CN206302378U - A kind of water-cooled photovoltaic power station system based on component/substring level power optimization - Google Patents
A kind of water-cooled photovoltaic power station system based on component/substring level power optimization Download PDFInfo
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- CN206302378U CN206302378U CN201621331430.2U CN201621331430U CN206302378U CN 206302378 U CN206302378 U CN 206302378U CN 201621331430 U CN201621331430 U CN 201621331430U CN 206302378 U CN206302378 U CN 206302378U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a kind of water-cooled photovoltaic power station system based on component/substring level power optimization, it includes photovoltaic system and water-cooling system；The photovoltaic system includes at least one photovoltaic module, at least one component/substring level power optimization device, and each component/substring level power optimization device connects at least one photovoltaic module.Water-cooled photovoltaic power station system based on component/substring level power optimization of the present utility model, it is possible to prevente effectively from water-cooling method because photovoltaic module cooling it is uneven caused by system excess power loss, while water-cooled improves photovoltaic module power, system generated energy is more effectively improved.
Description
Technical field
The utility model is related to a kind of photovoltaic power station system, more particularly to a kind of based on component/substring level power optimization
Water-cooled photovoltaic power station system.
Background technology
The existing photovoltaic plant comprising water-cooling system inverter mainly is centralized high-power inverter, group string data
Middle low power inverter, belongs to concentration/group string data power output.I.e. in these photovoltaic power station systems, be all multiple component strings,
Inverter is accessed after parallel connection again, the maximum power point for carrying out multiple group strings by MPPT algorithm is found.Now inverter finds
Maximum power point is usually total defeated after several groups of strings (group string inverter) or the parallel connection of tens group strings (centralized inverter)
The Best Point gone out in characteristic, is global maximum power point.
From the electrical characteristic of photovoltaic module, the easy temperature influence of photovoltaic module.It is illustrated in fig. 1 shown below, different temperatures pair
The power output of component has considerable influence：Temperature is lower, and power output is bigger；Conversely, as the same.Therefore, using water-cooling system pair
Photovoltaic system is lowered the temperature, and can improve the power output of photovoltaic system, improves generated energy.
But during water-cooling system is lowered the temperature, with water and the carrying out of the heat exchange of assembly surface, the cooling water of flowing
Temperature can more and more higher, therefore it is uneven to cause to flow through the photovoltaic module cooling of same current.Usually, first connect with cooling water
Tactile component top can be lower compared with component bottom temperature.When component is double or multiple rows of installation, the component temperature of the row of showing as
Degree can be low compared with lower row's assembly temperature.It can be seen from Fig. 1, the power output that component is arranged up and down can be inconsistent.If this row's group up and down
Part is connected into same group of string, and it can be seen from series characteristic, the power output of final group string can lose a part of power, for balancing
The inconsistent each group string of power.It follows that the problems such as water-cooling system easily brings cooling uneven to photovoltaic system, increases each
Individual difference between component.Therefore, in the practical application of current water-cooled photovoltaic power station system, the cooling mode institute of water-cooled
The generated energy lifting for bringing does not reach dreamboat.
Utility model content
It is the technical problem for solving to cause system excess power to be lost because photovoltaic module cooling is uneven, the utility model
A kind of water-cooled photovoltaic power station system based on component/substring level power optimization is provided, it is avoided that due to using water-cooling pattern drop
Temperature and making lower the temperature between each photovoltaic module it is inconsistent caused by power loss.
The utility model concrete technical scheme is as follows：A kind of water-cooled photovoltaic plant based on component/substring level power optimization
System, it includes photovoltaic system and water-cooling system；The photovoltaic system includes at least one photovoltaic module, at least one component/son
Tandem power optimization device, each component/substring level power optimization device connects at least one photovoltaic module；The power optimization is filled
It is set to DC/AC converters or DC/DC converters；When the power optimization device is DC/AC converters, all photovoltaic modulies connect phase
The input of the DC/AC converters answered, the output-parallel of each DC/AC converter together, electricity is entered via exchange side apparatus
Net；When the power optimization device is DC/DC converters, multiple photovoltaic modulies connect the input of corresponding DC/DC converters, often
The output of individual DC/DC converters is cascaded, and the input of correspondence inverter is connected to after formation photovoltaic group string, inverter
Output end enters power network via exchange side apparatus again.
Used as the further improvement of such scheme, the water-cooling system carries out water-cooled cooling to the photovoltaic module, the water-cooled system
System includes water pump, at least one sparge pipe, at least one shower nozzle；At least one shower nozzle is installed, the water pump will on every sparge pipe
The coolant at water source delivers to the sparge pipe, and is sprayed from the top of each photovoltaic module by the shower nozzle on the sparge pipe.
