CN106505611A - A kind of back-emf induced attenuation control device - Google Patents
A kind of back-emf induced attenuation control device Download PDFInfo
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- CN106505611A CN106505611A CN201610921632.0A CN201610921632A CN106505611A CN 106505611 A CN106505611 A CN 106505611A CN 201610921632 A CN201610921632 A CN 201610921632A CN 106505611 A CN106505611 A CN 106505611A
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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The present invention discloses a kind of back-emf induced attenuation control device, including being grounded control system；The negative pole or positive pole of photovoltaic battery panel is by the ground connection control system ground connection；The ground connection control system includes gate-controlled switch device, current sensing means and controller；The negative pole or positive pole of one end connection photovoltaic battery panel of the gate-controlled switch device, the other end are connected with one end of current sensing means, and the other end ground connection of current sensing means, the controller are connected with gate-controlled switch device, current sensing means, inverter.Photovoltaic battery panel negative pole or the grounded control system of positive pole are grounded by the present invention; and gate-controlled switch device, current sensing means and controller have redundancy; no matter whether grid-connected inverters run; when ground connection control system works, photovoltaic battery panel remains design voltage to the earth; the potential induction attenuation effect of cell panel can effectively be suppressed, acted on leakage current abnormal protection.
Description
Technical field
A kind of the present invention relates to potential induction attenuation control technology field, more particularly to back-emf induced attenuation control dress
Put.
Background technology
Potential induction attenuation (Potential Induced Degradation, PID) refers to that high pressure is applied to battery over the ground
The phenomenon for reducing its performance on plate.The high pressure can be alternatively negative pressure, component for malleation according to different cell panel characteristics
Can decline and show as open-circuit voltage (Voc) declines, fill factor, curve factor (FF) declines etc., the phenomenon can be extensive under backward voltage effect
Multiple.At present, in order to suppress the potential induction attenuation PID effect of cell panel, conventional method is as follows：First, pass through lifting electrical network midpoint
Voltage (or virtual mid-point voltage), after grid-connected inverters, the voltage by the negative pole of photovoltaic battery panel over the ground is lifted to 0V indirectly
More than (ground potential)；But this mode needs the DC bus-bar voltage for knowing all inverters, implements complex；
2nd, by bias supply lifting cell panel negative pole voltage-to-ground, more than 0V is lifted to, this mode can not be in inverter simultaneously
Work during net, and night bias supply is worked always, consumed energy, reduce the service life of bias supply.
Content of the invention
It is an object of the invention to by a kind of back-emf induced attenuation control device, solving background section above
The problem that mentions.
It is that the present invention is employed the following technical solutions up to this purpose：
A kind of back-emf induced attenuation control device, it include being grounded control system；The negative pole or positive pole of photovoltaic battery panel
By the ground connection control system ground connection；The ground connection control system includes gate-controlled switch device, current sensing means and control
Device；The negative pole or positive pole of one end connection photovoltaic battery panel of the gate-controlled switch device, the other end and the one of current sensing means
End connection, the other end ground connection of current sensing means, the controller and gate-controlled switch device, current sensing means, inverter
Connection.
Especially, the ground connection control system also includes fuse, and the gate-controlled switch device connects light by fuse
The negative pole or positive pole of volt cell panel.
Especially, any one of relay, contactor, switching tube selected by the gate-controlled switch device.
Especially, the ground connection control system includes the first gate-controlled switch device, the first current sensing means, the first control
Device and the second gate-controlled switch device, the second current sensing means, second controller；The first gate-controlled switch device, second
Gate-controlled switch device, the first current sensing means, the second current sensing means are connected in series successively, the first gate-controlled switch device
Part is connected with the negative pole or positive pole of photovoltaic battery panel, the second current sensing means ground connection, first controller and first
Gate-controlled switch device, the first current sensing means, inverter connection, the second controller and the second gate-controlled switch device, the
Two current sensing means, inverter connection.
Back-emf induced attenuation control device proposed by the present invention controls system by grounded to photovoltaic battery panel negative pole or positive pole
System ground connection, and gate-controlled switch device, current sensing means and controller have redundancy, it can be ensured that ground connection control system goes out incumbent
In time photovoltaic battery panel is disconnected with the earth during what Single Point of Faliure, no matter grid-connected inverters whether runs, ground connection control be
During system work, photovoltaic battery panel remains design voltage to the earth, can effectively suppress the potential induction attenuation of cell panel to imitate
Should, act on leakage current abnormal protection.
Description of the drawings
Fig. 1 is back-emf induced attenuation control device structure chart provided in an embodiment of the present invention；
Fig. 2 is the photovoltaic battery panel minus earth schematic diagram of redundancy protecting provided in an embodiment of the present invention；
Fig. 3 is the photovoltaic battery panel plus earth schematic diagram of redundancy protecting provided in an embodiment of the present invention；
Fig. 4 is the photovoltaic battery panel minus earth schematic diagram without fuse provided in an embodiment of the present invention；
Fig. 5 is the photovoltaic battery panel plus earth schematic diagram without fuse provided in an embodiment of the present invention.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the more thorough of the disclosure understanding
Comprehensively.It should be noted that when an element is considered as " connection " another element, it can be directly to another
Element may be simultaneously present centering elements.Unless otherwise defined, all of technology used herein and scientific terminology with
The implication that the those skilled in the art for belonging to of the invention are generally understood that is identical.Made in the description of the invention herein
Term is intended merely to the purpose for describing specific embodiment, it is not intended that of the invention in limiting.Term as used herein
" and/or " include the arbitrary and all of combination of one or more related Listed Items.
