A construction method based on high voltage transmission and transformation overhead line

Abstract

The present invention relates to the field of electric power construction, and in particular to a construction method based on a high-voltage power transmission and transformation overhead line, comprising: conducting construction survey based on a construction path; determining a preliminary construction plan; constructing an overhead line virtual model according to parameters of the construction plan; determining that a simulation verification strategy of the overhead line virtual model of the length section is a vibration simulation verification strategy or a load simulation verification strategy; under the vibration simulation verification strategy, judging whether the construction parameters of a tower meet preset standards according to the maximum amplitude of a single tower; under the load simulation verification strategy, judging whether the construction parameters of a tower meet preset standards according to the maximum deformation rate of a single tower; outputting parameters of the overhead line construction plan that has completed simulation verification and completing the update of the construction plan; conducting construction according to the updated construction plan, verifying and optimizing the construction parameters through virtual simulation authorization, and improving the efficiency of construction.

Description

Technical Field

[0001] The invention relates to the field of electric power construction, and in particular to a construction method based on high-voltage power transmission and transformation overhead lines. Background Art

[0002] The rapid development of the scale of power grids and the increasing complexity of the external environment have brought new challenges to power grid construction. There are more and more new high-voltage overhead transmission and transformation lines under construction, and the terrain of new line construction is becoming more and more complex. Digital technology has been widely and deeply studied in the field of power grid design and construction, but as an important part of the whole life cycle management, the application depth of digital technology in the infrastructure stage is relatively low.

[0003] The construction of high-voltage overhead power transmission and transformation lines has the characteristics of high safety risks, great construction difficulty, and low construction efficiency. The existing construction plan determination and construction parameters during the construction process lack corresponding virtual verification means. The existing ones verify the stress state of the construction infrastructure through virtual mechanical analysis, but lack system simulation verification of the entire high-voltage overhead power transmission and transformation lines. Summary of the invention

[0004] To this end, the present invention provides a construction method based on high-voltage power transmission and transformation overhead lines, so as to overcome the lack of overall virtual simulation verification for the construction of high-voltage power transmission and transformation overhead lines in the prior art, resulting in inaccurate construction parameters and affecting construction efficiency.

[0005] To achieve the above object, the present invention provides a construction method based on a high-voltage power transmission and transformation overhead line, comprising:

[0006] Step S1, performing construction survey based on the construction path, the survey information includes topographic information, geological condition information and historical meteorological information;

[0007] Step S2, determining a preliminary construction plan based on the survey information;

[0008] Step S3, constructing a virtual model of the overhead line according to the parameters of the construction plan;

[0009] Step S4, determining, based on the height difference within the construction path of a preset length, that the simulation verification strategy of the virtual model of the overhead line of the length section is a vibration simulation verification strategy or a load simulation verification strategy;

[0010] Step S5, under the vibration simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum amplitude of the single tower;

[0011] Step S6, under the load simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum deformation rate of a single tower;

[0012] Step S7, outputting the parameters of the overhead line construction plan after the simulation verification and completing the update of the construction plan;

[0013] Step S8, performing construction according to the updated construction plan.

[0014] Furthermore, in step S4, the process of determining the simulation verification strategy of the overhead line virtual model based on the height difference within the construction path of the preset length includes:

[0015] The height difference is compared with a preset height difference threshold,

[0016] If the height difference is less than a preset height difference threshold, a vibration simulation verification strategy is used to complete the simulation verification of the overhead line virtual model;

[0017] If the height difference is greater than or equal to a preset height difference threshold, a load simulation verification strategy is used to complete the simulation verification of the overhead line virtual model.

[0018] Furthermore, the step S5 comprises:

[0019] S501, applying a preset vibration load to the midpoint of the conductor between the towers;

[0020] S502, completing the simulation operation of the vibration load;

[0021] S503, outputting vibration information of each of the towers;

[0022] S504: Determine whether the construction parameters of a single tower meet preset standards based on the maximum amplitude of the tower.

[0023] Furthermore, when the average wind speed in the historical meteorological information is greater than a preset wind speed threshold, the preset vibration load is adjusted according to the difference between the average wind speed and the preset wind speed threshold.

