CN110460097A - A kind of pressurizing device applied to multichannel MPPT unit structure inverter - Google Patents
A kind of pressurizing device applied to multichannel MPPT unit structure inverter Download PDFInfo
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- CN110460097A CN110460097A CN201910773984.XA CN201910773984A CN110460097A CN 110460097 A CN110460097 A CN 110460097A CN 201910773984 A CN201910773984 A CN 201910773984A CN 110460097 A CN110460097 A CN 110460097A
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Abstract
The invention discloses a kind of pressurizing devices applied to multichannel MPPT unit structure inverter, which is characterized in that including at least one MPPT unit, pressure-applying unit, pressure-applying unit includes voltage detection module, control module, compression module, first diode；The first electrode of each MPPT unit is conductively connected respectively, and the second electrode of each MPPT unit is connected from the positive conductive of different first diodes respectively, is conductively connected after the cathode of each first diode is in parallel with the second electrode incoming end of voltage detection module；Then the pressurization output end of the first electrode incoming end of the first electrode of any MPPT unit and voltage detection module, compression module is conductively connected；The first electrode, second electrode be respectively anode, cathode one of them.The cost of the configuration of the present invention is simple, its cost and only one current MPPT unit is not much different and well below the cost that multiple MPPT units are used with test device one by one, and it is constant while simplifying structure, reducing cost to go back assurance function.
Description
Technical field
The present invention relates to field of photovoltaic power generation, more particularly to a kind of adding applied to multichannel MPPT unit structure inverter
Pressure device.
Background technique
The PID(potential energy induced attenuation of solar power station) phenomenon is solar pond component outdoors in application process, due to
Solar battery has certain potential over the ground, extraneous cation or anion occurs and is adsorbed onto cell piece surface, influences electricity
The phenomenon that p/n on pond piece surface ties distribution, causes power attenuation.The PID phenomenon of solar battery can be by component and the earth
Between apply forward voltage or negative voltage (below by taking forward voltage as an example) and prevented and restored.
In the case of daytime, solar array voltage is relatively high, and under nighttime conditions, the voltage of solar battery is relatively low.For
So that pressurized equipment is judged night or daytime, the anode (PV+) and cathode (PV-) of solar battery need to be connected, pass through electricity
Pressure detection module obtains the information of solar array voltage, controls the opening and closing of pressurized equipment.
When inverter internal is single MPPT unit structure, the voltage for testing MPPT unit all the way can judge to be at night
Between or daytime.
When inverter content includes multiple MPPT unit structures, one of pole (positive or negative pole) of MPPT unit is
It connects together, another pole is disconnected by diode.There is technology only to test a MPPT unit voltage, as ginseng
It examines, judges night or daytime.It is night or daytime that this scheme, which is unable to accurate judgement, when opening pressurized equipment daytime
It waits, fault of converter can be caused.There is the voltage of each MPPT unit of technical testing, with accurate judgement night or daytime.But this
Kind method is at high cost, and a more fault point.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide one kind to be applied to multichannel
The pressurizing device of MPPT unit structure inverter, structure is simple, at low cost and can be quasi- using multiple MPPT
Really judge night or daytime.
To achieve the above object, the present invention provides a kind of pressurization dresses applied to multichannel MPPT unit structure inverter
Set, including at least one MPPT unit, pressure-applying unit, pressure-applying unit include voltage detection module, control module, compression module,
First diode；
Voltage detection module is used to detect the voltage of each MPPT unit, and voltage value is fed back to control module；
Compression module between the cathode and the earth of each MPPT unit for pressurizeing；
The minimum voltage value that control module is used to detect voltage detection module is compared with preset threshold, once voltage is examined
When the maximum voltage value that survey module detects is no more than preset threshold, then compression module operation is controlled with mono- to any MPPT
It pressurizes between the cathode and the earth of member；
The signal end of voltage detection module and the signal end communication connection of control module, the signal end of control module also with compression molding
The control terminal communication connection of block；
The first electrode of each MPPT unit is conductively connected respectively, and the second electrode of each MPPT unit is respectively from different first
The positive conductive of diode connects, and leads after the cathode of each first diode is in parallel with the second electrode incoming end of voltage detection module
Electrical connection；Then the first electrode incoming end conduction of the first electrode of any MPPT unit and voltage detection module is connected
It connects；The first electrode, second electrode be respectively anode, cathode one of them.This design enables voltage detection module to detect
To all MPPT unit voltages maximum value and this technology there is no misjudgment phenomenon, cost is relatively low, and sexual valence is relatively high.
