CN111090919B - Optimal modeling method and system for spacer in three-dimensional design of transformer substation - Google Patents
Optimal modeling method and system for spacer in three-dimensional design of transformer substation Download PDFInfo
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- CN111090919B CN111090919B CN201811244780.9A CN201811244780A CN111090919B CN 111090919 B CN111090919 B CN 111090919B CN 201811244780 A CN201811244780 A CN 201811244780A CN 111090919 B CN111090919 B CN 111090919B
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- 125000006850 spacer group Chemical group 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000013461 design Methods 0.000 title claims abstract description 27
- 239000004020 conductor Substances 0.000 claims abstract description 74
- 238000005457 optimization Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 abstract description 7
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000016507 interphase Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
An optimization modeling method of a spacer in three-dimensional design of a transformer substation determines midpoints of a starting point and a finishing point connecting line according to starting point coordinates and finishing point coordinates of wire connection and wire outgoing directions of the wire connection; calculating sag information of the connecting wires, and adjusting midpoints of the starting and ending wires to obtain final sag points of the wires; obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification; constructing a curve according to the starting point coordinates, the vertical point coordinates, the end point coordinates and the wire outgoing direction of the wire connection, and taking the curve as the central line of the connecting wire; and constructing an optimized model of the split conductor and the spacer according to the conductor center line. According to the invention, through an innovative calculation and simulation method, the real simulation and display problems of split conductors and spacer models thereof in the transformer substation are solved, and the engineering is optimally designed, so that the models are more accurate.
Description
Technical Field
The invention relates to the field of transformer substation engineering construction design, in particular to an optimization modeling method and system for a spacer in a three-dimensional design of a transformer substation.
Background
Along with the promotion of intelligent construction of a national power grid, the achievement of a digital three-dimensional transformer substation becomes particularly important, and at present, three-dimensional design of the transformer substation can be carried out by a plurality of domestic software platforms, but the quality of the design achievement is low, and three-dimensional real modeling of split conductors cannot be realized.
In the engineering construction design of a transformer substation, the problem of conductor galloping of a power transmission line is always a great hidden danger threatening the safety of a power grid. In the last 30 th century, the United states reported that wire icing was galloping, and the earliest country found that wire icing was galloping. Wire galloping has also been reported in Canadian, UK, japan, china, and other countries and regions. The lead galloping is recorded and studied only after the lead galloping with large amplitude (the amplitude reaches about 10 m) which occurs from the Zhongshan mouth to the large crossing lead in China. The high dancing time can cause great mechanical burden on the tower line system, which seriously threatens the safety of the power grid. It can be said that the safe operation of the power grid is seriously threatened by the conductor galloping of the power transmission line, and the treatment of the conductor galloping problem is indistinct.
The phase-to-phase spacer is a very common anti-galloping means at present, is an insulating mechanical component arranged between two phase conductors of an overhead transmission line, has earlier application in the aspect of the transmission line, and can be simultaneously applied to single conductors and split conductors. At present, the phase-to-phase spacer is widely applied to power transmission lines of 220kV and below, and plays an important role in preventing the lines from galloping. The main working principle of the inter-phase spacer for preventing the conductor from waving is to associate the conductors with multiple phases in isolation together to form an integral elastic structure which can bear the tension and compression load at the same time. When adjacent wires do not synchronously dance, the inter-phase spacing bars can block the motion of the dance wires by means of the other phase wires, so that the motion of the wires is damped; meanwhile, the inter-phase spacing bars associate the multi-phase isolated wires into a whole, so that the external excitation action of a wire system is more dispersed, the vibration amplitude of a single wire is effectively reduced, the vibration of the multi-phase wires tends to be synchronous, the inter-phase spacing of the wires is always kept in a larger range, and the occurrence of inter-phase flashover can be effectively avoided.
Because the three-dimensional design software platform of the existing transformer substation and the transmission line thereof cannot realize the three-dimensional real modeling of the split conductor with high quality, the data are incorrect in the aspects of safety clear distance verification, collision inspection, material statistics, conductor simulation, spacer position and the like of the transmission line engineering, the three-dimensional achievement of the engineering cannot be optimally utilized, and the current research on a method for realizing the real modeling of the split conductor and the spacer is urgent.