[0024] Furthermore, when it is determined based on the maximum amplitude of a single tower that the construction parameters of the tower do not meet the preset standards, the reason why the construction parameters of the tower do not meet the preset standards is determined based on the ratio of the towers whose maximum amplitude exceeds the first preset amplitude threshold within the construction path of the preset length to the total number of towers within the construction path of the preset length, or it is determined that the reason for not meeting the preset standards is that the strength of the tower pile foundation does not meet the standards, and the depth of the tower pile foundation is increased according to the difference between the maximum amplitude and the second preset amplitude threshold.

[0025] Furthermore, several depth adjustment methods are provided for increasing the depth of the tower pile foundation, and each depth adjustment method has a different increase in the depth of the tower pile foundation.

[0026] Furthermore, under the first preset condition, several correction methods are provided for the increase in the depth of the tower pile foundation, and each correction method has a different correction amplitude for the increase in the depth of the tower pile foundation. The first preset condition is that the soil bearing capacity characteristic value of the tower for which the pile foundation depth needs to be increased is greater than a preset bearing capacity threshold.

[0027] Further, the reason why the construction parameters of the tower do not meet the preset standards is determined based on the ratio of the towers whose maximum amplitude exceeds the first preset amplitude threshold in the construction path of the preset length to the total number of towers in the construction path of the preset length, wherein:

[0028] If the proportion is less than a preset proportion threshold, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the wire layout does not meet the standards, and the layout length of the wires on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion;

[0029] If the proportion is greater than or equal to the preset proportion threshold, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the layout spacing of the towers does not meet the standards, and the layout spacing of the towers on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion.

[0030] Furthermore, the reduction range of the layout spacing is positively correlated with the proportion difference; the proportion difference is the difference between the preset proportion threshold and the proportion.

[0031] Furthermore, the step S6 comprises:

[0032] S601, applying a preset load to the midpoint of the conductor between the towers;

[0033] S602, completing the simulation operation of load loading;

[0034] S603, outputting deformation information of each of the towers;

[0035] S604: Under the condition that the maximum deformation rate of a single tower is greater than a preset deformation rate threshold, reduce the layout spacing of towers on both sides of the tower according to the difference between the maximum deformation rate and the preset deformation rate threshold.

[0036] Compared with the prior art, the beneficial effect of the present invention is that the present invention aims at the construction of high-voltage transmission and transformation overhead lines, by constructing a virtual model of the overhead lines, and determining and formulating different simulation verification strategies based on the surveyed construction data, so as to perform accurate virtual verification for plain construction and mountain construction.

[0037] Furthermore, the present invention loads a preset vibration load to the midpoint of the conductor between each tower and determines whether the construction parameters of the tower meet the standards by verifying the maximum amplitude of the tower after completing the vibration simulation verification, thereby setting an accurate evaluation benchmark for optimizing the construction parameters.

[0038] Furthermore, the present invention also optimizes the vibration load based on the surveyed wind speed, thereby improving the accuracy of the simulation.

[0039] Furthermore, the present invention determines the optimization scheme and optimization accuracy of the depth of the tower pile foundation, the conductor laying length, and the tower laying spacing, and finally verifies and optimizes the construction parameters through virtual simulation authorization, thereby preventing construction failures due to construction survey errors and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flow chart of a construction method based on a high-voltage power transmission and transformation overhead line according to an embodiment of the present invention;

[0041] Figure 2 A flow chart of a simulation verification strategy for determining a virtual model of an overhead line according to an embodiment of the present invention;

[0042] Figure 3 This is a flow chart of an embodiment of the present invention for determining whether the construction parameters of a single tower meet preset standards based on the maximum amplitude of the tower;

[0043] Figure 4 The present invention is a flowchart of determining a tower pile foundation depth adjustment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] Those skilled in the art will appreciate that the method of the present invention for determining a single parameter mentioned above may be to select the value with the highest proportion as the preset standard parameter based on data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by using the formula as the preset standard parameter or other selection methods, as long as the system of the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0047] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a flow chart of a construction method based on a high-voltage power transmission and transformation overhead line according to an embodiment of the present invention; a flow chart of a simulation verification strategy for determining a virtual model of an overhead line according to an embodiment of the present invention; a flow chart of determining whether the construction parameters of a tower meet preset standards based on the maximum amplitude of a single tower according to an embodiment of the present invention; and a flow chart of determining a tower pile foundation depth adjustment method according to an embodiment of the present invention.