It preferably, further include at least one solar battery, inverter, inverter includes corresponding with solar battery one by one
MPPT unit (MPPT controller), inversion unit, the inversion unit is for DC inverter can be connected to the grid
Alternating current；
Anode, the cathode of solar battery are conductively connected with the positive incoming end of each MPPT unit, cathode incoming end respectively, specifically
It is conductively connected for the anode of solar battery and the positive incoming end of each MPPT unit, the positive incoming end difference of each MPPT unit
It being connect with the positive conductive of each second diode, the second diode is separately mounted in each MPPT unit, and the second diode
The anode of cathode and each MPPT unit picks out end and is conductively connected, the anode of each MPPT unit pick out end it is in parallel after with inversion unit
Electrode input end is conductively connected；Each MPPT unit cathode is connect after picking out end difference parallel connection with the negative conductive of inversion unit；It is inverse
Alternating current output end and the power grid for becoming unit are grid-connected.
Preferably, connect again with the positive conductive of first diode after the second electrode of each MPPT unit is connected with fuse
It connects.When this design with the concatenated first diode of the fuse so that damage, fuse fuses quickly, disconnects MPPT unit, avoids
Inverter breaks down.
Preferably, first electrode is cathode, and second electrode is anode, and the anode of each MPPT unit is individually drawn one and led
After line is connected with fuse, first diode respectively and together, then the positive incoming end conductive connection with voltage detection module；From
The cathode of any MPPT unit draws a line and the cathode incoming end of voltage detection module is conductively connected.
Preferably, first electrode is anode, and second electrode is cathode, draws one respectively from different MPPT unit cathode
It is conductively connected after conducting wire is connected with fuse, first diode respectively and together with the cathode incoming end of voltage detection module；From
The anode of any MPPT unit draws a conducting wire and the positive incoming end of voltage detection module is conductively connected.By this
Structure can detecte the maximum voltage of all MPPT units.
The beneficial effects of the present invention are: the cost of the configuration of the present invention is simple, its cost and only one current MPPT unit
It is not much different and well below the cost that multiple MPPT units are used with test device one by one.And accuracy at present it is multiple
MPPT unit is identical by the way of test device one by one, therefore goes back assurance function not while simplifying structure, reducing cost
Become, technological innovation is larger, is suitble to large-scale popularization, economic value with higher.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
Referring to Fig. 1, a kind of pressurizing device applied to multichannel MPPT unit structure inverter, including pressure-applying unit 2, inversion
Device 3, solar battery 1, the pressure-applying unit 2 include:
Voltage detection module 2-3 feeds back to control module 2-4 for detecting the voltage of each MPPT unit, and by voltage value；
Compression module 2-5, for pressurizeing between the cathode and the earth to each MPPT unit 3-1；
Control module 2-4, the minimum voltage value for detecting voltage detection module 2-3 are compared with preset threshold, and one
When the maximum voltage value that denier voltage detection module 2-3 is detected is not more than preset threshold, then compression module 2-5 operation is controlled with right
It pressurizes between the cathode and the earth of any MPPT unit 3-1；
The signal end of voltage detection module 2-3 and the signal end communication connection of control module 2-4, the signal end of control module 2-4
Also with the control terminal communication connection of compression module 2-5；
It further include first diode 2-2 and fuse 2-1, fuse 2-1 is for protecting inverter 3.
