CN103956970B - Have the photovoltaic confluence device of anti-PID function concurrently - Google Patents
Have the photovoltaic confluence device of anti-PID function concurrently Download PDFInfo
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- CN103956970B CN103956970B CN201410216834.6A CN201410216834A CN103956970B CN 103956970 B CN103956970 B CN 103956970B CN 201410216834 A CN201410216834 A CN 201410216834A CN 103956970 B CN103956970 B CN 103956970B
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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
Abstract
The invention discloses a kind of photovoltaic confluence device having anti-PID function concurrently, it includes conflux circuit, voltage sample catcher, PID controller, voltage changer and DC source, conflux each cathode output end of circuit form total cathode output end after connecing and access DC cabinet or inverter, and each cathode output end of the circuit that confluxes also forms total cathode output end after connecing and accesses DC cabinet or inverter；Wherein, voltage sample catcher, its collection terminal is connected with total cathode output end and total cathode output end of the circuit that confluxes respectively, and its signal output part is connected with the signal input part of PID controller；Voltage changer, its cathode output end ground connection, its cathode output end is connected with total cathode output end of the circuit that confluxes；DC source, it is connected with electrode input end and the negative input of voltage changer respectively；PID controller, its signal output part is connected with the opening and closing signal input part of voltage changer.The present invention can not only realize the function that component string is confluxed, and PID reaction can be suppressed to cause the phenomenon that generated energy is low.
Description
Technical field
The present invention relates to a kind of photovoltaic confluence device having anti-PID function concurrently.
Background technology
At present, solar energy industry is as a kind of low-carbon (LC) regenerative resource, the most flourish, and various countries install
Amount increases year by year, and photovoltaic system has the service life of 25 years after mounting, but the most in the application by different rings
The impact in border, the generated energy of photovoltaic system can produce a certain degree of decay.Wherein when be in hot and humid in the environment of,
If photovoltaic module is chronically under back bias voltage and easily produces the PID phenomenon i.e. problem of potential induction attenuation, when assembly occurs
After PID phenomenon, power can decline to a great extent, and has a strong impact on the generated energy of system, to such an extent as to cannot ensure the returns of investment of system,
Experiment proves that this phenomenon can be recovered under certain conditions simultaneously.
Summary of the invention
The technical problem to be solved is the defect overcoming prior art, it is provided that a kind of light having anti-PID function concurrently
Volt collector-shoe gear, it can not only realize the function that component string is confluxed, and PID reaction can be suppressed to cause generated energy low
Phenomenon.
In order to solve above-mentioned technical problem, the first technical scheme of the present invention is: a kind of photovoltaic having anti-PID function concurrently
Collector-shoe gear, it is characterised in that: it includes conflux circuit, voltage sample catcher, PID controller, voltage changer
And DC source, each electrode input end of the circuit that confluxes is connected with corresponding component string positive pole, each negative pole of the circuit that confluxes
Input is connected with corresponding component string negative pole, and each cathode output end of the circuit that confluxes also forms total cathode output end after connecing
Access DC cabinet or inverter, each cathode output end of the circuit that confluxes and formed after connecing total cathode output end access DC cabinet or
Inverter；Wherein,
Voltage sample catcher, its collection terminal is connected with total cathode output end and total cathode output end of the circuit that confluxes respectively
Connecing, its signal output part is connected with the signal input part of PID controller, is used for obtaining sampled voltage signal and being passed
Pass PID controller；
Voltage changer, its cathode output end ground connection, its cathode output end is connected with total cathode output end of the circuit that confluxes；
DC source, it is connected with electrode input end and the negative input of voltage changer respectively；
PID controller, its signal output part is connected with the opening and closing signal input part of voltage changer, and for according to connecing
The sampled voltage signal received sends corresponding unlatching signal or shutdown signal passes to voltage changer and controls its work；When
During the sampled voltage signal ＜ setting value that PID controller receives, PID controller controls voltage changer work makes voltage
The cathode output end of changer exports backward voltage to total cathode output end of the circuit that confluxes；When PID controller receives
During sampled voltage signal >=setting value, PID controller controls voltage changer and quits work.
