Title :
Gas insulated substation (GIS) for HVDC
Author :
Messerer, F. ; Boeck, W.
Author_Institution :
Inst. of High Voltage Eng. & Electr. Power Transmission, Tech. Univ. Munich, Germany
Abstract :
The paper deals with the topic of a Gas Insulated Substation (GIS) optimized for HVDC. The electric field distribution of DC systems is mainly controlled by the conductivity k of the dielectric media. Surface charge accumulation leads to field distortion. In order to prevent this phenomenon on the spacer of such systems, a conducting coating has been realised. Investigations are made with a real 145 kV-GIS-setup. The influence of the surface coating on the field distribution can be proved with this experimental setup. Numerical calculations based on the Boundary-Element-Method (BEM) are made to investigate the influence of surface resistivity and surface charge on the field distribution of a spacer. The charge accumulation on an uncoated spacer is measured, simulated and discussed. With a coated spacer it is possible to prevent this charging
Keywords :
HVDC power transmission; boundary-elements methods; electric fields; gas insulated substations; surface charging; surface conductivity; 145 kV; GIS; HVDC; boundary-element-method; charge accumulation; conducting coating; conductivity; dielectric media; electric field distribution; field distortion; field distribution; gas insulated substation; surface charge; surface charge accumulation; surface resistivity; Coatings; Conductivity; Control systems; Current measurement; Dielectrics and electrical insulation; Gas insulation; Geographic Information Systems; HVDC transmission; Substations; Surface charging;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-6413-9
DOI :
10.1109/CEIDP.2000.884054