In the present embodiment, back-emf induced attenuation control device specifically includes ground connection control system；The negative pole of photovoltaic battery panel
Or positive pole is by the ground connection control system ground connection；The ground connection control system includes gate-controlled switch device, current sensing means
And controller；The negative pole or positive pole of one end connection photovoltaic battery panel of the gate-controlled switch device, the other end are filled with current detecting
One end connection that puts, the other end ground connection of current sensing means, the controller and gate-controlled switch device, current sensing means,
Inverter connects.The ground connection control system can also arrange a fuse in the present embodiment, and the gate-controlled switch device leads to
The negative pole or positive pole of overcurrent fuse connection photovoltaic battery panel.The gate-controlled switch device can select relay, contactor, switching tube
Deng gate-controlled switch device any one.As shown in figure 1, the negative pole of photovoltaic battery panel is big by being grounded control system connection in Fig. 1
Ground, PV+, PV- refer to the negative pole of photovoltaic battery panel, positive pole respectively, and F1 is fuse, and RLY1 is gate-controlled switch device, and I1 is electric current
Detection means, PGND refer to big ground terminal.
In time photovoltaic battery panel is disconnected with the earth in order to ensure being grounded when any Single Point of Faliure occurs in control system,
Gate-controlled switch device, current sensing means and controller have redundancy.
In the present embodiment the ground connection control system include the first gate-controlled switch device, the first current sensing means, the
One controller and the second gate-controlled switch device, the second current sensing means, second controller；The first gate-controlled switch device
Part, the second gate-controlled switch device, the first current sensing means, the second current sensing means are connected in series successively, and described first can
Control switching device is connected with the negative pole or positive pole of photovoltaic battery panel, the second current sensing means ground connection, first control
Device is connected with the first gate-controlled switch device, the first current sensing means, inverter, the second controller and the second gate-controlled switch
Device, the second current sensing means, inverter connection.As shown in Figures 2 to 5, in figure, PV+, PV- refer to photovoltaic battery panel respectively
Negative pole, positive pole, F1 is fuse, and RLY1, RLY2 are respectively the first gate-controlled switch device, the second gate-controlled switch device, I1, I2 point
Not Wei the first current sensing means, the second current sensing means, controller 1, controller 2 refer to respectively the first controller, second control
Device processed, PGND refer to big ground terminal.
Back-emf induced attenuation control device proposed by the present invention by being grounded control system by photovoltaic battery panel positive pole or
Person's minus earth, the ground connection control system include fuse, gate-controlled switch device, current sensing means and controller, and can
Control switching device, current sensing means and controller are designed with redundancy.As shown in Fig. 2 no matter whether grid-connected inverters run,
The ground connection control system can cause battery panel components to remain positive voltage over the ground when working, so as to suppress p-type photovoltaic electric
Potential induction attenuation (PID) effect of pond plate；N-type photovoltaic battery panel is directed to likewise, as shown in figure 3, pass through photovoltaic battery panel
It is negative pressure over the ground that the method for plus earth can keep battery panel components, declines so as to suppress the potential of N-type photovoltaic battery panel to induce
Subtract (PID) effect.The ground connection control system does not affect the insulation impedance detection function of inverter, the photovoltaic when switching device disconnects
Cell panel is completely isolated with the earth, does not change the insulation impedance detection scheme of inverter.
The ground connection control system is also acted on reliable residual current protection, when grid-connected inverting system occurs leak current fault
When, controller can disengage earthed system in time.It is illustrated below：When impedance bond photovoltaic battery panel positive pole, photovoltaic electric
Pond plate positive pole, current path between negative pole, the earth and earth element, is just formed, form leakage current, when current sensing means is detected
When being more than default threshold value to leakage current, controller provides gate-controlled switch device open command, earth element is disconnected, is reached
Earth leakage protective technique effect.More importantly, the ground connection control system solves the problems, such as Single Point of Faliure, when earth element occurs list
During point failure, can be with when such as the short circuit of gate-controlled switch device R LY1, current sensing means I 1 or controller 1 occur electric leakage throat floater
Defencive function is completed by current sensing means I2, gate-controlled switch device R LY2 and controller 2.
The invention has the characteristics that：First, gate-controlled switch device, current sensing means and controller are designed with redundancy,
In time photovoltaic battery panel is disconnected with the earth when being able to ensure that any Single Point of Faliure occurs in earthed system；2nd, the ground connection control
System processed can effectively suppress cell panel PID effects；3rd, controller can be inverter internal controller can also be outside solely
Vertical controller；4th, controller 1, controller 2 are not limited to herein with gate-controlled switch device, the connection of current sensing means
The mode, the mutation of all connected modes are will not enumerate in this patent protection domain；5th, gate-controlled switch device
It is not limited to the gate-controlled switch device such as relay, or contactor, switching tube；6th, ground connection control system can not be wrapped
Contain fuse.
