GB/T 37047-2022 English PDFUS$349.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 37047-2022: Cloud-to-ground lightning density based on lightning location systems(LLS) - General principles Status: Valid GB/T 37047: Historical versions
Basic dataStandard ID: GB/T 37047-2022 (GB/T37047-2022)Description (Translated English): Cloud-to-ground lightning density based on lightning location systems(LLS) - General principles Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K04 Word Count Estimation: 18,151 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 37047-2022: Cloud-to-ground lightning density based on lightning location systems(LLS) - General principles---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. Cloud-to-ground lightning density based on lightning location systems(LLS) - General principles ICS 91.120.40 CCSK04 National Standards of People's Republic of China Replacing GB/T 37047-2018 Based on Lightning Location System (LLS) General rule of ground flash density Published on 2022-07-11 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms, Definitions, Abbreviations and Symbols 1 3.1 Terms and Definitions 1 3.2 Abbreviations and symbols 2 4 Requirements 2 4.1 Requirements for LLS2 4.2 Ground lightning density (NG) and lightning strike point density (NSG) 3 4.3 Earth Flash Return 3 4.4 Observation period4 4.5 Observation area 4 4.6 Grid cell size 4 4.7 Boundary effect correction 4 5 Verification of LLS operating characteristics 4 Appendix A (normative) Calculation process of ground flash density (NG) and lightning strike density (NSG) based on LLS data6 Appendix B (informative) Interpretation and calculation method of ground lightning strike point (GSP) 7 Reference 9 forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document replaces GB/T 37047-2018 "General Principles of Ground Lightning Density Based on Lightning Location System (LLS)", and GB/T 37047- Compared with.2018, the main technical changes except for structural adjustment and editorial changes are as follows. --- Deleted the terms "ground flash", "cloud flash", "return", "first strike", "subsequent strikes" and "number of strikes" (see 3.1.1 of the.2018 edition~ 3.1.6); --- Changed the definition of the term "lightning location system" (see 3.1.4, 3.1.10 of the.2018 edition); --- Added the abbreviation "GSP. Lightning Strike Point" (see 3.2); --- Increase the calculation formula of ground flash density (NG) and lightning strike point density (NSG) (see 4.2); --- Deleted the method for determining the lightning strike point density (NG) (see 4.7 of the.2018 edition); --- Added Normative Appendix A "Calculation Process of Ground Lightning Density (NG) and Lightning Strike Point Density (NSG) Based on LLS Data". This document is revised and adopted IEC 62858.2019 "General Principles of Lightning Locating System (LLS)-based Ground Lightning Density". This document is related to Compared with IEC 62858.2019, the following structural adjustments have been made. --- Added 4.2 "Ground Lightning Density (NG) and Lightning Point Density (NSG)", 4.3~4.7 correspond to 4.2~4.6 of IEC 62858.2019; --- Deleted the informative Appendix A of IEC 62858.2019 "Calculation of Ground Lightning Density when Using Satellite Lightning Monitoring Data", and added Added Normative Appendix A "Calculation Process of Ground Lightning Density (NG) and Lightning Strike Point Density (NSG) Based on LLS Data". The technical differences between this document and IEC 62858.2019 and their reasons are as follows. --- Replaced IEC 62305-1 (see 3.1) with the normatively cited GB/T 21714.1 to adapt to the technical conditions of our country; --- Replaced IEC 62305-2 (see 3.1) with the normatively cited GB/T 21714.2 to adapt to the technical conditions of our country; --- Changed the definition of "return detection efficiency" (see 3.1.7), and added the term "ground lightning detection efficiency" (see 3.1.8), so that two are better differentiated; --- Added the calculation formulas of ground flash density (NG) and lightning strike point density (NSG) (see 4.2) to facilitate the understanding and use of this document; --- Changed part of the description of the minimum observation period (see 4.4) to make the requirements clearer and easier to operate; --- Added the method of using lightning strike cases to verify the LLS operating characteristics [see e) in Chapter 5], so as to combine the actual situation in our country, develop Demonstrate the operational performance verification of the lightning location system; --- Added Normative Appendix A "Calculation Process of Ground Lightning Density (NG) and Lightning Strike Point Density (NSG) Based on LLS Data". The following editorial changes have been made to this document. --- Changed the English of the standard name, the term "ground flash density" in 3.1.1 and 3.2; --- Changed the English of the abbreviation "IC. Cloud Flash" in 