[0048] The present invention provides a construction method based on a high-voltage power transmission and transformation overhead line, comprising:

[0049] Step S1, performing construction survey based on the construction path, the survey information includes topographic information, geological condition information and historical meteorological information;

[0050] Step S2, determining a preliminary construction plan based on the survey information;

[0051] Step S3, constructing a virtual model of the overhead line according to the parameters of the construction plan;

[0052] Step S4, determining, based on the height difference within the construction path of a preset length of 3.00 km, that the simulation verification strategy of the virtual model of the overhead line of the length section is a vibration simulation verification strategy or a load simulation verification strategy;

[0053] Step S5, under the vibration simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum amplitude of the single tower;

[0054] Step S6, under the load simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum deformation rate of a single tower;

[0055] Step S7, outputting the parameters of the overhead line construction plan after the simulation verification and completing the update of the construction plan;

[0056] Step S8, performing construction according to the updated construction plan.

[0057] It should be pointed out that the data in this embodiment are all obtained by the method of the present invention through preliminary construction verification before this test. Each preset value can be adjusted according to the specific usage, as long as the method of the present invention can clearly define different specific situations in the single determination process through the obtained values. The preset values ​​set in this embodiment are all obtained based on the preliminary construction data, including each correction coefficient, which is also selected through construction verification.

[0058] Specifically, the topographic information includes the altitude of each tower installation point.

[0059] Specifically, the geological condition information includes soil bearing capacity characteristic value

[0060] Specifically, the historical meteorological information includes humidity, annual average wind speed and temperature, and the historical meteorological information is retrieved from the meteorological station in the construction area.

[0061] Specifically, a virtual model of the overhead line is constructed and simulation verification is completed using virtual simulation software, such as Ansys engineering simulation software.

[0062] Specifically, the height difference within the construction path of the preset length is obtained based on the surveyed topographic information. It can be understood that the height difference is the difference between the highest altitude and the lowest altitude of the tower setting point of the construction path of the preset length.

[0063] Specifically, in step S4, the process of determining the simulation verification strategy of the overhead line virtual model based on the height difference within the construction path of the preset length includes:

[0064] The height difference is compared with a preset height difference threshold,

[0065] If the height difference is less than a preset height difference threshold, a vibration simulation verification strategy is used to complete the simulation verification of the overhead line virtual model;

[0066] If the height difference is greater than or equal to a preset height difference threshold, a load simulation verification strategy is used to complete the simulation verification of the overhead line virtual model;

[0067] Set the preset height difference threshold to 200m.

[0068] Specifically, step S5 includes:

[0069] S501, applying a preset vibration load to the midpoint of the conductor between the towers;

[0070] S502, completing the simulation operation of the vibration load;

[0071] S503, outputting vibration information of each of the towers;

[0072] S504: Determine whether the construction parameters of a single tower meet preset standards based on the maximum amplitude of the tower.

[0073] Specifically, the amplitude of the preset vibration load is 85 mm, the frequency is 135 Hz, and the action duration is 5 s.

[0074] Specifically, when the average wind speed in the historical meteorological information is greater than the preset wind speed threshold of 14.9 m / s, the preset vibration load is adjusted according to the difference between the average wind speed and the preset wind speed threshold. For example, if the surveyed average wind speed is 19.5 m / s, which is greater than the preset wind speed threshold of 14.9 m / s, the amplitude of the preset vibration load is increased and adjusted. The amplitude adjustment amplitude of the preset vibration load is set to △Z, and the difference between the average wind speed and the preset wind speed threshold is set to △V. Then △Z=α×△V, α is the vibration load adjustment coefficient, and α is set to 1.05. It can be understood that the greater the difference between the average wind speed and the preset wind speed threshold, the greater the increase in the amplitude of the preset vibration load.

[0075] Specifically, based on the maximum amplitude of a single tower, it is determined whether the construction parameters of the tower meet the preset standards, wherein:

[0076] If the maximum amplitude is less than the first preset amplitude threshold of 5.00 mm, it is determined that the construction parameters of the tower meet the preset standards, and whether the construction parameters of the next tower meet the preset standards is determined;

[0077] If the maximum amplitude is greater than or equal to the first preset amplitude threshold and less than the second preset amplitude threshold of 12.58 mm, it is determined that the construction parameters of the tower do not meet the preset standards, and the reason why the construction parameters of the tower do not meet the preset standards is determined based on the ratio of the towers with the maximum amplitude exceeding the first preset amplitude threshold within the construction path of the preset length of 3 km to the total number of towers within the construction path of the preset length;

[0078] If the maximum amplitude is greater than or equal to a second preset amplitude threshold, it is determined that the construction parameters of the tower do not meet the preset standards and the reason for not meeting the preset standards is determined to be that the strength of the tower pile foundation does not meet the standards, and the depth of the tower pile foundation is increased according to the difference between the maximum amplitude and the second preset amplitude threshold.