Disclosure of Invention
Aiming at the defects or shortcomings in the prior art, the invention provides an optimization modeling method of a spacer in three-dimensional design of a transformer substation, which is characterized by comprising the following steps:
step 1: loading a three-dimensional design scene of the transmission line of the transformer substation;
step 2: determining a starting point connecting piece and a finishing point connecting piece for connecting the wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of the connecting wires according to the starting point connecting piece and the finishing point connecting piece;
step 3: calculating the outgoing line direction of the wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
step 4: determining the midpoints of a starting point and a finishing point connecting line according to the starting point coordinates and the finishing point coordinates of the wire connection and the wire outlet direction of the wire connection;
step 5: calculating sag information of the connecting wires, and adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires;
step 6: obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
step 7: and constructing a curve according to the starting point coordinate, the vertical point coordinate, the end point coordinate and the wire outgoing direction of the wire connection, and taking the curve as the central line of the connecting wire.
Step 8: and constructing an optimized model of the split conductor and the spacer according to the conductor center line.
And an optimization modeling system of a spacer in three-dimensional design of a transformer substation, which is characterized in that:
a loading unit: the method is used for loading three-dimensional scenes of the transmission line of the transformer substation;
a determination unit: the method comprises the steps of determining a starting point connecting piece and a finishing point connecting piece for connecting wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of connecting wires according to the starting point connecting piece and the finishing point connecting piece;
an outgoing line determining unit: the method comprises the steps of calculating the outgoing line direction of wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
midpoint determination unit: the method comprises the steps of determining the midpoint of a starting point and ending point connecting line according to the starting point coordinates and ending point coordinates of wire connection and the wire outgoing direction of the wire connection;
a vertical point determining unit: the method comprises the steps of calculating sag information of a connecting wire, and adjusting the midpoint of a starting point connecting wire and a finishing point connecting wire to obtain a final sag point of the wire;
extension determination unit: the method is used for obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
a center line determination unit: the curve is constructed according to the starting point coordinates, the vertical point coordinates, the end point coordinates and the wire outgoing direction of the wire connection, and is used as the central line of the connecting wire.
Model generation unit: an optimized model for split conductors and spacers is constructed from the conductor centerlines.
The method has the advantages that the real simulation and display problems of the split conductor and the spacer model of the split conductor in the transformer substation are solved through an innovative calculation and simulation method, and the engineering is optimally designed, so that the model is more accurate.
Drawings
Fig. 1 is a schematic diagram of an optimization modeling method for split conductors and spacers thereof in a three-dimensional design of a transformer substation.
Fig. 2 is a three-dimensional design modeling diagram of a substation according to the present invention.
Detailed Description
For a better understanding of the invention, the method of the invention is further described below with reference to the description of embodiments in conjunction with the accompanying drawings.
Numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of the invention. It will be appreciated, however, by one skilled in the art that the invention may be practiced without such specific details. In embodiments, well-known methods, procedures, and components have not been described in detail so as not to unnecessarily obscure embodiments.
Referring to fig. 1, the method for optimizing and modeling the spacer in the three-dimensional design of the transformer substation is characterized in that:
step 1: loading a three-dimensional design scene of the transmission line of the transformer substation;
step 2: determining a starting point connecting piece and a finishing point connecting piece for connecting the wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of the connecting wires according to the starting point connecting piece and the finishing point connecting piece;
step 3: calculating the outgoing line direction of the wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
step 4: determining the midpoints of a starting point and a finishing point connecting line according to the starting point coordinates and the finishing point coordinates of the wire connection and the wire outlet direction of the wire connection;
step 5: calculating sag information of the connecting wires, and adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires;
step 6: obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
step 7: and constructing a curve according to the starting point coordinate, the vertical point coordinate, the end point coordinate and the wire outgoing direction of the wire connection, and taking the curve as the central line of the connecting wire.
Step 8: and constructing an optimized model of the split conductor and the spacer according to the conductor center line.
Preferably, two, three, four, six, eight split conductors are supported.
Preferably, the step 5: calculating sag information of the connecting wires, specifically:
wherein f is a sag value, l is a distance from a start point to an end point of wire connection,is the height difference angle and d is the wire diameter.
Preferably, the step 5: calculating sag information of the connecting wires, and adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires, wherein the sag information is specifically as follows: and determining the midpoint coordinates of the starting and ending point connecting lines as (Cx, cy and Cz), wherein the sag value is f, and moving the midpoint coordinates by the sag value in the gravity direction to obtain the final sag coordinates of the lead as (Cx, cy and Cz-f).
