CN118042789A - Low-voltage bus-bar cabinet heat dissipation control method and related equipment - Google Patents
Low-voltage bus-bar cabinet heat dissipation control method and related equipment Download PDFInfo
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- CN118042789A CN118042789A CN202410175522.9A CN202410175522A CN118042789A CN 118042789 A CN118042789 A CN 118042789A CN 202410175522 A CN202410175522 A CN 202410175522A CN 118042789 A CN118042789 A CN 118042789A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 111
- 229910052802 copper Inorganic materials 0.000 claims abstract description 111
- 239000010949 copper Substances 0.000 claims abstract description 111
- 238000005070 sampling Methods 0.000 claims description 25
- 230000005855 radiation Effects 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims 2
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000013021 overheating Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention provides a heat dissipation control method of a low-voltage bus-bar cabinet and related equipment, wherein the heat dissipation control method comprises the steps of obtaining the temperature of a bus-bar total copper bar in the low-voltage bus-bar cabinet and target parameters of at least one branch, and starting the heat dissipation equipment in the low-voltage bus-bar cabinet under the condition that the temperature of the bus-bar total copper bar reaches a preset heat dissipation equipment starting temperature and/or the target parameters of at least one branch reach a preset heat dissipation equipment starting threshold value, so that the heat dissipation equipment can be started when the temperature of a whole machine is too high, and the heat dissipation equipment can be started when the temperature of the whole machine is not high but the branches are overheated, thereby ensuring the safe operation of the low-voltage bus-bar cabinet.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a low-voltage bus-bar cabinet heat dissipation control method and related equipment.
Background
The low-voltage bus cabinet is equipment for combining alternating current electric energy output by the multiple inverters into one path in a photovoltaic power generation system.
A fan heat dissipation device is arranged in the low-voltage convergence cabinet, and the start and stop of a fan are generally controlled according to the ambient temperature in the low-voltage convergence cabinet at present. However, the low-voltage convergence cabinet is composed of a plurality of branch protection devices, and under the condition of grid connection initial stage or branch fault, as a plurality of branches are not connected into related equipment, even if the temperature of a single branch exceeds the limit value, the temperature of the whole machine of the low-voltage convergence cabinet can not reach the starting temperature of a fan, so that the condition of single branch thermal fault is caused.
Disclosure of Invention
In view of the above, the invention provides a heat dissipation control method for a low-voltage bus-bar cabinet and related equipment, which not only can start heat dissipation equipment when the temperature of the whole machine is too high, but also can start heat dissipation equipment when the temperature of the whole machine is not high but a branch is overheated, thereby ensuring the safe operation of the low-voltage bus-bar cabinet.
In order to achieve the above purpose, the specific technical scheme provided by the invention is as follows:
In a first aspect, an embodiment of the present invention provides a method for controlling heat dissipation of a low-voltage bus-bar, which is applied to a controller in a low-voltage bus-bar, where the low-voltage bus-bar further includes a heat dissipation device, at least one branch, and a bus-bar total copper bar, at least one branch is connected to the bus-bar total copper bar, and the method for controlling heat dissipation of the low-voltage bus-bar includes:
acquiring the temperature of a total copper busbar in a low-voltage busbar cabinet and target parameters of at least one branch, wherein the target parameters are temperature or current;
And if the temperature of the total bus bar reaches a preset starting temperature of the heat dissipation device and/or the target parameter of at least one branch reaches a preset starting threshold of the heat dissipation device, starting the heat dissipation device in the low-voltage bus cabinet.
In some embodiments, the obtaining the temperature of the total copper busbar and the target parameter of the at least one branch in the low-voltage busbar cabinet includes:
acquiring the temperature of one or more temperature sampling positions on the total bus copper bar;
and if the temperatures of all the temperature sampling positions do not reach the preset starting temperature of the heat radiation equipment, acquiring target parameters of at least one branch.
In some embodiments, the obtaining the target parameter of the at least one branch includes:
judging whether the inverter is offline;
And if the inverter is not offline, acquiring the current of at least one branch in the communication data of the inverter.
