This specification is applicable to the design of 66kV and below AC overhead power lines (hereinafter referred to as overhead power lines). GB 50061-1997 66kV and below overhead power line design specification GB50061-1997 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
GB50061-97
Code for design of 66kV or under over-headelectrical power transmissionlineConstruction Standard
1997-11-12Release
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full Text Information System
1998-06-01
Jointly Issued
Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Code for design of 66kV or under over-headelectrical power transmissionline lineGB
50061-97
Editor department: Ministry of Electric Power Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: June 1, 1998
1998Beijing
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the release of the national standard "66kV and below overhead power line design specification"
Construction Standard [1997] No. 329
According to the requirements of the State Planning Commission's Document No. 290 [1991], the "66kV and below overhead power line design specification" jointly revised by the Ministry of Electric Power Industry and relevant departments has been reviewed by relevant departments. The "66kV and below overhead power line design specification" GB50061-97 is now approved as a mandatory national standard and will be implemented on June 1, 1998. The former national standard "Industrial and Civil 35kV and below Overhead Power Line Design Code" GBJ61-83 is abolished at the same time.
This code is managed by the Ministry of Electric Power Industry, and the specific interpretation and other work is undertaken by Liaoning Electric Power Survey and Design Institute, and the publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
November 12, 1997
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
This code is revised from the former national standard "Industrial and Civil 35kV and below Overhead Power Line Design Code" (GBJ61-83) according to the notice of the State Planning Commission [1991] No. 290 and the former Ministry of Energy Electric Power Planning and Design Administration [1992] No. 13.
This code is divided into 12 chapters and 2 appendices. The main contents of this revision are: expanding the applicable voltage level of the specification to 66kV and below; adding relevant contents of insulation coordination, lightning protection and grounding chapters; replacing "typical meteorological zones" with clear provisions for line design meteorological conditions and temperature, icing and wind speed under various working conditions; adjusting the relevant contents of path selection and cross-over; adding relevant provisions for insulated conductors of overhead power lines of 10kV and below; replacing the allowable stress design method and safety factor design method with the probabilistic limit state design method for tower structure design.
In order to further improve the level of the specification, it is hoped that all units will pay attention to accumulating information and summarizing experience in the process of implementing this specification. If any modification or supplement is found, please send your opinions and relevant materials to Liaoning Electric Power Survey and Design Institute (No. 65, Nanta Street, Shenyang, Postal Code: 110015) for reference in future revisions. The main editor of this specification: Liaoning Electric Power Survey and Design Institute. Participating units: Beijing Power Supply Bureau, Shenyang Electric Power Bureau. List of main drafters: Shou Zhuchang, Chen Weici, Liang Kezhong, Bao Xinghui, Xu Baoyi, Zhang Yi, Huang Lianzhuang.
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Weather conditions
Conductors, ground wires, insulators and hardware…
General provisions·
4.2 Wireline design
4.3 Insulators and hardware
Insulation coordination, lightning protection and grounding
Tower types·
Tower loads and materials
7.1 Loads
7.2 Materials
Basic provisions for tower design
Tower structure·
General provisions
9 .2 Structural requirements
Foundation·
Positioning of poles and towers, distance to the ground and cross-over auxiliary facilities
Appendix A Weak current line level·
Appendix B
Environmental pollution level of overhead power lines
Explanation of standard terms and phrases
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Engineering construction standard full text information system
1.0.1 This specification is formulated to ensure that the design of 66kV and below overhead power lines is safe and reliable, technologically advanced, economically reasonable, and convenient for construction and maintenance. 1.0.2 This specification is applicable to the design of 66kV and below AC overhead power lines (hereinafter referred to as overhead power lines).
3 The design of overhead power lines must conscientiously implement the national technical and economic policies, comply with development plans, and actively and prudently adopt new technologies, new materials, new equipment, new processes and new structures.
1.0.4 The pole tower structure design of overhead power lines shall adopt the limit state design method based on probability theory.