Being charged DC source in time further for the electricity that can utilize photovoltaic module string, this has anti-PID merit concurrently
The photovoltaic confluence device of energy also includes charging control circuit, and described DC source is rechargeable battery, described charging
The power input of battery by charging control circuit respectively with total cathode output end and total cathode output end of the circuit that confluxes
It is connected.
Further for making this photovoltaic confluence device lightning protection function, it is to avoid be struck by lightning, this has anti-PID function concurrently
Photovoltaic confluence device also includes that lightning protection device, the two poles of the earth of described lightning protection device are connected to conflux total cathode output end of circuit
With on total cathode output end.
Further for the circuit that confluxes being monitored, the described circuit that confluxes connects and has supervisory circuit of confluxing.
In order to solve above-mentioned technical problem, the second technical scheme of the present invention is: a kind of photovoltaic having anti-PID function concurrently
Collector-shoe gear, it includes conflux circuit, time control circuit, voltage changer and DC source, the circuit that confluxes each just
Pole input is connected with corresponding component string positive pole, each negative input of the circuit that confluxes and corresponding component string negative pole phase
Connecting, each cathode output end of the circuit that confluxes also forms total cathode output end after connecing and accesses DC cabinet or inverter, and conflux electricity
Each cathode output end on road also forms total cathode output end after connecing and accesses DC cabinet or inverter；Wherein,
Voltage changer, its cathode output end ground connection, its cathode output end is connected with total cathode output end of the circuit that confluxes；
DC source, it is connected with electrode input end and the negative input of voltage changer respectively；
Time control circuit, its signal output part is connected with the opening and closing signal input part of voltage changer, when being used for setting
Between section send and corresponding open signal or shutdown signal passes to voltage changer and controls its work；When voltage changer receives
To when opening signal, voltage changer work makes the cathode output end of voltage changer to total cathode output end of the circuit that confluxes
Output backward voltage；When voltage changer receives shutdown signal, voltage changer quits work.
Being charged DC source in time further for the electricity that can utilize photovoltaic module string, this has anti-PID merit concurrently
The photovoltaic confluence device of energy also includes charging control circuit, and described DC source is rechargeable battery, described charging
The power input of battery by charging control circuit respectively with total cathode output end and total cathode output end of the circuit that confluxes
It is connected.
Further for making this photovoltaic confluence device lightning protection function, it is to avoid be struck by lightning, this has anti-PID function concurrently
Photovoltaic confluence device also includes that lightning protection device, the two poles of the earth of described lightning protection device are connected to conflux total cathode output end of circuit
With on total cathode output end.
Further for the circuit that confluxes being monitored, the described circuit that confluxes connects and has supervisory circuit of confluxing.
After have employed technique scheme, the combining functions in the main circuit that confluxes photovoltaic system to be realized wiring, N is gone here and there group
It is a road output that part string collects, and accesses in subordinate's DC cabinet or inverter, reduces cable usage amount and facilitate maintenance etc., light
Photovoltaic module in volt system it is possible that potential induction attenuation phenomenon, causes system under some high temperature, high humidity environment
Power declines to a great extent, possible loss 40%-70% time serious, makes system generated energy heavy discount, system install in this
After bright device, device the signal of device unlocking condition will be detected at night or device after to system in component string decay
Recovery, thus weaken even elimination PID problem.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of the first structure of the photovoltaic confluence device having anti-PID function concurrently of the present invention；
Fig. 2 is the circuit connection diagram of the second structure of the photovoltaic confluence device having anti-PID function concurrently of the present invention.
Detailed description of the invention
It is clearly understood to make present disclosure be easier to, below according to specific embodiment and combine accompanying drawing, to this
Invention is described in further detail.