[0079] Specifically, several depth adjustment methods are provided for increasing the depth of the tower pile foundation, among which:

[0080] If the amplitude difference is less than the first preset amplitude difference of 2.24 mm, the depth of the tower pile foundation after adjustment is determined by using the first preset adjustment coefficient of 1.04 and multiplying it by the depth of the tower pile foundation before adjustment;

[0081] If the amplitude difference is greater than or equal to the first preset amplitude difference and less than the second preset amplitude difference of 4.58 mm, the depth of the tower pile foundation after adjustment is determined by multiplying the second preset adjustment coefficient 1.10 by the depth of the tower pile foundation before adjustment;

[0082] If the amplitude difference is greater than or equal to the second preset amplitude difference, the depth of the tower pile foundation after adjustment is determined by using the third preset adjustment coefficient 1.18 and multiplying it by the tower pile foundation depth before adjustment;

[0083] The amplitude difference is the difference between the maximum amplitude and the second preset amplitude threshold.

[0084] Specifically, under the first preset condition, several correction methods are provided for the increase of the tower pile foundation depth, wherein:

[0085] If the bearing capacity difference is less than the first preset bearing capacity difference of 5.50 kPa, the first preset correction coefficient of 0.998 is used to determine the depth of the tower pile foundation after correction by multiplying it by the depth of the tower pile foundation before correction;

[0086] If the bearing capacity difference is greater than or equal to the first preset bearing capacity difference of 5.50 kPa and less than the second preset bearing capacity difference of 11.20 kPa, the depth of the tower pile foundation after correction is determined by multiplying the first preset correction coefficient of 0.994 by the depth of the tower pile foundation before correction;

[0087] If the bearing capacity difference is greater than or equal to the second preset bearing capacity difference of 5.50 kPa, the depth of the tower pile foundation after correction is determined by multiplying the third preset correction coefficient of 0.982 by the depth of the tower pile foundation before correction;

[0088] The bearing capacity difference is the difference between the soil bearing capacity characteristic value of the tower frame that requires increasing the pile foundation depth and the preset bearing capacity threshold;

[0089] The first preset condition is that the soil bearing capacity characteristic value of the tower frame that needs to increase the pile foundation depth is greater than the preset bearing capacity threshold of 140 kPa.

[0090] Specifically, the reason why the construction parameters of the tower do not meet the preset standards is determined based on the ratio of the towers whose maximum amplitude exceeds the first preset amplitude threshold in the construction path of the preset length to the total number of towers in the construction path of the preset length, wherein:

[0091] If the proportion is less than a preset proportion threshold of 23.00%, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the wire layout does not meet the standards, and the layout length of the wires on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion;

[0092] If the proportion is greater than or equal to the preset proportion threshold, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the layout spacing of the towers does not meet the standards, and the layout spacing of the towers on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion.

[0093] Specifically, the reduction in the layout spacing is positively correlated with the proportion difference; the proportion difference is the difference between the preset proportion threshold and the proportion. It can be understood that the larger the proportion difference is, the greater the reduction in the layout spacing is.

[0094] Specifically, step S6 includes:

[0095] S601, applying a preset load of 28 KN to the midpoint of the conductor between the towers;

[0096] S602, completing the simulation operation of load loading;

[0097] S603, outputting deformation information of each of the towers;

[0098] S604: Under the condition that the maximum deformation rate of a single tower is greater than a preset deformation rate threshold of 1.15%, the arrangement spacing of towers on both sides of the tower is reduced according to the difference between the maximum deformation rate and the preset deformation rate threshold.

[0099] Specifically, the maximum deformation rate of the tower is the percentage ratio of the lateral offset distance of the highest point of the tower to the height of the tower.

