CN114397322A - Heat dissipation index measuring method, system and device based on shadow compensation - Google Patents
Heat dissipation index measuring method, system and device based on shadow compensation Download PDFInfo
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- CN114397322A CN114397322A CN202111422103.3A CN202111422103A CN114397322A CN 114397322 A CN114397322 A CN 114397322A CN 202111422103 A CN202111422103 A CN 202111422103A CN 114397322 A CN114397322 A CN 114397322A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 238000004590 computer program Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000691 measurement method Methods 0.000 claims 6
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a method, a system and a device for measuring a heat dissipation index based on shadow compensation, wherein the method comprises the following steps: calculating the time span of the radiation index measuring device covered by the cross arm projection of the iron tower within the preset date; under the standard condition, calculating the average deviation value of the cross arm projection to the heat dissipation index measured value; and in the time span range, if the deviation value between the current heat dissipation index measured value and the previous heat dissipation index measured value is smaller than the average deviation value, replacing the current heat dissipation index measured value with the previous heat dissipation index measured value. The invention has the beneficial effects that: by calculating the time span covered by the cross arm projection of the iron tower in the preset date of the heat dissipation index measuring device and continuously correcting the measured value of the heat dissipation index in the measuring process, the adverse deviation of measurement caused by the influence of the cross arm shadow of the iron tower can be effectively reduced, the phenomenon that the dynamic capacity increase margin of a wire of the power transmission line is too large in calculation is avoided, and the risk that the actual control operation current value of the power transmission line is larger is reduced.
Description
Technical Field
The invention relates to the technical field of heat dissipation index measurement, in particular to a method, a system and a device for measuring a heat dissipation index based on shadow compensation.
Background
With the increase of the power load, part of power grid heavy-load lines become obvious transmission bottlenecks, the transmission potential of the existing lines is excavated through dynamic capacity increase, and the method has important significance for relieving urban power supply pressure.
The chinese invention application CN110361415A discloses a method for measuring a heat dissipation index, which uses a heat dissipation test body to perform measurement, and mainly uses the measured heat dissipation index for dynamic capacity increase of a line wire. However, the heat dissipation index measuring device is usually installed on the south-facing side surface (applicable to the northern hemisphere) in the middle of the iron tower of the power transmission line, and for the power transmission line with the east-west trend, when the sun is close to direct incidence, the heat dissipation test body may be in the shadow of the cross arm of the iron tower, which causes inaccurate measurement data and causes a risk of calculating the excessive dynamic capacity-increasing margin of the lead of the power transmission line.
Disclosure of Invention
Aiming at the problems, the invention provides a method, a system and a device for measuring a heat dissipation index based on shadow compensation, which mainly solve the problem that the existing heat dissipation index measuring method has inaccurate measured data.
In order to solve the above technical problem, a first aspect of the present invention provides a method for measuring a heat dissipation index based on shadow compensation, including the following steps:
step one, calculating the time span of the radiation index measuring device covered by the cross arm projection of the iron tower within a preset date;
calculating the average deviation value of the cross arm projection to the heat dissipation index measured value under the standard condition;
and step three, in the time span range, if the deviation value between the current heat dissipation index measured value and the previous heat dissipation index measured value is smaller than the average deviation value, replacing the current heat dissipation index measured value with the previous heat dissipation index measured value.
In some embodiments, the time span is calculated by: acquiring longitude and latitude a of an iron tower where the heat dissipation index measuring device is located, acquiring orientation b of a cross arm and shape and size c of the cross arm, and acquiring height difference d between the heat dissipation index measuring device and the cross arm; and calculating a corresponding projection area and a corresponding projection path of the cross arm projection in the preset date by combining the longitude and latitude a, the orientation b, the shape and size c and the height difference d, comparing the projection area and the projection path with the position of the heat dissipation index measuring device, and calculating to obtain the time span of the heat dissipation index measuring device covered by the cross arm projection.
In some embodiments, the standard condition is no cloud rain occlusion on a sunny day.
In some embodiments, the heat dissipation index measuring device obtains at least three heat dissipation index measurements as samples to obtain the average deviation value.
In some embodiments, the longitude and latitude a is measured by a theodolite.
In some embodiments, the orientation b is measured by a compass.
In some embodiments, the shape dimension c is measured by a length measuring device and used to build a three-dimensional model.
In some embodiments, the height difference d is measured by a length detection device.
The second aspect of the present invention provides a heat dissipation index measurement system based on shadow compensation, including:
the time span calculation unit is used for calculating the time span covered by the cross arm projection of the iron tower within the preset date of the heat dissipation index measurement device;
the average deviation value calculating unit is used for calculating the average deviation value of the cross arm projection to the heat dissipation index measured value under the standard condition;
and the heat dissipation index measurement unit is used for replacing the current heat dissipation index measurement value with the previous heat dissipation index measurement value in the time span range if the deviation value between the current heat dissipation index measurement value and the previous heat dissipation index measurement value is smaller than the average deviation value.