In some embodiments, the obtaining the target parameter of the at least one branch includes:
And acquiring the temperature of the temperature sampling position on at least one branch copper bar.
In some embodiments, after activating the heat sink device in the low voltage bus bar, further comprising:
acquiring the temperature of the total bus copper bar and the target parameter of at least one branch;
And if the temperature of the total bus copper bar is smaller than the preset closing temperature of the heat dissipation device and the target parameters of all the branches are smaller than the preset closing threshold value of the heat dissipation device, closing the heat dissipation device.
In some embodiments, further comprising:
If the temperature of the total bus copper bar is not less than the preset closing temperature of the heat dissipation equipment and/or the target parameter of at least one branch is not less than the preset closing threshold of the heat dissipation equipment, judging whether the inverter is offline;
If the inverter is not offline, judging whether the inverter is shut down;
and if the inverter is shut down, closing the heat dissipation device.
In a second aspect, an embodiment of the present invention provides a low-voltage bus-bar heat dissipation control device, which is applied to a controller in a low-voltage bus-bar, where the low-voltage bus-bar further includes a heat dissipation device, at least one branch and a bus total copper bar, at least one branch is connected to the bus total copper bar, and the low-voltage bus-bar heat dissipation control device includes:
The data acquisition unit is used for acquiring the temperature of the total copper busbar in the low-voltage busbar cabinet and the target parameter of at least one branch, wherein the target parameter is temperature or current;
And the heat radiation device control unit is used for starting the heat radiation device in the low-voltage bus cabinet if the temperature of the bus total copper bar reaches a preset heat radiation device starting temperature and/or the target parameter of at least one branch reaches a preset heat radiation device starting threshold.
In a third aspect, an embodiment of the present invention provides a controller, including a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute a low-voltage bus-bar heat dissipation control method according to any implementation manner of the first aspect according to an instruction in the program code.
In a fourth aspect, an embodiment of the present invention provides a low-voltage bus-bar cabinet, including a controller, a data collector, at least one branch, a bus-bar copper, one or more temperature sensors, and a heat dissipating device;
at least one branch is connected to the bus total copper bar;
at least one temperature sensor is used for collecting the temperature of the total copper busbar;
The controller is configured to acquire, by using the data acquisition unit, a temperature of the total copper busbar and a target parameter of at least one branch, and if the temperature of the total copper busbar reaches a preset starting temperature of the heat sink and/or the target parameter of at least one branch reaches a preset starting threshold of the heat sink, start the heat sink, and close the heat sink when the temperature of the total copper busbar is less than a preset closing temperature of the heat sink and the target parameters of all branches are less than a preset closing threshold of the heat sink; the target parameter is temperature or current.
In a fifth aspect, an embodiment of the present invention provides a photovoltaic system, including an inverter and a low-voltage junction box described in any one of the implementation manners of the fourth aspect;
And the alternating current output end of the inverter is connected with the branch of the low-voltage confluence cabinet.
In a sixth aspect, an embodiment of the present invention provides a computer readable storage medium, where a computer program is stored, where the computer program, when executed by a processor, implements a low-voltage bus-bar heat dissipation control method as described in any one of the implementation manners of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
According to the low-voltage bus-bar heat dissipation control method and related equipment, the temperature of the bus-bar total copper bar in the low-voltage bus-bar cabinet and the target parameter of at least one branch are obtained, and when the temperature of the bus-bar total copper bar reaches the preset starting temperature of the heat dissipation equipment and/or the target parameter of at least one branch reaches the preset starting threshold value of the heat dissipation equipment, the heat dissipation equipment in the low-voltage bus-bar cabinet is started, so that the heat dissipation equipment can be started when the temperature of the whole machine is too high, and the heat dissipation equipment can be started when the temperature of the whole machine is not high but the branches are overheated, and the safe operation of the low-voltage bus-bar cabinet is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a heat dissipation control method of a low-voltage bus cabinet according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a low-voltage bus-bar disclosed in an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another heat dissipation control method for a low-voltage bus-bar according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for controlling the start of a heat dissipating device according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for controlling closing of a heat dissipating device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a heat dissipation control device of a low-voltage bus cabinet according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a controller according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The heat dissipation control method of the low-voltage bus cabinet can be realized through a computer program, such as a computer program of a controller arranged in the low-voltage bus cabinet.