Preferably, the step 8: an optimized model of split conductors and spacers is constructed according to the conductor center line, and specifically comprises:
step 8-1: creating a plane taking the direction of the starting point of the central line as a normal direction, and taking the starting point of the central line as the starting point center position of the split conductor on the plane;
step 8-2: creating a starting point of the split conductor by translation according to the split spacing;
step 8-3: drawing a circle with the diameter of the conductor by taking the starting point direction of the central line as a normal direction at the starting point position of the split conductor, and drawing a split conductor solid model by taking the circle as a contour and the central line as a path;
step 8-4: determining the spacing of the spacing bars and the positions of the spacing bars on the split conductors according to the shape and the central line information of the split conductors;
step 8-5: determining normal vector information of the position points of the split conductors where each spacer is located, and taking the normal vector of each position point as the placement trend of the spacer;
step 8-6: and (3) constructing an optimized model of the spacer according to the spacing of the spacer, the position of the spacer on the split conductor, the placement trend and the conductor split spacing.
And an optimization modeling system of a spacer in three-dimensional design of a transformer substation is characterized in that:
a loading unit: the method is used for loading three-dimensional scenes of the transmission line of the transformer substation;
a determination unit: the method comprises the steps of determining a starting point connecting piece and a finishing point connecting piece for connecting wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of connecting wires according to the starting point connecting piece and the finishing point connecting piece;
an outgoing line determining unit: the method comprises the steps of calculating the outgoing line direction of wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
midpoint determination unit: the method comprises the steps of determining the midpoint of a starting point and ending point connecting line according to the starting point coordinates and ending point coordinates of wire connection and the wire outgoing direction of the wire connection;
a vertical point determining unit: the method comprises the steps of calculating sag information of a connecting wire, and adjusting the midpoint of a starting point connecting wire and a finishing point connecting wire to obtain a final sag point of the wire;
extension determination unit: the method is used for obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
a center line determination unit: the curve is constructed according to the starting point coordinates, the vertical point coordinates, the end point coordinates and the wire outgoing direction of the wire connection, and is used as the central line of the connecting wire.
Model generation unit: an optimized model for split conductors and spacers is constructed from the conductor centerlines.
Preferably, two, three, four, six, eight split conductors are supported.
Preferably, the vertical point determining unit: the sag information for calculating the connecting wire is specifically:
wherein f is a sag value, l is a distance from a start point to an end point of wire connection,is the height difference angle and d is the wire diameter.
Preferably, the vertical point determining unit: the method is used for calculating sag information of the connecting wires, adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires, and specifically comprises the following steps: and determining the midpoint coordinates of the starting and ending point connecting lines as (Cx, cy and Cz), wherein the sag value is f, and moving the midpoint coordinates by the sag value in the gravity direction to obtain the final sag coordinates of the lead as (Cx, cy and Cz-f).
Preferably, wherein the model generating unit: the optimizing model for constructing the split conductor and the spacer according to the conductor center line specifically comprises the following steps:
a center determination unit: creating a plane taking the direction of the starting point of the central line as a normal direction, and taking the starting point of the central line as the starting point center position of the split conductor on the plane;
a start point determination unit: creating a starting point of the split conductor by translation according to the split spacing;
entity creation unit: drawing a circle with the diameter of the conductor by taking the starting point direction of the central line as a normal direction at the starting point position of the split conductor, and drawing a split conductor solid model by taking the circle as a contour and the central line as a path;
a position determination unit: determining the spacing of the spacing bars and the positions of the spacing bars on the split conductors according to the shape and the central line information of the split conductors;
strike determination unit: determining normal vector information of the position points of the split conductors where each spacer is located, and taking the normal vector of each position point as the placement trend of the spacer;
spacer construction unit: and (3) constructing an optimized model of the spacer according to the spacing of the spacer, the position of the spacer on the split conductor, the placement trend and the conductor split spacing.
The method has the advantages that the real simulation and display problems of the split conductor and the spacer model of the split conductor in the transformer substation are solved through an innovative calculation and simulation method, and the engineering is optimally designed, so that the model is more accurate.