Embodiment one
As it is shown in figure 1, a kind of photovoltaic confluence device having anti-PID function concurrently, it includes conflux circuit 1, voltage sample
Catcher 2, PID controller 3, voltage changer 4 and DC source 6, each electrode input end of the circuit 1 that confluxes and phase
The component string positive pole answered is connected, and each negative input of the circuit 1 that confluxes is connected with corresponding component string negative pole, confluxes
Each cathode output end of circuit 1 also forms total cathode output end after connecing and accesses DC cabinet or inverter, each of circuit 1 of confluxing
Cathode output end also forms total cathode output end after connecing and accesses DC cabinet or inverter；Wherein,
Voltage sample catcher 2, its collection terminal respectively with total cathode output end of the circuit 1 that confluxes and total cathode output end phase
Connecting, its signal output part is connected with the signal input part of PID controller 3, is used for obtaining sampled voltage signal and inciting somebody to action
It passes to PID controller 3；
Voltage changer 4, its cathode output end ground connection, total cathode output end phase of its cathode output end and the circuit 1 that confluxes
Connect；
DC source 6, it is connected with electrode input end and the negative input of voltage changer 4 respectively；
PID controller 3, its signal output part is connected with the opening and closing signal input part of voltage changer 4, and for root
Send corresponding unlatching signal according to the sampled voltage signal received or shutdown signal passes to voltage changer 4 and controls its work
Make；When the sampled voltage signal ＜ setting value that PID controller 3 receives, PID controller 3 controls voltage changer
4 work make the cathode output end of voltage changer 4 export backward voltage to total cathode output end of the circuit 1 that confluxes；Work as PID
During sampled voltage signal >=setting value that controller 3 receives, PID controller 3 controls voltage changer 4 and quits work.
In order to utilize the electricity of photovoltaic module string in time DC source 6 to be charged, as it is shown in figure 1, have concurrently anti-
The photovoltaic confluence device of PID function also includes charging control circuit 5, and DC source 6 is rechargeable battery, charged electrical
The power input in pond by charging control circuit 5 respectively with total cathode output end and total cathode output end of the circuit 1 that confluxes
It is connected.
In order to make this photovoltaic confluence device lightning protection function, it is to avoid be struck by lightning, as it is shown in figure 1, have anti-PID merit concurrently
Can photovoltaic confluence device also include that lightning protection device 7, the two poles of the earth of lightning protection device 7 be connected to conflux total positive pole of circuit 1 is defeated
Go out on end and total cathode output end.
In order to the circuit 1 that confluxes is monitored, have, as it is shown in figure 1, the circuit 1 that confluxes connects, supervisory circuit of confluxing
1-1。
In photovoltaic system installation process, component string being accessed by the circuit 1 that confluxes of this device, component string positive pole accesses
Positive pole, component string negative pole accesses negative pole, and the corresponding sequence number of one_to_one corresponding, depict only 8 tunnels and import in this programme figure,
In reality, application has 3-20 string grade all can realize；Device outfan counts subordinate's DC cabinet or photovoltaic DC-to-AC converter, system
After installation, actual running is as follows:
Daytime, assembly and system are properly functioning, system generate electricity, the circuit 1 that confluxes in device, the observation circuit 1-1 that confluxes,
Lightning protection devices 7 etc. are properly functioning, it is ensured that the reliability service of system, and the signal that now voltage sample catcher 2 is collected meets and sets
Provisioning request, it is not necessary to start PID controller 3 and enter further work, and then without carrying out assembly applying backward voltage.
When evening or overcast and rainy in the case of, system does not generates electricity or generated energy is extremely low, and the voltage sample catcher 2 in device is searched
Collection is the least to the voltage of component string, and when less than a certain setting value, voltage sample catcher 2 sends signal Control PID
Controller 3 starts, and PID controller 3 controls voltage changer 4 and starts working, and voltage changer 4 is by from unidirectional current
Power taking at source 6, and make to meet and use requirement through series voltage, current transformation, and then component string is applied backward voltage,
Now, component string forms positive bias over the ground under the voltage effect that voltage changer 4 provides, because potential induction attenuation is made
The assembly of success rate loss starts to recover.
When voltage sample catcher 2 detects that voltage signal is greater than or equal to setting value, Control PID controller 3 disconnects
Voltage changer 4, quits work.
When DC source is rechargeable battery, when its electric energy is not enough to maintain continuous print voltage application time, charging control circuit
5 generatings taking photovoltaic system when need to work by day are that rechargeable battery is charged, it is ensured that have enough electric energy.
