The impulse grounding impedance computation in HVDC transmission line tower

Author

Li Tian-wei ; Xiang Yang ; Zhao Yu-ming

Author_Institution

Electr. Power Res. Inst., CSG, Guangzhou, China

fYear

2013

fDate

8-11 Dec. 2013

Firstpage

1

Lastpage

5

Abstract

Electromagnetic field and circuit theory combined is applied to calculate the impulse grounding impedance in HVDC transmission line towers in this paper. The mutual inductance of conductor segments are taken into account. At the same time, the images of the self resistance and mutual inductance are considered for the different medium (soil and air) interface on the surface of the ground. To calculate the impulse grounding impedance, the lightning waveform is transferred to frequency domain by FFT. Through comparison between the results in this paper and the authoritative CDEGS, the theoretical correctness is tested and proved reliable. It will provide theoretical basis for grounding optimal design and type selection, and then improve the reliability of HVDC transmission line operation.

Keywords

HVDC power transmission; earthing; electromagnetic fields; fast Fourier transforms; frequency-domain analysis; poles and towers; power transmission reliability; FFT; HVDC transmission line towers; air; authoritative CDEGS; circuit theory; conductor segments; electromagnetic field; frequency domain; grounding optimal design; impulse grounding impedance computation; lightning waveform; medium interface; mutual inductance; reliability improvement; self resistance; soil; type selection; Conductors; Electrodes; Grounding; Image segmentation; Impedance; Inductance; Leakage currents; FFT; Impulse Grounding Impedance; Numerical computation; The Transmission Line; Tower;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2013 IEEE PES Asia-Pacific

Conference_Location

Kowloon

Type

conf

DOI

10.1109/APPEEC.2013.6837279

Filename

6837279