CN108205339B - Thermal resistance monitoring method and device for cold plate - Google Patents
Thermal resistance monitoring method and device for cold plate Download PDFInfo
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- CN108205339B CN108205339B CN201611188491.2A CN201611188491A CN108205339B CN 108205339 B CN108205339 B CN 108205339B CN 201611188491 A CN201611188491 A CN 201611188491A CN 108205339 B CN108205339 B CN 108205339B
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
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Abstract
The invention provides a thermal resistance monitoring method and a thermal resistance monitoring device for a cold plate, wherein the method comprises the following steps: when the cold plate is determined to enter thermal balance, acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; and if the difference value is larger than the preset difference value, determining that the cold plate is overheated. Therefore, the thermal resistance of the cold plate can be monitored in real time, when the cold plate is overheated is determined, an alarm can be given when the thermal resistance reaches the boundary where the fault is reported to cause the over-temperature of the device, the technical personnel can further maintain and clean the cold plate to prevent the over-temperature fault of the cold plate from being reported, the safe operation of the power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a thermal resistance monitoring method and device for a cold plate.
Background
The wind generating set is an important tool for collecting wind energy and converting the wind energy into electric energy. Devices in a wind turbine generator system, such as Insulated Gate Bipolar Transistors (IGBT) of a current transformer, need to dissipate heat.
In the prior art, the mode of water cooling is adopted, a power device needing heat dissipation is tightly attached to a cold plate by adopting heat-conducting silicone grease, the device conducts heat to the cold plate, then the heat conducted from the device on the surface of the cold plate is taken away by the inside of the cold plate through water circulation, and then the temperature of the device needing heat dissipation is within the range of safe temperature, so that the reliability of the device is ensured.
However, in the prior art, the cold plate is made of aluminum alloy, and after the interior of the cold plate and the cooling liquid are subjected to chemical corrosion reaction, the heat dissipation efficiency of the cold plate is reduced, and meanwhile, the thermal resistance is increased. When the thermal resistance is increased to a certain value, the surface temperature of the cold plate is increased, so that the surface temperature of the cold plate exceeds the standard, and further, the temperature of a device tightly attached to the surface of the cold plate exceeds the standard, so that the safe operation of the device needing heat dissipation is influenced, and the normal operation of the wind generating set is influenced.
Disclosure of Invention
The invention provides a method and a device for monitoring thermal resistance of a cold plate, which are used for solving the problems that in the prior art, when the thermal resistance is increased to a certain value, the surface temperature of the cold plate is increased, the surface temperature of the cold plate is enabled to exceed the standard, and further, the temperature of a device tightly attached to the surface of the cold plate exceeds the standard, so that the safe operation of a heat dissipation device is influenced, and the normal operation of a wind generating set is influenced.
One aspect of the present invention provides a method for monitoring thermal resistance of a cold plate, comprising:
when the cold plate is determined to enter thermal balance, acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not;
and if the difference value is larger than the preset difference value, determining that the cold plate is overheated.
Another aspect of the present invention is to provide a thermal resistance monitoring apparatus of a cold plate, comprising:
the acquisition module is used for acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate when the cold plate is determined to enter the thermal balance;
the determining module is used for determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
the judging module is used for judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not;
and the monitoring module is used for determining that the cold plate is overheated if the difference is larger than a preset difference.
The invention has the technical effects that: when the cold plate is determined to enter thermal balance, acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; and if the difference value is larger than the preset difference value, determining that the cold plate is overheated. Therefore, the thermal resistance of the cold plate can be monitored in real time, and when the cold plate is overheated, an alarm can be given when the thermal resistance reaches the boundary of reporting the fault and the device is about to overheat, so that technicians can further maintain and clean the cold plate to prevent the reporting of the over-temperature fault of the cold plate, the safe operation of a power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured; the scheme can detect the thermal resistance of the cold plate only by operating the power device of the wind generating set, and is not limited by the power of the wind generating set.
