Foreword

This specification is prepared as arranged by the Notice on Printing and Distributing Industrial Standards Program of the Year 2006（Fagaibangongye〔2006〕No.1093）issued by the General Office of the National Development and Reform Commission.

This specification is proposed by China Electricity Council.

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

This specification was mainly drafted by Xiao Anquan，Chong Zhiyi，Li Yong，Huang Jie，Lu Yan，Bai Guangya，Zou Junfeng，Li Bin，who organized by the State Grid DC Project Construction Company Limited，the Extra-high Voltage Transmission Company of the China Southern Power Grid Co.，Ltd.

Any comments and suggestions about its implementation should be sent to the Standardization Center of the China Electricity Enterprise Association at the following address:No.1 Ertiao Lane，Baiguanglu Rd.，Beijing China 100761.