Referring to fig. 1, fig. 1 is a flow chart of a low-voltage bus-bar heat dissipation control method according to an embodiment of the invention, which specifically includes the following steps:
s101: acquiring the temperature of a total copper busbar in a low-voltage busbar cabinet and target parameters of at least one branch, wherein the target parameters are temperature or current;
The number of the total copper bars is not limited in this embodiment, and may be one or more. As shown in fig. 2, the low-voltage bus-bar cabinet includes a controller, at least one branch and a bus-bar total copper bar, each branch corresponds to one branch copper bar and a branch protection device, at least one branch is connected to the bus-bar total copper bar, each bus-bar total copper bar corresponds to a total switch, and the temperature of the bus-bar total copper bar represents the temperature of a plurality of connected branches. The low-voltage conflux cabinet also includes cooling equipment, and cooling equipment is used for cooling down to the low-voltage conflux cabinet.
It can be understood that when the current of the branch is too large, the branch is overheated, so that the temperature and the current of the branch can be used for measuring whether the branch is overheated, the temperature or the current of the obtained branch can assist in the control of follow-up heat dissipation equipment, and the temperature and/or the current of the obtained branch can be selected according to actual application scenes.
S102: and if the temperature of the total bus bar reaches a preset starting temperature of the heat dissipation device and/or the target parameter of at least one branch reaches a preset starting threshold of the heat dissipation device, starting the heat dissipation device in the low-voltage bus cabinet.
If the temperature of the total copper bars of the busbar reaches the preset starting temperature of the heat radiation equipment, the whole machine temperature representing the low-voltage busbar cabinet is too high, and the heat radiation equipment needs to be started in order to ensure the safe operation of the low-voltage busbar cabinet.
If the target parameter of at least one branch reaches a preset starting threshold value of the heat radiation equipment, the at least one branch is characterized to be overheated, and the heat radiation equipment is required to be started.
It should be noted that, when the target parameter is temperature, the corresponding heat dissipation device starting threshold is different from the corresponding heat dissipation device starting threshold when the target parameter is current.
It should be further noted that, the temperature of the total copper busbar and the target parameter of at least one branch may be obtained simultaneously, or may be obtained sequentially, whether the temperature of the total copper busbar reaches the preset starting temperature of the heat dissipating device or not and whether the target parameter of at least one branch reaches the preset starting threshold of the heat dissipating device or not may be determined simultaneously, or may be determined sequentially, and the invention is not limited specifically.
And if the temperature of the total bus bar does not reach the preset starting temperature of the heat dissipation device and the target parameters of all the branches do not reach the preset starting threshold value of the heat dissipation device, not starting the heat dissipation device.
The heat dissipation device may be a fan, an air conditioner, or the like, and the present invention is not particularly limited.
Therefore, according to the heat dissipation control method for the low-voltage bus-bar cabinet, through obtaining the temperature of the bus-bar copper in the low-voltage bus-bar cabinet and the target parameter of at least one branch, when the temperature of the bus-bar copper reaches the preset starting temperature of the heat dissipation device and/or the target parameter of at least one branch reaches the preset starting threshold value of the heat dissipation device, the heat dissipation device in the low-voltage bus-bar cabinet is started, so that the heat dissipation device can be started when the temperature of the whole machine is too high, and the heat dissipation device can be started when the temperature of the whole machine is not high but the branches are overheated, and the safe operation of the low-voltage bus-bar cabinet is ensured.