Drawings
Fig. 1 is a flowchart of a method for monitoring thermal resistance of a cold plate according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for monitoring thermal resistance of a cold plate according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a thermal resistance monitoring apparatus of a cold plate according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a thermal resistance monitoring apparatus of a cold plate according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Fig. 1 is a flowchart of a method for monitoring thermal resistance of a cold plate according to an embodiment of the present invention, as shown in fig. 1, the method according to the embodiment includes:
In the present embodiment, in particularDetermining the surface temperature T of the cold plate when the cold plate enters thermal equilibriumserfaceCoolant outlet temperature T of cold plateCoolant_outAnd the heat dissipation power Q of the cold plate.
And 102, determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate.
Wherein the real-time thermal resistance of the cold plate is theta (T ═ T)serface-TCoolant_out)*A/Q；TserfaceIs the surface temperature, T, of a cold plateCoolant_outThe temperature of the coolant outlet of the cold plate, Q the heat dissipation power of the cold plate, and A the heat dissipation area of the cold plate.
In the present embodiment, specifically, the surface temperature T of the cold plateserfaceCoolant outlet temperature T of cold plateCoolant_outCalculating the real-time thermal resistance theta (T) of the cold plateserface-TCoolant_out) And A/Q, wherein A is the heat dissipation area of the cold plate.
And 103, judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not.
In this embodiment, specifically, the real-time thermal resistance of the cold plate is compared with a preset thermal resistance threshold, a difference between the real-time thermal resistance of the cold plate and the preset thermal resistance threshold may be calculated, and then it is determined whether the difference is greater than the preset difference.
And 104, if the difference value is larger than the preset difference value, determining that the cold plate is overheated.
In this embodiment, specifically, if the difference between the real-time thermal resistance of the cold plate and the preset thermal resistance threshold is greater than the preset difference, a certain proportion value of the real-time thermal resistance of the cold plate exceeding the preset thermal resistance threshold may be determined, so that the overheating of the cold plate may be determined.
In the embodiment, when the cold plate is determined to enter the thermal balance, the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate are obtained; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; and if the difference value is larger than the preset difference value, determining that the cold plate is overheated. Therefore, the thermal resistance of the cold plate can be monitored in real time, and when the cold plate is overheated, an alarm can be given when the thermal resistance reaches the boundary of reporting the fault and the device is about to overheat, so that technicians can further maintain and clean the cold plate to prevent the reporting of the over-temperature fault of the cold plate, the safe operation of a power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured; the scheme can detect the thermal resistance of the cold plate only by operating the power device of the wind generating set, and is not limited by the power of the wind generating set.
Fig. 2 is a flowchart of a method for monitoring thermal resistance of a cold plate according to a second embodiment of the present invention, where on the basis of the first embodiment, as shown in fig. 2, the method according to this embodiment further includes, before step 101:
In this embodiment, specifically, before step 101, cold plate parameters of the cold plate are first acquired, and it is determined whether the cold plate enters thermal equilibrium according to the cold plate parameters; when it is determined that the cold plate enters thermal equilibrium, step 101 is performed, and the process of calculating the thermal resistance is started.
Specifically, power devices are arranged on the cold plate, and the power devices are power devices of a current transformer of the wind generating set; the heating power of a power device on the cold plate within a first preset duration time can be acquired, whether the heating power is within a preset constant power interval range or not is judged, if the heating power is within the preset constant power interval range, the cold plate can be determined to enter thermal balance, then a flow for calculating thermal resistance is started, and then the subsequent steps are executed. Or acquiring the temperature of the cold plate, judging whether the temperature change of the temperature of the cold plate within a second preset duration is less than a preset temperature, wherein the preset temperature can be 1 ℃, if the temperature change of the temperature of the cold plate within the second preset duration is less than the preset temperature of 1 ℃, determining that the cold plate enters thermal balance, and then starting a flow for calculating thermal resistance, namely executing subsequent steps.
