DL/T 741-2019 English PDFUS$899.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. DL/T 741-2019: Operating code for overhead transmission line Status: Valid DL/T 741: Historical versions
Basic dataStandard ID: DL/T 741-2019 (DL/T741-2019)Description (Translated English): Operating code for overhead transmission line Sector / Industry: Electricity & Power Industry Standard (Recommended) Classification of Chinese Standard: F20 Word Count Estimation: 39,340 Date of Issue: 2019-06-04 Date of Implementation: 2019-10-01 Older Standard (superseded by this standard): DL/T 741-2010 Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019 Issuing agency(ies): National Energy Administration DL/T 741-2019: Operating code for overhead transmission line---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.Operating code for overhead transmission line DL/T 996-2019 ICS 29.240.20 F 23 People's Republic of China Electric Power Industry Standard Replace DL/T 741-2010 Operating Regulations for Overhead Transmission Lines 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...2 4 Basic requirements...3 5 Operating standards...4 6 Tour...7 7 Testing...9 8 Repair...10 9 Operational requirements for special sections...13 10 Operational requirements of line protection zone...17 11 Environmental protection of transmission lines...18 12 Technical Management...20 Appendix A (Informative Appendix) Treatment of Broken Strand Damage of the Ground Wire...24 Appendix B (Normative Appendix) Distance and Crossover of Line Conductor to Ground...26 Appendix C (Normative Appendix) Minimum Air Gap for Lines of Various Voltage Levels...31 Appendix D (informative appendix) Effective coefficient Ke value of creepage distance of different types of insulators...32ForewordThis standard was drafted in accordance with the rules of the national standard GB/T 1.1-2009. Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. Compared with DL/T 741-2010, the main changes of this standard are as follows. --The original standard is applicable to AC 110(66)kV～750kV overhead transmission lines. With the development of transmission voltage levels in my country in recent years, In particular, the DC transmission voltage level is further improved, and the operation and maintenance of AC and DC transmission lines have many common points. Therefore, the scope of this standard is adjusted. It is suitable for AC 110(66)kV and above, DC ±400kV and above overhead transmission lines, 35kV overhead lines and Other overhead transmission lines can be used as reference. --In order to standardize terms, the terms and definitions of the original standard have been expanded to the relevant content of DC transmission lines. --With the promotion and application of helicopter inspections and drone inspections of transmission lines, the relevant content of three-dimensional inspections has been added. Appendix A and Appendix D of this standard are informative appendices, and Appendix B and Appendix C are normative appendices. After the implementation of this standard, it will replace DL/T 741-2010. This standard was proposed by the China Electricity Council. This standard is under the jurisdiction of the National Overhead Line Standardization Technical Committee Line Operation Subcommittee. The main drafting organizations of this standard. China Electric Power Research Institute Co., Ltd., State Grid Co., Ltd., State Grid Hubei Electric Power Co., Ltd. Company, State Grid Jiangxi Electric Power Co., Ltd., State Grid Shandong Electric Power Company, State Grid Zhejiang Electric Power Co., Ltd., State Grid Heilongjiang Electric Power Company State Grid Hunan Electric Power Co., Ltd., Yunnan Power Grid Co., Ltd., State Grid Shanxi Electric Power Company, State Grid Gansu Electric Power Company Division. The main drafters of this standard. Shao Guiwei, Wang Jian, Yi Hui, Ma Jianguo, Cai Huanqing, Zhang Yu, Zheng Lianyong, Jiang Wendong, Li Ziming, Gong Zheng Xiong, Liu Jinghua, Huang Xiuqian, Peng Bo, Zhou Guohua, Niu Biao, Kong Chenhua, Wang Haiyue, Fu Jing, Zhang Lihua, Li Yonglai, Ji Huizheng, Liu Hong Zheng, Yin Hong, Jin Yijiong, Chen Liming. This standard was first issued on February 12,.2001; it was issued for the second time on May 24,.2010, this is the second revision. The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of China Electricity Council (Baiguang, Xicheng District, Beijing) Lu Er Tiao No. 1, 100761). Operating Regulations for Overhead Transmission Lines1 ScopeThis standard specifies the basic requirements and operating standards for the operation of overhead power transmission lines, and provides inspection, inspection, maintenance, and technical Management, etc. put forward specific requirements, and put forward clear regulations on the maintenance of special sections of transmission lines, protected areas, and line environmental protection. This standard is applicable to overhead transmission lines with voltage levels of 110 (66) kV AC, ±400 kV and above (including grounding electrode lines). 