CN112564618B - Cooling control method, device and system for photovoltaic module - Google Patents
Cooling control method, device and system for photovoltaic module Download PDFInfo
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- 238000001816 cooling Methods 0.000 title claims abstract description 335
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000010248 power generation Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 14
- 238000005507 spraying Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention provides a cooling control method, a cooling control device and a cooling control system for a photovoltaic module. And under the condition that the photovoltaic module is in the running state, the temperature of the photovoltaic module is controlled in a more reasonable range by dynamically setting the cooling threshold value according to the minimum running temperature of the photovoltaic module in the cooling process at each time, namely, the cooling threshold value of the subsequent cooling operation at each time is dynamically adjusted according to the minimum running temperature in the last cooling process except the initial cooling operation, so that the accuracy of the cooling threshold value is improved, and the accurate control of the cooling device is further realized.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a cooling control method, a cooling control device and a cooling control system for a photovoltaic module.
Background
The operating temperature of the photovoltaic module is one of the important factors affecting the performance of the photovoltaic power generation system. When the working temperature of the photovoltaic module is higher, the output power of the photovoltaic module is greatly reduced, the electric quantity loss is larger, and if the photovoltaic module is in a higher temperature for a long time, the service life of the photovoltaic module is seriously reduced.
In order to solve the problems, a cooling device, such as a cooler and a water spray pipe, is generally adopted to cool the photovoltaic module. The control logic of the photovoltaic module cooling device is as follows: collecting the temperature of a back plate of the photovoltaic module, and starting a cooling device when the temperature of the back plate of the photovoltaic module reaches a preset opening threshold value, so that the cooling device starts to work; and when the temperature of the photovoltaic module back plate is reduced to a closing threshold value, closing the cooling device to stop working.
However, the above control logic does not consider the difference in temperature in different regions and different seasons, for example, the temperature in summer in some regions is high, and when the photovoltaic module does not generate power, the detected temperature of the photovoltaic backplane may also exceed the start threshold, and the cooling device is started, so that the false start of the cooling device is caused. And when ambient temperature is higher, even start the heat sink, photovoltaic backplate temperature also probably can not be less than and close the threshold value, leads to the heat sink to work always, wastes water resource and electric energy. Therefore, the control logic of the existing cooling device can not accurately control the cooling device.
Disclosure of Invention
In view of this, the invention provides a cooling control method, device and system for a photovoltaic module, which realize accurate control of a cooling device.
In order to achieve the above purpose, the invention provides the following specific technical scheme:
a cooling control method of a photovoltaic module comprises the following steps:
determining whether the photovoltaic assembly in the cooling control area is in a running state;
under the condition that the photovoltaic module is in an operating state, acquiring the operating temperature of the photovoltaic module;
controlling a cooling device to perform cooling operation in a preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
and updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the cooling process.
Optionally, the determining whether the photovoltaic module in the cooling control area is in an operating state includes:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
Optionally, after controlling the cooling device to enter the hot start state, the method further includes:
controlling the cooling device to execute an initial cooling operation in the preset cooling period;
and acquiring the minimum operating temperature of the photovoltaic module in the initial cooling process, and setting an initial cooling threshold value according to the minimum operating temperature.
Optionally, the updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the cooling process includes:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
A cooling control device of a photovoltaic module comprises:
the operating state determining unit is used for determining whether the photovoltaic assembly in the cooling control area is in an operating state;
the operating temperature acquisition unit is used for acquiring the operating temperature of the photovoltaic module under the condition that the photovoltaic module is in an operating state;
the cooling device control unit is used for controlling a cooling device to perform cooling operation in a preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
and the cooling threshold updating unit is used for updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the current cooling process.
Optionally, the operation state determining unit is specifically configured to:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
Optionally, the device further comprises an initial cooling control unit;
the initial cooling control unit is used for controlling the cooling device to execute an initial cooling operation in the preset cooling period after controlling the cooling device to enter a hot start state;
the operating temperature acquiring unit is also used for acquiring the minimum operating temperature of the photovoltaic module in the initial cooling process;
and the cooling threshold updating unit is also used for setting an initial cooling threshold according to the minimum operating temperature of the photovoltaic module in the initial cooling process.