Technical scheme is by photovoltaic battery panel negative pole or the grounded control system ground connection of positive pole, and gate-controlled switch device
Part, current sensing means and controller have redundancy, it can be ensured that in time during any Single Point of Faliure occurs in ground connection control system
Photovoltaic battery panel is disconnected with the earth, no matter whether grid-connected inverters run, photovoltaic battery panel when ground connection control system works
Design voltage is remained to the earth, can effectively suppress the potential induction attenuation effect of cell panel, protected with electric leakage throat floater
Shield is acted on.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for those skilled in the art
For, the present invention can have various changes and change.All any modifications that is made within spirit and principles of the present invention, equivalent
Replace, improve etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of back-emf induced attenuation control device, it is characterised in that including being grounded control system；The negative pole of photovoltaic battery panel
Or positive pole is by the ground connection control system ground connection；The ground connection control system includes gate-controlled switch device, current sensing means
And controller；The negative pole or positive pole of one end connection photovoltaic battery panel of the gate-controlled switch device, the other end are filled with current detecting
One end connection that puts, the other end ground connection of current sensing means, the controller and gate-controlled switch device, current sensing means,
Inverter connects.
2. back-emf induced attenuation control device according to claim 1, it is characterised in that the ground connection control system is also
Including fuse, the gate-controlled switch device connects the negative pole or positive pole of photovoltaic battery panel by fuse.
3. the back-emf induced attenuation control device according to claim 1 or 2 any one, it is characterised in that described controllable
Switching device selects any one of relay, contactor, switching tube.
4. back-emf induced attenuation control device according to claim 3, it is characterised in that the ground connection control system bag
Include the first gate-controlled switch device, the first current sensing means, the first controller and the second gate-controlled switch device, the inspection of the second electric current
Survey device, second controller；The first gate-controlled switch device, the second gate-controlled switch device, the first current sensing means, second
Current sensing means is connected in series successively, and the first gate-controlled switch device is connected with the negative pole or positive pole of photovoltaic battery panel, institute
State the second current sensing means ground connection, first controller and the first gate-controlled switch device, the first current sensing means, inversion
Device connects, and the second controller is connected with the second gate-controlled switch device, the second current sensing means, inverter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610921632.0A CN106505611A (en) | 2016-10-21 | 2016-10-21 | A kind of back-emf induced attenuation control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610921632.0A CN106505611A (en) | 2016-10-21 | 2016-10-21 | A kind of back-emf induced attenuation control device |
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| CN106505611A true CN106505611A (en) | 2017-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107765094A (en) * | 2017-10-13 | 2018-03-06 | 阳光电源股份有限公司 | A kind of photovoltaic battery panel PID prosthetic devices |
| CN110635767A (en) * | 2019-09-25 | 2019-12-31 | 沈阳新智恒新能源科技有限公司 | Photovoltaic system and method for inhibiting potential attenuation and monitoring insulation |
| CN110867900A (en) * | 2019-12-11 | 2020-03-06 | 阳光电源股份有限公司 | Wind-solar hybrid power generation system |
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| CN103607172A (en) * | 2013-12-05 | 2014-02-26 | 无锡上能新能源有限公司 | Device for simultaneously realizing negative grounding and ground insulation resistance detection in photovoltaic power station |
| US20140285133A1 (en) * | 2010-12-21 | 2014-09-25 | AltEn, LLC | Power Metering And Control System Adaptable To Multi-Standard Device |
| CN105637758A (en) * | 2013-08-21 | 2016-06-01 | 腾克太阳能公司 | Fully redundant photovoltaic array |
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2016
- 2016-10-21 CN CN201610921632.0A patent/CN106505611A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140285133A1 (en) * | 2010-12-21 | 2014-09-25 | AltEn, LLC | Power Metering And Control System Adaptable To Multi-Standard Device |
| CN105637758A (en) * | 2013-08-21 | 2016-06-01 | 腾克太阳能公司 | Fully redundant photovoltaic array |
| CN103607172A (en) * | 2013-12-05 | 2014-02-26 | 无锡上能新能源有限公司 | Device for simultaneously realizing negative grounding and ground insulation resistance detection in photovoltaic power station |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107765094A (en) * | 2017-10-13 | 2018-03-06 | 阳光电源股份有限公司 | A kind of photovoltaic battery panel PID prosthetic devices |
| CN110635767A (en) * | 2019-09-25 | 2019-12-31 | 沈阳新智恒新能源科技有限公司 | Photovoltaic system and method for inhibiting potential attenuation and monitoring insulation |
| CN110867900A (en) * | 2019-12-11 | 2020-03-06 | 阳光电源股份有限公司 | Wind-solar hybrid power generation system |
| CN110867900B (en) * | 2019-12-11 | 2021-11-02 | 阳光电源股份有限公司 | Wind-solar hybrid power generation system |
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Application publication date: 20170315 |