In this embodiment, specifically, the surface temperature of the cold plate and the coolant outlet temperature are obtained when it is determined that the cold plate enters thermal equilibrium. Specifically, a temperature sensor is arranged on the surface of the cold plate, and then the temperature sensor is used for measuring the surface temperature of the cold plate and the outlet temperature of the cooling liquid of the cold plate; and then the surface temperature of the cold plate and the outlet temperature of the cooling liquid are obtained.
In this embodiment, specifically, some power devices are disposed on the cold plate, and the power devices are power devices of a converter of the wind turbine generator system. The working parameters of the power device on the cold plate can be obtained, and the working parameters can be power, current, voltage and the like; then, calculating the power loss of the power device according to the working parameters of the power device; and then calculating the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
For example, the working parameters of the power device on the cold plate may need to be obtained, where the power device may be an IGBT of a converter of a wind turbine generator system, and the working parameters may be voltage, current, working frequency, switching frequency, and other working parameters of the IGBT; and then calculating the power loss of the power device according to the working parameters, and calculating the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
For example, the power loss of the IGBT may be calculated or simulated in advance according to the current and voltage signals of the IGBT on the cold plate monitored by the current sensor and the voltage sensor, and then according to the predicted switching frequency, voltage and current frequency information. By analogy, different combinations of operating parameters of the IGBT and corresponding different power losses can be obtained. Thereby obtaining the corresponding relation between the working parameters of the IGBT and the power loss. And storing the corresponding relation between the working parameters of the IGBT and the power loss in a table, and determining the power loss M of the IGBT corresponding to the current working parameters of the IGBT according to the corresponding relation between the working parameters of the IGBT and the power loss in the actual operation process. And calculating the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
For another example, when other capacitor devices are attached to the cold plate, the power loss of the capacitor device may be calculated or simulated in advance by the similar method, so as to obtain the corresponding relationship between the operating parameter of the capacitor device and the power loss. And storing the corresponding relation between the working parameters of the capacitor device and the power loss in a table, and determining the power loss M of the capacitor device corresponding to the current working parameters of the capacitor device according to the corresponding relation between the working parameters of the capacitor device and the power loss in the actual operation process. And calculating the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
After step 102, further comprising:
In this embodiment, specifically, the real-time thermal resistance of the cold plate is sent to the central monitoring system, so that the central monitoring system stores the real-time thermal resistance of the cold plate, thereby preventing the occurrence of the over-temperature fault before the cold plate sends out the over-temperature fault alarm, and maintaining the data of the real-time thermal resistance. Specifically, the real-time thermal resistance of the cold plate is sent to a central monitoring system through a communication network, so that the central monitoring system stores the real-time thermal resistance of the cold plate; the central monitoring system can screen and pre-maintain the real-time thermal resistance of the cold plate, so that the over-temperature fault can be prevented before the cold plate sends out an over-temperature fault alarm.
After step 104, further comprising:
and step 203, generating and sending alarm information.
In this embodiment, specifically, after it is determined that the cold plate is overheated, an alarm message may be generated and then sent out. The alarm information may include new whistling information, light information, or a warning message sent to a technician user through another platform or device; thereby alerting the technician to the cold plate's excessive thermal resistance.
In the embodiment, when the cold plate is determined to enter the thermal balance according to the heating power of the power device on the cold plate within the first preset duration time or the cold plate temperature of the cold plate, the surface temperature of the cold plate, the coolant outlet temperature of the cold plate, and the heat dissipation power of the cold plate are obtained; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; if the difference value is larger than the preset difference value, determining that the cold plate is overheated; generating and sending alarm information; and sending the real-time thermal resistance of the cold plate to a central monitoring system so that the central monitoring system stores the real-time thermal resistance of the cold plate to maintain the data of the real-time thermal resistance. Therefore, the thermal resistance of the cold plate can be monitored in real time, and an alarm is given when the thermal resistance reaches the boundary of the reported fault and is about to cause the over-temperature of the device, so that technicians can maintain and clean the cold plate to prevent the report of the over-temperature fault of the cold plate, the safe operation of the power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured; the scheme can detect the thermal resistance of the cold plate only by operating the power device of the wind generating set, and is not limited by the power of the wind generating set. And the real-time thermal resistance of the cold plate is stored in the central monitoring system, so that the central monitoring system can screen data conveniently, and maintenance planning of the cold plate can be performed conveniently.