Optionally, the cooling threshold updating unit is specifically configured to:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
A cooling control system of a photovoltaic module comprises: the operation temperature acquisition device, the cooling device and the controller;
the operation temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in a cooling control area, and the photovoltaic assembly is connected to a photovoltaic power generation system and is positioned in a cooling range of the cooling device;
the controller is used for executing the cooling control method of the photovoltaic module as claimed in any one of claims 1 to 4.
Optionally, the cooling control system further includes:
the environment temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in the cooling control area, and the photovoltaic assembly is not connected with the photovoltaic power generation system and is positioned outside the cooling range of the cooling device;
and the reference temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic module in the cooling control area, and the photovoltaic module is connected into the photovoltaic power generation system and is positioned outside the cooling range of the cooling device.
Optionally, the cooling device includes: a booster pump, an electromagnetic valve, a spray head and a pipeline system;
the booster pump is arranged at a water outlet of the water pipe and supplies water through the pipeline system;
the pipeline system is branched into a plurality of branches by using a multi-way device;
each branch is provided with the electromagnetic valve and is used for controlling the on-off of the branch;
the spray head is installed on each branch, and the spray head is a rotary atomizing spray head.
Compared with the prior art, the invention has the following beneficial effects:
according to the cooling control method of the photovoltaic module, disclosed by the invention, by determining whether the photovoltaic module in the cooling control area is in the running state or not, the resource waste caused by controlling the cooling device to execute the cooling operation when the photovoltaic module is in the non-running state is avoided. And under the condition that the photovoltaic module is in the running state, the temperature of the photovoltaic module is controlled in a more reasonable range by dynamically setting the cooling threshold value according to the minimum running temperature of the photovoltaic module in the cooling process at each time, namely, the cooling threshold value of the subsequent cooling operation at each time is dynamically adjusted according to the minimum running temperature in the last cooling process except the initial cooling operation, so that the accuracy of the cooling threshold value is improved, and the accurate control of the cooling device is further realized.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart of a cooling control method for a photovoltaic module according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for determining whether a photovoltaic module is in an operating state according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cooling control device for a photovoltaic module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cooling control system of a photovoltaic module according to an embodiment of the present invention.
Detailed Description
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 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 discloses a cooling control method of a photovoltaic module, which is applied to a controller in a cooling control system of the photovoltaic module, and particularly, referring to fig. 1, the method comprises the following steps:
s101: determining whether the photovoltaic assembly in the cooling control area is in a running state;
the cooling control area is an area covered by the controller for controlling the cooling device to perform cooling operation. One or more photovoltaic modules are included in the cooling control area.
The controller can determine whether the photovoltaic assembly in the cooling control area is in the running state or not by acquiring external information.
The controller can also determine whether the photovoltaic module is in an operating state by detecting the ambient temperature of the photovoltaic module and a reference temperature.
Referring to fig. 2, determining whether the photovoltaic module in the cooling control area is in an operating state includes the following steps:
s201: acquiring the ambient temperature and the reference temperature of the photovoltaic module;
the environment temperature of the photovoltaic module is acquired by the environment temperature acquisition device, and the reference temperature is acquired by the reference temperature acquisition device.
Ambient temperature collection system for thermal resistance temperature sensor, installs on cooling control area internal photovoltaic module's backplate, this photovoltaic module does not have photovoltaic power generation system and is located outside the cooling scope of heat sink, that is to say, ambient temperature only is relevant with the temperature of photovoltaic module place environment, does not receive the influence of whether generating electricity of photovoltaic module, also does not receive the influence of heat sink.
The reference temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in a cooling control area, the photovoltaic assembly is connected to a photovoltaic power generation system and is positioned outside the cooling range of the cooling device, namely, the reference temperature is only related to whether the photovoltaic assembly generates power or not and is not influenced by the cooling device.
