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GB/T 45906.4-2025: Substation secondary system - Part 4: Cyber security protection
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 45906.4-2025 | English | 359 |
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Substation secondary system - Part 4: Cyber security protection
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GB/T 45906.4-2025
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Basic data
| Standard ID | GB/T 45906.4-2025 (GB/T45906.4-2025) |
| Description (Translated English) | Substation secondary system - Part 4: Cyber security protection |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | F20 |
| Classification of International Standard | 29.240.10 |
| Word Count Estimation | 18,146 |
| Date of Issue | 2025-08-01 |
| Date of Implementation | 2026-02-01 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 45906.4-2025: Substation secondary system - Part 4: Cyber security protection
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT45906.4-2025
ICS 29.240.10
CCSF20
National Standard of the People's Republic of China
Substation secondary system
Part 4.Network Security Protection
Released on August 1, 2025
Implementation on February 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 2
5 General Provisions 2
5.1 Protection Principle 2
5.2 Protection system 2
6 Security Defense 3
6.1 Infrastructure Security 3
6.2 Network Structure Security 3
6.3 Network Perimeter Security 3
6.4 On-body safety 4
6.5 Operational Safety 7
6.6 Trusted Security Immunity 7
7 Safety Monitoring 8
7.1 Basic Requirements 8
7.2 Collection 8
7.3 Storage 8
7.4 Analysis 8
7.5 Alarm 8
8 Safe disposal 9
9 Security Assessment 9
9.1 Safety Verification 9
9.2 Safety Assessment 9
Appendix A (Informative) Major Cybersecurity Threats Facing Substation Secondary Systems 10
Reference 11
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 4 of GB/T 45906 "Substation Secondary Systems". GB/T 45906 has been published in the following parts.
--- Part 1.General requirements;
--- Part 2.Data and models;
--- Part 3.Communication message specifications;
--- Part 4.Network security protection;
--- Part 5.Protection, control and related equipment;
--- Part 6.Station monitoring system;
--- Part 7.Centralized monitoring system;
--- Part 8.Electrical operation error prevention;
--- Part 9.Construction specifications;
--- Part 10.Testing and inspection.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Electricity Council.
This document was prepared by the National Grid Operation and Control Standardization Technical Committee (SAC/TC446), the National Electric Power System Management and Information Exchange
The Standardization Technical Committee (SAC/TC82) will be transferred to this department for coordination.
This document was drafted by. State Electric Power Dispatching and Control Center, State Grid Shanghai Electric Power Company, Nanjing NARI Information and Communication Technology Co., Ltd.,
China Electric Power Research Institute Co., Ltd., State Grid Hubei Electric Power Co., Ltd., State Grid Beijing Electric Power Company, State Grid Jiangxi Electric Power Co., Ltd.
Company, State Grid Ningxia Electric Power Co., Ltd., State Grid Corporation of China Northwest Branch, State Grid Hebei Electric Power Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd.
Co., Ltd., State Grid Henan Electric Power Company, State Grid Qinghai Electric Power Company, China Southern Power Grid Co., Ltd., Nanjing NARI Relay Protection Electric
Co., Ltd., Beijing Kedong Electric Power Control System Co., Ltd., NARI Technology Co., Ltd., Beijing Sifang Relay Protection Engineering Technology Co., Ltd.
Company, Xuji Electric Co., Ltd., Guodian Nanjing Automation Co., Ltd., State Grid Economic and Technological Research Institute Co., Ltd., Beijing Tongchuang
Safe and Trustworthy Technology Co., Ltd.