[0100] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method based on a high-voltage power transmission and transformation overhead line, characterized in that: include: Step S1, performing construction survey based on the construction path, the survey information includes topographic information, geological condition information and historical meteorological information; Step S2, determining a preliminary construction plan based on the survey information; Step S3, constructing a virtual model of the overhead line according to the parameters of the construction plan; Step S4, determining, based on the height difference within the construction path of a preset length, that the simulation verification strategy of the virtual model of the overhead line of the length section is a vibration simulation verification strategy or a load simulation verification strategy; Step S5, under the vibration simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum amplitude of the single tower; Step S6, under the load simulation verification strategy, judging whether the construction parameters of the tower meet the preset standards according to the maximum deformation rate of a single tower; Step S7, outputting the parameters of the overhead line construction plan after the simulation verification and completing the update of the construction plan; Step S8, performing construction according to the updated construction plan; In step S4, the process of determining the simulation verification strategy of the overhead line virtual model based on the height difference within the construction path of the preset length includes: The height difference is compared with a preset height difference threshold, If the height difference is less than a preset height difference threshold, a vibration simulation verification strategy is used to complete the simulation verification of the overhead line virtual model; If the height difference is greater than or equal to a preset height difference threshold, a load simulation verification strategy is used to complete the simulation verification of the overhead line virtual model; The step S5 comprises: S501, applying a preset vibration load to the midpoint of the conductor between the towers; S502, completing the simulation operation of the vibration load; S503, outputting vibration information of each of the towers; S504, determining whether the construction parameters of a single tower meet preset standards based on the maximum amplitude of the tower; The step S6 comprises: S601, applying a preset load to the midpoint of the conductor between the towers; S602, completing the simulation operation of load loading; S603, outputting deformation information of each of the towers; S604: Under the condition that the maximum deformation rate of a single tower is greater than a preset deformation rate threshold, reduce the layout spacing of towers on both sides of the tower according to the difference between the maximum deformation rate and the preset deformation rate threshold.

2. The construction method based on high-voltage power transmission and transformation overhead line according to claim 1 is characterized in that: When the average wind speed in the historical meteorological information is greater than a preset wind speed threshold, the preset vibration load is adjusted according to the difference between the average wind speed and the preset wind speed threshold.

3. The construction method based on high-voltage power transmission and transformation overhead line according to claim 2 is characterized in that: When it is determined based on the maximum amplitude of a single tower that the construction parameters of the tower do not meet the preset standards, the reason why the construction parameters of the tower do not meet the preset standards is determined based on the ratio of the towers whose maximum amplitude exceeds the first preset amplitude threshold within the construction path of the preset length to the total number of towers within the construction path of the preset length, or it is determined that the reason for not meeting the preset standards is that the strength of the tower pile foundation does not meet the standards, and the depth of the tower pile foundation is increased according to the difference between the maximum amplitude and the second preset amplitude threshold.

4. The construction method based on high-voltage power transmission and transformation overhead line according to claim 3 is characterized in that: Several depth adjustment methods are provided for increasing the depth of the tower pile foundation, and each depth adjustment method has a different increase in the depth of the tower pile foundation.

5. The construction method based on high-voltage power transmission and transformation overhead line according to claim 4 is characterized in that: Under the first preset condition, several correction methods are provided for the increase in the depth of the tower pile foundation, and each correction method has a different correction range for the increase in the depth of the tower pile foundation. The first preset condition is that the soil bearing capacity characteristic value of the tower for which the pile foundation depth needs to be increased is greater than a preset bearing capacity threshold.

6. The construction method based on high-voltage power transmission and transformation overhead line according to claim 5 is characterized in that: The reason why the construction parameters of the tower do not meet the preset standards is determined based on the proportion of the towers whose maximum amplitude exceeds the first preset amplitude threshold in the construction path of the preset length to the total number of towers in the construction path of the preset length, wherein: If the proportion is less than a preset proportion threshold, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the wire layout does not meet the standards, and the layout length of the wires on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion; If the proportion is greater than or equal to the preset proportion threshold, it is determined that the reason why the construction parameters of the tower do not meet the preset standards is that the layout spacing of the towers does not meet the standards, and the layout spacing of the towers on both sides of the tower is reduced according to the difference between the preset proportion threshold and the proportion.

7. The construction method based on high-voltage power transmission and transformation overhead line according to claim 6 is characterized in that: The reduction range of the layout spacing is positively correlated with the proportion difference; the proportion difference is the difference between the preset proportion threshold and the proportion.

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