It can be understood that if the temperature of the total bus bar is greater than the preset starting temperature of the heat dissipating device, at least one branch is characterized as overheated, based on this, in order to reduce unnecessary data acquisition and analysis, the heat dissipating control method for the low-voltage bus cabinet provided by the embodiment firstly obtains the temperature of the total bus bar, and if the temperature of the total bus bar reaches the preset starting temperature of the heat dissipating device, the heat dissipating device is directly started; if the temperature of the total bus bar does not reach the preset starting temperature of the heat dissipation equipment, acquiring target parameters of at least one branch, and judging whether the conditions of low temperature of the whole machine and overheating of the branch exist or not.
When the temperature of the total copper bar is acquired, the temperature of the total copper bar can be acquired through a temperature sensor, specifically, one or more temperature sampling positions are arranged on the total copper bar, the temperature sampling positions correspond to the temperature sensors one by one, and the temperature of the corresponding temperature sampling positions is acquired through the temperature sensors. In a certain range, the more the temperature sampling positions are, the more the temperature of the total copper busbar can be accurately reflected.
Since there may be two kinds of target parameters, there may be two corresponding ways of obtaining the target parameters of at least one branch.
If the target parameter is current, judging whether the inverter is offline, if the inverter is offline, returning to execute the acquisition of the temperature of the total bus copper bar, and if the inverter is not offline, acquiring the current of at least one branch in the communication data of the inverter.
And if the target parameter is the temperature, acquiring the temperature of the temperature sampling position on the branch copper bar corresponding to at least one branch as the temperature of the corresponding branch, wherein each temperature sampling position corresponds to one temperature sensor and is used for acquiring the temperature of the corresponding temperature sampling position.
Corresponding to the above-mentioned heat dissipating device start control, the embodiment of the present invention further provides a heat dissipating device closing control method, referring to fig. 3, after starting the heat dissipating device in the low-voltage bus cabinet, further comprising the following steps:
s201: acquiring the temperature of the total copper busbar and target parameters of at least one branch;
S202: and if the temperature of the total bus copper bar is smaller than the preset closing temperature of the heat dissipation device and the target parameters of all the branches are smaller than the preset closing threshold value of the heat dissipation device, closing the heat dissipation device.
The temperature of the total bus bar and the target parameter of at least one branch circuit can be obtained simultaneously or sequentially, whether the temperature of the total bus bar is smaller than the preset closing temperature of the heat dissipation device or not and whether the target parameters of all branch circuits are smaller than the preset closing threshold of the heat dissipation device or not can be judged simultaneously or sequentially, and the invention is not limited in particular.
It can be understood that if the temperature of the total copper busbar is not less than the preset closing temperature of the heat dissipating device, the heat dissipating device cannot be closed, and in order to reduce unnecessary data collection and analysis, as a preferred implementation manner, if the temperature of the total copper busbar is not less than the preset closing temperature of the heat dissipating device, the target parameter of at least one branch is not obtained any more, and only when the temperature of the total copper busbar is less than the preset closing temperature of the heat dissipating device, the target parameter of at least one branch is obtained, thereby judging whether the situation that the temperature of the whole machine is not high but the branch still needs to be cooled exists.
In the closing control process of the heat dissipation device, the specific implementation manner of acquiring the temperature of the total copper busbar and the target parameter of at least one branch is consistent with the specific implementation manner of acquiring the temperature of the total copper busbar and the target parameter of at least one branch in the starting control of the heat dissipation device, and is not repeated here.
In addition, considering that if the inverter is turned off, the branches are turned off, even if the temperature of the bus bar is not less than the preset heat sink shutdown temperature or the target parameter of at least one branch is not less than the preset heat sink shutdown threshold, the temperature of the branches gradually decreases due to the power off of the branches, and heat dissipation is not required, so that the heat sink needs to be turned off in this case.
Specifically, if the temperature of the total bus copper bar is not less than the preset closing temperature of the heat dissipation device and/or the target parameter of at least one branch is not less than the preset closing threshold of the heat dissipation device, judging whether the inverter is offline; if the inverter is offline, returning to execute the judgment of whether the temperature of the total bus bar is not less than the preset closing temperature of the heat dissipation device and/or whether the target parameter of at least one branch is not less than the preset closing threshold of the heat dissipation device; if the inverter is not offline, judging whether the inverter is shut down; if the inverter is not powered off, returning to execute the judgment whether the temperature of the total bus bar is not less than the preset cooling equipment closing temperature and/or whether the target parameter of at least one branch is not less than the preset cooling equipment closing threshold; and if the inverter is shut down, the heat dissipation device is turned off.