Fig. 3 is a schematic structural diagram of a thermal resistance monitoring apparatus of a cold plate according to a third embodiment of the present invention, as shown in fig. 3, the apparatus of the present embodiment includes:
the acquiring module 31 is configured to acquire a surface temperature of the cold plate, a coolant outlet temperature of the cold plate, and a heat dissipation power of the cold plate when it is determined that the cold plate enters thermal equilibrium;
the determining module 32 is configured to determine the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the temperature of the coolant outlet of the cold plate, and the heat dissipation power of the cold plate;
wherein the real-time thermal resistance of the cold plate is theta (T ═ T)serface-TCoolant_out)*A/Q；TserfaceIs the surface temperature, T, of a cold plateCoolant_outThe temperature of the coolant outlet of the cold plate, Q the heat dissipation power of the cold plate, and A the heat dissipation area of the cold plate.
The judging module 33 is configured to judge whether a difference between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold is greater than a preset difference;
and the monitoring module 34 is used for determining that the cold plate is overheated if the difference is larger than a preset difference.
The thermal resistance monitoring apparatus for a cold plate provided in this embodiment may perform the thermal resistance monitoring method for a cold plate provided in the first embodiment of the present invention, which is similar to the first embodiment, and will not be described herein again.
In the embodiment, when the cold plate is determined to enter the thermal balance, the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate are obtained; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; and if the difference value is larger than the preset difference value, determining that the cold plate is overheated. Therefore, the thermal resistance of the cold plate can be monitored in real time, so that an alarm can be given when the thermal resistance reaches the boundary of reporting the fault and the device is about to cause over-temperature, a technician can further maintain and clean the cold plate to prevent the reporting of the over-temperature fault of the cold plate, the safe operation of a power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured; the scheme can detect the thermal resistance of the cold plate only by operating the power device of the wind generating set, and is not limited by the power of the wind generating set.
Fig. 4 is a schematic structural diagram of a thermal resistance monitoring apparatus of a cold plate according to a fourth embodiment of the present invention, where on the basis of the third embodiment, as shown in fig. 4, the apparatus of the present embodiment further includes:
an analysis module 41, configured to, before the obtaining module 31 obtains the surface temperature of the cold plate, the coolant outlet temperature of the cold plate, and the heat dissipation power of the cold plate when determining that the cold plate enters the thermal equilibrium,
the method comprises the steps of obtaining heating power of a power device on a cold plate within a first preset duration, judging whether the heating power is within a preset constant power interval range, and if the heating power is within the preset constant power interval range, determining that the cold plate enters thermal balance, wherein the power device is a power device of a converter of the wind generating set; or acquiring the temperature of the cold plate, judging whether the temperature change of the temperature of the cold plate in a second preset duration is less than a preset temperature, and if the temperature change is less than the preset temperature, determining that the cold plate enters thermal balance.
An acquisition module 31, comprising:
the obtaining submodule 311 is configured to obtain working parameters of a power device on the cold plate, and determine power loss of the power device according to the working parameters, where the power device is a power device of a converter of the wind turbine generator system; and determining the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
The apparatus provided in this embodiment further includes:
an alarm module 42 for generating and sending an alarm message after the monitoring module 34 determines that the cold plate is overheated.