1.0.5 In addition to complying with this specification, the design of overhead power lines shall also comply with the provisions of relevant national standards and specifications.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.0.1 The selection of the path of overhead power lines shall be carefully investigated and studied, and factors such as operation, construction, traffic conditions and path length shall be comprehensively considered. A comprehensive plan shall be made and multiple plans shall be compared to ensure economic rationality, safety and applicability. 2.0.2 The path of urban overhead power lines shall be combined with the overall urban planning. The location of the line path corridor shall be arranged in a unified manner with various pipelines and other municipal facilities. 2.0.3 The selection of the path of overhead power lines shall meet the following requirements: 1 The intersection with other facilities shall be reduced. When intersecting with other overhead lines, the intersection point shall not be selected on the top of the pole tower of the crossed line. 2 The crossing angle of overhead power lines crossing overhead weak current lines shall comply with the requirements of Table 2.0.3.
Weak current line level
Crossing angle
Crossing angle between overhead power lines and overhead weak current lines Level 1
≥45°
Note: The classification of overhead weak current lines shall comply with the provisions of Appendix A of this Code. Level 3
Unrestricted
Overhead power lines of 33kV and above shall not cross warehouse areas where flammable and explosive materials are stored. The fire protection distance between overhead power lines and fire-hazardous production plants and warehouses, flammable and explosive material yards, and flammable or flammable and explosive liquid (gas) storage tanks shall comply with the provisions of the current national standard "Code for Fire Protection Design of Buildings" (GBJ16-87). 4 It should avoid depressions, scour areas, poor geological areas, virgin forest areas and other areas that affect the safe operation of the line. 5 It is not advisable to cross houses.
2.0.4 When overhead power lines pass through forest areas, a channel should be cut down. The channel width of overhead power lines of 10kV and below should not be less than 5m extending outward on both sides of the line. The channel width of 35kV and Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
66kV lines should not be less than the growth height of the main tree species in the forest area extending outward on both sides of the line. Individual trees near the channel that exceed the natural growth height of the main tree species should be cut down. If the natural growth height of the trees does not exceed 2m or the vertical distance between the conductor and the tree (considering the natural growth height) shall comply with the provisions of Table 11.0.11 of this specification, the channel may not be cut down without affecting the construction and operation of the line. 2.0.5 When overhead power lines pass through fruit forests, economic crop forests and urban greening shrub forests, the channel should not be cut down.
3 The length of the tension section should comply with the following provisions: the length of the tension section of 135kV and 66kV lines should not be greater than 5km; the length of the tension section of 210kV and below lines should not be greater than 2km. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3Weather Conditions
3.0.1 The design temperature of overhead power lines shall be determined according to the statistical values ​​in the local meteorological records for 10-20 years. The maximum temperature should be +40℃. Under the conditions of maximum temperature, minimum temperature and annual average temperature, it should be calculated as windless and ice-free.
The annual average temperature used in the design of overhead power lines shall be determined according to the following methods: 1 When the annual average temperature of the area is between 3 and 17℃, the annual average temperature shall be taken as a multiple of 5 adjacent to this number;
2 When the annual average temperature of the area is less than 3℃ or greater than 17℃, the annual average temperature shall be reduced by 3 to 5℃ and then taken as a multiple of 5 adjacent to this number. 3.0.3 The ice thickness of the conductor or ground wire used in the design of overhead power lines can be 5mm, 10mm, 15mm or 20mm based on the investigation. The density of ice shall be 0.9g/cm; the temperature when iced shall be -5℃. The wind speed when iced shall be 10m/s. 3.0.4 The wind speed for installation conditions shall be 10m/s, and there shall be no ice. The air temperature may be adopted according to the following provisions:
1 In areas where the minimum temperature is -40℃, -15℃ shall be adopted; 2 In areas where the minimum temperature is -20℃, -10℃ shall be adopted; 3 In areas where the minimum temperature is -10℃, -5℃ shall be adopted; 4 In areas where the minimum temperature is -5℃ or above, 0℃ shall be adopted. 3.0.5 The air temperature for lightning overvoltage conditions may be 15℃, and the wind speed may be 10m/s; when checking the distance between the conductor and the ground wire, the wind speed shall be 0m/s, and there shall be no ice. 3.0.6 The air temperature for internal overvoltage conditions may be the annual average temperature, and the wind speed may be 50% of the maximum design wind speed, but should not be lower than 15m/s, and there shall be no ice. 3.0.7 Under the maximum wind speed condition, the calculation shall be based on ice-free, and the temperature may be adopted according to the following provisions: Engineering 4 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