Because the photovoltaic module where the reference temperature acquisition device is located is connected to the photovoltaic power generation system, the photovoltaic module is in a running state, namely the temperature of the photovoltaic module rises during power generation, and the reference temperature is higher than the ambient temperature.
S202: judging whether the difference value of the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value or not;
if yes, S203: determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state;
namely, the photovoltaic module is in a power generation state.
If not, S204: and determining that the photovoltaic module is in a non-operation state.
I.e. the photovoltaic module is in a non-generating state.
S102: under the condition that the photovoltaic module is in an operating state, acquiring the operating temperature of the photovoltaic module;
the operating temperature of the photovoltaic module is acquired by the operating temperature acquisition device, the operating temperature acquisition device is a thermal resistance temperature sensor and is installed on a back plate of the photovoltaic module in a cooling control area, the photovoltaic module is connected into a photovoltaic power generation system and is positioned in a cooling range of the cooling device, namely, the operating temperature is the real-time temperature of the photovoltaic module in an operating state and is influenced by the cooling device.
S103: controlling a cooling device to perform cooling operation in a preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
it should be noted that, when the controller detects that the photovoltaic module is switched from the non-operating state to the operating state, and the cooling device enters the hot start state, the controller controls the cooling device to execute the initial cooling operation within the preset cooling period, and sets the initial cooling threshold value according to the minimum operating temperature of the photovoltaic module in the initial cooling process, as the cooling threshold value for the next cooling operation.
The operation temperature acquisition device acquires the operation temperature of the photovoltaic module every preset time, such as 5s, because the temperature of the photovoltaic module begins to fall after the cooling operation and slowly rises after the temperature falls to the lowest point, taking the operation temperature acquisition device acquiring the operation temperature of the photovoltaic module every 5s as an example, the minimum operation temperature Ctmin is calculated according to the operation temperature Ct of the photovoltaic module, and the calculation method is as follows:
s104: and updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the cooling process.
Specifically, the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process is set as a cooling threshold value, the preset cooling difference value can be 10, and the preset cooling difference value can be set according to an experimental value or an empirical value.
The cooling device can cool through water spraying or circulating cooling water. Preferably, this embodiment utilizes the evaporation of water to take away the heat of subassembly through controlling the atomizer to spray atomizing water to the photovoltaic module surface.
Executing a cooling operation in a preset cooling period, specifically: the controller sends water pump and solenoid valve opening signal, a shower nozzle work of solenoid valve correspondence control, n solenoid valves, and every solenoid valve opening time closes after t0, and in order to guarantee enough water pressure, n solenoid valves open in proper order, and a solenoid valve opening time closes after t0 promptly, opens next solenoid valve again, and all solenoid valves open and close in proper order, and the cooling operation of a preset cooling cycle is accomplished to the completion of opening and stopping in proper order of all solenoid valves.
Therefore, according to the cooling control method for the photovoltaic module disclosed in this embodiment, by determining whether the photovoltaic module in the cooling control area is in the operating state, resource waste caused by controlling the cooling device to perform the cooling operation when the photovoltaic module is in the non-operating state is avoided. And under the condition that the photovoltaic module is in the running state, the temperature of the photovoltaic module is controlled in a more reasonable range by dynamically setting the cooling threshold value according to the minimum running temperature of the photovoltaic module in the cooling process at each time, namely, the cooling threshold value of the subsequent cooling operation at each time is dynamically adjusted according to the minimum running temperature in the last cooling process except the initial cooling operation, so that the accuracy of the cooling threshold value is improved, and the accurate control of the cooling device is further realized.
Based on the cooling control method of the photovoltaic module disclosed in the above embodiment, this embodiment correspondingly discloses a cooling control device of the photovoltaic module, which is applied to a controller in a cooling control system of the photovoltaic module, please refer to fig. 3, and the device includes:
an operating state determining unit 301, configured to determine whether a photovoltaic module in the cooling control area is in an operating state;
an operating temperature obtaining unit 302, configured to obtain an operating temperature of the photovoltaic module when the photovoltaic module is in an operating state;
the cooling device control unit 303 is configured to control a cooling device to perform a cooling operation within a preset cooling period when the operating temperature of the photovoltaic module is greater than a cooling threshold, where the cooling threshold is set according to a minimum operating temperature of the photovoltaic module within a previous preset cooling period;
and a cooling threshold updating unit 304, configured to update the cooling threshold according to the minimum operating temperature of the photovoltaic module in the current cooling process.
