GB/T 46810-2025Technical requirements for the security protection of power time synchronization systems based on the BeiDou navigation satellite system (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Electricity Council. This document is under the jurisdiction of the National Technical Committee on Standardization of Power System Management and Information Exchange (SAC/TC82). This document was drafted by: State Grid Electric Power Research Institute Co., Ltd., Nanjing NARI Information & Communication Technology Co., Ltd., and National Power Dispatch Center. Control Center, China Power Engineering Consulting Group North China Electric Power Design Institute Co., Ltd., China Southern Power Grid Power Dispatch and Control Center, State Grid Jiang Jiangsu Electric Power Co., Ltd., State Grid Hebei Electric Power Co., Ltd., State Energy Group Jiangsu Electric Power Co., Ltd., State Grid Sichuan Electric Power Co., Ltd. Research Institute of Power Science, State Grid Zhejiang Electric Power Co., Ltd., Jiangsu Compass Navigation & Communication Technology Co., Ltd., China Electric Power Research Institute Institute Co., Ltd., NARI Technology Co., Ltd., Zhengzhou Institute of Integrated Circuits and System Applications, State Grid Shandong Electric Power Company, State Grid Anhui Electric Power Company, Shenyang University of Technology, Beijing Jiaotong University, State Grid Sichuan Electric Power Company, State Grid Shanghai Electric Power Company State Grid Jilin Electric Power Co., Ltd., Shandong University Electric Power Technology Co., Ltd., State Grid Beijing Electric Power Company, China Southern Power Grid Digital Grid Technology (Guangdong) Co., Ltd., Chengdu Yinzhong Digital Equipment Co., Ltd., Zhengzhou Wecom Huada Beidou Navigation Technology Co., Ltd., State Grid Jiangsu Yunnan Provincial Electric Power Research Institute, Qingdao Tuowei Technology Co., Ltd., Yunnan Power Grid Co., Ltd. Information Center, Huaneng Lancang Jiangshui Hydropower Co., Ltd., Beijing Guotai Wangxin Technology Co., Ltd., Xiamen Sixin Smart Power Technology Co., Ltd., Zhuhai Oulipei State Grid Automation Co., Ltd., Shandong Kehui Electric Power Automation Co., Ltd., Shanghai Kuanyu Industrial Network Equipment Co., Ltd., State Grid Hebei Hebei Provincial Electric Power Company. The main drafters of this document are. Bian Baoyin, He Yingli, Chang Naichao, Huang Xin, Zhang Daonong, Li Jin, Zhang Qibing, Li Shiqun, Feng Shilin, and Du Qiwei. Liu Bo, Li Xiucai, Jiang Xinjun, Song Kun, Yu Yuehai, Zhang Xiaonan, Li Wenmeng, Liu Yong, Shen Xincun, Xia Mingchao, Chen Qifang, Tang Fangjian, Zhang Dawei, Ma Tao, Shi Lin, Feng Bao, Wang Zhihua, Yang Song, Jiang Chengling, Wang Chao, Li Hanzhou, Jiang Wenhui, Liu Xiaochuan, Zhao Weifeng, Fang Xin, Wu Haiyang, Hang Feilu Ma Yuejiao, Li Xin, Liao Zhouyuan, Dong Yantao, Yang Mengjuan, Ge Yulei, Zhang Jun, Tang Shibin, Wang Yajun, Liu Dongsheng, Li Lang. Safety protection technical requirements for power grid BeiDou time synchronization system

1 Scope

GB/T 46810-2025 is the Chinese national standard covering protecting the clock of a power system - the protection, the fault recorders and the synchrophasors all depend on time to the microsecond, and a spoofed satellite signal can shift that time without anything appearing to fail. First edition, and it is the security half of the timing standards published alongside the civil aviation one, GB/T 46932-2025. It was issued on 31 December 2025 and has been in force since 1 July 2026, as a first edition. The document is under the responsibility of the China Electricity Council. This page is published from the official record of the 2025 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

This document specifies the general requirements, system structure protection requirements, and system boundary protection requirements for the security protection of the power grid BeiDou time synchronization system. and equipment body protection requirements. This document applies to the design, development, production, testing, construction, and operation of power grid BeiDou time synchronization systems.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document.

GB/T 36050 Basic Provisions for Time Synchronization of Power Systems

GB/T 36470-2018 Information Security Technology - General Security Functional Requirements for Field Measurement and Control Equipment in Industrial Control Systems

GB/T 36572 Guidelines for Network Security Protection of Power Monitoring Systems DL/T 1100.1 Time Synchronization System for Power Systems - Part

1.Technical Specifications DL/T 1100.5 Time Synchronization Systems for Power Systems - Part

3 Terms and Definitions

The terms and definitions defined in DL/T 1100.1 and the following terms and definitions apply to this document.

3.1 Timing service The time synchronization device in the power grid BeiDou time synchronization system provides time synchronization services for the time-synchronized equipment.

3.2 monitoring interface External interaction interface for equipment operation and safety information in the power grid BeiDou time synchronization system.

3.3 Spoofing signal An analog satellite navigation signal that can cause a satellite receiver to output an abnormal position and/or time.

3.4 ground timing A time synchronization method that uses a communication channel to transmit time information from a ground time source to a time synchronization system.

3.5 unidirectional timing The IRIG-B code and PPS/PPM/PPH/PPD TOD technologies are used to achieve one-way transmission of time information.

3.6 Network timing Time synchronization based on Ethernet/IP networks can be achieved using technologies such as NTP/SNTP and PTP.