A third aspect of the present invention provides a heat dissipation index measuring apparatus based on shadow compensation, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.
The invention has the beneficial effects that: by calculating the time span covered by the cross arm projection of the iron tower in the preset date of the heat dissipation index measuring device and continuously correcting the measured value of the heat dissipation index in the measuring process, the adverse deviation of measurement caused by the influence of the cross arm shadow of the iron tower can be effectively reduced, the phenomenon that the dynamic capacity increase margin of a wire of the power transmission line is too large in calculation is avoided, and the risk that the actual control operation current value of the power transmission line is larger is reduced.
Drawings
FIG. 1 is a flowchart illustrating a method for measuring a heat dissipation index based on shadow compensation according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a shadow compensation-based heat dissipation index measurement system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a shadow compensation-based heat dissipation index measurement apparatus according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following detailed description of the present invention is provided with reference to the accompanying drawings and detailed description. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Example one
The embodiment provides a method for measuring a heat dissipation index based on shadow compensation, as shown in fig. 1, which includes the following steps:
step one, calculating the time span of the radiation index measuring device covered by the cross arm projection of the iron tower within a preset date;
the time span calculation method comprises the following steps: acquiring longitude and latitude a of an iron tower where the heat dissipation index measuring device is located, acquiring orientation b of a cross arm and shape and size c of the cross arm, and acquiring height difference d between the heat dissipation index measuring device and the cross arm; and calculating a corresponding projection area and a projection path of the cross arm projection in a preset date by combining the longitude and latitude a, the orientation b, the shape size c and the height difference d, comparing the projection area and the projection path with the position of the heat dissipation index measuring device, and calculating to obtain the time span of the heat dissipation index measuring device covered by the cross arm projection.
In this embodiment, since the solar altitude is objectively changed according to time and can be obtained by a conventional means, only the latitude a, the orientation b, the shape and size c, and the altitude difference d need to be obtained, the projection area and the projection path of the cross arm projection corresponding to the preset date can be calculated, and then, whether the cross arm projection has shielding interference on the heat dissipation index measuring device in the preset date can be determined, so as to finally obtain the time span covered by the cross arm projection. For example, the experimental time (i.e. the preset date) of the designer is selected to be within a certain range from the X th day of the 2021 year X month to the X th day of the 2021 year X month, and the time length (i.e. the time span) covered by the cross arm projection of the heat dissipation index measuring device can be finally calculated through the above steps one to three.
Optionally, the longitude and latitude a are measured by a theodolite. The orientation b is measured by means of a compass. The shape dimension c is measured by a length measuring device and used to build a three-dimensional model. The height difference d is measured by a length measuring device.
Calculating the average deviation value of the cross arm projection to the heat dissipation index measured value under the standard condition;
under the condition that the heat dissipation index measurement device is used for obtaining an average deviation value by taking at least three heat dissipation index measurement values as samples.
And step three, in the time span range, if the deviation value between the current heat dissipation index measured value and the previous heat dissipation index measured value is smaller than the average deviation value, replacing the current heat dissipation index measured value with the previous heat dissipation index measured value.
According to the method and the device, the time span covered by the cross arm projection of the iron tower in the preset date is mainly calculated, and the measured value of the heat dissipation index is continuously corrected in the measuring process, so that the adverse measurement deviation caused by the influence of the shadow of the cross arm of the iron tower can be effectively reduced, the phenomenon that the dynamic capacity increase margin of the wire of the power transmission line is too large in calculation is avoided, and the risk that the actual control running current value of the power transmission line is larger is reduced.
Example two
Referring to fig. 2, the present embodiment provides a heat dissipation index measurement system based on shadow compensation, including:
the time span calculation unit 201 is used for calculating the time span of the radiation index measurement device covered by the cross arm projection of the iron tower within the preset date;
the time span calculation method comprises the following steps: acquiring longitude and latitude a of an iron tower where the heat dissipation index measuring device is located, acquiring orientation b of a cross arm and shape and size c of the cross arm, and acquiring height difference d between the heat dissipation index measuring device and the cross arm; and calculating a corresponding projection area and a projection path of the cross arm projection in a preset date by combining the longitude and latitude a, the orientation b, the shape size c and the height difference d, comparing the projection area and the projection path with the position of the heat dissipation index measuring device, and calculating to obtain the time span of the heat dissipation index measuring device covered by the cross arm projection.
Optionally, the longitude and latitude a are measured by a theodolite, the orientation b is measured by a compass, the shape and size c is measured by a length detection device and used for establishing a three-dimensional model, and the height difference d is measured by the length detection device.
The average deviation value calculating unit 202 is used for calculating the average deviation value of the cross arm projection to the heat dissipation index measured value under the standard condition;
the standard condition is that no cloud and rain are shielded in fine days, and the heat dissipation index measuring device at least obtains three heat dissipation index measured values as samples to obtain the average deviation value.