Taking the example that the low-voltage bus-bar cabinet comprises two bus-bar copper bars, the temperature sensor PT100-1 collects the temperature of the bus-bar copper bars 1, and the temperature sensor PT100-2 collects the temperature of the bus-bar copper bars 2.
As shown in the flow chart of the starting control method of the heat dissipating device in fig. 4, the heat dissipating device is a fan, firstly, the temperature of the total copper busbar 1 collected by the PT100-1 is judged, if the preset starting temperature is reached, the fan is started, if the temperature of the total copper busbar 1 does not reach the preset starting temperature, the temperature of the total copper busbar 2 collected by the PT100-2 is judged, and if the preset starting temperature is reached, the fan is started; if the temperatures of the total copper bars collected by the two groups of PT100 do not reach the preset starting temperature, judging whether the inverter is offline, if so, judging the temperature of the total copper bar 1 collected by the PT100-1 again, if not, judging whether the maximum current of a branch in communication data of the inverter is larger than the fan starting current, if so, starting the fan, otherwise, not starting the fan.
If more than two groups of PT100 are connected, the temperature of the total copper bar 1 collected by the PT100-1 is judged at first, and if the temperature reaches the preset starting temperature, the fan is started; if the temperature of the total copper busbar 1 collected by the PT100-1 does not reach the preset starting temperature, judging the temperature of the total copper busbar 2 collected by the PT100-2, and if the temperature reaches the preset starting temperature, starting the fan; if the temperatures of the total copper busbar 1 and the total copper busbar 2 do not reach the preset starting temperature, judging whether the temperature of the total copper busbar collected by the PT100-3 reaches the preset starting temperature, starting the fan if the temperature reaches the preset starting temperature, and continuously judging the temperature of the next group of total copper busbar if the temperature does not reach the preset starting temperature. If the temperature of all the total copper bars does not reach the preset starting temperature, judging whether the inverter is offline, if so, judging the temperature of the total copper bar 1 collected by the PT100-1 again, if not, judging whether the maximum current of a branch in communication data of the inverter is larger than the fan starting current, if so, starting the fan, otherwise, not starting the fan.
As shown in the flow chart of the heat dissipation device shutdown control method shown in fig. 5, taking a heat dissipation device as an example of a fan, firstly determining the temperature of the total copper busbar 1 collected by the PT100-1, if the temperature is smaller than the preset fan shutdown temperature, determining the temperature of the total copper busbar 2 collected by the PT100-2, if the temperature is also smaller than the preset fan shutdown temperature, determining whether the inverter is offline, if the inverter is offline, closing the fan, if the inverter is not offline, determining whether the branch maximum current in the communication data of the inverter is smaller than the preset fan shutdown current, and if the branch maximum current is smaller than the preset fan shutdown current, closing the fan. If the temperature of the total copper busbar 1 is not less than the preset fan closing temperature or the temperature of the total copper busbar 2 is not less than the preset fan closing temperature or the maximum current of the branch is not less than the preset fan closing current, judging whether the inverter is offline, if the inverter is offline, judging whether the temperature of the total copper busbar 1 collected by the PT100-1 is again judged, if the inverter is not offline, judging whether the inverter is shut down, if so, closing the fan, and in order to avoid overheating of the branch caused by the fact that the fan is closed just after the inverter is shut down, closing the fan after judging that the inverter is shut down for a first preset time, for example, setting the first preset time to be 20 minutes.
If more than two groups of PTs 100 are connected, the method for controlling the closing of the heat sink is the same as the method for controlling the closing of the heat sink shown in fig. 5, and will not be described again here.
