Title :
Long term performance verification of high voltage DC GIS
Author :
Mendik, M. ; Lowder, S.M. ; Elliott, F.
Author_Institution :
ABB High Voltage Technol. Ltd., Zurich, Switzerland
Abstract :
In order to determine feasibility of SF6 gas insulated equipment for HVDC substation technology, a testpole was built and subjected to a long term test of 2 years. The test pole consisted of slightly modified commercially available 550 kV AC and 800 kV AC gas insulated components. The components were SF6-air bushings, an air insulated arrester, a SF6 insulated arrester, a SF6 oil bushing, disconnecters, bus ducts and conical spacers. Testing involved continuous DC stress (500 kV and 600 kV) lightning and switching impulse tests, polarity reversal tests and ultrasonic partial discharge measurements. Thermal cycling was performed during de load and went uninterrupted for more than 1 year. No internal breakdowns occurred during any tests. Visual inspection of the spacers at various times during tests and final disassembly revealed no visible flashover traces. The testing has demonstrated that the gas insulated technology is well suited for commercial HVDC applications
Keywords :
HVDC power transmission; SF6 insulation; electric breakdown; gas insulated substations; insulation testing; 500 kV; 550 kV; 600 kV; 800 kV; HVDC substation technology; SF6; SF6 gas-insulated substations; air bushings; air insulated arrester; bus ducts; conical spacers; disconnecters; oil bushing; thermal cycling; visual inspection; Arresters; Gas insulation; Geographic Information Systems; HVDC transmission; Impulse testing; Insulators; Oil insulation; Petroleum; Substations; Voltage;
Conference_Titel :
Transmission and Distribution Conference, 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5515-6
DOI :
10.1109/TDC.1999.756101