Further, when the photovoltaic module is independently installed, a sparge pipe is fixed on the top of the photovoltaic module, and makes phase
Shower nozzle is answered to be sprayed from the top of the photovoltaic module；When multiple photovoltaic module group strings are installed as photovoltaic group string form, the photovoltaic group
A sparge pipe is fixed on the top of string, and corresponding shower nozzle is sprayed from the top of the photovoltaic group string.
Further, a valve for being used to control shower nozzle to open and close is installed on each shower nozzle；Or, every water spray
Pipe installs a valve, is opened while the valve is used to control all shower nozzles on corresponding sparge pipe and simultaneously closed off.
Further, the water-cooling system also includes Water Sproading groove, and the bottom that the Water Sproading groove is located at the photovoltaic module is used for
Reclaim coolant of the spray on the photovoltaic module.Coolant from the Water Sproading groove returns back to the water pump by water pipe.
Yet further, the water-cooling system also includes cooling device, and the cooling device is arranged on the water pipe to be used for returning
The water pump is returned back to again after the coolant cooling of receipts.
Yet further, the water-cooling system also includes filter, and the filter is used to filter into the cold of the water pump
But liquid.
The water-cooled photovoltaic power station system based on component/substring level power optimization that the utility model is provided, it is main beneficial
Effect is as follows：With the water-cooled photovoltaic power station system of component/substring level power optimization device, it is possible to prevente effectively from water-cooling method because
System excess power loss caused by photovoltaic module cooling is uneven, while water-cooled improves photovoltaic module power, more has
Improve system generated energy in effect ground.
Brief description of the drawings
Fig. 1 is the schematic diagram of photovoltaic module output characteristics temperature influence.
Fig. 2 is the composition schematic diagram of the water-cooled photovoltaic power station system of the utility model embodiment 1, water-cooled photovoltaic power station system
The component for using/substring level power optimization device is DC/AC converters.
Fig. 3 is similar to Fig. 2, is that the another of the cold photovoltaic power station system of Fig. 2 reclaimed waters constitutes schematic diagram, water-cooled photovoltaic plant system
The component that system is used/substring level power optimization device is DC/DC converters.
Fig. 4 is the modular structure schematic diagram of traditional water-cooled photovoltaic power station system based on concentration/group string data power output.
Fig. 5 is that the water-cooled photovoltaic power station system of the component level power optimization that the utility model is based on Miniature inverter is illustrated
Figure.
Fig. 6 is that the water-cooled photovoltaic power station system of the component level power optimization that the utility model is based on power optimization device is illustrated
Figure.
Fig. 7 is the water-cooled photovoltaic power station system schematic diagram that the utility model is based on substring level power optimization.
Fig. 8 is the composition schematic diagram of the water-cooled photovoltaic power station system of the utility model embodiment 2.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
Embodiment 1
Also referring to Fig. 2 and Fig. 3, now to the water-cooled photovoltaic based on component/substring level power optimization of the present utility model
Electric power station system carries out that explanation is developed in details.
Water-cooled photovoltaic power station system based on component/substring level power optimization of the present utility model includes photovoltaic system and water
Cooling system.The photovoltaic system and water-cooling system include that multiple photovoltaic modulies 2, exchange side apparatus 1 are relative with these photovoltaic modulies 2
The multiple components answered/substring level power optimization device 3.Each component/substring level power optimization device 3 connects at least one photovoltaic
Component 2.The water-cooling system carries out water-cooled cooling to the photovoltaic module 2.
Power optimization device, realizes that component or component substring output end export the maximum of certain substring in the component or the component
PV power.Power optimization device can be DC/AC converters or DC/DC converters.
Such as Fig. 2, when component/substring level power optimization device is DC/AC converters, all photovoltaic modulies 2 are connected accordingly
DC/AC converters input, the output-parallel of each DC/AC converter together, via exchange side apparatus 1 enter power network
5.In the present embodiment, when component/substring level power optimization device is DC/AC converters, all photovoltaic modulies 2 are concatenated accordingly
After component/substring level power optimization device 3, output-parallel is connected on exchange cable 4, then enters electricity by exchanging side apparatus 1
Net 5.
Such as Fig. 3, when component/substring level power optimization device is DC/DC converters, multiple photovoltaic modulies 2 are connected accordingly
DC/DC converters input, the output of each DC/DC converter is cascaded, and is formed and be connected to after photovoltaic group string right
The output end of the input of inverter, inverter is answered to enter power network 5 via exchange side apparatus 1 again.In the present embodiment, Suo Youguang
After the volt concatenation of component 2 corresponding assembly/substring level power optimization device 3, multiple output ends are cascaded to form photovoltaic group string, many
Individual photovoltaic group string is confluxed using direct current cable 41 by direct current conflux case, then is reverse into exchange output by inverter, then
Enter power network 5 by exchanging side apparatus 1.
