特高压交流试验基地的建设

国家电网公司特高压交流试验基地的建设是我国交流特高压输变电试验示范工程的重要组成部分。为了给我国特高压输电系统工程提供有力的技术支持和服务,介绍了特高压交流试验基地的总体规划、技术要求、主要试验功能和建设中的技术难点。特高压交流试验基地占地14万m2,由220kV电源系统、1km特高压单回试验线段和1km特高压同塔双回试验线段、特高压设备带电考核场、大电流升流装置、电磁环境参数测试场及屏蔽室、环境气候试验室、特高压电晕试验笼以及辅助设施等组成,其中重点就1000kV单回和同塔双回试验线段、特高压设备长期带电考核场、环境气候试验室、电磁环境测量和电晕试验笼的优化设计等进行了讨论。

Construction of UHV AC Test Base of SGCC

The UHV AC test base,with the area of about 140 000 square meters,is composed of a 220 kV power supply system,a 1 km UHV single-circuit test line,a 1 km UHV double-circuit test line in the same tower,a full voltage test yard for UHV equipment,large current up-flow device,electromagnetic environment test area and shielding chamber,climate laboratory,UHV corona test cage and other ancillary facilities.The establishment of UHV AC test base will provide sufficient test conditions for the overall research of UHV AC power transmission and transformation technology,such as the corona performance and electromagnetic environment of UHV transmission lines,the external insulation characteristic of long insulator string in conditions of low air pressure,pollution and ice,and the long-term test of UHV equipment in the case of full voltage and current.The paper introduces the layout,technical requirements,main test functions and difficulties in the construction of the UHV AC test base.The 1 000 kV single-circuit and double-circuit test lines,full voltage test yard for UHV equipment,climate laboratory,electromagnetic environment issues and optimal design of corona test cage are discussed in detail.