The main drafters of this document are. Zhou Jieying, Wang Zhihua, Zhang Xiao (State Electric Power Dispatching and Control Center), Li Mingjie, Zhou Zexin, Shu Zhihuai, Zhan Xiong,
Zhu Jiang, Shao Lisong, Lü Pengfei, Liu Yu, Jin Long, Yang Weiyong, Tang Zhenyu, Liu Wei, Zhang Xiao (Hubei), Zhang Hongjie, Gao Xin, Han Meng, Li Weixun,
Chen Mingliang, Yu Jing, Wang Dan, Li Yanhe, Lin Qing, Ning Zhiyan, Shen Yan, Jia Ling, Ma Bin, Wu Jinyu, Qiu Weijie, Zhang Long, Wang Xuning, Tang Chengjun,
Shen Zhihao, Yu Yue, Li Zhongqing, Zhu Chaoyang, Li Jinsong, Meng Jiangwen, Lu Xi, Gao Minghui, Wang Peng, Chang Jiale, Sun Yu, and Liu Changqing.
introduction
In order to meet the transformation and development needs of the substation secondary system, the top-level design of the overall architecture, functions, data and equipment of the substation secondary system is realized.
Design, promote the optimization and upgrading of new power system equipment manufacturing industry, improve the overall performance and reliability level of substation secondary system, formulate this system
List standards.
GB/T 45906 "Substation Secondary System" comprehensively covers general requirements, equipment system functional requirements, project implementation and testing, etc.
The substation secondary system consists of 10 parts.
--- Part 1.General requirements. The purpose is to standardize the overall requirements and reliability, functional integration, information interaction,
Network security and other technical requirements.
--- Part 2.Data and Model. The purpose is to standardize the substation secondary system data and model framework, clarify data classification, collection
Processing requirements, modeling methods, and model configuration processes.
--- Part 3.Communication message specification. The purpose is to standardize the communication protocol set of the substation secondary system, clarify the data objects and communication
The implementation method of the service.
--- Part 4.Network security protection. The purpose is to standardize the technical requirements for security protection of substation secondary systems.
--- Part 5.Protection control and related equipment. The purpose is to standardize substation relay protection and safety automatic devices, automation equipment
Technical requirements for power equipment, power metering and power quality equipment, collection and execution equipment, communication equipment and auxiliary monitoring equipment.
--- Part 6.Station Monitoring System. The purpose is to standardize the technical requirements of the station monitoring system, including functions, performance, information exchange, etc.
--- Part 7.Centralized monitoring system. The purpose is to standardize the system architecture, functions, performance, information exchange, and
Mutual technical requirements.
--- Part 8.Electrical operation error prevention. The purpose is to standardize the overall requirements, architecture, functions and
Energy, performance and application requirements.
--- Part 9.Construction Specifications. The purpose is to standardize the overall requirements, design principles, process control and construction of substation secondary system engineering.
System and technical requirements.
--- Part 10.Testing and inspection. The purpose is to standardize the general principles and requirements for the inspection of substation secondary system equipment and systems.
Please wait.
Substation secondary system
Part 4.Network Security Protection
1 Scope
This document specifies the general principles, security defense, security monitoring and security assessment of substation secondary system network security protection.
This document applies to the design, development, procurement, deployment, maintenance, and evaluation of substation secondary system network security facilities.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 22239 Information security technology - Basic requirements for network security level protection
GB/T 36572-2018 Guidelines for Cybersecurity Protection of Power Monitoring Systems
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
cybersecurity
By taking necessary measures to prevent attacks, intrusions, interference, destruction and illegal use of the network and accidents, the network is kept stable.
The ability to ensure reliable operation and the integrity, confidentiality and availability of network data.
Note. A network is a system composed of computers or other information terminals and related equipment that collects, stores, transmits, and processes information in accordance with certain rules and procedures.
Exchange and processing system.
[Source. GB/T 22239-2019, 3.1, modified]
3.2
Ontology securityselfsecurity
The security and controllability of each module of the substation secondary system, including the security of business system software, operating system and basic software,
Safety of computers and substation secondary equipment, etc.
[Source. GB/T 36572-2018, 3.9, with modifications]
3.3
Based on trusted computing technology, the secondary system of the substation is immune to security, ensuring the security and reliability of the operating system and business system software, and preventing
Invasion by known and unknown viruses, Trojans and malicious codes.
[Source. GB/T 36572-2018, 3.10, with modifications]
3.4
entity of root of trust
Used to support the establishment and transmission of the trust chain of the trusted computing platform, and can provide external services such as integrity measurement, secure storage, and cryptographic calculation
Functional module.