CN207853841U - A kind of photovoltaic generation elastic controller - Google Patents
A kind of photovoltaic generation elastic controller Download PDFInfo
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- CN207853841U CN207853841U CN201721872357.4U CN201721872357U CN207853841U CN 207853841 U CN207853841 U CN 207853841U CN 201721872357 U CN201721872357 U CN 201721872357U CN 207853841 U CN207853841 U CN 207853841U
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- photovoltaic
- reverse current
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a kind of photovoltaic generation elastic controller in photovoltaic generation control technology field, including several photovoltaic generation group serializer circuits, photovoltaic generation group serializer circuit includes multiple photovoltaic electrification components being connected in series with；Current sensor, current sensor detect the reverse current information in photovoltaic generating set serializer circuit and feed back to reverse current controller；Automatic protector, reverse current controller are blocked and are isolated to photovoltaic generation group serializer circuit according to the reverse current information control automatic protector received, meanwhile, the isolation and blocking to photovoltaic generation group serializer circuit can be eliminated；Wherein, each photovoltaic generation group serializer circuit is independently with there are one current sensor and automatic protectors；Reverse current is detected and is controlled using the elastic controller；While the utility model can detect and eliminate reverse current automatically, ensure photovoltaic system normal operating conditions, improves the utilization rate of photovoltaic electric energy.
Description
Technical field
The utility model belongs to photovoltaic generation control technology field, more particularly to a kind of photovoltaic generation elastic controller.
Background technology
In recent years, photovoltaic microgrid is quickly grown, and more and more photovoltaic micro-grid power generation systems are linked into power grid, photovoltaic hair
The subsystems included by DC terminal in electric system have：Photovoltaic panel array string formation system, header box and DC-DC conversion
Device etc., many parallel photovoltaic generation group serializer circuits are connected to the direct-flow input end of same concentration inverter, light by header box
Volt generating set serializer circuit is made of the photovoltaic electrification component that several are serially connected, but is matched by photovoltaic generating set serializer circuit
The influence of shadow is hidden with part, some photovoltaic panel array string formations cannot not only generate electricity, instead at " load " of absorbed power, electric current
Direction is reversed to generate reverse current, and reverse current can lead to photovoltaic plate array " hot spot phenomenon " so that the power generation of system
Reliability is substantially reduced by the undesirable influence of a certain photovoltaic cells group working condition, to ensure entire photovoltaic system
Optimum efficiency and electric production capacity.
In order to eliminate the influence that reverse current generates electricity to photovoltaic system, in the prior art, on photovoltaic generation group serializer circuit
The interface box for simply adding a photovoltaic array, is monitored every a string of photovoltaic string formation, such as wherein there is string formation work
Abnormal, system will pass to this information on remote controllers, while can stop work by this string by remote control
Work, or staff is reminded note that still cannot achieve automatic elimination reverse current and add automatically again by sound-light alarm
Enter this string of function.
Utility model content
For the defects in the prior art, the purpose of the utility model is to overcome above-mentioned deficiencies in the prior art
Place, a kind of photovoltaic generation elastic controller is provided, solve after can not eliminating reverse current automatically in the prior art by its from
Dynamic the technical issues of electricity generation system is added, while the utility model can detect and eliminate reverse current automatically, ensures photovoltaic system
System normal operating conditions, improves the utilization rate of photovoltaic electric energy.
What the purpose of this utility model was realized in：A kind of photovoltaic generation elastic controller, including
Several photovoltaic generation group serializer circuits, the photovoltaic generation group serializer circuit include multiple photovoltaic generation groups being connected in series with
Part；
Current sensor, the current sensor detect the reverse current information in photovoltaic generating set serializer circuit and feed back to
Reverse current controller；
Automatic protector, the reverse current controller control automatic protector pair according to the reverse current information received
Photovoltaic generation group serializer circuit is blocked and is isolated, meanwhile, the isolation and blocking to photovoltaic generation group serializer circuit can be eliminated；
Wherein, each photovoltaic generation group serializer circuit is independently with there are one current sensor and automatic protectors.
In order to realize that the real-time detection of electric current, the high-pressure side of any photovoltaic generation group serializer circuit connect current sensor
Anode, current sensor cathode connection DC-to-dc converter one end, the other end of the DC-to-dc converter
It is connect with the input terminal of automatic protector.
In order to realize that the automatic elimination of reverse current in photovoltaic generating system, the automatic protector include protection circuit,
The protection circuit includes control switch one, the anode of the cathode connection control switch two of the control switch one, the control
Switch two cathode connection photovoltaic generation group serializer circuit low-pressure end, control switch one control terminal one and control terminal two with instead
It is connected to current controller；When being high voltage at the control terminal one of the reverse current controller drive control switch one, control
Switch one is connected；When being high voltage at the control terminal two of reverse current controller drive control switch one, control switch one ends；
The control terminal one and control terminal two of the control switch two are connect with reverse current controller；Reverse current controller driving control
When being high voltage at the control terminal one of system switch two, control switch two is connected；Reverse current controller drive control switch two
When being high voltage at control terminal two, control switch two ends；The other end of the DC-to-dc converter and control switch one
Anode connection.