In order to avoid the problem that the inverter needs to be frequently judged whether to be offline when judging whether the inverter is offline or not, the inverter is specifically judged whether to be offline or not for a second preset time when judging whether the inverter is offline, and the inverter is judged to be offline if the inverter is offline for the second preset time, for example, the second preset time is set to 10 minutes.
Further, before judging the temperatures of the total copper busbar 1 and the total copper busbar 2, it is also required to judge whether the temperature points of the total copper busbar 1 and the total copper busbar 2 are connected, that is, whether the PT100-1 and the PT100-2 are connected, specifically, whether the data acquisition device can normally acquire the temperature data acquired by the PT100-1 and the PT100-2 can be judged, and if the temperature data acquired by the PT100-1 and the PT100-2 can normally acquire the temperature data, the corresponding temperature points are judged to be connected.
Based on the foregoing embodiment, the embodiment correspondingly discloses a low-voltage bus-bar heat dissipation control device, please refer to fig. 6, which includes:
The data acquisition unit 601 is configured to acquire a temperature of a total copper busbar in the low-voltage busbar cabinet and a target parameter of at least one branch, where the target parameter is temperature or current;
And the heat dissipating device control unit 602 is configured to start the heat dissipating device in the low-voltage bus cabinet if the temperature of the bus total copper bar reaches a preset heat dissipating device start temperature and/or the target parameter of at least one branch reaches a preset heat dissipating device start threshold.
In some embodiments, the data obtaining unit 601 is specifically configured to obtain a temperature of one or more temperature sampling positions on the total copper busbar; and if the temperatures of all the temperature sampling positions do not reach the preset starting temperature of the heat radiation equipment, acquiring target parameters of at least one branch.
In some embodiments, the data obtaining unit 601 is specifically configured to obtain a temperature of one or more temperature sampling positions on the total copper busbar; if the temperatures of all the temperature sampling positions do not reach the preset starting temperature of the heat radiation equipment, judging whether the inverter is offline; and if the inverter is not offline, acquiring the current of at least one branch in the communication data of the inverter.
In some embodiments, the data obtaining unit 601 is specifically configured to obtain a temperature of one or more temperature sampling positions on the total copper busbar; and if the temperatures of all the temperature sampling positions do not reach the preset starting temperature of the heat radiation equipment, acquiring the temperature of the temperature sampling position on at least one branch copper bar.
In some embodiments, the heat dissipating device control unit 602 is further configured to, after starting the heat dissipating device in the low-voltage bus bar, turn off the heat dissipating device if the temperature of the bus bar is less than a preset heat dissipating device turn-off temperature and the target parameters of all the branches are less than a preset heat dissipating device turn-off threshold.
In some embodiments, the heat dissipating device control unit 602 is further configured to determine, after the heat dissipating device in the low-voltage bus bar is started, whether the inverter is offline if the temperature of the bus bar is not less than a preset heat dissipating device shutdown temperature and/or the target parameter of at least one branch is not less than a preset heat dissipating device shutdown threshold; if the inverter is not offline, judging whether the inverter is shut down; and if the inverter is shut down, closing the heat dissipation device.
According to the heat dissipation control device for the low-voltage bus-bar cabinet, through obtaining the temperature of the bus-bar copper bar in the low-voltage bus-bar cabinet and the target parameter of at least one branch, when the temperature of the bus-bar copper bar reaches the preset starting temperature of the heat dissipation device and/or the target parameter of at least one branch reaches the preset starting threshold value of the heat dissipation device, the heat dissipation device in the low-voltage bus-bar cabinet is started, so that the heat dissipation device can be started when the temperature of the whole machine is too high, the heat dissipation device can be started when the temperature of the whole machine is not high but the branches are overheated, and the safe operation of the low-voltage bus-bar cabinet is ensured.
The embodiment of the present invention further provides a controller, referring to fig. 7, for example, including a processor 701 and a memory 702, where the processor 701 and the memory 702 communicate through a bus;
The memory 702 is used for storing program codes and transmitting the program codes to the processor 701;
the processor is configured to execute a low-voltage bus-bar heat dissipation control method described in any one of the foregoing embodiments according to an instruction in the program code.
