CN206099370U - Photovoltaic system - Google Patents
Photovoltaic system Download PDFInfo
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- CN206099370U CN206099370U CN201621143899.3U CN201621143899U CN206099370U CN 206099370 U CN206099370 U CN 206099370U CN 201621143899 U CN201621143899 U CN 201621143899U CN 206099370 U CN206099370 U CN 206099370U
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- Prior art keywords
- switch
- photovoltaic
- photovoltaic system
- branch road
- power supply
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model provides a photovoltaic system. Photovoltaic system includes photovoltaic cell module, unsteady flow unit, first switch, second switch and switching power supply, wherein, photovoltaic cell module's output is connected through first switch the first end of unsteady flow unit, the electric wire netting is connected through the second switch to the second end of unsteady flow unit, switching power supply has that electric branch road is got to the direct current and electric branch road is got in the interchange, wherein, the electricity point of getting that electric branch road was got to the direct current lies in photovoltaic cell module with between the first switch, the electricity point of getting that electric branch road was got in the interchange lies in between second switch and the electric wire netting. The utility model discloses a standby power loss of the reducible system of photovoltaic system, the fail safe nature of multiplicable system, can guarantee photovoltaic cell module's life.
Description
Technical field
This utility model is related to field of photovoltaic technology, and in particular to a kind of photovoltaic system.
Background technology
Traditional PV air-conditioner, what its photovoltaic system was often designed with conventional inverter as blank, which is opened
Powered-down source is directly from power taking on the dc bus of current transformer.Do not open in air-conditioning and photovoltaic cell component is unsatisfactory for power generation conditions
In the case of (i.e. noenergy output), in order to ensure the detection function of system, dc bus powered all the time (high pressure or city are still needed to
Electricity), and current transformer needs a direct acting to keep DC bus-bar voltage stable in fixed value.
At least there is following defect in this photovoltaic system：During air-conditioner standby, the power consumption of whole system is big, and it is unnecessary to cause
Waste of energy；The security requirement of system can not be met, to the maintenance band inconvenience of system, the feelings of second switch are not disconnected
Under condition, when overhauling to air conditioning unit or photovoltaic cell component part, there is the danger of electric shock；Photovoltaic cell component is easily received
The impact of DC bus-bar voltage and affect the life-span.
Utility model content
Based on above-mentioned present situation, main purpose of the present utility model is to provide a kind of photovoltaic system, and which can solve aforementioned lacking
At least one in falling into.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of photovoltaic system, which includes photovoltaic cell component, current transforming unit, first switch, second switch and switch electricity
Source, wherein,
The outfan Jing first switches of the photovoltaic cell component connect the first end of the current transforming unit,
Second end Jing second switch connection electrical networks of the current transforming unit,
The Switching Power Supply has direct current power taking branch road and exchanges power taking branch road, wherein, the direct current power taking branch road takes
Positioned between the photovoltaic cell component and the first switch, the power taking point of the exchange power taking branch road is located at described the to electricity point
Between two switches and electrical network.
Preferably, also including photovoltaic detector unit, which is arranged between the photovoltaic cell component and the first switch,
For detecting the state of the photovoltaic cell component.
Preferably, the control electricity power supply for also being exported by the Switching Power Supply including control system, the control system, is used in combination
The first switch and the second switch are controlled in output control signal.
Preferably, the control system is connected with the current transforming unit, to detect and control the current transforming unit.
Preferably, the first end of the current transforming unit is joined directly together with its dc bus.
Preferably, the Switching Power Supply includes transformator, and the direct current power taking branch road of the Switching Power Supply is propped up with power taking is exchanged
Road is connected to common power source bus, the former limit of the power source bus connection transformer, the control electricity of the Switching Power Supply output
Exported by the secondary of the transformator.
Preferably, the current transforming unit includes three-phase bridge circuit, and the three-phase bridge circuit includes three-phase bridge arm, per phase
Bridge arm includes with anti-paralleled diode two device for power switching, and described two device for power switching respectively constitute the phase bridge
The upper arm and underarm of arm, the junction point between the upper arm and underarm of each phase bridge arm are used to connect the second switch.