Embodiment two
As in figure 2 it is shown, a kind of photovoltaic confluence device having anti-PID function concurrently, it includes conflux circuit 1, time control
Circuit 8, voltage changer 4 and DC source 6, each electrode input end of the circuit 1 that confluxes and corresponding component string positive pole
Being connected, each negative input of the circuit 1 that confluxes is connected with corresponding component string negative pole, each positive pole of the circuit 1 that confluxes
Outfan also forms total cathode output end after connecing and accesses DC cabinet or inverter, and each cathode output end of the circuit 1 that confluxes also connects
The total cathode output end of rear formation accesses DC cabinet or inverter；Wherein,
Voltage changer 4, its cathode output end ground connection, total cathode output end phase of its cathode output end and the circuit 1 that confluxes
Connect；
DC source 6, it is connected with electrode input end and the negative input of voltage changer 4 respectively；
Time control circuit 8, its signal output part is connected with the opening and closing signal input part of voltage changer 4, is used for setting
The section of fixing time sends corresponding unlatching signal or shutdown signal passes to voltage changer 4 and controls its work；Work as voltage transformation
When device 4 receives unlatching signal, voltage changer 4 work makes the cathode output end of voltage changer 4 to the circuit 1 that confluxes
Total cathode output end output backward voltage；When voltage changer 4 receives shutdown signal, voltage changer 4 stops
Work.
In order to utilize the electricity of photovoltaic module string in time DC source 6 to be charged, as in figure 2 it is shown, this has concurrently
The photovoltaic confluence device of anti-PID function also includes charging control circuit 5, and DC source 6 is rechargeable battery, charging
The power input of battery passes through the charging control circuit 5 total cathode output end and total negative pole respectively with the circuit 1 that confluxes and exports
End is connected.
This photovoltaic confluence device having anti-PID function concurrently also includes lightning protection device 7, as in figure 2 it is shown, the two poles of the earth of lightning protection device 7
It is connected to conflux on total cathode output end of circuit 1 and total cathode output end.
As in figure 2 it is shown, conflux, circuit 1 connects and have supervisory circuit 1-1 of confluxing.
PID controller 3 and voltage sample catcher 2 are replaced with time control circuit 8 by the present embodiment, thus when utilizing
Between control circuit 8 replace PID controller 3 and the function of voltage sample catcher 2, do not generate electricity when evening, as control
20:00 05:00 in the morning time period internal voltage transducer 4 in evening works, remaining time voltage changer 4 the most not work
Make.
Particular embodiments described above, to present invention solves the technical problem that, technical scheme and beneficial effect entered
One step describes in detail, be it should be understood that the specific embodiment that the foregoing is only the present invention, is not limited to
The present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should wrap
Within being contained in protection scope of the present invention.
Claims (6)
1. the photovoltaic confluence device having anti-PID function concurrently, it is characterised in that: it includes conflux circuit (1), electricity
Pressure sample collection device (2), PID controller (3), voltage changer (4) and DC source (6), the circuit that confluxes (1)
Each electrode input end be connected with corresponding component string positive pole, each negative input of the circuit that confluxes (1) is with corresponding
Component string negative pole is connected, and each cathode output end of the circuit that confluxes (1) also forms total cathode output end after connecing and accesses direct current
Cabinet or inverter, each cathode output end of the circuit that confluxes (1) also forms total cathode output end after connecing and accesses DC cabinet or inverse
Become device；Wherein,
Voltage sample catcher (2), its collection terminal is defeated with total cathode output end of the circuit that confluxes (1) and total negative pole respectively
Going out end to be connected, its signal output part is connected with the signal input part of PID controller (3), is used for obtaining sampling electricity
Pressure signal also passes it to PID controller (3)；
Voltage changer (4), its cathode output end ground connection, its cathode output end is defeated with total negative pole of the circuit that confluxes (1)
Go out end to be connected；
DC source (6), it is connected with electrode input end and the negative input of voltage changer (4) respectively；
PID controller (3), its signal output part is connected with the opening and closing signal input part of voltage changer (4), and
Voltage changer (4) is passed to for sending corresponding unlatching signal or shutdown signal according to the sampled voltage signal received
Control its work；When the sampled voltage signal ＜ setting value that PID controller (3) receives, PID controller (3)
Controlling voltage changer (4) work makes the cathode output end of voltage changer (4) to total negative pole of the circuit that confluxes (1)
Outfan output backward voltage；When sampled voltage signal >=setting value that PID controller (3) receives, PID is controlled
Device processed (3) controls voltage changer (4) and quits work；
Also include charging control circuit (5), and described DC source (6) is rechargeable battery, described charged electrical
The power input in pond by charging control circuit (5) respectively with total cathode output end and total negative pole of the circuit that confluxes (1)
Outfan is connected.