Optionally, the operation state determining unit 301 is specifically configured to:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
Optionally, the device further comprises an initial cooling control unit;
the initial cooling control unit is used for controlling the cooling device to execute an initial cooling operation in the preset cooling period after controlling the cooling device to enter a hot start state;
the operating temperature obtaining unit 302 is further configured to obtain a minimum operating temperature of the photovoltaic module in an initial cooling process;
the cooling threshold updating unit 304 is further configured to set an initial cooling threshold according to a minimum operating temperature of the photovoltaic module in an initial cooling process.
Optionally, the cooling threshold updating unit 304 is specifically configured to:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
According to the cooling control device for the photovoltaic module, whether the photovoltaic module is in the running state or not in the cooling control area is determined, and resource waste caused by the fact that the cooling device is controlled to perform cooling operation when the photovoltaic module is in the non-running state is avoided. And under the condition that the photovoltaic module is in the running state, the temperature of the photovoltaic module is controlled in a more reasonable range by dynamically setting the cooling threshold value according to the minimum running temperature of the photovoltaic module in the cooling process at each time, namely, the cooling threshold value of the subsequent cooling operation at each time is dynamically adjusted according to the minimum running temperature in the last cooling process except the initial cooling operation, so that the accuracy of the cooling threshold value is improved, and the accurate control of the cooling device is further realized.
This embodiment also discloses a photovoltaic module's cooling control system, includes: the operation temperature acquisition device, the cooling device and the controller;
the operation temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in a cooling control area, and the photovoltaic assembly is connected to a photovoltaic power generation system and is positioned in a cooling range of the cooling device;
the cooling device can be a device for cooling through water spraying, can also be a device for cooling through circulating cooling water, and can also be a device for cooling through spraying mist water.
The controller is used for executing the cooling control method of the photovoltaic module as follows:
determining whether the photovoltaic assembly in the cooling control area is in a running state;
under the condition that the photovoltaic module is in an operating state, acquiring the operating temperature of the photovoltaic module;
controlling a cooling device to perform cooling operation in a preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
and updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the cooling process.
Further, the determining whether the photovoltaic module in the cooling control area is in the operating state includes:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
Further, after controlling the cooling device to enter the hot start state, the method further comprises:
controlling the cooling device to execute an initial cooling operation in the preset cooling period;
and acquiring the minimum operating temperature of the photovoltaic module in the initial cooling process, and setting an initial cooling threshold value according to the minimum operating temperature.
Further, according to this cooling in-process the minimum operating temperature of photovoltaic module updates the cooling threshold value includes:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
Optionally, when the cooling control system determines whether the photovoltaic module is in the operating state by comparing the ambient temperature with the reference temperature, the cooling control system further includes:
the environment temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in the cooling control area, and the photovoltaic assembly is not connected with the photovoltaic power generation system and is positioned outside the cooling range of the cooling device;
and the reference temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic module in the cooling control area, and the photovoltaic module is connected into the photovoltaic power generation system and is positioned outside the cooling range of the cooling device.
In the case that the cooling control system determines whether the photovoltaic module is in the operating state by comparing the ambient temperature with the reference temperature, and cools by spraying the mist water, please refer to fig. 4, the cooling control system of the photovoltaic module disclosed in this embodiment includes:
ambient temperature acquisition apparatus 1: the photovoltaic module is a thermal resistance temperature sensor and is arranged on a back plate of the photovoltaic module in a cooling control area, and the photovoltaic module is not connected with a photovoltaic power generation system and is positioned outside the cooling range of the cooling device.
Reference temperature acquisition device 2: the photovoltaic module is a thermal resistance temperature sensor and is arranged on a back plate of the photovoltaic module in a cooling control area, and the photovoltaic module is connected to a photovoltaic power generation system and is positioned outside the cooling range of the cooling device.