When component/substring level power optimization device is DC/DC converters, it is also possible to without direct current conflux case, Duo Geguang
Volt group string is directly connected to the input of inverter.
In water-cooled photovoltaic power station system, photovoltaic group string is formed by connecting by the series and parallel of photovoltaic module 2, is mainly used in receiving
Solar radiation, and electric energy is converted into, it is the energy source of whole photovoltaic system.Support 15 is installed below photovoltaic group string, is risen
Supporting role.Each photovoltaic module 2 passes through with a component/substring level power optimization device 3 in water-cooled photovoltaic power station system
Cable 16 is connected, and it can search out the peak power output of the photovoltaic module 2 being attached thereto and export.Exchange side apparatus master
To be exchanged including AC power distribution cabinet/AC distribution panel, transformer, electromagnetic interface filter, relay or breaker, lightning protection device, electric energy measuring equipment etc. and set
It is standby, for carrying out conflux distribution, isolation boosting, EMI filtering, relay protection, carrying out surge protection, electric energy to photovoltaic system exchange output
Metering etc., its output end is connected with power network 5, that is, be connected to the grid 5.
In certain traditional group string, it is assumed that component n (n=1,2 ... ... n) have differences each other,
The peak power output being each provided with certain operating mode is that (n=1,2 ... ... n), if concentration/group string data power output is obtained for Pn
Maximum group string power is PCollection/group.Water-cooled photovoltaic power station system application component/substring level power optimization device 3, maximum group for obtaining
String power is then the component/substring power sum of each photovoltaic module 2, is set to PGroup/substringFollowing relation will necessarily then be met：PGroup/substring=
Σ Pn (n=1,2 ... n)>PCollection/group。
In component/substring level power optimization device 3, the output of component level power optimization, refers to pass through as shown in Figure 5 and Figure 6
Independent component level MPPT algorithm searches out the maximum power point of the component and is exported.The component level power of Fig. 5 examples is excellent
Change is realized by DC/AC converters, and the output-parallel of multiple DC/AC converters is together；The component level power optimization of Fig. 6 examples
It is to be realized by DC/DC converters, the output of multiple DC/DC converters is cascaded to form a group string, rear class connects inverter.Separately
Outward, 1 component level power optimization device can also connect the component of 2 pieces and above quantity, with common sparing circuit and structural member, drop
Low cost.
It is in series by three substrings according to a component, therefore derives substring level power optimization.Substring level power optimization
Output, as shown in fig. 7, be that MPPT is carried out by a separate substring level DC/DC converter of component internal 3 respectively,
The maximum power point of correspondence substring is searched out respectively and is exported.
As can be seen here, general concentration/group string data power output is changed to the applicable component of single photovoltaic module 2/substring level
The component of power optimization device 3/substring level power optimization output, can avoid being led due to inconsistent between each photovoltaic module 2
The power loss of cause.For water-cooled photovoltaic system, the component/substring level power of application component/substring level power optimization device 3 is excellent
Change output be avoided that in water-cooling method because photovoltaic module 2 lower the temperature it is uneven caused by the loss of system excess power.
One of the utility model key is component/substring level power optimization device 3 in water-cooled photovoltaic power station system
Using.Component of the present utility model/substring level power optimization device 3, can by the Miniature inverter that has occurred in the market,
Referred to as micro- inverter or micro- inverse realization；Also can be realized by the photovoltaic power optimizer for having occurred in the market.
Referring to Fig. 2 and Fig. 3, water-cooling system in the present embodiment at least includes water pump 7, at least one sparge pipe
8th, at least one shower nozzle 9 and some sections of water pipes 10 needed for connecting these parts.At least one is installed on every sparge pipe 8 to spray
First 9, the coolant at water source 6 is delivered to the sparge pipe 8 by the water pump 7, and by the shower nozzle 9 on the sparge pipe 8 from each photovoltaic group
The top spray of part 2.Coolant can use water.The quantity of sparge pipe 8 is not particularly limited, and can parallel set many
Sparge pipe, the shower nozzle 9 on every sparge pipe 8 can also be increased or decreased according to actual conditions.When 2 groups of string peaces of multiple photovoltaic modulies
Fill during for photovoltaic group string form, a sparge pipe 8 is fixed on the top of the photovoltaic group string, and makes corresponding shower nozzle 9 from the photovoltaic group string
Top spray.
