CN206962745U - A kind of resisting potential induced degradation system for photovoltaic plant - Google Patents
A kind of resisting potential induced degradation system for photovoltaic plant Download PDFInfo
- Publication number
- CN206962745U CN206962745U CN201720910971.9U CN201720910971U CN206962745U CN 206962745 U CN206962745 U CN 206962745U CN 201720910971 U CN201720910971 U CN 201720910971U CN 206962745 U CN206962745 U CN 206962745U
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- photovoltaic
- power conversion
- output
- signal
- induced degradation
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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
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Abstract
It the utility model is related to the technical field of solar energy photovoltaic system, disclose a kind of resisting potential induced degradation system for photovoltaic plant, including controller, logic control element, the power conversion unit being connected with the controller, the logic control element is also connected with gps clock unit, and the logic control element is used to transmit repair signal to controller according to the output voltage of the photovoltaic array and the clock signal of gps clock unit；The power conversion unit receives the control signal of controller, for being adjustable DC voltage by convert alternating current, and applies it between the output both positive and negative polarity of multiple photovoltaic arrays and the earth；The gps clock unit is used to provide clock signal.The utility model only can provide the voltage needed for repairing with a power-supply device for all photovoltaic arrays, and the working time of photovoltaic array is made a decision using logic control element and gps clock unit, improves system reliability.
Description
Technical field
It the utility model is related to the technical field of solar energy photovoltaic system, and in particular to a kind of anti-electricity for photovoltaic plant
Gesture induced attenuation system.
Background technology
Photovoltaic module potential induction attenuation PID is a kind of common schema of crystalline silicon component decay failure, and the phenomenon is general
After betiding system installation 2-5, component power is greatly reduced after decay, and open-circuit voltage reduces, and fill factor, curve factor substantially reduces,
So as to which component generating efficiency significantly reduces, built photovoltaic power station power generation amount is had a strong impact on.
Turn into group string after photovoltaic module series connection, photovoltaic power station group string is numerous, is formed after multiple groups of connection in series-parallel independent
Photovoltaic array, and generated electricity by way of merging two or more grid systems using a group string inverter, needed using numerous independent reparations electricity when repairing now
Source and control module, add system complexity.
Utility model content
The utility model provides a kind of resisting potential induced degradation system for photovoltaic plant, solves existing repair and fills
Putting needs to use numerous independent reparation power supplys and control module, the problems such as system complexity increase.
The utility model can be achieved through the following technical solutions：
A kind of resisting potential induced degradation system for photovoltaic plant, including controller, are patrolled with what the controller was connected
Control unit, power conversion unit are collected, the logic control element is also connected with gps clock unit, the logic control element
Repair signal is transmitted to controller for the clock signal of the output voltage according to photovoltaic array and gps clock unit；The work(
Rate converter unit receives the control signal of controller, for being adjustable DC voltage by convert alternating current, and applies it to
Between the output both positive and negative polarity and the earth of multiple photovoltaic arrays；The gps clock unit is used to provide clock signal.
Further, the repair signal is arranged to use the clock signal of the gps clock unit as night hours, and institute
The output voltage for stating photovoltaic array is less than the superposed signal of threshold values.
Further, it is provided with connecting valve between the output both positive and negative polarity of the photovoltaic array, and the photovoltaic array
Output both positive and negative polarity is connected respectively to one end of the power conversion unit, and the other end of the power conversion unit is connected to greatly
Ground.
Further, the multiple switch one on the terminal plate of extension is passed through between the output both positive and negative polarity of multiple photovoltaic arrays
One is correspondingly attached, and is connected to a power conversion unit or multiple power conversion units by the terminal plate of the extension
One power-supply device of connection.
Further, the connecting valve uses relay or electronic switch.
The utility model is beneficial to be had technical effect that：
Using the technical solution of the utility model, when being repaired to photovoltaic array, using connecting valve by each photovoltaic
After the output both positive and negative polarity short circuit of array, then at it apply voltage between the earth, only can all photovoltaics with a power-supply device
Array provides the voltage needed for repairing, and the working time of photovoltaic array is done using logic control element and gps clock unit and sentenced
It is disconnected, to ensure that system of the present utility model carries out repair at night, and it is in holding state daytime, improve system can
By property.
Brief description of the drawings
Connection diagrams of the Fig. 1 between the utility model and photovoltaic array；
Fig. 2 is that circuit of the present utility model connects block diagram.
Embodiment
Below in conjunction with the accompanying drawings and embodiment, specific embodiment of the present utility model is described in detail.
Existing photovoltaic plant includes multiple photovoltaic modulies, is grouped string after multiple photovoltaic module series connection, multiple groups of strings are simultaneously
Independent photovoltaic array is formed after connection, is generated electricity by way of merging two or more grid systems using a group string inverter, and potential induction attenuation PID is crystalline silicon component
A kind of common schema of decay failure, night by applying DC voltage relative to the earth to a group string both positive and negative polarity, can repair group
Part is decayed, and avoids it from decaying again.
As illustrated in fig. 1 and 2, the utility model provides a kind of resisting potential induced degradation system for photovoltaic plant, bag
Include controller, logic control element, the power conversion unit being connected with controller, the logic control element also with gps clock list
Member is connected, and repair signal is transmitted to controller for the clock signal of the output voltage according to photovoltaic array and gps clock unit；
The power conversion unit receives the control signal of controller, for being adjustable DC voltage by convert alternating current, and is applied
It is added between the output both positive and negative polarity of multiple photovoltaic arrays and the earth；The gps clock unit is used to provide clock signal.