Preferably, the photovoltaic system is three-phase photovoltaic system, and the three-phase line Jing second switches of three phase network connect respectively
The junction point being connected between the upper arm and underarm of each phase bridge arm；
Or, the photovoltaic system is single-phase photovoltaic system, and the two lines road Jing second switches of single-phase electrical network connect respectively
Junction point to the upper arm and underarm of any biphase bridge arm.
Preferably, also including electrical equipment, the electrical equipment connects the first end of the current transforming unit.
Preferably, the electrical equipment is air conditioning unit.
In photovoltaic system of the present utility model, as Switching Power Supply is using double power taking patterns, and direct current is correspondingly set
Side switchs (first switch) and AC switch (second switch), coordinates corresponding detection and control logic, at least with following
Beneficial effect：(1) idling consumption of photovoltaic system can be reduced；(2) security reliability of photovoltaic system can be increased；(3) can ensure
The service life of photovoltaic cell component.
Description of the drawings
Hereinafter with reference to accompanying drawing to being described according to photovoltaic system of the present utility model and its control method.In figure：
Fig. 1 is a kind of schematic diagram of the photovoltaic system of preferred implementation of the present utility model；
Fig. 2 is the schematic diagram of photovoltaic system breaker in middle power supply of the present utility model.
Specific embodiment
To solve the problems, such as the traditional photovoltaic system being previously mentioned in background section, this utility model
There is provided a kind of photovoltaic system.
As shown in figure 1, photovoltaic system of the present utility model include photovoltaic cell component 1, air conditioning unit 2, current transforming unit 3,
First switch 4, second switch 5, and Switching Power Supply (preferred high-voltage electric switch) 6, wherein,
The first end that the outfan Jing first switches 4 of the photovoltaic cell component 1 connect the current transforming unit 3 (in figure is
Left end), the first switch is alternatively referred to as DC side switch,
Second end (being right-hand member in figure) the connection electrical network 9 of Jing second switches 5 of the current transforming unit 3, the second switch also may be used
Referred to as AC is switched,
The Switching Power Supply 6 has direct current power taking branch road 61 and exchanges power taking branch road 62, wherein, the direct current power taking branch road
61 power taking point is located between the photovoltaic cell component 1 and the first switch 8 (i.e. positioned at the front side of first switch), described
The power taking point of exchange power taking branch road 62 is located between the second switch 5 and electrical network 9 (i.e. positioned at the rear side of second switch).
The Switching Power Supply 6 is mainly used for output control electricity, to power to links such as the controls and detection in system.
Photovoltaic system of the present utility model preferably also include electrical equipment, specifically air conditioning unit 2, the electrical equipment
(air conditioning unit 2) connect the first end of the current transforming unit 3.So as to it is empty that photovoltaic system of the present utility model constitutes a kind of photovoltaic
Adjusting system.
As Switching Power Supply of the present utility model is using double power taking patterns, and it is provided with first switch 4 and second switch
5, and two power taking points of Switching Power Supply 6 are respectively positioned at the front side of first switch 4 and the rear side of second switch 5,4 He of first switch
The folding condition of second switch 5 does not affect the power taking of power taking point.Therefore, in air-conditioner standby, can be by first switch 4 and second
Switch 5 disconnects, and so as to will be inverter 3 fully powered-off, its dc bus be no longer powered, thus the overall stand-by power consumption of system can
It is remarkably decreased.
Meanwhile, in the case where first switch 4 and second switch 5 disconnect, to air conditioning unit 2 or photovoltaic cell component 1
When being overhauled, moreover it is possible to be prevented effectively from the danger of electric shock, the safety of system is improve.
In addition, in the case where photovoltaic cell component 1 does not generate electricity, that is, air conditioning unit 2 only rely on the feelings of the power supply of electrical network 9
Under condition, photovoltaic system of the present utility model can also disconnect first switch 4, so as to cut off current transforming unit 3 and photovoltaic cell component 1
Between connection, it is possible thereby to avoid DC bus-bar voltage from impacting the life-span of photovoltaic cell component 1, to extend photovoltaic
The service life of battery component 1.