In areas where the minimum temperature is -10℃ or below, -5℃ shall be adopted; 1
2 In areas where the minimum temperature is -5℃ or above, +10℃ shall be adopted. 3.0.8
3 The wind speed of live working conditions may be 10m/s, the temperature may be 15℃, and there shall be no ice.
The wind speed of long-term load conditions shall be 5m/s, the temperature shall be the annual average temperature, and there shall be no ice.
3.0.10 The maximum design wind speed shall be the average maximum wind speed of 10 minutes obtained from statistics at a height of 10m above the ground in the local open and flat ground once in 15 years; when there is no reliable data, the maximum design wind speed shall not be less than 25m/s.
The maximum design wind speed of overhead power lines in mountainous areas shall be determined based on local meteorological data; when there is no reliable data, the maximum design wind speed may be increased by 10% based on the wind speed on nearby flat land, and shall not be less than 25m/s.
When overhead power lines pass through urban areas or forests, if the average height of shielding on both sides is greater than 2/3 of the tower height, the maximum design wind speed shall be reduced by 20% compared with the local maximum design wind speed.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4 Conductors, Ground Wires, Insulators and Hardware
4.1 General Provisions
1 Conductors of overhead power lines may be steel core aluminum stranded wire or aluminum stranded wire. Ground wire 4.1.1
Galvanized steel stranded wire may be used.
2 For overhead power lines of 10kV and below in urban areas, insulated 4.1.2
aluminum stranded wires may be used in the following situations:
1 The line corridor is narrow and the distance between the line and the building cannot meet the safety requirements;
The area adjacent to high-rise buildings;
Busy streets or densely populated areas;
Tourist areas and green areas;
The area with serious air pollution;
Construction sites.
The type of conductor shall be determined comprehensively based on the planning and design of the power system, the plan task book and the technical conditions of the project.
The type of ground wire shall be determined based on the requirements of lightning protection design and engineering technical conditions. 4.1.4
4.2 Wire design
The tension sag calculation of the conductor shall use the maximum use tension and average operating tension as the control conditions under various meteorological conditions. The tension sag calculation of the ground wire may use the maximum use tension, average operating tension and the distance between the conductor and the ground wire as the control conditions.
Note: The average operating tension is the tension of the conductor or ground wire under the annual average temperature condition. 2 The distance between the conductor and the ground wire in the center of the span shall meet the following requirements: 4.2.2
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Engineering Construction Standard Full Text Information System
S≥0.012L+1
S-the distance between the conductor and the ground wire in the center of the span (m); where
L——span (m).
3 The maximum operating tension of the conductor or ground wire shall not be greater than 40% of the instantaneous breaking tension of the stranded wire 4.2.3
.
4.2.4 The upper limit of the average operating tension of the conductor or ground wire and the anti-vibration measures shall meet the requirements of Table 4.2.4.
Span and environmental conditions
Average operating tension limit of conductor or ground wire and anti-vibration measuresAverage operating tension limit (percentage of instantaneous
destructive tension) (%)
Aluminum stranded steel wire
Span in open areas <500m
Span in non-open areas <500m
Span <120m
Regardless of span
Regardless of span||tt ||Galvanized steel strand
Anti-vibration measures
Not required
Not required
Not required
Bar guard
Anti-vibration hammer (wire) or
Additional bar guard
The initial elongation of the conductor or ground wire of 535kV and 66kV overhead power lines should be determined by test. The effect of the initial elongation of the conductor or ground wire on the sag can be compensated by the temperature reduction method. When there is no test data, the initial elongation and the reduced temperature can use the values ​​listed in Table 4.2.5.