Operating temperature acquisition device 3: the photovoltaic module is a thermal resistance temperature sensor and is arranged on a back plate of the photovoltaic module in a cooling control area, and the photovoltaic module is connected into a photovoltaic power generation system and is positioned in a cooling range of the cooling device.
And (4) a booster pump: is arranged at the water outlet of the tap water pipe and supplies water through a pipeline system.
An electromagnetic valve group 5: the on-off of the pipeline is controlled, and the opening and closing of the multi-way pipeline are realized.
The nozzle group 6: the shower nozzle adopts rotatory atomizer, and the shower nozzle group is installed in the middle of the multirow subassembly, arranges a shower nozzle at every a section distance, realizes that all photovoltaic module in the cooling control region can both spray vaporific water.
The controller 7: all temperature signals are collected to the controller, and the controller can output booster pump and solenoid valve control signals to control the start and stop of the booster pump and the solenoid valve.
The pipeline system 8: HDPE pipes are used and are branched into a plurality of branches by using a multi-way device.
The booster pump is installed in water pipe water outlet department, and the booster pump delivery port is connected into the main line after, and the branch becomes several branches and arrives cooling control area central authorities, and every branch all is equipped with an electromagnetic valve. The environment temperature acquisition device, the reference temperature acquisition device and the operation temperature acquisition device send the acquired temperature signals to the controller through the communication cable, the controller carries out operation processing on the acquired signals, judges whether control signals of the electromagnetic valve and the water pump are output or not, and controls the spray nozzle group to spray mist water, so that the assembly is cooled.
First, the cooling control system of photovoltaic module that this embodiment disclosed adopts atomizer to spray vaporific water, and the heat is taken away in the water smoke evaporation on photovoltaic module surface, and this mode can reach the purpose of photovoltaic module cooling with minimum water resource.
Second, the disclosed cooling control system of photovoltaic module of this embodiment, the controller is through confirming whether photovoltaic module is in the running state in the cooling control area, avoids controlling the wasting of resources that the heat sink carries out the cooling operation and leads to when photovoltaic module is in non-running state.
Third, the disclosed cooling control system of photovoltaic module of this embodiment, the controller is under the condition that photovoltaic module is in running state, through the minimum operating temperature according to at every turn cooling in-process photovoltaic module, the developments set up the cooling threshold value, with photovoltaic module's temperature control in more reasonable scope, except that initial cooling operation promptly, the cooling threshold value of follow-up at every turn cooling operation all is according to the minimum operating temperature dynamic adjustment in the last cooling in-process, the accuracy of cooling threshold value has been improved, and then realize the accurate control to the heat sink.
The above embodiments can be combined arbitrarily, and the features described in the embodiments in the present specification can be replaced or combined with each other in the above description of the disclosed embodiments, so that those skilled in the art can implement 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 (9)
1. A cooling control method of a photovoltaic module is characterized by comprising the following steps:
determining whether the photovoltaic assembly in the cooling control area is in a running state;
under the condition that the photovoltaic module is in an operating state and the cooling device enters a hot start state, controlling the cooling device to execute an initial cooling operation within a preset cooling period;
acquiring the minimum operating temperature of the photovoltaic module in the initial cooling process, and setting an initial cooling threshold value according to the minimum operating temperature;
under the condition that the photovoltaic module is in an operating state, acquiring the operating temperature of the photovoltaic module;
controlling the cooling device to perform cooling operation in the preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
and updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the cooling process.
