Construction of UHV AC test base of SGCC

摘要

The construction of UHV AC test base of SGCC is an important component of the test demonstrationproject of UHV AC power transmission and transformation in China. The UHV AC test base, with thearea of about 140,000 square meters, is composed of a 220 kV power supply system, a 1 km UHVsingle-circuit test line, a 1 km UHV double-circuit test line in the same tower, a full voltage test yardfor UHV equipments, large current up-flow device, electromagnetic environment test area andshielding chamber, climate laboratory, UHV corona test cage and other ancillary facilities. Theestablishment of UHV AC test base will provide sufficient test conditions for the overall research ofUHV AC power transmission and transformation technology, such as the corona performance andelectromagnetic environment of UHV transmission lines, the external insulation characteristic of longinsulator string in conditions of low air pressure, pollution and ice, and the long-term test of UHVequipments in the case of full voltage and current. The paper introduces the layout, technicalrequirements, main test functions and difficulties in the construction of the UHV AC test base. The1000kV single-circuit and double-circuit test lines, full voltage test yard for UHV equipments, climatelaboratory, electromagnetic environment issues and optimal design of corona test cage are discussed indetail.