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GB/T 45906.3-2025Substation secondary system - Part 3: Communication message specification (English PDF)

变电站二次系统第3部分：通信报文规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 1, 2025

Implementation date

February 1, 2026

Scope

GB/T 45906.3-2025 is the English-translated version of 变电站二次系统第3部分：通信报文规范.

GB/T 45906.3-2025 is the Chinese standard "Substation secondary system - Part 3: Communication message specification". Its scope clause reads: This document specifies the communication protocol set, data frames, data objects and communication services for data interaction in substation secondary systems.

This document applies to data and file transmission between devices within the substation secondary system, and between the substation secondary system and the master station. Its clauses include terms and definitions.

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Document preview — GB/T 45906.3-2025

National Standard of the People's Republic of China

ICS: 29.240.10
Classification: F 20

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 Communication Protocol Set
6 data frame
6.1 Application Protocol Data Unit
6.2 Application Service Data Unit
6.3 Empty Data Frame
6.4 Data Frame Negotiation
6.5 Frame transmission mode
6.6 Service Port
6.7 TCP Connection Control
6.8 Error handling
6.9 Timeout and Communication Status Detection
6.10 Data Encoding
6.11 Data Frame Based on ISO /IEC /IEEE8802-3
7 Data Objects
7.1 Basic Data Types
7.2 Extended Data Types
7.3 Public ACSI Type
7.4 Functional Constraints (FC)
7.5 Control Objects
7.6 Control Block
7.7 Data Values and Definitions
8 Communication Services
8.1 Interactive Mode
8.2 Related Services
8.3 Server, Logical Device, and Logical Node Services
8.4 Data Services
8.5 Dataset Services
8.6 Fixed value services
8.7 Reporting Services
8.8 Log Services
8.9 General Substation Event Services
8.10 Multicast Sampled Value Service
8.11 Control Services
8.12 File Services
8.13 Remote Procedure Call Services
8.14 Testing Service (Test)
Appendix A (Normative) Communication Gateway Application
Appendix B (Informative) Communication Transmission Security
Appendix C (Informative) Application in Auxiliary Control and Sensor Internet of Things

1 Scope

This document specifies the communication protocol set, data frames, data objects and communication services for data interaction in substation secondary systems.

This document applies to data and file transmission between devices within the substation secondary system, and between the substation secondary system and the master station.

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 16262.1 Information technology Abstract Syntax Notation (ASN.1) Part 1.Basic notation specification

GB/T 16262.2 Information technology Abstract Syntax Notation (ASN.1) Part 2.Information object specification

GB/T 16263.2 Information technology ASN.1 encoding rules Part 2.Specification of the Reduced Encoding Rules (PER)

GB/T 33602 General Service Agreement for Power Systems

GB/T 42151.6 Power automation communication networks and systems Part 6.Power automation systems related to intelligent electronic devices

Communication Configuration Description Language

GB/T 42151.72 Electric power automation communication networks and systems Part 7-2.Basic information and communication structure Abstract communication services

Interface (ACSI)

DL/T 860 (all parts) Power automation communication networks and systems

DL/T 860.73 Electric power automation communication networks and systems Part 7-3.Basic communication structure - Common data class

DL/T 860.74 Electric power automation communication networks and systems Part 7-4.Basic communication structure - Compatible logical node classes and data

According to the category

ISO /IEC /IEEE8802-3 Information technology - Telecommunications and switching between systems - Requirements for local and metropolitan area networks - Part 3.

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Service Requester

The entity that issues the request service primitive.

GB/T 36050 | GB/T 36278 | GB/T 33592 | GB/T 45906.4 | GB/T 45906.2 | GB/T 45906.1 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 58 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

Editions of GB/T 45906.3

Edition	Title	Revision	Status
GB/T 45906.3-2025	Substation secondary system - Part 3: Communication message specification	current edition	Current

This page sells the current edition, GB/T 45906.3-2025. Earlier editions are listed for reference only.

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