The heat dissipation index measurement unit 203 is configured to replace the current heat dissipation index measurement value with the previous heat dissipation index measurement value within the time span range if a deviation value between the current heat dissipation index measurement value and the previous heat dissipation index measurement value is smaller than the average deviation value.
EXAMPLE III
Referring to fig. 3, the apparatus for measuring a heat dissipation index based on shadow compensation according to the present embodiment includes a processor 31, a memory 32, and a computer program 33 stored in the memory 32 and capable of running on the processor 31, such as a heat dissipation index measuring method program based on shadow compensation. The processor 31 implements the steps of the first embodiment, such as the steps shown in fig. 1, when executing the computer program 33.
Illustratively, the computer program 33 may be partitioned into one or more modules/units that are stored in the memory 32 and executed by the processor 31 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 33 in the apparatus for measuring heat dissipation index based on shadow compensation. For example, the computer program 33 may be divided into a conversion module and a matching operation module.
The heat dissipation index measuring device based on shadow compensation can be computing equipment such as a desktop computer, a notebook computer, a palm computer and a cloud server. The shadow compensation based heat dissipation index measuring device may include, but is not limited to, a processor 31, a memory 32. It will be understood by those skilled in the art that fig. 3 is merely an example of the apparatus for measuring heat dissipation index based on shading compensation, and does not constitute a limitation of the apparatus for measuring heat dissipation index based on shading compensation, and may include more or less components than those shown in the drawings, or may combine some components, or different components, for example, the apparatus for measuring heat dissipation index based on shading compensation may further include an input-output device, a network access device, a bus, etc.
The Processor 31 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 32 may be an internal storage element of the shadow compensation based heat dissipation index measuring device, such as a hard disk or a memory of the shadow compensation based heat dissipation index measuring device. The memory 32 may also be an external storage device of the shadow compensation based heat dissipation index measuring apparatus, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are equipped on the shadow compensation based heat dissipation index measuring apparatus. Further, the memory 32 may also include both an internal storage unit and an external storage device of the shadow compensation based heat dissipation index measurement apparatus. The memory 32 is used for storing the computer program and other programs and data required by the shadow compensation based heat dissipation index measuring device. The memory 32 may also be used to temporarily store data that has been output or is to be output.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A heat dissipation index measuring method based on shadow compensation is characterized by comprising the following steps:
calculating the time span of the radiation index measuring device covered by the cross arm projection of the iron tower within the preset date;
under the standard condition, calculating the average deviation value of the cross arm projection to the heat dissipation index measured value;
and in the time span range, if the deviation value between the current heat dissipation index measurement value and the previous heat dissipation index measurement value is smaller than the average deviation value, replacing the current heat dissipation index measurement value with the previous heat dissipation index measurement value.
2. The shadow compensation-based heat dissipation index measurement method of claim 1, wherein the time span is calculated by:
acquiring longitude and latitude a of an iron tower where the heat dissipation index measuring device is located, acquiring orientation b of a cross arm and shape and size c of the cross arm, and acquiring height difference d between the heat dissipation index measuring device and the cross arm;
and calculating a corresponding projection area and a corresponding projection path of the cross arm projection in the preset date by combining the longitude and latitude a, the orientation b, the shape and size c and the height difference d, comparing the projection area and the projection path with the position of the heat dissipation index measuring device, and calculating to obtain the time span of the heat dissipation index measuring device covered by the cross arm projection.
3. The method of claim 1, wherein the standard condition is no cloud and rain shielding on a sunny day.
4. The method according to claim 3, wherein the heat dissipation index measuring device obtains at least three heat dissipation index measurements as samples to obtain the average deviation value.
5. The shadow compensation-based heat dissipation index measurement method of claim 2, wherein the longitude and latitude a are measured by a theodolite.
6. The shadow compensation-based heat dissipation index measurement method of claim 2, wherein the orientation b is measured by a compass.
7. The shadow compensation-based heat dissipation index measurement method of claim 2, wherein the shape size c is measured by a length detection device and used to build a three-dimensional model.
8. The shadow compensation-based heat dissipation index measurement method of claim 2, wherein the height difference d is measured by a length detection device.
9. A shadow compensation based heat dissipation index measurement system, comprising:
the time span calculation unit is used for calculating the time span covered by the cross arm projection of the iron tower within the preset date of the heat dissipation index measurement device;
the average deviation value calculating unit is used for calculating the average deviation value of the cross arm projection to the heat dissipation index measured value under the standard condition;
and the heat dissipation index measurement unit is used for replacing the current heat dissipation index measurement value with the previous heat dissipation index measurement value in the time span range if the deviation value between the current heat dissipation index measurement value and the previous heat dissipation index measurement value is smaller than the average deviation value.
10. A shadow compensation based heat dissipation index measurement apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of the shadow compensation based heat dissipation index measurement method according to any one of claims 1 to 8.
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