CN112098133A - Method and device for evaluating heat dissipation capacity of heat radiator and storage medium - Google Patents
Method and device for evaluating heat dissipation capacity of heat radiator and storage medium Download PDFInfo
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- CN112098133A CN112098133A CN202011001225.0A CN202011001225A CN112098133A CN 112098133 A CN112098133 A CN 112098133A CN 202011001225 A CN202011001225 A CN 202011001225A CN 112098133 A CN112098133 A CN 112098133A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011156 evaluation Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims description 53
- 239000000523 sample Substances 0.000 claims description 33
- 239000013074 reference sample Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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Abstract
The invention relates to the technical field of electric power, and discloses a method and a device for evaluating heat dissipation capacity of a heat radiator and a storage medium. The heat dissipation capacity evaluation method comprises the following steps: acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time, and calculating the difference value of the temperature of the oil inlet and the temperature of the oil outlet to obtain the temperature difference change rate of the radiator; and evaluating the heat dissipation capacity of the heat radiator according to the temperature difference change rate. The embodiment of the invention calculates the temperature difference change rate of the radiator through an actual measurement method, so as to evaluate the heat dissipation capacity of the radiator.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a method and a device for evaluating heat dissipation capacity of a heat sink and a storage medium.
Background
Under the condition of high ambient temperature or large load, the generated heat can not be quickly dissipated through a radiator, so that the oil temperature is high, and the output capacity of the transformer is insufficient.
In order to effectively dissipate heat generated by a winding and an iron core inside a transformer, a water cooling or air cooling mode is generally adopted to enhance the heat dissipation effect of a radiator at present, and no effective means is currently used for monitoring and evaluating the heat dissipation capability of the transformer radiator on line in real time, so that the start and stop of a water cooling device and an air cooling device are mainly controlled by methods such as experience of technicians, infrared temperature measurement fixed-point inspection and the like, and the control method not only consumes a large amount of manpower and material resources, but also has poor practicability.
Disclosure of Invention
The invention aims to provide a method and a device for evaluating the heat dissipation capacity of a radiator and a storage medium, which can reduce the working strength of workers and improve the automation degree.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat dissipation capacity evaluation method of a heat sink is disclosed, wherein the heat sink is used for dissipating heat of a transformer; the method comprises the following steps:
acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time, and calculating the difference value of the temperature of the oil inlet and the temperature of the oil outlet to obtain the temperature difference change rate of the radiator;
and evaluating the heat dissipation capacity of the heat radiator according to the temperature difference change rate.
Optionally, the number of the radiators is multiple, and the radiators are all installed on the same side of the transformer, where the same side is a high-voltage side or a low-voltage side;
the heat dissipation capability evaluation method further comprises the following steps: comparing the heat dissipation capacities of the plurality of radiators, and determining the radiator with the worst heat dissipation capacity as a reference sample; and controlling the cooling devices on the same side to work according to the reference sample.
Optionally, the controlling the cooling device on the same side to operate according to the sample includes:
and judging whether the temperature rise change rate of the temperature of the oil inlet according to the sample exceeds a first threshold value, and if so, controlling the cooling device to be started.
Optionally, the controlling the cooling device on the same side to operate according to the sample further includes:
and after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample.
Optionally, the controlling the cooling device on the same side to operate according to the sample further includes:
and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
Optionally, the evaluating the heat dissipation capability of the heat sink according to the temperature difference change rate includes:
acquiring the mean value of the temperature difference change rate of each radiator in a preset period;
and comparing the average values of the temperature difference change rates of the radiators, and determining the radiator with the minimum average value as the radiator with the worst heat dissipation capacity.
A heat dissipation capability evaluation device of a radiator comprises a temperature acquisition unit and a capability evaluation unit;
the temperature acquisition unit is used for acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time;
and the capacity evaluation unit is used for calculating the difference value between the oil inlet temperature and the oil outlet temperature, obtaining the temperature difference change rate of the radiator, and evaluating the heat dissipation capacity of the radiator according to the temperature difference change rate.
Optionally, the number of the radiators is multiple, and the radiators are all installed on the same side of the transformer, where the same side is a high-voltage side or a low-voltage side;
the heat dissipation capacity evaluation device also comprises a cooling control unit which is used for comparing the heat dissipation capacities of the plurality of radiators, determining the radiator with the worst heat dissipation capacity as a reference sample, and controlling the cooling device on the same side to work according to the reference sample.