The photovoltaic confluence device having anti-PID function concurrently the most according to claim 1, it is characterised in that: also include
Lightning protection device (7), the two poles of the earth of described lightning protection device (7) are connected to conflux total cathode output end of circuit (1) and total
On cathode output end.
The photovoltaic confluence device having anti-PID function concurrently the most according to claim 1 and 2, it is characterised in that: institute
The circuit that confluxes (1) stated connects and has supervisory circuit of confluxing (1-1).
4. the photovoltaic confluence device having anti-PID function concurrently, it is characterised in that: it include confluxing circuit (1), time
Between control circuit (8), voltage changer (4) and DC source (6), each electrode input end of the circuit that confluxes (1) with
Corresponding component string positive pole is connected, and each negative input of the circuit that confluxes (1) is connected with corresponding component string negative pole,
Conflux each cathode output end of circuit (1) form total cathode output end after connecing and access DC cabinet or inverter, and conflux electricity
Each cathode output end on road (1) also forms total cathode output end after connecing and accesses DC cabinet or inverter；Wherein,
Voltage changer (4), its cathode output end ground connection, its cathode output end is defeated with total negative pole of the circuit that confluxes (1)
Go out end to be connected；
DC source (6), it is connected with electrode input end and the negative input of voltage changer (4) respectively；
Time control circuit (8), its signal output part is connected with the opening and closing signal input part of voltage changer (4),
Send corresponding open signal or shutdown signal passes to voltage changer (4) and controls its work for setting the time period；
When voltage changer (4) receives unlatching signal, voltage changer (4) work just makes voltage changer (4)
Pole outfan exports backward voltage to total cathode output end of the circuit that confluxes (1)；When voltage changer (4) receives pass
When closing signal, voltage changer (4) quits work；
Also include charging control circuit (5), and described DC source (6) is rechargeable battery, described charged electrical
The power input in pond by charging control circuit (5) respectively with total cathode output end and total negative pole of the circuit that confluxes (1)
Outfan is connected.
The photovoltaic confluence device having anti-PID function concurrently the most according to claim 4, it is characterised in that: also include
Lightning protection device (7), the two poles of the earth of described lightning protection device (7) are connected to conflux total cathode output end of circuit (1) and total
On cathode output end.
6. according to the photovoltaic confluence device having anti-PID function concurrently described in claim 4 or 5, it is characterised in that: institute
The circuit that confluxes (1) stated connects and has supervisory circuit of confluxing (1-1).
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| CN104506130A (en) * | 2014-11-20 | 2015-04-08 | 晶澳(扬州)太阳能光伏工程有限公司 | PID resistant device for solar photovoltaic component using non-isolated inverter |
| CN104682858B (en) * | 2015-02-07 | 2017-09-22 | 杭州桑尼能源科技股份有限公司 | Photovoltaic high pressure induced attenuation effect (PID) eliminates circuit and its method |
| CN105591609B (en) * | 2015-12-31 | 2018-06-29 | 北京天诚同创电气有限公司 | PID processing method and system of photovoltaic system |
| CN106849862A (en) * | 2017-03-17 | 2017-06-13 | 奥特斯维能源（太仓）有限公司 | Photovoltaic conflux system with charge function |
| CN106953593B (en) * | 2017-04-10 | 2019-06-21 | 上海质卫环保科技有限公司 | The easy self-powered anti-PID device of solar battery and its control method |
| CN106941261A (en) * | 2017-04-10 | 2017-07-11 | 上海质卫环保科技有限公司 | Intelligent junction box with anti-PID functions |
| CN107493057A (en) * | 2017-09-22 | 2017-12-19 | 北京铂阳顶荣光伏科技有限公司 | The electric regulating system and method for a kind of potential induction attenuation of photovoltaic generation |
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Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Patentee after: TRINA SOLAR Co.,Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Patentee before: trina solar Ltd. |
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Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Patentee after: trina solar Ltd. Address before: Tianhe Electronic Industrial Park Road 213022 north of Jiangsu Province, Changzhou City, No. 2 Patentee before: CHANGZHOU TRINA SOLAR ENERGY Co.,Ltd. |