Title :
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
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;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2013 IEEE PES Asia-Pacific
Conference_Location :
Kowloon
DOI :
10.1109/APPEEC.2013.6837279