And the sending module 43 is configured to send the real-time thermal resistance of the cold plate to the central monitoring system after the determining module 32 determines the real-time thermal resistance of the cold plate, so that the central monitoring system stores the real-time thermal resistance of the cold plate, and maintains data of the real-time thermal resistance.
The thermal resistance monitoring apparatus for a cold plate provided in this embodiment may perform the thermal resistance monitoring method for a cold plate provided in the second embodiment of the present invention, which is similar to the first embodiment and will not be described herein again.
In the embodiment, when the cold plate is determined to enter the thermal balance according to the heating power of the power device on the cold plate within the first preset duration time or the cold plate temperature of the cold plate, the surface temperature of the cold plate, the coolant outlet temperature of the cold plate, and the heat dissipation power of the cold plate are obtained; determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate; judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not; if the difference value is larger than the preset difference value, determining that the cold plate is overheated; generating and sending alarm information; and sending the real-time thermal resistance of the cold plate to a central monitoring system so that the central monitoring system stores the real-time thermal resistance of the cold plate to maintain the data of the real-time thermal resistance. Therefore, the thermal resistance of the cold plate can be monitored in real time, and an alarm is given when the thermal resistance reaches the boundary of the reported fault and is about to cause the over-temperature of the device, so that technicians can maintain and clean the cold plate to prevent the report of the over-temperature fault of the cold plate, the safe operation of the power device needing heat dissipation on the cold plate is ensured, and the normal operation of the wind generating set is further ensured; the scheme can detect the thermal resistance of the cold plate only by operating the power device of the wind generating set, and is not limited by the power of the wind generating set. And the real-time thermal resistance of the cold plate is stored in the central monitoring system, so that the central monitoring system can screen data conveniently, and maintenance planning of the cold plate can be performed conveniently.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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 (9)
1. A method of monitoring thermal resistance of a cold plate, comprising:
when the cold plate is determined to enter thermal balance, acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not;
if the difference value is larger than the preset difference value, determining that the cold plate is overheated;
wherein, when it is determined that the cold plate enters thermal equilibrium, before acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate, and the heat dissipation power of the cold plate, the method further comprises:
the method comprises the steps of obtaining heating power of a power device on a cold plate within a first preset duration, judging whether the heating power is within a preset constant power interval range, and if the heating power is within the preset constant power interval range, determining that the cold plate enters thermal balance, wherein the power device is a power device of a converter of the wind generating set;
or acquiring the temperature of the cold plate, judging whether the temperature change of the temperature of the cold plate in a second preset duration is less than a preset temperature, and if the temperature change is less than the preset temperature, determining that the cold plate enters thermal balance.
2. The method of claim 1, wherein the cold plate has a real-time thermal resistance θ ═ T (T ═ T)serface-TCoolant_out)*A/Q；
Wherein, TserfaceIs the surface temperature, T, of a cold plateCoolant_outThe temperature of the coolant outlet of the cold plate, Q the heat dissipation power of the cold plate, and A the heat dissipation area of the cold plate.
3. The method of claim 1, wherein obtaining the thermal dissipation power of the cold plate comprises:
obtaining working parameters of a power device on a cold plate, and determining power loss of the power device according to the working parameters, wherein the power device is a power device of a converter of a wind generating set;
and determining the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
4. The method according to any one of claims 1-3, further comprising, after determining that the cold plate is overheated: generating and sending alarm information;
or/and the light source is arranged in the light path,
after the determining the real-time thermal resistance of the cold plate, the method further comprises:
and sending the real-time thermal resistance of the cold plate to a central monitoring system so that the central monitoring system stores the real-time thermal resistance of the cold plate to maintain the data of the real-time thermal resistance.
