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”.

Appendix A，Appendix B and Appendix C of this specification are informative.

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 is drafted by the State Grid DC Engineering and Construction Co.，Ltd.

The participants involved in development of this specification include Shanxi Power Transmission and Transformation Engineering Company，Beijing Power Transmission and Transformation Engineering Company，Gansu Power Transmission and Transformation Engineering Company and Qinghai Power Transmission and Transformation Engineering Company.

The leading drafters of this specification are Zhu Yanjun，Tian Ziheng，Zheng Huaiqing，Ai Zhaofu，Yan Yiyun and Jiang Xiaoli.

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