Spraying cooling is controlled for convenience, and a valve for controlling shower nozzle 9 to open and close can be installed on each shower nozzle 9
Door 13.Can certainly every sparge pipe 8 valve is installed, the valve is used to control all shower nozzles on corresponding sparge pipe 8
While open and simultaneously close off.In order to realize intelligent management and control, valve 13 can use electronic valve, and whole water-cooling system may be used also
To set controller (not shown), at least one temperature sensor (not shown).The temperature sensor is used to detect the photovoltaic group
The temperature of part 2, the controller is electrically connected with the water pump 7, the valve 13, the temperature sensor, and in the photovoltaic module 2
Detection temperature starts the water pump 7 and the valve 13 corresponding with corresponding photovoltaic module 2 when exceeding threshold value.Therefore, photovoltaic is only worked as
When the temperature of component 2 exceedes given threshold, water pump 7 and valve 13 are just opened, when the temperature of photovoltaic module 2 is less than given threshold
When, you can switch off the pump 7 and valve 13.
In order to avoid coolant influences environment or brings unnecessary trouble, coolant can be reclaimed, can be at this
Water Sproading groove 14 is set in water-cooling system, and the bottom that the Water Sproading groove 14 can be located at the photovoltaic module 2 is used to reclaim spray at this
Coolant on photovoltaic module 2.
In order to beautify the environment, improve efficiency, the coolant from the Water Sproading groove 14 can return back to the water by water pipe 10
Pump 7.During recycling, cooling device 12 can also be set in the water-cooling system, the cooling device 12 is arranged on the water pipe 10
It is upper to be used to return back to the water pump 7 again after cooling down the coolant for reclaiming.In order to strengthen cooling effect, can also be in the water-cooling system
Middle setting filter 11, the filter 11 is used to filter the coolant for entering the water pump 7.
In sum, the water-cooled photovoltaic power station system of the present embodiment, mainly by setting water-cooled on photovoltaic power station system
System and constitute.Shower nozzle 9 is mounted on the sparge pipe 8 of the upper end of photovoltaic module 2, is controlled by valve 13, for photovoltaic group
Part 2 sprays coolant.Sparge pipe 8 is connected by its residual water pipe 10 with water pump 7, and water pump 7 is taken out the water at lower water source 6 by pressure
Into sparge pipe 8.The source of cooling system reclaimed water includes diversified forms, and such as running water, recirculated water, well water or Lake Water is natural
Water.Positioned at the high temperature coolant that the Water Sproading groove 14 of the bottom of photovoltaic module 2, recovery flow down from photovoltaic module 2.Cooling device
12 are connected with Water Sproading groove 14, the used high-temperature cooling water that Water Sproading groove 14 is collected into, by can be with after cooling device 12
Temperature is reduced, continues to inject cooling system as coolant, circulating cooling is used.Filter 11 is arranged on the front end of water pump 7,
It is mainly used in filtering the water at the water that is collected into from Water Sproading groove 14 and water source in water pipe 10.
In above-mentioned water-cooled photovoltaic power station system, photovoltaic power station system can be independently installed with two systems with water-cooling system,
And it each is equipped with corresponding control system.When certain illumination, temperature conditionss are met, photovoltaic power station system starts, and carries out light
Volt inversion.After the photovoltaic power station system one disconnected time of operation, when the temperature of photovoltaic module 2 is constantly raised, water-cooling system detects this
When the temperature of photovoltaic module 2 exceed its predetermined threshold value, the valve 13 of the shower nozzle 9 of water-cooling system control photovoltaic module 2 top is opened,
Lower the temperature to the spray of photovoltaic module 2 coolant such as water.With the carrying out of spray cooling, the temperature of photovoltaic module 2 begins to decline, now photovoltaic
The power output of component 2 will become big, and the generated energy of photovoltaic power station system will also increase.When the temperature of photovoltaic module 2 is reduced to
Below predetermined threshold value, water-cooling system is stopped, and now individually carries out photovoltaic inversion by photovoltaic power station system.With entering for inversion
OK, the temperature of photovoltaic module 2 will be raised again, and water-cooling system will be again started up more than predetermined threshold value, so be gone round and begun again.
When water-cooling system is run, the temperature that spray cooling easily causes each photovoltaic module 2 in photovoltaic group string is inconsistent, from
And cause mismatch phenomenon.Now the component in photovoltaic power station system/substring level power optimization device 3 detects each light in photovoltaic group string
The maximum power point of component 2 is lied prostrate, and is exported.This measure will eliminate the series and parallel of photovoltaic module 2 brought by temperature mismatch and damage
Lose, improve the generated energy of photovoltaic power station system.