Optionally, the cooling control unit is specifically configured to:
judging whether the temperature rise change rate according to the temperature of the oil inlet of the sample exceeds a first threshold value or not, and if so, controlling the cooling device to be started;
after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample;
and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
A storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps of the heat dissipation capability assessment method as described in any one of the above.
Compared with the prior art, the invention has the beneficial effects that:
the embodiment of the invention calculates the temperature difference change rate of the radiator through an actual measurement method, so as to evaluate the heat dissipation capacity of the radiator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a heat dissipation capability evaluation method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for evaluating the heat dissipation capacity of a heat sink for heat dissipation of a transformer, which comprises the following steps: acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time, and calculating the difference value of the temperature of the oil inlet and the temperature of the oil outlet to obtain the temperature difference change rate of the radiator; and evaluating the heat dissipation capacity of the heat radiator according to the temperature difference change rate.
Theoretically, the larger the temperature difference change rate is, the higher the heat dissipation capacity of the radiator is; the smaller the rate of change of the temperature difference, the lower the heat dissipation capacity of the heat sink. Actually, a mapping relation table of the temperature difference change rate and the heat dissipation capacity can be counted in advance according to experiments, and the heat dissipation capacity of the radiator can be quickly evaluated as a reference.
It should be noted that, in the embodiment of the present invention, the temperature difference change rate of the heat sink is calculated by an actual measurement method, and the heat dissipation capability of the heat sink is evaluated accordingly.
In general, in practical applications, in order to improve heat dissipation efficiency, a plurality of heat sinks are installed on the same side (high-voltage side or low-voltage side) of the transformer. In this case, the method for evaluating heat dissipation capability provided by the present invention may further include: and comparing the heat dissipation capacities of the plurality of radiators positioned on the same side, determining the radiator with the worst heat dissipation capacity as a sample, and controlling the cooling devices on the same side to work according to the sample.
It will be appreciated that the same means can be used for the control of the cooling means of the current side, for the high-pressure side and the low-pressure side, respectively.
Illustratively, the specific method for controlling the operation of the cooling device on the same side according to the sample comprises the following steps:
judging whether the temperature rise change rate according to the temperature of the oil inlet of the sample exceeds a first threshold value or not, and if so, controlling the cooling device to be started;
after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample;
and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
The first threshold, the second threshold, and the third threshold may be flexibly set according to actual situations, and the embodiment of the present invention is not limited.
For easy understanding, referring to fig. 1, the present embodiment provides an application example of a heat dissipation capability evaluation method, which specifically includes the steps of:
(1) temperature sensors are arranged at oil inlets and oil outlets of the radiators and used for collecting the temperatures of the inlets and the outlets of the radiators, the temperature collection intervals of the temperature sensors are set to be 1 minute, and if the transformer has 14 groups of radiators (7 groups on a high-voltage side and 7 groups on a low-voltage side), namely the collected temperatures are T respectivelyi1And To1、Ti2And To2、……、Ti14And To14。
Wherein T isijAnd TokThe oil inlet temperature and the oil outlet temperature of the radiator are respectively set, j is 1-14, k is 1-14, wherein 1-7 represents the serial number of the radiator at the high pressure side, and 8-14 represents the serial number of the radiator at the low pressure side.
(2) Calculating the temperature difference delta T between the oil inlet and the oil outlet of each radiator, namely delta T1＝Ti1-To1、ΔT2＝Ti2-To2、……、ΔT14＝Ti14-To14。
(3) Calculating the rate of change k of the temperature difference of each radiator, i.e.
The larger the k value is, the stronger the heat dissipation capability of the radiator is, whereas the smaller the k value is, the worse the heat dissipation capability of the radiator surface is.
(4) And selecting the radiator with the lowest k value average value in 7 groups of radiators on the high-voltage side of the transformer radiator in 1 week through comparison of measured values, and simultaneously selecting the radiator with the lowest k value average value in 7 groups of radiators on the low-voltage side of the transformer radiator in 1 week to serve as the basis for starting and stopping the water cooling device or the air cooling device on each side.
The embodiment of the invention also provides a heat dissipation capability evaluation device, which comprises a temperature acquisition unit and a capability evaluation unit;
the temperature acquisition unit is used for acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time;
and the capacity evaluation unit is used for calculating the difference value of the temperature of the oil inlet and the temperature of the oil outlet, obtaining the temperature difference change rate of the radiator and evaluating the heat dissipation capacity of the radiator according to the temperature difference change rate.
The cooling capacity evaluation device also comprises a cooling control unit which is used for comparing the cooling capacities of the radiators, determining the radiator with the worst cooling capacity as a reference sample, and controlling the cooling device on the same side to work according to the reference sample.