2. The method of claim 1, wherein determining whether photovoltaic components are in an operational state within the reduced temperature control zone comprises:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
3. The method according to claim 1, wherein the updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the current cooling process includes:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
4. The utility model provides a photovoltaic module's cooling control device which characterized in that includes:
the operating state determining unit is used for determining whether the photovoltaic assembly in the cooling control area is in an operating state;
the operating temperature acquisition unit is used for acquiring the operating temperature of the photovoltaic module under the condition that the photovoltaic module is in an operating state;
the cooling device control unit is used for controlling a cooling device to perform cooling operation in a preset cooling period under the condition that the operating temperature of the photovoltaic module is greater than a cooling threshold, wherein the cooling threshold is set according to the minimum operating temperature of the photovoltaic module in the last preset cooling period;
the cooling threshold updating unit is used for updating the cooling threshold according to the minimum operating temperature of the photovoltaic module in the current cooling process;
the device also comprises an initial cooling control unit;
the initial cooling control unit is used for controlling the cooling device to execute an initial cooling operation in the preset cooling period after controlling the cooling device to enter a hot start state;
the operating temperature acquiring unit is also used for acquiring the minimum operating temperature of the photovoltaic module in the initial cooling process;
and the cooling threshold updating unit is also used for setting an initial cooling threshold according to the minimum operating temperature of the photovoltaic module in the initial cooling process.
5. The apparatus according to claim 4, wherein the operating state determining unit is specifically configured to:
acquiring the ambient temperature and the reference temperature of the photovoltaic module;
and under the condition that the difference value between the reference temperature and the environment temperature is greater than a preset photovoltaic module power generation temperature threshold value, determining that the photovoltaic module is in an operating state, and controlling the cooling device to enter a hot start state.
6. The apparatus according to claim 4, wherein the cooling threshold updating unit is specifically configured to:
and setting the sum of the minimum operating temperature of the photovoltaic module and a preset cooling difference value in the cooling process as the cooling threshold value.
7. A cooling control system of a photovoltaic module is characterized by comprising: the operation temperature acquisition device, the cooling device and the controller;
the operation temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in a cooling control area, and the photovoltaic assembly is connected to a photovoltaic power generation system and is positioned in a cooling range of the cooling device;
the controller is used for executing the cooling control method of the photovoltaic module as claimed in any one of claims 1 to 3.
8. The system of claim 7, wherein the cooling control system further comprises:
the environment temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic assembly in the cooling control area, and the photovoltaic assembly is not connected with the photovoltaic power generation system and is positioned outside the cooling range of the cooling device;
and the reference temperature acquisition device is a thermal resistance temperature sensor and is arranged on a back plate of a photovoltaic module in the cooling control area, and the photovoltaic module is connected into the photovoltaic power generation system and is positioned outside the cooling range of the cooling device.
9. The system of claim 7, wherein the cooling device comprises: a booster pump, an electromagnetic valve, a spray head and a pipeline system;
the booster pump is arranged at a water outlet of the water pipe and supplies water through the pipeline system;
the pipeline system is branched into a plurality of branches by using a multi-way device;
each branch is provided with the electromagnetic valve and is used for controlling the on-off of the branch;
the spray head is installed on each branch, and the spray head is a rotary atomizing spray head.
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| TWI453363B (en) * | 2010-09-14 | 2014-09-21 | Chunghwa Telecom Co Ltd | Dynamic adjustment method of ice water temperature in ice water host |
| CN204425268U (en) * | 2015-03-17 | 2015-06-24 | 海南汉能薄膜太阳能有限公司 | A kind of photovoltaic system and solar module heat sink thereof |
| JP6667245B2 (en) * | 2015-09-30 | 2020-03-18 | 三機工業株式会社 | Solar panel watering system |
| CN205595350U (en) * | 2016-04-27 | 2016-09-21 | 衢州职业技术学院 | Photovoltaic module with automatically function of cooling down |
| CN206472097U (en) * | 2016-09-08 | 2017-09-05 | 广东科凌新能源有限公司 | A kind of solar panel automatic cleaning and heat sink |
| CN206302378U (en) * | 2016-12-07 | 2017-07-04 | 阳光电源股份有限公司 | A kind of water-cooled photovoltaic power station system based on component/substring level power optimization |
| CN106953594B (en) * | 2017-04-13 | 2019-03-05 | 合肥阳光新能源科技有限公司 | A kind of photovoltaic module spray water control system and method |
| CN107873477A (en) * | 2017-11-14 | 2018-04-06 | 许小球 | A kind of photovoltaic with cooling function and greening hybrid system and its control method |
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