Embodiment 2
Refer to Fig. 8, the basic phase of the water-cooled photovoltaic power station system of water-cooled photovoltaic power station system and embodiment 1 of embodiment 2
Together, its difference is that the water-cooled photovoltaic power station system of embodiment 2 only has monolithic photovoltaic module 2, rather than photovoltaic group string；Its remaining light
The scheme of overhead utility system, the composition of water-cooling system and operation principle with embodiment 1 is consistent.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of water-cooled photovoltaic power station system based on component/substring level power optimization, it includes photovoltaic system and water-cooling system；
The photovoltaic system includes at least one photovoltaic module；It is characterized in that：The photovoltaic system also includes at least one component/substring level
Power optimization device, each component/substring level power optimization device connects at least one photovoltaic module；The power optimization device is
DC/AC converters or DC/DC converters；When the power optimization device is DC/AC converters, all photovoltaic module connections are corresponding
The input of DC/AC converters, the output-parallel of each DC/AC converter together, power network is entered via exchange side apparatus；Should
When power optimization device is DC/DC converters, multiple photovoltaic modulies connect the input of corresponding DC/DC converters, each DC/
The output of DC converters is cascaded, and the input of correspondence inverter, the output of inverter are connected to after formation photovoltaic group string
End enters power network via exchange side apparatus again.
2. the water-cooled photovoltaic power station system of component/substring level power optimization is based on as claimed in claim 1, it is characterised in that：
The water-cooling system carries out water-cooled cooling to the photovoltaic module, and the water-cooling system includes water pump, at least one sparge pipe, at least one
Shower nozzle；At least one shower nozzle is installed, the coolant at water source is delivered to the sparge pipe by the water pump on every sparge pipe, and by the spray
Shower nozzle on water pipe is sprayed from the top of each photovoltaic module.
3. the water-cooled photovoltaic power station system of component/substring level power optimization is based on as claimed in claim 2, it is characterised in that：
When the photovoltaic module is independently installed, a sparge pipe is fixed on the top of the photovoltaic module, and makes corresponding shower nozzle from the photovoltaic group
The top spray of part；When multiple photovoltaic module group strings are installed as photovoltaic group string form, the top of the photovoltaic group string fixes one
Sparge pipe, and corresponding shower nozzle is sprayed from the top of the photovoltaic group string.
4. the water-cooled photovoltaic power station system of component/substring level power optimization is based on as claimed in claim 2, it is characterised in that：
One valve for being used to control shower nozzle to open and close is installed on each shower nozzle；Or, every sparge pipe installs a valve, should
Opened while valve is used to control all shower nozzles on corresponding sparge pipe and simultaneously closed off.
5. the water-cooled photovoltaic power station system of component/substring level power optimization is based on as claimed in claim 2, it is characterised in that：
The water-cooling system also includes Water Sproading groove, and the bottom that the Water Sproading groove is located at the photovoltaic module is used to reclaim spray in the photovoltaic group
Coolant on part, the coolant from the Water Sproading groove returns back to the water pump by water pipe.
6. the water-cooled photovoltaic power station system of component/substring level power optimization is based on as claimed in claim 5, it is characterised in that：
The water-cooling system also includes cooling device, and the cooling device is arranged on the water pipe for being returned again after the coolant cooling to reclaiming
Go to the water pump.
7. the water-cooled photovoltaic plant system based on component/substring level power optimization as described in any one in claim 2 to 6
System, it is characterised in that：The water-cooling system also includes filter, and the filter is used to filter the coolant for entering the water pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621331430.2U CN206302378U (en) | 2016-12-07 | 2016-12-07 | A kind of water-cooled photovoltaic power station system based on component/substring level power optimization |
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| CN201621331430.2U CN206302378U (en) | 2016-12-07 | 2016-12-07 | A kind of water-cooled photovoltaic power station system based on component/substring level power optimization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599712A (en) * | 2018-04-20 | 2018-09-28 | 苏州中康电力开发有限公司 | A kind of novel photovoltaic string formation wiring construction |
| CN112564618A (en) * | 2020-12-03 | 2021-03-26 | 合肥阳光智维科技有限公司 | Cooling control method, device and system for photovoltaic module |
-
2016
- 2016-12-07 CN CN201621331430.2U patent/CN206302378U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599712A (en) * | 2018-04-20 | 2018-09-28 | 苏州中康电力开发有限公司 | A kind of novel photovoltaic string formation wiring construction |
| CN112564618A (en) * | 2020-12-03 | 2021-03-26 | 合肥阳光智维科技有限公司 | Cooling control method, device and system for photovoltaic module |
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