Current Impulses in the Lightning Protection System of a Test House in Poland

Author

Maslowski, Grzegorz ; Rakov, Vladimir A. ; Wyderka, Stanislaw ; Ziemba, Robert ; Karnas, Grzegorz ; Filik, Kamil

Author_Institution

Dept. of Electr. & Comput. Eng., Rzeszow Univ. of Technol., Rzeszow, Poland

Volume

57

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

425

Lastpage

433

Abstract

The full scale test house was equipped with the lightning protection system and connected to the 15 kV/400 V transformer station. The simulated stroke current was injected into the installation with a current surge generator. Distribution of current in the lightning protection system and connected power supply installation is presented. Measurements were done for several configurations of the LPS, and for current amplitudes ranging from 1 to 10 kA. The results indicated variation with both the amplitude and the shape of the waveforms. The resistance was measured for several groundings individually and for entire grounding system with respect to the surge generator location. Measured waveforms showed frequency-dependent behavior of the circuit. Therefore, in order to improve current simulation accuracy the grounding system impedance should be considered rather than pure resistance. The vertical ground rods of the test house have capacitive impedances, while the long underground cable connected to the grounding system of the transformer has inductive impedance.

Keywords

capacitance measurement; earthing; electric resistance measurement; lightning protection; power transformer protection; surge protection; underground cables; LPS; Poland; connected power supply installation; current 1 kA to 10 kA; current impulses; current simulation accuracy improvement; current surge generator; frequency-dependent behavior; full scale test house; grounding system; grounding system impedance; inductive impedance; lightning protection system; resistance measurement; stroke current simulation; transformer station; underground cable; vertical ground rods; voltage 15 kV; voltage 400 V; Conductors; Current measurement; Generators; Grounding; Lightning; Power cables; Surges; Grounding impedance; grounding resistance; lightning current surge; lightning protection system;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2014.2382556

Filename

7042753