Title :
Fixed particles in coaxial SF6 arrangements at various voltage stresses
Author :
Arnold, P. ; Tenbohlen, S. ; Kohler, W. ; Riechert, U. ; Straumann, U.
Author_Institution :
Univ. of Stuttgart, Stuttgart, Germany
Abstract :
With special respect to HVDC transmission, an artificial protrusion is investigated experimentally in compressed sulphur hexafluoride (SF6) gas. Varied test parameters are voltage waveform and gas pressure. Corona inception and breakdown voltages are measured at DC and AC. Lightning and switching impulse breakdown voltages are evaluated at repeated constant amplitude stress. Composite voltage stress consisting of lightning impulse superimposed to DC bias is further examined. In this case, no significant reduction of lightning impulse breakdown voltage was observed at high gas pressure.
Keywords :
HVDC power transmission; SF6 insulation; coaxial cables; corona; electric breakdown; lightning; power cable testing; waveform analysis; AC; DC bias; HVDC transmission; artificial protrusion; coaxial SF6 arrangements; composite voltage stress; corona inception measurement; fixed particles; gas pressure; lightning impulse breakdown voltage measurement; repeated constant amplitude stress evaluation; switching impulse breakdown voltage measurement; varied test parameters; voltage waveform; Breakdown voltage; Corona; Electrodes; Lightning; Stress; Sulfur hexafluoride;
Conference_Titel :
High Voltage Engineering and Application (ICHVE), 2014 International Conference on
Conference_Location :
Poznan
DOI :
10.1109/ICHVE.2014.7035379