35kV overhead lines and other overhead transmission lines can be used as reference.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 2900.51 Electrical terminology overhead line GB/T 4365 EMC terminology GB/T 25094 General technical requirements for emergency repair of overhead transmission lines GB/T 26218.1 Selection and size determination of high-voltage insulators used under polluted conditions Part 1.Definitions, information and general principles GB/T 32673 Technical Guidelines for Inspection of Overhead Transmission Line Faults GB/T 35695 Technical Guidelines for Prevention and Control of Bird-related Faults in Overhead Transmission Lines GB/T 35706 Technical Guidelines for Plotting Distribution Map of Ice Zones in Power Grid GB 50064 Design Code for Overvoltage Protection and Insulation Coordination of AC Electrical Equipment GB 50233 Code for Construction Acceptance of 110kV～750kV Overhead Transmission Lines GB 50545 110kV～750kV design code for overhead transmission lines GB 50665 Design Code for 1000kV Overhead Transmission Line GB 50790 ±800kV DC Overhead Transmission Line Design Code DL/T 288 Technical Guidelines for Helicopter Inspection of Overhead Transmission Lines DL/T 289 Helicopter inspection operation sign for overhead transmission lines DL/T 409 Electric Safety Work Regulations (Part of Power Line) DL/T 626 Inspection Regulations for Deteriorated Suspension Insulators DL/T 627 Room temperature curing silicone rubber anti-pollution flashover coating for insulators DL/T 815 Composite outer metal oxide arrester for AC transmission line DL/T 887 Tower power frequency grounding resistance measurement DL/T 1000.3 Guidelines for the use of insulators for overhead lines with a nominal voltage higher than 1000V Part 3.Rod-type suspension complexes for AC systems Combined insulator DL/T 1069 Guidelines for repairing the ground conductor of overhead transmission lines DL/T 1122 Technical Guidelines for Insulation Configuration of Overhead Transmission Lines DL/T 1248 Overhead transmission line condition inspection guide DL/T 1249 Technical Guidelines for Operation State Evaluation of Overhead Transmission Lines DL/T 1367 Technical Guidelines for Transmission Line Inspection DL/T 1482 Technical Guidelines for UAV Inspection Operation of Overhead Transmission Lines DL/T 1570 Overhead transmission line bird-related fault risk classification and distribution map drawing DL/T 5130 Technical regulations for design of steel pipe poles for overhead transmission lines DL/T 5235 ±800kV and below DC overhead transmission line engineering construction and acceptance regulations DL/T 5300 1000kV Overhead Transmission Line Project Construction Quality Inspection and Evaluation Regulation Order of the President of the People's Republic of China No. 24 "The Electricity Law of the People's Republic of China" April.2015 Order No. 239 of the State Council of the People's Republic of China "Regulations on the Protection of Power Facilities" January.2011 Order No. 10 of the National Development and Reform Commission of the People’s Republic of China "Implementation Rules for the Regulations on the Protection of Electric Power Facilities" June.20113 Terms and definitionsThe following terms and definitions defined in GB/T 2900.51 and GB/T 4365 apply to this document. 3.1 Residential area Densely populated areas such as industrial enterprise areas, ports, docks, railway stations, towns, and villages belong to the public environment. 3.2 Nonresidential area Areas other than the above-mentioned residential areas are all non-residential areas. Although people, vehicles or agricultural machinery often arrive, but there is no house or house The scarce areas are also non-residential areas. 3.3 Residential residences A building where people live for a long time, including rooms or platforms. It also includes hospitals, kindergartens, Schools, office buildings and other buildings where people live or work for a long time. 3.4 Area of minute meteorological phenomena Refers to a local area within a large area. Due to special changes in terrain, location, slope, temperature, humidity, etc., there are differences A more special local meteorological area in a large area that has a serious impact on the safe operation of the line. 3.5 Area of micro-topography It is a small area in a large terrain area. According to the classification of micro-topography, there are mainly passway type, mountain watershed type, and water vapor increase Type, terrain uplift type, canyon air duct type, etc. 3.6 Adverse geological area Areas where there is a risk of geological disasters such as landslides, mudslides, quicksand, ground subsidence, surface cracks or ground subsidence, or due to underground mining operations The area where karma causes or may cause the surface to move and deform. 3.7 Earth electrode line The line connecting the neutral bus of the converter station with the grounding electrode feeder. 