The authors research such existing technical problems as electromagnetic environment, over-voltage and insulation coordination, DC magnetic bias, control and protection system, stability of hybrid UHVAC/DC power grid.

• 讨论了我国±800kV特高压直流输电工程的电磁环境、过电压与绝缘配合、直流偏磁、控制保护系统、特高压交直流混合电网的稳定性等方面存在的技术问题。