The repair signal is arranged to use the clock signal of gps clock unit as night hours, and the output of photovoltaic array
Voltage is less than the superposed signal of threshold values.
Connecting valve, and the output both positive and negative polarity difference of photovoltaic array are provided between the output both positive and negative polarity of the photovoltaic array
One end of the power conversion unit is connected to, the other end of power conversion unit is connected to the earth.
Can also be a pair by multiple switch 1 on the terminal plate of extension between the output both positive and negative polarity of multiple photovoltaic arrays
It should be attached, and a power conversion unit is connected to by the terminal plate of the extension or multiple power conversion units connect
One power-supply device.
When carrying out repair, first, by the output both positive and negative polarity of each photovoltaic array by the terminal plate of extension
Multiple switch correspond and be attached, the connecting valve can use relay, manual disconnecting link and electronic switch etc., logical
The terminal plate for crossing the extension is connected to a power conversion unit or a power-supply device of multiple power conversion units connection, this
Sample, the convenient DC voltage provided with a power conversion unit are repaired to multiple photovoltaic arrays simultaneously.Secondly, logic control
Unit processed is compared by detecting the output voltage of each photovoltaic array with threshold values, in conjunction with gps clock unit provide when
Clock signal further verifies the working time of the photovoltaic array, and then determines that the photovoltaic array is operated in daytime or night, with
Guarantee system just carries out repair in the case that photovoltaic array does not generate electricity at night, and is in holding state daytime, improves
System reliability.
, will be each using connecting valve when being repaired to multiple photovoltaic arrays using the technical solution of the utility model
After the output both positive and negative polarity short circuit of photovoltaic array, then at it apply voltage between the earth, only can all photovoltaics with a power supply
Array provides the voltage needed for repairing, and the working time of photovoltaic array is done using logic control element and gps clock unit and sentenced
It is disconnected, to ensure that system of the present utility model carries out repair at night, and it is in holding state daytime, it is reliable improves system
Property.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and on the premise of without departing substantially from principle of the present utility model and essence, these embodiments can be done
Go out various changes or modifications, therefore, the scope of protection of the utility model is defined by the appended claims.
Claims (5)
- A kind of 1. resisting potential induced degradation system for photovoltaic plant, it is characterised in that：Including controller, with the controller Connected logic control element, power conversion unit, the logic control element are also connected with gps clock unit, the logic Control unit is used for according to the output voltage of photovoltaic array and the clock signal transmission repair signal of gps clock unit to control Device；The power conversion unit receives the control signal of controller, for being adjustable DC voltage by convert alternating current, and will It is applied between the output both positive and negative polarity of multiple photovoltaic arrays and the earth；The gps clock unit is used to provide clock signal.
- 2. the resisting potential induced degradation system according to claim 1 for photovoltaic plant, it is characterised in that：The reparation Signal is arranged to use the clock signal of the gps clock unit as night hours, and the output voltage of the photovoltaic array is low In the superposed signal of threshold values.
- 3. the resisting potential induced degradation system according to claim 1 for photovoltaic plant, it is characterised in that：The photovoltaic Be provided with connecting valve between the output both positive and negative polarity of array, and the output both positive and negative polarity of the photovoltaic array be connected respectively to it is described One end of power conversion unit, the other end of the power conversion unit are connected to the earth.
- 4. the resisting potential induced degradation system according to claim 3 for photovoltaic plant, it is characterised in that：It is multiple described Corresponded and be attached by the multiple switch on the terminal plate of extension between the output both positive and negative polarity of photovoltaic array, and pass through institute The terminal plate for stating extension is connected to a power conversion unit or a power-supply device of multiple power conversion units connection.
- 5. the resisting potential induced degradation system according to claim 3 for photovoltaic plant, it is characterised in that：The connection Switch uses relay or electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720910971.9U CN206962745U (en) | 2017-07-26 | 2017-07-26 | A kind of resisting potential induced degradation system for photovoltaic plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720910971.9U CN206962745U (en) | 2017-07-26 | 2017-07-26 | A kind of resisting potential induced degradation system for photovoltaic plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962745U true CN206962745U (en) | 2018-02-02 |
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ID=61380771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720910971.9U Expired - Fee Related CN206962745U (en) | 2017-07-26 | 2017-07-26 | A kind of resisting potential induced degradation system for photovoltaic plant |
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| Country | Link |
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| CN (1) | CN206962745U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460097A (en) * | 2019-08-21 | 2019-11-15 | 上海质卫环保科技有限公司 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
| CN110535176A (en) * | 2019-08-21 | 2019-12-03 | 上海质卫环保科技有限公司 | A kind of inverter having multichannel MPPT unit and its application |
| CN113345980A (en) * | 2021-05-28 | 2021-09-03 | 普洛德(上海)智能科技有限公司 | Photovoltaic cell panel restorer |
-
2017
- 2017-07-26 CN CN201720910971.9U patent/CN206962745U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460097A (en) * | 2019-08-21 | 2019-11-15 | 上海质卫环保科技有限公司 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
| CN110535176A (en) * | 2019-08-21 | 2019-12-03 | 上海质卫环保科技有限公司 | A kind of inverter having multichannel MPPT unit and its application |
| CN113345980A (en) * | 2021-05-28 | 2021-09-03 | 普洛德(上海)智能科技有限公司 | Photovoltaic cell panel restorer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 Termination date: 20190726 |