode [Waveform of voltage when different impulse currentImpulse resistance can be processed by R ch =U m /I m (U m is the peak potential of grounding device[7], I m is the peak impulse current), as shown in Tab 1.…”

mentioning

confidence: 99%

Impulse Characteristics of Horizontal Grounding Devices Based on Spark Discharge

Wei

Zhou

2012

2012 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring

View full text Add to dashboard Cite

Impulse characteristics of horizontal grounding devices is closely related to its Geometry size and amplitude of the impulse current. In order to make out this relation, an analytical method by ATP-EMTP to research the impulse characteristics of horizontal grounding electrode under different impulse current magnitude and geometrical dimension of grounding devices, when soil resistivity is low, is proposed in this paper. Test results have shown that impulse grounding resistance decrease with the increase of impulse current magnitude and geometrical dimension; the extent of the decline slowly diminishes and tends to be saturated.

show abstract

Frequency dependent and transient characteristics of substation grounding systems

Cited by 145 publications

References 17 publications

New circuital models of grounding systems and PDS for EMI analysis during a lightning strike

New circuital models of grounding systems and PDS for EMI analysis during a lightning strike

Application of an electromagnetic modeling method for railway grounding systems subjected to lightning strikes

Impulse Characteristics of Horizontal Grounding Devices Based on Spark Discharge

Contact Info

Product

Resources

About