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GB/T 45418-2025: General technical directives for distribution networks
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General technical directives for distribution networks
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GB/T 45418-2025
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Basic data | Standard ID | GB/T 45418-2025 (GB/T45418-2025) | | Description (Translated English) | General technical directives for distribution networks | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F21 | | Classification of International Standard | 29.240.01 | | Word Count Estimation | 26,211 | | Date of Issue | 2025-02-28 | | Date of Implementation | 2025-06-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45418-2025: General technical directives for distribution networks---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
GB/T 45418-2025 English version. General technical directives for distribution networks
ICS 29.240.01
CCSF21
National Standard of the People's Republic of China
General technical guidelines for distribution networks
Released on 2025-02-28
2025-06-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Basic Regulations 4
5 Planning 4
5.1 General requirements 4
5.2 Power supply area division and planning period 5
5.3 Electricity supply and demand forecast 5
5.4 Distribution network power supply safety criteria 6
5.5 Short-circuit current level and neutral point grounding method 6
6 Grid structure and equipment 6
6.1 General requirements 6
6.2 10kV distribution network framework 7
6.3 10kV overhead line 8
6.4 10kV cable line 8
6.5 10kV overhead line equipment 8
6.6 10kV station room equipment 9
6.7 220V/380V distribution network 9
7 Construction and renovation 10
7.1 General requirements 10
7.2 Overhead lines 10
7.3 Cables and channels 11
7.4 Switching station, ring network room and distribution room 11
7.5 10kV Neutral Point Grounding Method Modification 11
8 Operation and maintenance 12
8.1 General requirements 12
8.2 Inspection and maintenance 12
8.3 Inspection and emergency repair 12
8.4 Operation Analysis 13
9 User and power access 13
9.1 General requirements 13
9.2 User Access 13
9.3 Distributed power supply and energy storage device access 14
9.4 Access to charging and swapping facilities14
10 Secondary System 15
10.1 General requirements 15
10.2 Relay protection 15
10.3 Distribution Automation 16
10.4 Electric Energy Harvesting 16
10.5 Power Distribution Communication 16
Appendix A (Informative) Schematic diagram of typical 10kV overhead network structure 17
A.1 Radial 17
A.2 Multi-segment single contact 17
A.3 Multi-segment Moderation 17
Appendix B (Informative) Schematic diagram of typical grid structure of 10kV cable network 18
B.1 Single ring 18
B.2 Double shot 18
B.3 Opposite beam 18
B.4 Double ring type 18
B.5 N supply one spare (2≤N≤4) 19
Appendix C (Informative) 220V/380V distribution network structure diagram 20
Reference 21
Foreword
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.
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 is proposed and coordinated by the China Electricity Council.
This document was drafted by. State Grid Beijing Electric Power Company Electric Power Research Institute, China Electric Power Research Institute Co., Ltd., State Grid
Co., Ltd., State Grid Shanghai Electric Power Company, Guangdong Power Grid Co., Ltd. Guangzhou Power Supply Bureau, State Grid Zhejiang Electric Power Co., Ltd. Jiaxing Power Supply
Power Company, State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute, State Grid Nanjing Control System Co., Ltd., Gansu Dentsu Electric Power Engineering Co., Ltd.
Cheng Design Consulting Co., Ltd., China Southern Power Grid Research Institute Co., Ltd., State Grid Jibei Electric Power Co., Ltd. Qinhuangdao Power Supply Company,
Beijing Huisi Huineng Technology Co., Ltd.
The main drafters of this document are. Li Hongtao, Hou Yiming, Ning Xin, Gui Yuan, Liu Wei, Xu Chang, Liao Tianming, Cai Yueming, Wang Jianzhong, Sun Jian, Pang Mingyuan,
Lu Qi, Ji Kunhua, Yu Haiping, Yang Qiaoyin, Yuan Yubo, Mao Zhiyu, Hou Shichang, Cui Lizhong, Hao Liang.
General technical guidelines for distribution networks
1 Scope
This document specifies the planning, grid structure and equipment, construction and transformation, operation and maintenance, users and
Technical requirements for power supply access, secondary system, etc.
This document is applicable to the planning, construction, transformation and operation and maintenance of 10kV and below AC distribution networks, and can be used as a reference for 20kV distribution networks.
2 Normative references
The contents of the following documents constitute 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 156 Standard Voltage
GB 3096 Acoustic Environment Quality Standard
GB/T 12325 Power quality supply voltage deviation
GB/T 13955 Installation and operation of residual current operated protective devices
GB/T 14285 Technical specification for relay protection and safety automatic devices
GB.20052 Energy efficiency limit values and energy efficiency grades for power transformers
GB/T 29328 Technical specification for power supply and self-provided emergency power supply configuration for important power users
GB/T 33593 Technical requirements for grid-connected distributed power sources
GB/T 33982 Technical Specification for Grid-connected Relay Protection of Distributed Generation
GB/T 36278 Technical specification for connecting electric vehicle charging and swapping facilities to distribution networks
GB/T 36547 Technical regulations for the connection of electrochemical energy storage power stations to the power grid
GB/T 36572 Guidelines for network security protection of power monitoring systems
GB/T 43025 Technical Guidelines for Power Supply Schemes for User Access to the Grid
GB/T 43456 Electricity inspection specification
GB/T 43526 Technical regulations for the connection of user-side electrochemical energy storage systems to distribution networks
GB 50053 Design specification for substations 20kV and below
GB/T 50064 Overvoltage protection and insulation coordination design specification for AC electrical equipment
GB/T 50065 Grounding design specification for AC electrical installations
GB 50168 Construction and acceptance standard for cable lines for electrical installation projects
GB 50217 Design standard for power engineering cables
GB 51302 Design standard for overhead insulated distribution lines
DL/T 599 Technical Guidelines for Transformation of Medium and Low Voltage Distribution Networks
DL/T 814 Technical Specification for Distribution Automation System
DL/T 1344 Technical Specification for Interference User Access to Power System
DL/T 1649 Technical Specification for Distribution Network Dispatching Control System
DL/T 5220 Design specification for overhead distribution lines up to 10kV
DL/T 5729 Technical Guidelines for Distribution Network Planning and Design
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