Preferably, photovoltaic system of the present utility model also includes photovoltaic detector unit 8, and which is arranged on the photovoltaic cell group
Between part 1 and the first switch 4, for detecting the state of the photovoltaic cell component 1.Photovoltaic detector unit 8 for example may be used
To detect the status informations such as the initial voltage of photovoltaic cell component 1, line polarity, such as after first assembling and line maintenance
Detected when going up electricity afterwards, in order to avoid cause system failure.Photovoltaic detector unit 8 can adopt the detection meanss of prior art.
Preferably, photovoltaic system of the present utility model also includes control system 7, and the control system 7 is by the switch electricity
The control electricity power supply of source output, and for output control signal controlling the first switch 4 and the second switch 5.For example,
Control system 7 can make specific control action according to the state of the state of photovoltaic cell component 1 and electrical network 9, for example
Folding of control first switch 4 and/or second switch 5 etc..
For example, the outfan of photovoltaic detector unit 8 can be connected to the control system 7, so as to by photovoltaic detection signal
Transmit into control system 7, to make corresponding control action according to the state of photovoltaic cell component 1.
Preferably, the control system 7 is connected with the current transforming unit 3, to detect and control the current transforming unit 3.
For example, control system 7 obtains the detection signal of current transforming unit 3, for judging the shapes such as voltage, the electric current of photovoltaic cell component 1
The state of state and electrical network 9, sends corresponding control signal then, for controlling current transforming unit 3, to adjust voltage, to reduce
Harmonic componentss etc., make the voltage of the dc bus of current transforming unit 3 meet the requirements.
Further, control system 7 is according to the detection signal from current transforming unit 3, moreover it is possible to judge that photovoltaic cell component 1 is
It is no to meet power generation conditions, and whether generated energy can meet air conditioning unit 2 work requirements etc., open in time to control first
Close 4 folding.
Preferably, the first end (being left end in figure) of the current transforming unit 3 is joined directly together with its dc bus.Therefore, it is empty
Unit 2 is adjusted to be the power taking on dc bus.When first switch 4 is closed, the direct current of Switching Power Supply 6 takes a branch road 61 and also corresponds to
It is the power taking on dc bus.
Fig. 2 shows a kind of schematic diagram of preferred implementation of Switching Power Supply of the present utility model 6.Preferably, it is described
Switching Power Supply 6 includes transformator 64, and the direct current power taking branch road 61 of the Switching Power Supply 6 is connected to power taking branch road 62 is exchanged jointly
Power source bus 63, the former limit of 63 connection transformer 64 of the power source bus, the secondary of the transformator 64 are used to export described
Control electricity.
As shown in Fig. 2 diode is connected on two power taking circuits of direct current power taking branch road 61, to ensure that direct current takes
The polarity of electric branch road 61, can so avoid because the reversed and caused voltage reversal of the circuit of photovoltaic cell component 1 is to follow-up control
System processed etc. causes damage.
It is also shown in FIG. 2, exchange the full-wave rectification bridge that power taking branch road 62 includes that four diodes are constituted, all wave rectification
Two outfans of bridge are connected to power source bus 63 according to polarity, so as to ensure that the electricity for taking from grid side meets polar requirement.When
When electrical network 9 is three phase network, exchange power taking branch road 62 can carry out power taking between arbitrarily biphase.
Preferably, as shown in the structure of dotted line inframe in Fig. 1, the current transforming unit 3 includes three-phase bridge circuit, described three
Phase bridge circuit includes three-phase bridge arm, includes with anti-paralleled diode two device for power switching per phase bridge arm, described two
Individual device for power switching respectively constitutes the upper arm and underarm of the phase bridge arm, and the junction point between the upper arm and underarm of each phase bridge arm is used
In connecting the second switch 5.
Preferably, as shown in figure 1, electrical network 9 be three phase network, thus the photovoltaic system be three-phase photovoltaic system, three-phase
The three-phase line Jing second switches 5 of electrical network are respectively connecting to the junction point between the upper arm and underarm of each phase bridge arm.