3.2; --- Deleted some declarative statements in 4.1; --- The title of 4.4 is changed from "Minimum Observation Period" to "Observation Period" to conform to Chinese language habits; --- Added examples in 4.4 to facilitate the understanding of "observation years"; ---In b) of Chapter 5, a note on detection efficiency has been added to facilitate understanding in the text; --- Changed the content of informative Appendix B, and explained in detail the two types of calculation methods for the lightning strike point (GSP); --- Added some references. Please note that some content of this document may involve patents, and the issuing authority of this document does not assume responsibility for identifying patents. This document is proposed and managed by the National Lightning Protection Standardization Technical Committee (SAC/TC258). This document is drafted by. State Grid Electric Power Research Institute Wuhan Nanrui Co., Ltd., Sichuan Zhongguang Lightning Protection Technology Co., Ltd., State Grid Beijing Electric Power Company Electric Power Research Institute, China Railway Research Institute Group Co., Ltd. Communication Signal Research Institute, Guangxi Zhuang Autonomous Region District Lightning Protection Center, Taizhou Guilong Lightning Protection Engineering Co., Ltd., Chongqing Lightning Protection Center, Fujian Meteorological Disaster Defense Technology Center, Army Engineering University Field Engineering College, Guizhou Provincial Meteorological Disaster Prevention Technology Center, Nanjing Kuanyong Electronic System Co., Ltd., Hefei Aerospace Electrical Physics Technology Co., Ltd., China Standardization Association, Zhongke Skyline Technology Co., Ltd. The main drafters of this document. Gu Shanqiang, Wang Yu, Yao Ximei, Yang Guohua, Zhou Kai, Hao Yinbo, Xiao Tong, Liu Ze, Zhi Yaoling, Xu Wei, Zeng Jinquan, Qiu Shi, Ding Min, Li Congying, Duan Zemin, Zhang Jianpei, He Jing, Gao Panliang, Tao Linghong, Wu Jiankang. The previous versions of this document and its superseded documents are as follows. ---First released in.2018 as GB/T 37047-2018; ---This is the first revision.IntroductionLightning protection standards (such as GB/T 21714.2) provide methods for lightning risk assessment of buildings (structures). Ground lightning density (NG) and lightning strike point density (NSG) are the primary input parameters for lightning risk assessment. According to the characteristics of the ground flash, the lightning strike point The density is greater than or equal to the ground flash density. In areas where lightning strike points are available, lightning strike density should be used for lightning risk assessment. At present, this parameter is mainly obtained from the data provided by the Lightning Location System (LLS). There is no one general guideline. Based on Lightning Location System (LLS) General rule of ground flash density1 ScopeThis document specifies the method for obtaining the ground lightning density (NG) and the lightning strike point density (NSG) from the Lightning Location System (LLS). This document applies to the determination of parameters related to lightning risk assessment.2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 21714.1 Lightning Protection Part 1.General (GB/T 21714.1-2015, IEC 62305-1..2010, IDT) GB/T 21714.2 Lightning Protection Part 2.Risk Management (GB/T 21714.2-2015, IEC 62305-2.2010, IDT) 3 Terms, Definitions, Abbreviations and Symbols 3.1 Terms and Definitions The terms and definitions defined in GB/T 21714.1 and GB/T 21714.2 and the following terms and definitions apply to this document. 3.1.1 NG Average number of ground flashes per unit area and unit time. Note. The unit is times per square kilometer year [times/(km2·a)]. 3.1.2 groundstrike-pointdensity NSG Average number of lightning strikes per unit area and unit time. Note. The unit is units per square kilometer-year [units/(km2·a)]. 3.1.3 Lightning sensor lightningsensor A device for measuring electromagnetic radiation signals produced by lightning discharges. Note. referred to as sensor. 3.1.4 Lightning Location System By detecting the electromagnetic radiation signal generated in the process of lightning discharge, a variety of lightning location technologies and methods are used to determine the occurrence of lightning. A system of lightning parameters such as time, location, and polarity. Note. It consists of multiple lightning sensors (also known as sub-stations), data processing and system monitoring centers (also known as central stations) located in different geographical locations, product output and display ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 37047-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 37047-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 37047-2022?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 37047-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
