Forewords

This specification is established as arranged by the Notice on Printing and Distributing of Revision Plan of Electric Power Industry Standards in 2006 issued by the General Office of National Development and Reform Commission.It is developed based on the relevant national standards，while incorporating the construction experiences from Gezhouba-Shanghai DC transmission project，Tianshengqiao-Guangzhou DC transmission project，Sanxia-Changzhou DC transmission project，Guizhou-Guangdong Circuit I DC transmission project，Sanxia-Guangdong DC transmission project，Sanxia-Shanghai DC transmission project and the design characteristics of±800kV UHVDC transimission projects.This specification specifies the construction requirements and acceptance criteria of electrodes in±800kV and below DC transmission.

The specification was proposed by China Electricity Council.

This specification is under the jurisdiction and interpreted by the Technical Committee of Standardization for HVDC Power Transmission.

The specification was mainly drafted by Xiao Anquan，Chong Zhiyi，Peng Hao，Zou Junfeng，Cheng Jian，Zhao Huazhong，Huang Cengshu，Sun Zhongming and Wang Maozhong，who organized by DC Transmission Project Construction Co.，Ltd.of the State Grid Corporation of China，and the Extra High Voltage Transmission Company of the China Southern Power Grid Co.，Ltd.