Strength of Typical Gas-Insulated Substation Configurations:Composite and Combined Stresses

摘要

The strength of typical GIS configurations under composite stresses (overvoltages plus DC voltages applied at the same electrode) and combined stresses (AC and DC voltages applied at two terminals) is examined. Impacts on GIS testing and design are considered, with special attention to one of the most critical operating conditions: switching of small capacitive currents by disconnectors. (ERA citation 14:017319)