Aluminum stranded steel wire
Galvanized steel stranded wire
Initial elongation and reduced temperature of conductor or ground wire
3×104~5×104
1×10-
Reduced temperature (℃)
Note: Aluminum stranded steel wire with a small aluminum-to-steel ratio should use the lower limit value in the table, and aluminum stranded steel wire with a large aluminum-to-steel ratio should use the upper limit value in the table.
The influence of the initial elongation of the conductor on the sag of overhead power lines of 310kV and below, 4.2.6
Engineering Construction Standard Full Text Information System10 The maximum design wind speed shall be the average maximum wind speed of 10 minutes in 15 years at a height of 10m above the ground on the local open and flat ground; when there is no reliable data, the maximum design wind speed shall not be less than 25m/s.
The maximum design wind speed of overhead power lines in mountainous areas shall be determined based on local meteorological data; when there is no reliable data, the maximum design wind speed may be increased by 10% according to the wind speed on the nearby flat ground, and shall not be less than 25m/s.
When overhead power lines pass through urban areas or forests, if the average height of the shielding on both sides is greater than 2/3 of the tower height, the maximum design wind speed shall be reduced by 20% compared with the local maximum design wind speed.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4 Conductors, ground wires, insulators and hardware
4.1 General provisions
1 The conductors of overhead power lines may be steel core aluminum stranded wires or aluminum stranded wires. Ground wire 4.1.1
Galvanized steel stranded wire can be used.
2Insulated 4.1.2
aluminum stranded wire can be used in the following situations for overhead power lines of 10kV and below in urban areas:
1Locations where the line corridor is narrow and the distance between the line and the building cannot meet the safety requirements;
Locations adjacent to high-rise buildings; bzxZ.net
Busy streets or densely populated areas;
Tourist areas and green areas;
Locations with serious air pollution;
Construction sites.
The model of the conductor should be determined comprehensively based on the planning and design of the power system, the plan task book and the technical conditions of the project.
The model of the ground wire should be determined based on the requirements of the lightning protection design and the technical conditions of the project. 4.1.4
4.2 Overhead line design
For the calculation of the tension sag of the conductor, the maximum use tension and the average operating tension should be used as the control conditions under various meteorological conditions. The calculation of the tension arc weight of the ground wire can use the maximum use tension, average operating tension and the distance between the conductor and the ground wire as control conditions.
Note: The average operating tension is the tension of the conductor or ground wire under the annual average temperature condition. 2 The distance between the conductor and the ground wire in the center of the span shall meet the following requirements: 4.2.2
Type 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
S≥0.012L+1
S-the distance between the conductor and the ground wire in the center of the span (m); where
L——span (m).
3 The maximum use tension of the conductor or ground wire shall not be greater than 40% of the instantaneous breaking tension of the stranded wire 4.2.3
.
4.2.4 The upper limit of the average operating tension of the conductor or ground wire and the anti-vibration measures shall meet the requirements of Table 4.2.4.
Span and environmental conditions
Average operating tension limit of conductor or ground wire and anti-vibration measuresAverage operating tension limit (percentage of instantaneous
destructive tension) (%)
Aluminum stranded steel wire
Span in open areas <500m
Span in non-open areas <500m
Span <120m
Regardless of span
Regardless of span||tt ||Galvanized steel strand
Anti-vibration measures
Not required
Not required
Not required
Bar guard
Anti-vibration hammer (wire) or
Additional bar guard
The initial elongation of the conductor or ground wire of 535kV and 66kV overhead power lines should be determined by test. The effect of the initial elongation of the conductor or ground wire on the sag can be compensated by the temperature reduction method. When there is no test data, the initial elongation and the reduced temperature can use the values ​​listed in Table 4.2.5.
Aluminum stranded steel wire
Galvanized steel stranded wire
Initial elongation and reduced temperature of conductor or ground wire
3×104~5×104
1×10-
Reduced temperature (℃)
Note: Aluminum stranded steel wire with a small aluminum-to-steel ratio should use the lower limit value in the table, and aluminum stranded steel wire with a large aluminum-to-steel ratio should use the upper limit value in the table.
