ZGW2-816/J5500-40型特高压直流隔离开关通流能力提升方案

Improvement Scheme of Current Capacity for ZGW2-816/J5500-40 UHV DC Isolating Switch

特高压直流隔离开关是特直流输电系统的重要组成设备,一旦发生故障就将影响直流输电通道的可靠性。结合ZGW2-816/J5500-40型特高压直流隔离开关的结构,通过分析、计算,提出了增加隔离开关接线端子和软连接处设计面积的改进方案。应用该研究成果的特高压直流隔离开关已通过型式试验,并成功应用于昆柳龙混合多端直流工程。

UHVDC isolating switchis an important component of UHVDC transmission system.If it fails,it will affect the reliability of HVDC transmission channel.Based on the structure of ZGW2-816/J5500-40 UHVDC isolating switch,through analysis and calculation,the improvement scheme of increasing the design area of the connection terminal and soft connection of the disconnector is proposed.The test results show that the improved scheme determined according to the idea can improve the current capacity of the isolating switch.