It is described automatic in order to make the photovoltaic generation group serializer circuit after elimination reverse current rejoin in photovoltaic generating system
Protector further includes self-checking circuit, and the self-checking circuit includes control switch three, the anode connection direct current-of the control switch three
The other end of direct current transducer, cathode connection self-test resistance one end of control switch three, the other end connection of the self-test resistance
The low-pressure end of photovoltaic generation group serializer circuit, the control terminal one and control terminal two for controlling switch three connect with negative-phase sequence curent controller
It connects, when being high voltage at the control terminal one of negative-phase sequence curent controller drive control switch three, control switch three is connected；Negative-phase sequence curent
When being high voltage at the control terminal two of controller drive control switch three, control switch three ends；In this design, current sensor
Detect that no reverse current signal, reverse current controller drive control switch three are connected, while reverse current controller is examined
Measure self-checking circuit it is logical when（Illustrate that the photovoltaic generation group serializer circuit generates electricity again at this time）, the driving control of negative-phase sequence curent controller
It makes switch two to end, so that the photovoltaic generation group serializer circuit is no longer isolated, which is added to photovoltaic generation
It goes to generate electricity again in system.
Damage of the reverse current to photovoltaic electrification component in order to prevent, the photovoltaic generation group serializer circuit further include blocking two
Pole pipe, the high-pressure side for the photovoltaic electrification component being serially connected and the anode of blocking diode connect, the cathode of blocking diode
Connect one end of current sensor.
In order to realize independent protective of each automatic protector to corresponding photovoltaic generation group serializer circuit, each photovoltaic
The low-pressure end of generating set serializer circuit links together, and the cathode of each control switch one links together.
When utility model works, direct current transducer detects the reverse current of photovoltaic generating set serializer circuit and will detection in real time
To reverse current information be sent to reverse current controller；Reverse current signal is judged whether there is, if believing without reverse current
Number, if not detecting reverse current, whether reverse current controller detects self-checking circuit connection, if certain self-checking circuit is connected,
Reverse current controller drives the corresponding conducting of control switch one, drives corresponding control switch three to end while controlling corresponding
Switch two is controlled to end；Otherwise, reverse current controller and automatic protector do not do any action, photovoltaic generation group serializer circuit hair
Electricity；If there is reverse current signal in a certain photovoltaic generation group serializer circuit, reverse current controller controls all one section of control switches
Only, meanwhile, reverse current controller drives corresponding control switch two to be connected, and makes the photovoltaic generation group serializer circuit and other photovoltaics
Generating set serializer circuit is isolated；Detect whether the above-mentioned photovoltaic generation group serializer circuit for having negative-phase sequence curent signal still has reverse current letter
Number, if detecting do not have reverse current signal in the photovoltaic generation group serializer circuit, reverse current controller drives other no problems
The corresponding control switch one of photovoltaic generation group serializer circuit be connected, reverse current controller drives corresponding control switch three to lead
Logical, if reverse current controller detects that self-checking circuit is logical, reverse current controller drives corresponding control switch two to end
And corresponding control switch one is connected, above-mentioned photovoltaic generation group serializer circuit is no longer isolated, and the photovoltaic generation group serializer circuit is automatic
Again it generates electricity；Cycle executes above step.
Compared with prior art, the technique effect that the utility model has is：In the utility model by current sensor,
The combination of DC-to-dc converter, automatic protector and reverse-current protection device is arranged, automatic to detect reverse current and disappear automatically
Except reverse current, ensure the normal operating conditions of photovoltaic generating system, improves the stability of photovoltaic generating system power generation and reliable
Property, extend the effective time of system, after eliminating reverse current, corresponding photovoltaic generation string formation electric current can be rejoined light
Photovoltaic generating system ensures photovoltaic electric energy production to the maximum extent.
Description of the drawings
Fig. 1 is reverse current feedback control loop general structure schematic diagram in the utility model.
Fig. 2 is the physical circuit schematic diagram of photovoltaic generating system in the utility model.
Specific implementation mode
With reference to specific embodiment, the utility model is described in further detail.
A kind of photovoltaic generation elastic controller as depicted in figs. 1 and 2, including
Several photovoltaic generation group serializer circuits, photovoltaic generation group serializer circuit include at least one photovoltaic generation group being connected in series with
Part；
Current sensor, current sensor detect the reverse current information in photovoltaic generating set serializer circuit and feed back to reversed
Current controller；
Automatic protector, reverse current controller control automatic protector to photovoltaic according to the reverse current information received
Generating set serializer circuit is blocked and is isolated, meanwhile, the isolation and blocking to photovoltaic generation group serializer circuit can be eliminated；
Wherein, each photovoltaic generation group serializer circuit is independently with there are one current sensor and automatic protector, photovoltaic generations
The number of group serializer circuit is at least 1.