Optionally, the cooling control unit is specifically configured to: judging whether the temperature rise change rate according to the temperature of the oil inlet of the sample exceeds a first threshold value or not, and if so, controlling the cooling device to be started; after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample; and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.
To this end, an embodiment of the present invention provides a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in the keyboard display method provided in the embodiment of the present invention.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A heat dissipation capacity evaluation method of a heat sink is disclosed, wherein the heat sink is used for dissipating heat of a transformer; the method is characterized by comprising the following steps:
acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time, and calculating the difference value of the temperature of the oil inlet and the temperature of the oil outlet to obtain the temperature difference change rate of the radiator;
and evaluating the heat dissipation capacity of the heat radiator according to the temperature difference change rate.
2. The method for evaluating the heat dissipation capability of the heat sink according to claim 1, wherein the number of the heat sinks includes a plurality of heat sinks, and the heat sinks are all installed on the same side of the transformer, and the same side is a high-voltage side or a low-voltage side;
the heat dissipation capability evaluation method further comprises the following steps: comparing the heat dissipation capacities of the plurality of radiators, and determining the radiator with the worst heat dissipation capacity as a reference sample; and controlling the cooling devices on the same side to work according to the reference sample.
3. The method for evaluating the heat dissipating capability of a heat sink according to claim 2, wherein the controlling the operation of the cooling devices on the same side according to the sample comprises:
and judging whether the temperature rise change rate of the temperature of the oil inlet according to the sample exceeds a first threshold value, and if so, controlling the cooling device to be started.
4. The method for evaluating the heat dissipating ability of a heat sink according to claim 3, wherein the controlling the cooling devices on the same side according to the sample further comprises:
and after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample.
5. The method for evaluating heat dissipation capacity of a heat sink according to claim 4, wherein the controlling the operation of the cooling devices on the same side according to the sample further comprises:
and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
6. The method for evaluating the heat dissipation capability of a heat sink according to claim 2, wherein the evaluating the heat dissipation capability of the heat sink according to the temperature difference change rate comprises:
acquiring the mean value of the temperature difference change rate of each radiator in a preset period;
and comparing the average values of the temperature difference change rates of the radiators, and determining the radiator with the minimum average value as the radiator with the worst heat dissipation capacity.
7. A heat dissipation capability evaluation device of a radiator is characterized by comprising a temperature acquisition unit and a capability evaluation unit;
the temperature acquisition unit is used for acquiring the temperature of an oil inlet and the temperature of an oil outlet of the radiator in real time;
and the capacity evaluation unit is used for calculating the difference value between the oil inlet temperature and the oil outlet temperature, obtaining the temperature difference change rate of the radiator, and evaluating the heat dissipation capacity of the radiator according to the temperature difference change rate.
8. The device for evaluating the heat dissipation capability of a heat sink according to claim 7, wherein the number of the heat sinks includes a plurality of heat sinks, and the heat sinks are all installed on the same side of the transformer, and the same side is a high-voltage side or a low-voltage side;
the heat dissipation capacity evaluation device also comprises a cooling control unit which is used for comparing the heat dissipation capacities of the plurality of radiators, determining the radiator with the worst heat dissipation capacity as a reference sample, and controlling the cooling device on the same side to work according to the reference sample.
9. The device for evaluating heat dissipation capability of a heat sink according to claim 8, wherein the cooling control unit is specifically configured to:
judging whether the temperature rise change rate according to the temperature of the oil inlet of the sample exceeds a first threshold value or not, and if so, controlling the cooling device to be started;
after the cooling device is started, controlling the spraying amount of the cooling device according to the temperature difference change rate of the sample;
and when the temperature rise change rate according to the temperature of the oil inlet of the sample is reduced to a second threshold value and the temperature difference change rate according to the sample is increased to a third threshold value, controlling the cooling device to be closed.
10. A storage medium storing instructions adapted to be loaded by a processor to perform the steps of the method of any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011001225.0A CN112098133A (en) | 2020-09-22 | 2020-09-22 | Method and device for evaluating heat dissipation capacity of heat radiator and storage medium |
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| CN202011001225.0A CN112098133A (en) | 2020-09-22 | 2020-09-22 | Method and device for evaluating heat dissipation capacity of heat radiator and storage medium |
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- 2020-09-22 CN CN202011001225.0A patent/CN112098133A/en active Pending
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| CN102890002A (en) * | 2012-09-24 | 2013-01-23 | 三一重机有限公司 | Engineering machine and fault detecting device for hydraulic oil radiator |
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