Key Installation Points and Process Control for 800kV Converter Transformer Accessories

800kV converter transformer is the highest voltage levels in the world currently and its accessories lifting faces to many technical problems.In combination with practical experiences in construction of 800 UHVDC Fengxian transmission project,the paper introduces installation flow,construction method for 800kV converter transformer accessories,analyzes key points of installation technology and concrete issues in details.It also sums up improvements and attentions to be ignored easily during installation.