In order to realize that the automatic elimination of reverse current in photovoltaic generating system, automatic protector include protection circuit, protection
Circuit includes control switch one, the anode of the cathode connection control switch two of control switch one, the cathode connection of control switch two
The low-pressure end of photovoltaic generation group serializer circuit, the control terminal one and control terminal two for controlling switch one connect with reverse current controller
It connects；When being high voltage at the control terminal one of reverse current controller drive control switch one, control switch one is connected；Reverse current
When being high voltage at the control terminal two of controller drive control switch one, control switch one ends；Control the control terminal of switch two
One and control terminal two connect with reverse current controller；It is at the control terminal one of reverse current controller drive control switch two
When high voltage, control switch two is connected；When being high voltage at the control terminal two of reverse current controller drive control switch two, control
Switch two is made to end；In order to realize that the real-time detection of electric current, the high-pressure side of any photovoltaic generation group serializer circuit connect current sense
The anode of device, current sensor cathode connection DC-to-dc converter one end, the other end of DC-to-dc converter with
Control the anode connection of switch one.
In order to make the photovoltaic generation group serializer circuit after elimination reverse current rejoin in photovoltaic generating system, automatic protection
Device further includes self-checking circuit, and self-checking circuit includes control switch three, the anode connection DC-to-dc converter of control switch three
The other end, cathode connection self-test resistance one end of control switch three, the other end of self-test resistance connect photovoltaic generation group serializer circuit
Low-pressure end, control switch three control terminal one and control terminal two connect with negative-phase sequence curent controller, negative-phase sequence curent controller
When being high voltage at the control terminal one of drive control switch three, control switch three is connected；Negative-phase sequence curent controller drive control is opened
When being high voltage at the control terminal two of pass three, control switch three ends.
Damage of the reverse current to photovoltaic electrification component in order to prevent, photovoltaic generation group serializer circuit further include blocking two poles
Pipe, the high-pressure side for the photovoltaic electrification component being serially connected and the anode of blocking diode connect, and the cathode of blocking diode connects
Connect one end of current sensor.
In order to realize each automatic protector to the independent protective of corresponding photovoltaic generation group serializer circuit, each photovoltaic generation
The low-pressure end of group serializer circuit links together, and the cathode of each control switch one links together.
Wherein, the concrete structure of the photovoltaic generating system in the utility model is that the cathode of control switch one connects direct current
One end of one end and inverter of header box capacitance, the low-pressure end of photovoltaic generation group serializer circuit is held to connect DC terminal header box capacitance
The other end and inverter the other end, inverter will feed electric energy into exchange end at, to power to AC network；In addition, anti-
Microcontroller can be selected to current controller.
A specific embodiment is enumerated below to illustrate the course of work of the utility model, as shown in Fig. 2, photovoltaic generation
There is n photovoltaic generation group serializer circuit in system, reverse current, other photovoltaic generations occurs in first photovoltaic generation group serializer circuit
There is not reverse current in group serializer circuit, and reverse current controller drive control switch one ends, and makes all generating set serializer circuits
It is process is-then temporarily-suspended, reverse current controller drives control switch two corresponding with the first photovoltaic generation group serializer circuit to be connected, and makes
First photovoltaic generation group serializer circuit is isolated with other groups of serializer circuits, after current sensor shows that reverse current disappears, reversed electricity
The corresponding control switch of other generating set serializer circuits one, which is connected, in stream controller comes to DC terminal header box capacitance continuation generating-charging,
To maintain photovoltaic generating system to work normally, meanwhile, the corresponding control switch three of the first photovoltaic generation group serializer circuit of driving is connected,
The self-checking circuit that is influenced by reverse current is connected, this photovoltaic generation group serializer circuit is in isolation, if it is damaging therebetween,
It can wait to be repaired, or be eliminated if it is blocking, photovoltaic circuit generates electricity, connect with photovoltaic generation group serializer circuit one again automatically
Current sensor continuation monitor the circuit current signal in real time, above one for reverse current resilient controller executes week
Phase；In addition, in each beginning for executing the period, if not detecting reverse current, the detection of reverse current resilient controller is
Whether the no self-checking circuit connection for having certain photovoltaic string formation, if certain self-checking circuit is connected, occurred reversely in the period before explanation
Electric current, the string formation is existing still in isolation, and present Failure elimination has been able to normal power generation, so passing through self-checking circuit energy
Detect positive generation current signal, in the case, reverse current resilient controller is connected automatic protector and controls switch one
Make it be incorporated to electricity-generating circuit and simultaneously switch off protector control switch three to disconnect self-checking circuit the string formation is connected.