5. A thermal resistance monitoring device for a cold plate, comprising:
the acquisition module is used for acquiring the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate when the cold plate is determined to enter the thermal balance;
the determining module is used for determining the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate and the heat dissipation power of the cold plate;
the judging module is used for judging whether the difference value between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold value is larger than a preset difference value or not;
the monitoring module is used for determining that the cold plate is overheated if the difference value is larger than a preset difference value;
the analysis module is used for obtaining heating power of a power device on a cold plate within a first preset duration time, judging whether the heating power is within a preset constant power interval range, and if the heating power is within the preset constant power interval range, determining that the cold plate enters thermal balance, wherein the power device is a power device of a converter of a wind generating set; or acquiring the temperature of the cold plate, judging whether the temperature change of the temperature of the cold plate in a second preset duration is less than a preset temperature, and if the temperature change is less than the preset temperature, determining that the cold plate enters thermal balance.
6. The apparatus of claim 5, wherein the cold plate has a real-time thermal resistance θ ═ T (T ═ T)serface-TCoolant_out)*A/Q；
Wherein, TserfaceIs the surface temperature, T, of a cold plateCoolant_outThe temperature of the coolant outlet of the cold plate, Q the heat dissipation power of the cold plate, and A the heat dissipation area of the cold plate.
7. The apparatus of claim 5, further comprising:
the acquisition module includes: the acquisition submodule is used for acquiring working parameters of a power device on the cold plate and determining power loss of the power device according to the working parameters, wherein the power device is a power device of a converter of the wind generating set; and determining the heat dissipation power Q of the cold plate as M X according to the power loss M, wherein X is a preset calculation parameter.
8. The apparatus of any one of claims 5-7, further comprising:
and the alarm module is used for generating and sending alarm information after the monitoring module determines that the cold plate is overheated.
9. The apparatus of claim 8, further comprising:
and the sending module is used for sending the real-time thermal resistance of the cold plate to the central monitoring system after the determining module determines the real-time thermal resistance of the cold plate, so that the central monitoring system stores the real-time thermal resistance of the cold plate, and the data of the real-time thermal resistance is maintained.
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| CN201611188491.2A CN108205339B (en) | 2016-12-20 | 2016-12-20 | Thermal resistance monitoring method and device for cold plate |
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| CN201611188491.2A CN108205339B (en) | 2016-12-20 | 2016-12-20 | Thermal resistance monitoring method and device for cold plate |
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| CN108205339B true CN108205339B (en) | 2021-01-26 |
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| CN108957276A (en) * | 2018-06-29 | 2018-12-07 | 西安翌飞核能装备股份有限公司 | Semiconductor power device guard method and circuit based on integrated thermal electric resistance |
| CN109682621A (en) * | 2018-12-13 | 2019-04-26 | 北京金风科创风电设备有限公司 | Fault detection method, device and system for heat dissipation device of power module |
| CN109858107A (en) * | 2019-01-14 | 2019-06-07 | 北京交通大学 | A kind of converter plant radiator chocking-up degree appraisal procedure and device |
| CN114968730B (en) * | 2022-08-02 | 2022-11-04 | 深圳比特微电子科技有限公司 | Method and device for determining temperature of cooling liquid, block chain server and storage medium |
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| CN102374878B (en) * | 2011-07-26 | 2016-02-24 | 中国北方车辆研究所 | A kind of cold plate performance test device |
| CN202918178U (en) * | 2012-10-23 | 2013-05-01 | 浙江海得新能源有限公司 | High-power converter cooling system |
| CN104582426B (en) * | 2013-10-28 | 2017-09-12 | 联合汽车电子有限公司 | Utilize the method for testing of the thermo-resistance measurement system with modularization radiating source device |
| CN104950009B (en) * | 2014-03-28 | 2018-11-20 | 杭州远方光电信息股份有限公司 | A kind of thermal resistance analysis method |
| JP6365370B2 (en) * | 2015-03-25 | 2018-08-01 | 三菱電機株式会社 | Cold plate |
| CN105916357B (en) * | 2016-06-07 | 2019-04-05 | 西安特锐德智能充电科技有限公司 | A kind of power supply heat sinking device and method based on cold plate |
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