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access icon openaccess Development and application of lightning flashover limited equipment for 220 kV AC transmission line

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 21/08/2018, Accepted 17/09/2018, Published 22/10/2018

In order to solve the operation problems of traditional lightning protection equipment (for example, line arrester and parallel gap) for 220 kV AC transmission line, a novel lightning protection equipment – lightning flashover limited equipment for 220 kV AC transmission line – has been developed successfully, which owns the advantages of line arrester and parallel gap. Technical parameters, and electrical and mechanical performances are researched through theoretical calculation and experimental verification, and an installation structure of new split type is designed. The results show that the lightning flashover limited equipment has good electrical and mechanical performance and meets insulation, tensile, and bending requirements. By now, more than 200 sets of lightning flashover limited equipment for 220 kV AC transmission line have been applied on lines in four provinces of China. About 2 years of operating experience show that all the sets of lightning flashover limited equipment work safely and reliably.

Inspec keywords: lightning protection; power transmission lines; flashover; arresters

Other keywords: novel lightning protection equipment; parallel gap; line arrester; time 2.0 year; lightning flashover limited equipment; AC transmission line; voltage 220.0 kV

Subjects: Power line supports, insulators and connectors; Protection apparatus

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