The embodiment of the invention also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the computer program realizes the low-voltage bus cabinet heat dissipation control method described in any one of the above embodiments.
The embodiment of the invention also provides a low-voltage bus-bar cabinet which comprises a controller, a data collector, at least one branch, a bus-bar copper bar, one or more temperature sensors and heat dissipation equipment;
at least one branch is connected to the bus total copper bar;
at least one temperature sensor is used for collecting the temperature of the total copper busbar;
The controller is configured to acquire, by using the data acquisition unit, a temperature of the total copper busbar and a target parameter of at least one branch, and if the temperature of the total copper busbar reaches a preset starting temperature of the heat sink and/or the target parameter of at least one branch reaches a preset starting threshold of the heat sink, start the heat sink, and close the heat sink when the temperature of the total copper busbar is less than a preset closing temperature of the heat sink and the target parameters of all branches are less than a preset closing threshold of the heat sink; the target parameter is temperature or current.
It should be noted that, in this embodiment, all the temperature sensors are not limited to be used for collecting the temperature of the temperature sampling position on the bus bar, that is, the temperature sensors may be used for collecting the temperature of other devices. In addition, the embodiment is not limited to only one temperature sampling position on the total bus bar, and a plurality of temperature sampling positions can be arranged on the total bus bar.
In some embodiments, if the target parameter is temperature, a temperature sensor is further disposed on the branch copper bar corresponding to at least one branch, and the temperature sensor is used for collecting the temperature of the temperature sampling position on the corresponding branch copper bar as the temperature of the corresponding branch.
In some embodiments, the target parameter is current, and the controller obtains the current of at least one branch in the communication data of the inverter through the data collector.
The embodiment discloses a low-voltage bus-bar cabinet, by disposing a temperature sensor at the temperature sampling position of the bus-bar copper, the controller obtains the temperature of the total copper busbar in the low-voltage busbar cabinet and the target parameter of at least one branch, under the condition that the temperature of the total bus bar reaches the preset starting temperature of the heat dissipation equipment and/or the target parameter of at least one branch reaches the preset starting threshold value of the heat dissipation equipment, the heat dissipation equipment in the low-voltage bus cabinet is started, so that the heat dissipation equipment can be started when the temperature of the whole machine is overhigh, the heat dissipation equipment can be started when the temperature of the whole machine is not high but the branches are overheated, and the safe operation of the low-voltage bus cabinet is ensured.
The embodiment of the invention also provides a photovoltaic system, referring to fig. 2, comprising an inverter and the low-voltage bus-bar described in any one of the embodiments, wherein the alternating-current output end of the inverter is connected with a branch of the low-voltage bus-bar.
According to the photovoltaic system disclosed by the embodiment, through improving the heat dissipation control method of the low-voltage bus cabinet, heat dissipation equipment can be started when the temperature of the whole photovoltaic system is too high, and can also be started when the temperature of the whole photovoltaic system is not high but the branches are overheated, so that the safe operation of the low-voltage bus cabinet is ensured, and the safe operation of the whole photovoltaic system is further ensured.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments may be combined in any manner, and features described in the embodiments in the present specification may be replaced or combined with each other in the above description of the disclosed embodiments, so as to enable those skilled in the art to make or use the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. The utility model provides a low-voltage conflux cabinet heat dissipation control method which characterized in that is applied to the controller in the low-voltage conflux cabinet, low-voltage conflux cabinet still includes firing equipment, at least one branch road and total copper bar of converging, and at least one branch road inserts total copper bar of converging, low-voltage conflux cabinet heat dissipation control method includes:
acquiring the temperature of a total copper busbar in a low-voltage busbar cabinet and target parameters of at least one branch, wherein the target parameters are temperature or current;
And if the temperature of the total bus bar reaches a preset starting temperature of the heat dissipation device and/or the target parameter of at least one branch reaches a preset starting threshold of the heat dissipation device, starting the heat dissipation device in the low-voltage bus cabinet.
