Foreword

This specification is prepared according to the requirements of Fa Gai Ban Industry〔2006〕No.1093 issued by the General Office of the National Development and Reform Commission-“Notice on Printing and Distributing 2006 Industrial Standards Preparation and Modification Plan”.

This specification is proposed by China Electricity Council.

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

The specification was drafted by the State Grid DC Project Construction Company Limited.

The participants in the development of this specification also include Gansu Electric Power Transmission and Transformer Company，Shaanxi Electric Power Transmission and Transformation Company，Beijing Electric Power Transmission and Transformation Company，and Qinghai Power Transmission and Transformation Engineering Company.

The main drafters of this specification include Zhu Yanjun，Yang Yiyun，Zheng Huaiqing，Tian Ziheng，Ai Zhaofu and Jiang Xiaoli.

Any comments and suggestions on this specification，please send to the Standardization Center of China Electricity Council at the address:No.1，Ertiao，Baiguang Road，Beijing，100761.