Title :
Charge accumulation on insulating spacers for HVDC GIS
Author :
Nitta, T. ; Nakanishi, K.
Author_Institution :
Mitsubishi Electr. Corp., Hyogo, Japan
fDate :
6/1/1991 12:00:00 AM
Abstract :
A capacitive probe measurement that can be used to quantify the charge density on solid insulators is introduced. Studies performed in the development of a ±125 kV high-voltage DC (HVDC) gas-insulated converter station and ± 500 kV HVDC switchgear (HVDC-GIS) are reviewed. The properties and mechanisms of surface charging, the optimum design of the spacer and its breakdown characteristics are summarized. Problems associated with capacitive probe measurement of surface charge and a practical solution to obtain the charge distribution on the spacer are presented
Keywords :
electric breakdown of solids; gaseous insulation; insulators; power convertors; switchgear testing; HVDC switchgear; breakdown characteristics; capacitive probe measurement; charge density; charge distribution; gas-insulated converter station; gas-insulated switchgear; insulating spacers; solid insulators; surface charging; Charge measurement; Current measurement; Density measurement; Geographic Information Systems; HVDC transmission; Insulation; Probes; Solids; Surface charging; Switching converters;
Journal_Title :
Electrical Insulation, IEEE Transactions on