2. The method for controlling heat dissipation of a low-voltage bus-bar according to claim 1, wherein the obtaining the temperature of the bus-bar and the target parameter of at least one branch in the low-voltage bus-bar comprises:
acquiring the temperature of one or more temperature sampling positions on the total bus copper bar;
and if the temperatures of all the temperature sampling positions do not reach the preset starting temperature of the heat radiation equipment, acquiring target parameters of at least one branch.
3. The method for controlling heat dissipation of a low-voltage bus-bar according to claim 2, wherein the obtaining the target parameter of at least one branch comprises:
judging whether the inverter is offline;
And if the inverter is not offline, acquiring the current of at least one branch in the communication data of the inverter.
4. The method for controlling heat dissipation of a low-voltage bus-bar according to claim 2, wherein the obtaining the target parameter of at least one branch comprises:
And acquiring the temperature of the temperature sampling position on at least one branch copper bar.
5. The low-voltage junction box heat dissipation control method according to claim 1, further comprising, after starting the heat dissipation device in the low-voltage junction box:
acquiring the temperature of the total bus copper bar and the target parameter of at least one branch;
And if the temperature of the total bus copper bar is smaller than the preset closing temperature of the heat dissipation device and the target parameters of all the branches are smaller than the preset closing threshold value of the heat dissipation device, closing the heat dissipation device.
6. The low-voltage junction box heat dissipation control method according to claim 5, further comprising:
If the temperature of the total bus copper bar is not less than the preset closing temperature of the heat dissipation equipment and/or the target parameter of at least one branch is not less than the preset closing threshold of the heat dissipation equipment, judging whether the inverter is offline;
If the inverter is not offline, judging whether the inverter is shut down;
and if the inverter is shut down, closing the heat dissipation device.
7. The utility model provides a low-voltage conflux cabinet heat dissipation controlling means, its characterized in that is applied to the controller in the low-voltage conflux cabinet, and low-voltage conflux cabinet still includes firing equipment, at least one branch road and total copper bar of converging, and at least one branch road inserts total copper bar of converging, low-voltage conflux cabinet heat dissipation controlling means includes:
The data acquisition unit is used for acquiring the temperature of the total copper busbar in the low-voltage busbar cabinet and the target parameter of at least one branch, wherein the target parameter is temperature or current;
And the heat radiation device control unit is used for starting the heat radiation device in the low-voltage bus cabinet if the temperature of the bus total copper bar reaches a preset heat radiation device starting temperature and/or the target parameter of at least one branch reaches a preset heat radiation device starting threshold.
8. A controller comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
The processor is configured to execute the low-voltage bus-bar heat dissipation control method according to the instructions in the program code.
9. The low-voltage bus cabinet is characterized by comprising a controller, a data collector, at least one branch, a bus total copper bar, one or more temperature sensors and heat dissipation equipment;
at least one branch is connected to the bus total copper bar;
at least one temperature sensor is used for collecting the temperature of the total copper busbar;
The controller is configured to acquire, by using the data acquisition unit, a temperature of the total copper busbar and a target parameter of at least one branch, and if the temperature of the total copper busbar reaches a preset starting temperature of the heat sink and/or the target parameter of at least one branch reaches a preset starting threshold of the heat sink, start the heat sink, and close the heat sink when the temperature of the total copper busbar is less than a preset closing temperature of the heat sink and the target parameters of all branches are less than a preset closing threshold of the heat sink; the target parameter is temperature or current.
10. A photovoltaic system comprising an inverter and the low voltage junction box of claim 9;
And the alternating current output end of the inverter is connected with the branch of the low-voltage confluence cabinet.
11. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements a low-voltage bus-bar heat dissipation control method as set forth in any one of claims 1 to 6.
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| CN202410175522.9A CN118042789A (en) | 2024-02-06 | 2024-02-06 | Low-voltage bus-bar cabinet heat dissipation control method and related equipment |
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| CN202410175522.9A CN118042789A (en) | 2024-02-06 | 2024-02-06 | Low-voltage bus-bar cabinet heat dissipation control method and related equipment |
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