Alternatively, electrical network 9 can also be single-phase electrical network, and now, the photovoltaic system is single-phase photovoltaic system, single-phase electricity
The two lines road of net can with Jing second switches 5 be respectively connecting to current transforming unit 3 any biphase bridge arm upper arm and underarm between
Junction point.
On the basis of above-mentioned work, another aspect of the present utility model additionally provides the control of foregoing photovoltaic system
Method processed, which includes step：4 He of first switch is controlled according to the state of the state and/or electrical network 9 of photovoltaic cell component 1
The folding condition of the second switch 5.
By the folding condition for controlling first switch 4 and second switch 5, reduction system standby work(can be conveniently realized
The targets such as the service life of consumption, the security reliability for improving system and prolongation photovoltaic cell component.
Judgement and the judgement to electric network state to the state of photovoltaic cell component 1, can be by 7 basis of control system
Detection signal from current transforming unit 3 is judged.
Preferably, the control method is further included：When the photovoltaic cell component 1 is unsatisfactory for power generation conditions, control
Make the first switch 4 to disconnect.Photovoltaic cell component 1 can so be protected from the impact of grid side voltage, it is ensured that photovoltaic electric
The service life of pond component 1.
Further, in the case where first switch 4 is disconnected, determine to second further according to whether air conditioning unit 2 run
The control strategy of switch 5.
Specifically, in the case of not running air conditioning unit 2, control the second switch 5 and disconnect.That is, simultaneously switching off
Connection between photovoltaic cell component 1 and current transforming unit 3 and the connection between current transforming unit 3 and electrical network 9, now, photovoltaic system
In holding state, dc bus is not charged for system, Switching Power Supply 6 from 9 power taking of AC network, to ensure every detection work(of system
Can be normal.By this control mode, the stand-by power consumption of system can be reduced, the safety of system can be increased again.
Or, when air conditioning unit 2 need operation, control the second switch 5 and close.That is, disconnecting photovoltaic cell group
While connection between part 1 and current transforming unit 3, the connection between current transforming unit 3 and electrical network 9 is kept, will pass through 9 pairs, electrical network
Air conditioning unit 2 are powered, and ensure that air conditioning unit normal operation.
Preferably, the control method also includes：When the photovoltaic cell component 1 meets power generation conditions, control is described
First switch 4 is closed, while control the second switch 5 close, except 9 power-off of non-grid.
In the case where control first switch 4 is closed, the operational mode of whole system includes following two：
Pattern one：Air conditioning unit 2 do not run or the operation of air conditioning unit 2 needs and the generating of the photovoltaic cell component 1
Energy consumption of the amount more than air conditioning unit 2, now, controls the second switch 5 and closes, can send photovoltaic cell component 1
Unnecessary feeds electric energy into electrical network.Under this pattern, mainly photovoltaic cell component 1 is powered to air conditioning unit.
Pattern two：The generated energy of the operation of air conditioning unit 2 needs but the photovoltaic cell component 1 can not meet air conditioning unit 2
Energy consumption, now, control the second switch 5 and close, can from 9 power taking of electrical network with maintain air conditioning unit 2 operation.This mould
Under formula, it is powered to air conditioning unit by electrical network 9 and photovoltaic cell component 1 jointly.
Preferably, the control method also includes：When 9 power-off of electrical network, operation and the photovoltaic are needed air conditioning unit 2
Energy of the generated energy of battery component 1 more than air conditioning unit 2 takes, control the first switch 4 close, while control described second
Switch 5 disconnects.Now, it is powered to air conditioning unit with photovoltaic cell component, meanwhile, by the connection between system and electrical network 9
Disconnect, in order to avoid impacting to electrical network 9, or jeopardize the personal safety of the personnel of maintenance electrical network 9.
