Influence of Arrester Installation Scheme on Line Lightning Protection Performance
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Abstract
Use of surge arrester is an effective measure to prevent the transmission line from lightning trip which is mostly caused by lightning strike. In order to reduce the lightning trip rate and improve the operation safety, the performance against shielding failure and back striking of a 500 kV single circuit line without a line surge arrester are simulated by ATP-EMTP In this paper. The influencing factors of the performance are analyzed, the installation principle of lightning arrester is put forward, and thus a comparative study of different installation schemes is carried out. The research shows that the surge arrester can effectively improve the lightning protection performance of the line. For the horizontal wire arrangement of single circuit, arrester should install at higher towers of more impulse grounding resistance on both sides of the phase conductors to prevent back striking, while of large ground obliquity on downhill side phase conductors to prevent the shielding failure. The research results are helpful to guide the line arrester installation location and design work.
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