Only the preferred embodiments of the present invention have been described herein, but it is not intended to limit the scope, applicability, and configuration of the invention. Rather, the detailed description of the embodiments will enable those skilled in the art to practice the embodiments. It will be understood that various changes and modifications may be made in the details without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An optimization modeling method of a spacer in three-dimensional design of a transformer substation is characterized by comprising the following steps of:
step 1: loading a three-dimensional design scene of the transformer substation;
step 2: determining a starting point connecting piece and a finishing point connecting piece for connecting the wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of the connecting wires according to the starting point connecting piece and the finishing point connecting piece;
step 3: calculating the outgoing line direction of the wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
step 4: determining the midpoints of a starting point and a finishing point connecting line according to the starting point coordinates and the finishing point coordinates of the wire connection and the wire outlet direction of the wire connection;
step 5: calculating sag information of the connecting wires, and adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires;
step 6: obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
step 7: constructing a curve according to the starting point coordinates, the vertical point coordinates, the end point coordinates and the wire outgoing direction of the wire connection, and taking the curve as the central line of the connecting wire;
step 8: and constructing an optimized model of the split conductor and the spacer according to the conductor center line.
2. The optimization modeling method for the spacer in the three-dimensional design of the transformer substation, which is disclosed in claim 1, can support wires with double split, three split, four split, six split and eight split.
3. The method for optimizing and modeling the spacer in the three-dimensional design of the transformer substation according to claim 1, wherein the step 5: calculating sag information of the connecting wires, specifically:
wherein f is a sag value, l is a distance from a start point to an end point of wire connection,is the height difference angle and d is the wire diameter.
4. The method for optimizing and modeling the spacer in the three-dimensional design of the transformer substation according to claim 1, wherein the step 5: calculating sag information of the connecting wires, and adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires, wherein the sag information is specifically as follows: and determining the midpoint coordinates of the starting and ending point connecting lines as (Cx, cy and Cz), wherein the sag value is f, and moving the midpoint coordinates by the sag value in the gravity direction to obtain the final sag coordinates of the lead as (Cx, cy and Cz-f).
5. The method for optimizing and modeling a spacer in a three-dimensional design of a transformer substation according to claim 1, wherein the step 8: an optimized model of split conductors and spacers is constructed according to the conductor center line, and specifically comprises:
step 8-1: creating a plane taking the direction of the starting point of the central line as a normal direction, and taking the starting point of the central line as the starting point center position of the split conductor on the plane;
step 8-2: creating a starting point of the split conductor by translation according to the split spacing;
step 8-3: drawing a circle with the diameter of the conductor by taking the starting point direction of the central line as a normal direction at the starting point position of the split conductor, and drawing a split conductor solid model by taking the circle as a contour and the central line as a path;
step 8-4: determining the spacing of the spacing bars and the positions of the spacing bars on the split conductors according to the shape and the central line information of the split conductors;
step 8-5: determining normal vector information of the position points of the split conductors where each spacer is located, and taking the normal vector of each position point as the placement trend of the spacer;
step 8-6: and (3) constructing an optimized model of the spacer according to the spacing of the spacer, the position of the spacer on the split conductor, the placement trend and the conductor split spacing.
6. An optimization modeling system of a spacer in three-dimensional design of a transformer substation is characterized in that:
a loading unit: the method is used for loading three-dimensional scenes of the transmission line of the transformer substation;
a determination unit: the method comprises the steps of determining a starting point connecting piece and a finishing point connecting piece for connecting wires, and determining starting point coordinates and finishing point coordinates of the wire connection and normal vector information of connecting wires according to the starting point connecting piece and the finishing point connecting piece;
an outgoing line determining unit: the method comprises the steps of calculating the outgoing line direction of wire connection according to the starting point coordinates and the end point coordinates of the wire connection and the normal vector information of the connecting wire;
midpoint determination unit: the method comprises the steps of determining the midpoint of a starting point and ending point connecting line according to the starting point coordinates and ending point coordinates of wire connection and the wire outgoing direction of the wire connection;
a vertical point determining unit: the method comprises the steps of calculating sag information of a connecting wire, and adjusting the midpoint of a starting point connecting wire and a finishing point connecting wire to obtain a final sag point of the wire;
extension determination unit: the method is used for obtaining the extension length and inflection point positions of the wire along the starting and ending directions according to the total weight of the wire and the elastic coefficient corresponding to the wire material specification;
a center line determination unit: the curve is constructed according to the starting point coordinates, the vertical point coordinates, the end point coordinates and the wire outgoing direction of the wire connection, and is used as the central line of the connecting wire;
model generation unit: an optimized model for split conductors and spacers is constructed from the conductor centerlines.