To sum up, photovoltaic system of the present utility model and its control method, as Switching Power Supply is using double power taking patterns, and
DC side switch (first switch) and AC switch (second switch) are correspondingly set, coordinate corresponding detection and control to patrol
Volume, at least have the advantages that：
(1) idling consumption of photovoltaic system can be reduced；
(2) security reliability of photovoltaic system can be increased；
(3) service life of photovoltaic cell component can be ensured.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each preferred version can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, without departing from of the present utility model
In the case of ultimate principle, those skilled in the art can be directed to the modification of the various obvious or equivalent that above-mentioned details is made
Or replace, all it is included in right of the present utility model.
Claims (10)
1. a kind of photovoltaic system, it is characterised in that including photovoltaic cell component, current transforming unit, first switch, second switch, with
And Switching Power Supply, wherein,
The outfan Jing first switches of the photovoltaic cell component connect the first end of the current transforming unit,
Second end Jing second switch connection electrical networks of the current transforming unit,
The Switching Power Supply has direct current power taking branch road and exchanges power taking branch road, wherein, the power taking point of the direct current power taking branch road
Between the photovoltaic cell component and the first switch, the power taking point of the exchange power taking branch road is opened positioned at described second
Close and electrical network between.
2. photovoltaic system according to claim 1, it is characterised in that also including photovoltaic detector unit, which is arranged on described
Between photovoltaic cell component and the first switch, for detecting the state of the photovoltaic cell component.
3. photovoltaic system according to claim 1, it is characterised in that also including control system, the control system is by institute
The control electricity power supply of Switching Power Supply output is stated, and is opened controlling the first switch and described second for output control signal
Close.
4. photovoltaic system according to claim 3, it is characterised in that the control system is connected with the current transforming unit,
To detect and control the current transforming unit.
5. photovoltaic system according to claim 1, it is characterised in that the first end of the current transforming unit and its dc bus
It is joined directly together.
6. photovoltaic system according to claim 1, it is characterised in that the Switching Power Supply includes transformator, the switch
The direct current power taking branch road of power supply is connected to common power source bus with power taking branch road is exchanged, the power source bus connection transformer
Former limit, the control electricity of the Switching Power Supply output are exported by the secondary of the transformator.
7. the photovoltaic system according to one of claim 1-6, it is characterised in that the current transforming unit includes three-phase bridge electricity
Road, the three-phase bridge circuit include three-phase bridge arm, include with anti-paralleled diode two power switch devices per phase bridge arm
Part, described two device for power switching respectively constitute the upper arm and underarm of the phase bridge arm, between the upper arm and underarm of each phase bridge arm
Junction point be used for connect the second switch.
8. photovoltaic system according to claim 7, it is characterised in that the photovoltaic system is three-phase photovoltaic system, three-phase
The three-phase line Jing second switches of electrical network are respectively connecting to the junction point between the upper arm and underarm of each phase bridge arm；
Or, the photovoltaic system is single-phase photovoltaic system, and the two lines road Jing second switches of single-phase electrical network are respectively connecting to appoint
The junction point anticipated between the upper arm and underarm of biphase bridge arm.
9. the photovoltaic system according to one of claim 1-6, it is characterised in that also including electrical equipment, the electricity consumption sets
The standby first end for connecting the current transforming unit.
10. photovoltaic system according to claim 9, it is characterised in that the electrical equipment is air conditioning unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143899.3U CN206099370U (en) | 2016-10-21 | 2016-10-21 | Photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143899.3U CN206099370U (en) | 2016-10-21 | 2016-10-21 | Photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099370U true CN206099370U (en) | 2017-04-12 |
Family
ID=58484430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621143899.3U Active CN206099370U (en) | 2016-10-21 | 2016-10-21 | Photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206099370U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300428A (en) * | 2016-10-21 | 2017-01-04 | 珠海格力电器股份有限公司 | A kind of photovoltaic system and control method thereof |
-
2016
- 2016-10-21 CN CN201621143899.3U patent/CN206099370U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300428A (en) * | 2016-10-21 | 2017-01-04 | 珠海格力电器股份有限公司 | A kind of photovoltaic system and control method thereof |
| WO2018072406A1 (en) * | 2016-10-21 | 2018-04-26 | 珠海格力电器股份有限公司 | Photovoltaic system and control method therefor |
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