The influence of the initial elongation of the conductor on the sag of overhead power lines of 310kV and below, 4.2.6
Engineering Construction Standard Full Text Information System10 The maximum design wind speed shall be the average maximum wind speed of 10 minutes in 15 years at a height of 10m above the ground on the local open and flat ground; when there is no reliable data, the maximum design wind speed shall not be less than 25m/s.
The maximum design wind speed of overhead power lines in mountainous areas shall be determined based on local meteorological data; when there is no reliable data, the maximum design wind speed may be increased by 10% according to the wind speed on the nearby flat ground, and shall not be less than 25m/s.
When overhead power lines pass through urban areas or forests, if the average height of the shielding on both sides is greater than 2/3 of the tower height, the maximum design wind speed shall be reduced by 20% compared with the local maximum design wind speed.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4 Conductors, ground wires, insulators and hardware
4.1 General provisions
1 The conductors of overhead power lines may be steel core aluminum stranded wires or aluminum stranded wires. Ground wire 4.1.1
Galvanized steel stranded wire can be used.
2Insulated 4.1.2
aluminum stranded wire can be used in the following situations for overhead power lines of 10kV and below in urban areas:
1Locations where the line corridor is narrow and the distance between the line and the building cannot meet the safety requirements;
Locations adjacent to high-rise buildings;
Busy streets or densely populated areas;
Tourist areas and green areas;
Locations with serious air pollution;
Construction sites.
The model of the conductor should be determined comprehensively based on the planning and design of the power system, the plan task book and the technical conditions of the project.
The model of the ground wire should be determined based on the requirements of the lightning protection design and the technical conditions of the project. 4.1.4
4.2 Overhead line design
For the calculation of the tension sag of the conductor, the maximum use tension and the average operating tension should be used as the control conditions under various meteorological conditions. The calculation of the tension arc weight of the ground wire can use the maximum use tension, average operating tension and the distance between the conductor and the ground wire as control conditions.
Note: The average operating tension is the tension of the conductor or ground wire under the annual average temperature condition. 2 The distance between the conductor and the ground wire in the center of the span shall meet the following requirements: 4.2.2
Type 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
S≥0.012L+1
S-the distance between the conductor and the ground wire in the center of the span (m); where
L——span (m).
3 The maximum use tension of the conductor or ground wire shall not be greater than 40% of the instantaneous breaking tension of the stranded wire 4.2.3
.
4.2.4 The upper limit of the average operating tension of the conductor or ground wire and the anti-vibration measures shall meet the requirements of Table 4.2.4.
Span and environmental conditions
Average operating tension limit of conductor or ground wire and anti-vibration measuresAverage operating tension limit (percentage of instantaneous
destructive tension) (%)
Aluminum stranded steel wire
Span in open areas <500m
Span in non-open areas <500m
Span <120m
Regardless of span
Regardless of span||tt ||Galvanized steel strand
Anti-vibration measures
Not required
Not required
Not required
Bar guard
Anti-vibration hammer (wire) or
Additional bar guard
The initial elongation of the conductor or ground wire of 535kV and 66kV overhead power lines should be determined by test. The effect of the initial elongation of the conductor or ground wire on the sag can be compensated by the temperature reduction method. When there is no test data, the initial elongation and the reduced temperature can use the values ​​listed in Table 4.2.5.
Aluminum stranded steel wire
Galvanized steel stranded wire
Initial elongation and reduced temperature of conductor or ground wire
3×104~5×104
1×10-
Reduced temperature (℃)
Note: Aluminum stranded steel wire with a small aluminum-to-steel ratio should use the lower limit value in the table, and aluminum stranded steel wire with a large aluminum-to-steel ratio should use the upper limit value in the table.
The influence of the initial elongation of the conductor on the sag of overhead power lines of 310kV and below, 4.2.6
Engineering Construction Standard Full Text Information System
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