500kV直流线路
500 kV DC transmission line
500 kV transmission line
800kV特高压直流线路
800 kV UHVDC transmission line
800kV直流线路
800 kV UHV DC transmission line
800 kV DC transmission line
800 kV DC transmission lines
超高速交流线路保护
ultra-high-speed protection for AC transmission line
超高速直流线路保护
ultra-high-speed protection for DC transmission line
单回特高压交流线路
single circuit UHVAC line