3.8 Line inspection In order to grasp the operating status of the line, discover defects or hidden dangers in the line body, auxiliary facilities and line protection Provide basis for road overhaul, maintenance and condition evaluation (assessment), and conduct observation, inspection and recording of the line at close range. According to different According to the needs, line inspections can be divided into three types. normal inspections, fault inspections, and special inspections. 3.9 Regular inspection The inspection of the line in a certain period, including line equipment (referring to line body and auxiliary equipment) and line protection area (line Road channel). 3.10 Fault inspection The operation unit organizes a line inspection to find out the fault point, the cause of the fault and the fault situation. 3.11 Special inspection Under special circumstances or according to special needs, line inspections conducted by special inspection methods. Special inspections include. night inspections, Cross patrols, pole tower inspections, patrols to prevent damage from external forces, etc. 3.12 Important crossing Overhead transmission lines span major railways such as high-speed railways, electrified railways, expressways, first-class highways, and important transmission lines. Facilities, which will cause major personal injury and death, major equipment damage, large-scale blackouts and other major social impacts and safety incidents in the event of failure The road crosses the section. 3.13 Special section The special section of the overhead transmission line refers to the line area that is different from other conventional sections in the line design and operation, and has been specially designed and constructed. segment. Special sections mainly include. large spans, important crossings, mine-prone areas, heavily polluted areas, heavy ice areas, bird-related failure areas, areas prone to damage by external forces, Micro-topography, micro-weather areas, and poor geological areas. 3.14 Large crossing The line crosses navigable rivers, lakes or straits, etc., due to the large span or taller towers, special consideration is required for wire selection or tower design, and When the failure occurs, it will seriously affect the shipping or repair the particularly difficult tensile section. 3.15 Transmission line protected region The wire edge extends horizontally to the outside for a certain distance and is perpendicular to the area in the two parallel planes formed by the ground. 3.16 Electromagnetic environment of transmission line The electric field effect and magnetic field effect produced by the line voltage and current during the operation of the transmission line, and the radio interference produced by the corona effect Disturbance and audible noise. 3.17 Total electric field strength above ground The combined ground field strength of the electrostatic field generated by the electric charge on the wire and the electric field generated by the space charge. 3.18 Ion current density Under the action of the electric field, the space charge continuously moves to the ground, and the current received per unit area of the ground is called the ion current density.4 Basic requirements4.1 The operation of the line should implement the policy of "safety first, prevention first, and comprehensive management", and implement the relevant regulations of DL/T 409.Luck The line maintenance unit should do a good job in the inspection, inspection, maintenance and management of the line, and should actively adopt advanced technology and implement scientific management, and continuously Summarize experience, accumulate information, master the law, and ensure the safe operation of the line. 4.2 The operation and maintenance unit shall participate in route planning, feasibility study, route selection, design review, pole and tower positioning, material and equipment selection The management of the whole production process such as model, bidding, construction acceptance, etc., and put forward requirements and measures based on the characteristics of the region, operating experience and anti-accident measures It is recommended to coordinate design and operation. 4.3 Each line should have clear operation and maintenance management boundaries, and it should be clearly demarcated with power plants, substations, user units and adjacent operation and management units. At the dividing point, there should be no blank spots. 4.4 The operation and maintenance unit should establish a sound post responsibility system, and the operation and management personnel should master the equipment status and maintenance technology, and be familiar with relevant regulations System, frequently analyze the operation of the line, propose and implement measures to prevent accidents and improve the level of safe operation. If an accident occurs, it should be The relevant provisions of the investigation of safety accidents are carried out. 4.5 The operation and maintenance unit shall improve the responsibility system for important cross-operation and maintenance guarantee. 