The inverter 3, comprising:
MPPT unit 3-1 for the generating voltage of detecting real-time solar panels, and tracks ceiling voltage current value；MPPT unit
The positive incoming end conduction of anode and MPPT unit 3-1 that the second diode 3-2, the second diode 3-2 is equipped in 3-1 connects
It connects, the positive incoming end of MPPT unit 3-1 connect with the positive conductive of solar battery 1, the anode of cathode and MPPT unit 3-1
End is picked out to be conductively connected；
The anode of MPPT unit 3-1 pick out end it is in parallel after be conductively connected with the positive incoming end of inversion unit 3-3；MPPT unit 3-
1 cathode pick out end it is in parallel after be conductively connected with the cathode incoming end of inversion unit 3-3.
Inversion unit 3-3, the direct current for carrying out each MPPT unit 3-1 conveying are converted to the exchange that can be connected to the grid
Electricity.
The anode (positive incoming end or anode pick out end) of each MPPT unit 3-1 respectively with fuse 2-1, first diode 2-
It is in parallel after 2 series connection, then be conductively connected with the positive incoming end of voltage detection module 2-3；The anode of any MPPT unit 3-1
(cathode incoming end or cathode pick out end) and the cathode incoming end of voltage detection module 2-3, the pressurization output end of compression module 2-5
It is conductively connected.
The operational process of the present embodiment is as follows:
After S1, solar battery 1 receive sunlight, PV voltage is increased.At night, in the case where sunlight, PV voltage is reduced
It is 0.The present embodiment sets 0 for the threshold value that control module starts starting compression module.
It include MPPT unit 3-1 inside S2, inverter 3, the cathode of MPPT unit connects together, and anode passes through diode 3-
2 isolation.
After S3, direct current are converted by multiple MPPT unit 3-1, it is connected in parallel, into inversion unit 3-3, is converted to
After alternating current, it is sent into power grid.
S4, multiple MPPT unit 3-1 anode (PV+) draw a line respectively, pass through fuse 2-1, first diode 2-2
Enter the positive incoming end of voltage detection module 2-3 afterwards.
Cathode (PV-) one line of extraction of S5, any MPPT unit 3-1, into the cathode of voltage detection module 2-3
Incoming end.
S5, multiple MPPT unit 3-1 PV+ be isolated by first diode 2-2, be used cooperatively, can be detected with PV-
The ceiling voltage of all MPPT unit 3-1.
If S6, first diode 2-2 are damaged, the PV+ of different MPPT unit 3-1 is caused to connect together, fuse 2-2 can be very
Fast fusing, disconnects all MPPT unit 3-1, inverter 3 is avoided to break down.
S7, voltage detection module 2-3 are connected with control module 2-4, and voltage detection module 2-3 is in real time by the incoming control of voltage value
Molding block 2-4.Control module 2-4 is connected with compression module 2-5, controls the work or stopping of compression module.
S8, the maximum MPPT unit 3-1 voltage tested as voltage detection module 2-3 are lower than certain value (threshold value)
When, control module 2-4 controls compression module 2-5 and applies voltage between the cathode and the earth for the MPPT unit being electrically connected.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (7)
1. a kind of pressurizing device applied to multichannel MPPT unit structure inverter, which is characterized in that including MPPT unit, pressurization
Component, pressure-applying unit include voltage detection module, control module, compression module, first diode；
The first electrode of each MPPT unit is conductively connected respectively, and the second electrode of each MPPT unit is respectively from different first
The positive conductive of diode connects, and leads after the cathode of each first diode is in parallel with the second electrode incoming end of voltage detection module
Electrical connection；Then by the first electrode and the first electrode incoming end of voltage detection module, compression molding of any MPPT unit
The pressurization output end of block is conductively connected；The first electrode, second electrode be respectively anode, cathode one of them.
2. pressurizing device as described in claim 1, which is characterized in that voltage detection module is used to detect the electricity of each MPPT unit
Pressure, and voltage value is fed back into control module；
Compression module between the cathode and the earth of each MPPT unit for pressurizeing；
The minimum voltage value that control module is used to detect voltage detection module is compared with preset threshold, once voltage is examined
When the maximum voltage value that survey module detects is no more than preset threshold, then compression module operation is controlled with mono- to any MPPT
It pressurizes between the cathode and the earth of member；
The signal end of voltage detection module and the signal end communication connection of control module, the signal end of control module also with compression molding
The control terminal communication connection of block.
