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GB/T 44768-2024 English PDF

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GB/T 44768-2024: Guide for theoretical calculation of distribution network line loss
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Basic data

Standard ID	GB/T 44768-2024 (GB/T44768-2024)
Description (Translated English)	Guide for theoretical calculation of distribution network line loss
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	F20
Classification of International Standard	29.240
Word Count Estimation	17,145
Date of Issue	2024-10-26
Date of Implementation	2025-05-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 44768-2024: Guide for theoretical calculation of distribution network line loss

---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/GBT44768-2024
ICS 29.240 CCSF20 National Standard of the People's Republic of China Guidelines for the theoretical calculation of line losses in distribution networks Released on October 26, 2024 Implementation on May 1, 2025 State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Requirements 2 5 Theoretical calculation of power loss of AC distribution network components 3 6 Theoretical calculation of power loss of DC distribution network components 3 7 Theoretical calculation of AC distribution network line loss 4 8 Theoretical calculation of DC distribution network line losses 4 9 Summary of theoretical line loss of distribution network and calculation of theoretical line loss rate 5 Appendix A (Informative) Theoretical Calculation Method for Line Losses in Medium and Low Voltage Distribution Networks 6 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. 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 Hebei Electric Power Co., Ltd., State Grid Corporation of China, State Grid Economic and Technological Research Institute Co., Ltd., China Electric Power Research Institute Co., Ltd., Guangdong Power Grid Co., Ltd., State Grid Hebei Electric Power Co., Ltd. Xingtai Power Supply Branch, State Grid Shanghai Electric Power Company Economic and Technical Research Institute, State Grid Jiangsu Electric Power Company Electric Power Research Institute, Zhengzhou Dafang Software Co., Ltd. Co., Ltd., State Grid Shandong Electric Power Company, Tianjin University, and Hubei Huazhong Electric Power Technology Development Co., Ltd. The main drafters of this document are. Liu Changjiang, Jiang Mu, Duan Zhiguo, Liu Liping, Feng Tao, Sun Chongbo, Hu Ping, Han Jinglin, Han Tianhua, Yuan Kai, Zhang Ziyan, Wei Bin, An Haiyun, Wu Xiangming, Wang Tao, Song Yi, Cao Huazhen, Jiang Shigong, Liu Zhongjian, Qian Ruixin, Xu Wei, Guo Lei, Wang Mingdong, Guo Weiwei, Guo Jianbin, Qiao Hui, Li Jianfeng, Li Hongtao, Song Nan, Xu Xiaobin, Han Guang, Yao Quan, Li Zheng, Sun Qiang, Zhou Qian, Shen Jingjing, Shi Weiguo, Xie Hongtao, Hao Quan, Qi Xiaoguang, Wang Wenbin, Meng Yan, and Wang Peisheng. Guidelines for the Theoretical Calculation of Line Losses in Distribution Networks 1 Scope This document specifies the general requirements for the theoretical calculation of distribution network line losses, describes the theoretical calculation of power loss of distribution network components, 110kV and The following are theoretical calculations of distribution network line losses, summary of theoretical distribution network line loss electricity, and calculation methods of theoretical line loss rate. This document is applicable to the theoretical calculation of line losses in distribution networks of 110kV and below. 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. DL/T 686-2018 Guidelines for Calculating Power Losses in Power Grids DL/T 1365-2014 Terminology and Glossary of Electricity Energy Conservation DL/T 5729-2023 Technical Guidelines for Distribution Network Planning and Design 3 Terms and Definitions For the purposes of this document, the terms and definitions defined in DL/T 1365-2014 and DL/T 686-2018 and the following apply. 3.1 distribution network Receives electrical energy from the power source (transmission grid, power generation facilities, etc.) and distributes it to various users locally or step by step through distribution facilities. network. Note. 110kV~35kV power grid is a high-voltage distribution network, 10kV (20kV, 6kV) power grid is a medium-voltage distribution network, and 380V (220V) power grid is a low-voltage distribution network. [Source. DL/T 5729-2023, 2.0.1, with modifications] 3.2 A component of a system or device that cannot be divided into smaller parts without losing its specific function. A group of devices or equipment that needs to be further refined and considered as a whole. Note. Such as a power line, a power transformer, a group of reactors, etc. 3.3 The energy loss in the process of power transmission in the power grid occurs in various links such as transmission, transformation, distribution and consumption. [Source. DL/T 1365-2014, 5.7.1.21, modified] 3.4 According to the parameters of power grid equipment, operation mode, flow distribution and load conditions, apply existing laws, theorems and rules to the power grid and its energy consumption. Calculation of electrical energy losses by components. [Source. DL/T 1365-2014, 5.7.1.23, modified]

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