Study of identification of shielding failure and back striking in UHVAC transmission lines

The identification of shielding failure and back striking in transmission lines is always difficult. The process of back striking and shielding failure in UHVAC transmission lines was analyzed in this paper. Because the mechanisms of produced transient zero module current and its propagation paths w...

Full description

Saved in:
Bibliographic Details
Main Authors: Shu Hong-chun, Zhang Guang-bin, Zhu Zi-zhao, Zhu Sheng-qiang
Format: Conference Proceeding
Language:English
Subjects:
back striking
Electromagnetic modeling
electromagnetic transient
Grounding
Impedance
Insulation
Lightning
Poles and towers
Power system transients
Protection
Protective relaying
shielding failure
Transmission lines
UHVAC
wavelet energy
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The identification of shielding failure and back striking in transmission lines is always difficult. The process of back striking and shielding failure in UHVAC transmission lines was analyzed in this paper. Because the mechanisms of produced transient zero module current and its propagation paths were different between back striking and shielding failure, their wavelet energy of different frequency bands of transient currents were different. Thereby, from the perspective of protective relaying, this paper proposes an identification method to shielding failure and back striking in transmission lines based on wavelet transform. All data can be acquired from high speed relay protection device. And the results of PSCAD/EMTDC simulation show the effectiveness of the proposed method.
ISSN:2156-9681
DOI:10.1109/SUPERGEN.2009.5347905