3. pressurizing device as claimed in claim 1 or 2, which is characterized in that the second electrode and fuse string of each MPPT unit
Positive conductive after connection again with first diode is connect.
4. pressurizing device as claimed in claim 3, which is characterized in that first electrode is cathode, and second electrode is anode, each
MPPT unit anode individually draw a conducting wire connect respectively with fuse, first diode after and together, then with voltage inspection
The positive incoming end for surveying module is conductively connected；A line and voltage detection module are drawn from the cathode of any MPPT unit
Cathode incoming end is conductively connected.
5. pressurizing device as claimed in claim 3, which is characterized in that first electrode is anode, and second electrode is cathode, never
With MPPT unit cathode draw after a conducting wire is connected with fuse, first diode respectively respectively and together with voltage detecting
The cathode incoming end of module is conductively connected；A conducting wire and voltage detection module are drawn from the anode of any MPPT unit
Positive incoming end is conductively connected.
6. pressurizing device as claimed in claim 1 or 2, which is characterized in that further include at least one solar battery, inversion
Device, inverter include that MPPT unit corresponding with solar battery, inversion unit, the inversion unit are used for direct current one by one
Inversion is the alternating current that can be connected to the grid；
Anode, the cathode of solar battery are conductively connected with the positive incoming end of each MPPT unit, cathode incoming end respectively, respectively
The positive incoming end of MPPT unit is connect with the positive conductive of each second diode respectively, and the second diode is separately mounted to respectively
In MPPT unit, and the anode of the cathode of the second diode and each MPPT unit picks out end and is conductively connected, and each MPPT unit is just
Pole pick out end it is in parallel after be conductively connected with the electrode input end of inversion unit；Each MPPT unit cathode pick out end it is in parallel respectively after with
The negative conductive of inversion unit connects；The cathode of each MPPT unit pick out end it is in parallel after it is conductive with the cathode incoming end of inversion unit
Connection.
7. pressurizing device as claimed in claim 6, which is characterized in that the alternating current output end and power grid of inversion unit are grid-connected.
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| CN201910773984.XA CN110460097A (en) | 2019-08-21 | 2019-08-21 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
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| CN201910773984.XA CN110460097A (en) | 2019-08-21 | 2019-08-21 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888052A (en) * | 2014-04-09 | 2014-06-25 | 上海正泰电源系统有限公司 | Achieving method for preventing photovoltaic cell panel PID effect |
| CN104201983A (en) * | 2014-09-23 | 2014-12-10 | 阳光电源股份有限公司 | Device for lowering potential induction decay |
| CN104377732A (en) * | 2014-11-21 | 2015-02-25 | 南车株洲电力机车研究所有限公司 | DC bus distributed MPPT photovoltaic power generation system |
| CN107453703A (en) * | 2017-08-16 | 2017-12-08 | 上海质卫环保科技有限公司 | A kind of solar cell PID recovers and prevention component |
| CN206962745U (en) * | 2017-07-26 | 2018-02-02 | 上海伏光太阳能科技有限公司 | A kind of resisting potential induced degradation system for photovoltaic plant |
-
2019
- 2019-08-21 CN CN201910773984.XA patent/CN110460097A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888052A (en) * | 2014-04-09 | 2014-06-25 | 上海正泰电源系统有限公司 | Achieving method for preventing photovoltaic cell panel PID effect |
| CN104201983A (en) * | 2014-09-23 | 2014-12-10 | 阳光电源股份有限公司 | Device for lowering potential induction decay |
| CN104377732A (en) * | 2014-11-21 | 2015-02-25 | 南车株洲电力机车研究所有限公司 | DC bus distributed MPPT photovoltaic power generation system |
| CN206962745U (en) * | 2017-07-26 | 2018-02-02 | 上海伏光太阳能科技有限公司 | A kind of resisting potential induced degradation system for photovoltaic plant |
| CN107453703A (en) * | 2017-08-16 | 2017-12-08 | 上海质卫环保科技有限公司 | A kind of solar cell PID recovers and prevention component |
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Application publication date: 20191115 |