Pass through current sensor, DC-to-dc converter, automatic protector and reverse-current protection device in the utility model
Combination setting, the automatic reverse current that detects simultaneously eliminates reverse current, ensures the normal operating conditions of photovoltaic generating system automatically,
The stability and reliability for improving photovoltaic generating system power generation, extend the effective time of system, can after eliminating reverse current
Corresponding photovoltaic generation string formation electric current is rejoined into photovoltaic generating system, ensures photovoltaic electric energy production to the maximum extent.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this
For the technical staff in field according to disclosed technology contents, not needing performing creative labour can be special to some of which technology
Sign makes some and replaces and deform, these are replaced and deformation is within the protection scope of the present utility model.
Claims (6)
1. a kind of photovoltaic generation elastic controller, including several photovoltaic generation group serializer circuits, the photovoltaic generation group serializer circuit
Including multiple photovoltaic electrification components being connected in series with, which is characterized in that
Including current sensor, the current sensor detects the reverse current information in photovoltaic generating set serializer circuit and feeds back to
Reverse current controller；
Automatic protector, the reverse current controller control automatic protector to photovoltaic according to the reverse current information received
Generating set serializer circuit is blocked and is isolated, meanwhile, the isolation and blocking to photovoltaic generation group serializer circuit can be eliminated；
Wherein, each photovoltaic generation group serializer circuit is independently with there are one current sensor and automatic protectors.
2. a kind of photovoltaic generation elastic controller according to claim 1, which is characterized in that any photovoltaic generation
The anode of the high-pressure side connection current sensor of group serializer circuit, the one of the cathode connection DC-to-dc converter of current sensor
End, the other end of the DC-to-dc converter and the input terminal of automatic protector connect.
3. a kind of photovoltaic generation elastic controller according to claim 2, which is characterized in that the automatic protector packet
Protection circuit is included, the protection circuit includes control switch one, and the cathode connection control switch two of the control switch one is just
Pole, the low-pressure end of the cathode connection photovoltaic generation group serializer circuit of the control switch two, controls control terminal one and the control of switch one
End two processed is connect with reverse current controller；It is height at the control terminal one of the reverse current controller drive control switch one
When voltage, control switch one is connected；When being high voltage at the control terminal two of reverse current controller drive control switch one, control
Switch one ends；The control terminal one and control terminal two of the control switch two are connect with reverse current controller；Reverse current
When being high voltage at the control terminal one of controller drive control switch two, control switch two is connected；Reverse current controller drives
When being high voltage at the control terminal two of control switch two, control switch two ends；The other end of the DC-to-dc converter with
Control the anode connection of switch one.
4. a kind of photovoltaic generation elastic controller according to claim 2 or 3, which is characterized in that the automatic protection
Device further includes self-checking circuit, and the self-checking circuit includes control switch three, the anode connection DC-DC of the control switch three
The other end of converter, cathode connection self-test resistance one end of control switch three, the other end of the self-test resistance connect photovoltaic
The low-pressure end of generating set serializer circuit, the control terminal one and control terminal two for controlling switch three are connect with negative-phase sequence curent controller, instead
When being high voltage at the control terminal one of phase current controller drive control switch three, control switch three is connected；Negative-phase sequence curent controls
When being high voltage at the control terminal two of device drive control switch three, control switch three ends.
5. a kind of photovoltaic generation elastic controller according to claim 4, which is characterized in that the photovoltaic generation string formation
Circuit further includes blocking diode, and the high-pressure side for the photovoltaic electrification component being serially connected and the anode of blocking diode connect,
One end of the cathode connection current sensor of blocking diode.
6. a kind of photovoltaic generation elastic controller according to claim 4, which is characterized in that each photovoltaic generation
The low-pressure end of group serializer circuit links together, and the cathode of each control switch one links together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872357.4U CN207853841U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic generation elastic controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872357.4U CN207853841U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic generation elastic controller |
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| Publication Number | Publication Date |
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| CN207853841U true CN207853841U (en) | 2018-09-11 |
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| CN201721872357.4U Active CN207853841U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic generation elastic controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947736A (en) * | 2017-12-28 | 2018-04-20 | 扬州华鼎电器有限公司 | A kind of photovoltaic generation elastic controller and its control method |
-
2017
- 2017-12-28 CN CN201721872357.4U patent/CN207853841U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947736A (en) * | 2017-12-28 | 2018-04-20 | 扬州华鼎电器有限公司 | A kind of photovoltaic generation elastic controller and its control method |
| CN107947736B (en) * | 2017-12-28 | 2023-08-25 | 扬州华鼎电器有限公司 | Photovoltaic power generation elastic control device and control method thereof |
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