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access icon openaccess Study on pollution flashover characteristic of insulators on 500 kV AC transmission lines in high-altitude area

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 14/09/2018, Accepted 19/09/2018, Published 12/11/2018

Pollution flashover performance of insulators is one of the key factors to be considered in the selection of external insulation for transmission lines at high-altitude areas. In pollution laboratories at Tibet high-altitude test base and Beijing ultra high voltage direct current (UHVDC) test base, artificial pollution tests of insulators adopted in AC 500 kV transmission project are performed both in sea-level region and real high-altitude regions, through which flashover voltages at typical equivalent salt deposit density are obtained. The relationship between altitude and flashover voltage is acquired as well.

Inspec keywords: insulator testing; power transmission lines; insulation; flashover

Other keywords: equivalent salt deposit density; Beijing UHVDC test base; insulator testing; flashover voltages; external insulation; pollution flashover characteristics; Tibet high-altitude test base; AC transmission line project; voltage 500.0 kV; artificial pollution testing

Subjects: Power line supports, insulators and connectors; a.c. transmission; Insulation and insulating coatings; Gaseous insulation, breakdown and discharges; Dielectric breakdown and discharges

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