4.6 Operation and maintenance units shall strictly abide by the implementation of the "Electric Power Law of the People's Republic of China", "Regulations on the Protection of Power Facilities", and "Power Facilities Implementation Rules of the Protection Regulations" and other relevant laws and regulations, carry out publicity and education of power facilities protection and mass protection of lines, establish and improve power facilities Implement protection work mechanisms and accountability systems, strengthen line protection area management, and prevent external damage. 4.7 Operation and maintenance units should strengthen communication with relevant government departments such as agriculture and forestry, public security, and safety supervision, and establish relations with railway, highway, shipping and other units. Coordination mechanism to ensure the safe and stable operation of transmission lines. 4.8 For newly built and rebuilt lines, acceptance and transfer shall be carried out in accordance with relevant standards and regulations such as GB 50233. 4.9 The operation and maintenance unit shall, based on the operation experience and the relevant requirements of DL/T 1249 and DL/T 1248, on the basis of line status analysis and evaluation On the basis of this, carry out the maintenance of line status. 4.10 New-type towers, wires, fittings, insulators and tools shall be used after passing the test. 4.11 The configuration of the external insulation of the line shall be in accordance with the requirements of relevant standards such as GB 50064, combined with operating experience, and comprehensive consideration of pollution prevention, lightning protection, and protection. Wind deviation, anti-icing and other factors. 4.12 The operation and maintenance unit shall carry out minefields, polluted areas, ice areas, and bird-related faults in accordance with relevant standards such as GB/T 35706 and DL/T 1570. The risk distribution map is drawn and updated regularly to provide guidance for the operation of special sections. 4.13 For transmission lines in special sections such as areas prone to external damage, bird-related failure areas, micro-weather areas, micro-topography areas, and poor geological areas, Inspections should be strengthened and targeted technical measures should be taken. 4.14 There should be line name, tower number, phase, and necessary safety and protection signs on the poles of the line. Double-circuit and multi-circuit lines on the same tower There should be eye-catching signs. 4.15 During operation, the maintenance of auxiliary facilities such as bird prevention devices, signs, warning signs and related monitoring devices should be strengthened to ensure that they are intact.5 Operating standards5.1 Tower and foundation 5.1.1 The cement on the surface of the foundation should not fall off, the steel bars should not be exposed, the prefabricated and plug-in foundations should not be corroded, and the soil around the foundation should be protected It should not be lost or collapsed; the foundation retaining wall or slope protection should not have cracks, subsidence or deformation; the foundation drainage ditch should not be blocked, landfilled or silted; The protection measures for the grounding body of the high and low leg foundation should not be invalid; the anticorrosive insulation treatment of the insulation foundation of the UHV DC overhead grounding electrode line should meet the design Requirements. The protection distance of the foundation slope should meet the requirements of standards such as GB 50545. 5.1.2 There should be no water seepage at the contact between the main material of the tower leg and the protective cap, and the protective cap or the top surface of the foundation should have a slope of scattered water; no stacking around the tower legs Corrosive, flammable and other items; anti-corrosion measures should be taken for the main materials of tower legs in severely polluted areas. 5.1.3 The poles and towers in permafrost areas are equipped with the foundations of hot rods. The inclination of the hot rods should not be greater than 30º. The fins should be gnawed, squeezed, and fallen, and there should be no dirt, sand, oil, wood chips, hanging foreign objects, etc. between the fins. 5.1.4 The inclination of the poles and towers of the AC line, the deflection of the pole (tower) top, and the skew degree of the cross arm shall not exceed the requirements in Table 1. 5.1.6 The tensile to......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of DL/T 741-2019_English be delivered?Answer: Upon your order, we will start to translate DL/T 741-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of DL/T 741-2019_English with my colleagues?Answer: Yes. 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