7. The optimized modeling system for the spacer in the three-dimensional design of the transformer substation, which is disclosed in claim 6, can support wires with double split, three split, four split, six split and eight split.
8. The optimizing modeling system of a spacer in a three-dimensional design of a transformer substation according to claim 6, wherein the vertical point determining unit: the sag information for calculating the connecting wire is specifically:
wherein f is a sag value, l is a distance from a start point to an end point of wire connection,is the height difference angle and d is the wire diameter.
9. The optimizing modeling system of a spacer in a three-dimensional design of a transformer substation according to claim 6, wherein the vertical point determining unit: the method is used for calculating sag information of the connecting wires, adjusting the midpoints of the starting and ending connecting wires to obtain final sag points of the wires, and specifically comprises the following steps: and determining the midpoint coordinates of the starting and ending point connecting lines as (Cx, cy and Cz), wherein the sag value is f, and moving the midpoint coordinates by the sag value in the gravity direction to obtain the final sag coordinates of the lead as (Cx, cy and Cz-f).
10. The optimizing modeling system of a spacer in a three-dimensional design of a transformer substation according to claim 6, wherein the model generating unit: the optimizing model for constructing the split conductor and the spacer according to the conductor center line specifically comprises the following steps:
a center determination unit: creating a plane taking the direction of the starting point of the central line as a normal direction, and taking the starting point of the central line as the starting point center position of the split conductor on the plane;
a start point determination unit: creating a starting point of the split conductor by translation according to the split spacing;
entity creation unit: drawing a circle with the diameter of the conductor by taking the starting point direction of the central line as a normal direction at the starting point position of the split conductor, and drawing a split conductor solid model by taking the circle as a contour and the central line as a path;
a position determination unit: determining the spacing of the spacing bars and the positions of the spacing bars on the split conductors according to the shape and the central line information of the split conductors;
strike determination unit: determining normal vector information of the position points of the split conductors where each spacer is located, and taking the normal vector of each position point as the placement trend of the spacer;
spacer construction unit: and (3) constructing an optimized model of the spacer according to the spacing of the spacer, the position of the spacer on the split conductor, the placement trend and the conductor split spacing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811244780.9A CN111090919B (en) | 2018-10-24 | 2018-10-24 | Optimal modeling method and system for spacer in three-dimensional design of transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811244780.9A CN111090919B (en) | 2018-10-24 | 2018-10-24 | Optimal modeling method and system for spacer in three-dimensional design of transformer substation |
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| CN111090919B true CN111090919B (en) | 2023-10-27 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130027892A (en) * | 2011-09-08 | 2013-03-18 | 박일흥 | Fluid circulation structure a space bar for pair glass |
| CN103676667A (en) * | 2013-12-04 | 2014-03-26 | 国家电网公司 | Three-dimensional simulation, measurement and control system for transformer substation project flexible conductor assembling |
| CN104834788A (en) * | 2015-05-20 | 2015-08-12 | 广东电网公司佛山供电局 | Multi-loop multi-splitting ground wire three-dimensional model real-time construction method for 500kV tower |
| CN105680367A (en) * | 2016-02-25 | 2016-06-15 | 中国电力工程顾问集团西南电力设计院有限公司 | Method for solving spacing rod problem of bundled conductor power transmission line pole tower |
-
2018
- 2018-10-24 CN CN201811244780.9A patent/CN111090919B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130027892A (en) * | 2011-09-08 | 2013-03-18 | 박일흥 | Fluid circulation structure a space bar for pair glass |
| CN103676667A (en) * | 2013-12-04 | 2014-03-26 | 国家电网公司 | Three-dimensional simulation, measurement and control system for transformer substation project flexible conductor assembling |
| CN104834788A (en) * | 2015-05-20 | 2015-08-12 | 广东电网公司佛山供电局 | Multi-loop multi-splitting ground wire three-dimensional model real-time construction method for 500kV tower |
| CN105680367A (en) * | 2016-02-25 | 2016-06-15 | 中国电力工程顾问集团西南电力设计院有限公司 | Method for solving spacing rod problem of bundled conductor power transmission line pole tower |
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| CN111090919A (en) | 2020-05-01 |
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