Foreword

This standard is prepared as required by the Notice on Issuance of Development & Revision Plan for Industry Standards in 2006 issued by the General Office of National Development and Reform Commission（Fagaibangongye〔2006〕Document No.1093）.

This standard specifies the scope，procedures，technical requirements and depth with respect to studies in±800kV UHVDC transmission and system design of converter station.

The function specifications widely used in DC transmission engineering in China serve as a programmatic document in this field.A set of demonstrated function specifications which suits the actual situation in China is available through practices in a number of HVDC projects，such as Gezhouba-Shanghai，Tianshengqiao-Guangdong，The Three Gorges-Changzhou，The Three Gorges-Guangdong，Guizhou-Guangdong Circuit I，The Three Gorges-Shanghai，and Lingbao back-to-back projects.This standard is developed by summarizing the aforesaid function specifications，and extensive experience in design，manufacturing，commissioning and operation.Reference is also made to foreign and domestic research results in ultra-high voltage direct current（UHVDC）transmission technologies in recent years and related national and IEC standards.

Appendices A，B，C，D，E，F and G to this standard are normative.

This standard is proposed by China Electricity Council.

This standard is solely managed and interpreted by the Technical Committee of Standardization for HVDC Power Transmission.

The leading drafters of this standard:

State Grid DC Project Construction Company Limited and China Southern Power Grid

Technology Research Center.

The leading authors of this standard:

Ma Weimin　Tao Yu　Nie Dingzhen　Gao Bin　Yang Jin'gen　Hu Jinsong

Li Ya'nan　Zhang Min　Li Xiaolin　Huang Ying

Any comments and suggestions proposed during the implementation of this standard are to be referred to the Standardization Center of China Electricity Council at the address of No.1，Ertiao Lane，Baiguang Road，Xuanwu District Beijing 100761，China.