CN108011583A - A kind of device of suppression PID effects - Google Patents
A kind of device of suppression PID effects Download PDFInfo
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- CN108011583A CN108011583A CN201711444650.5A CN201711444650A CN108011583A CN 108011583 A CN108011583 A CN 108011583A CN 201711444650 A CN201711444650 A CN 201711444650A CN 108011583 A CN108011583 A CN 108011583A
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- 230000000694 effects Effects 0.000 title claims abstract description 36
- 230000001629 suppression Effects 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 9
- 230000008439 repair process Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012636 effector Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- 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
The present invention provides a kind of device of suppression PID effects, it is controlled by it collection value of the anode to big ground voltage that unit obtains photovoltaic array in photovoltaic generating system, and pass through the output voltage of closed loop adjustment control Switching Power Supply, the anode of photovoltaic array is adjusted to preset value to big ground voltage, so that photovoltaic array is compensated big ground voltage；According to the difference of preset value, the PID preventions for photovoltaic battery panel can be realized respectively and repair two kinds of functions.
Description
Technical field
The present invention relates to power electronics field, more particularly to a kind of device of suppression PID effects.
Background technology
PID (Potential Induced Degradation) effect is also known as potential induction attenuation, is some type photovoltaics
The phenomenon for the output characteristics decay that solar panel is shown due to potential induction, can cause the output power of photovoltaic system to decline；
Therefore need to carry out PID preventions or reparation to it by anti-PID technologies.
The scheme of PID preventions is realized in the prior art, mainly when inverter works, passes through lifting exchange side neutral point
Potential to ground, come indirect lifting solar panel anode potential to ground to just.And realize PID repair scheme, typically use from
The anti-PID technologies of line, its PID prosthetic device are generally mounted to the cathode (or anode) of photovoltaic battery panel, by being utilized just at night
Photovoltaic battery panel is lifted to the potential of the earth just (or negative) by bias supply (or negative bias power supply).
Therefore, relevant apparatus of the prior art, function is single, can only realize that PID preventions on daytime and night PID repair it
In a function, can not have concurrently for photovoltaic battery panel PID prevention and repair two kinds of functions.
The content of the invention
The present invention provides a kind of device of suppression PID effects, has two kinds of PID preventions and reparation for photovoltaic battery panel concurrently
Function.
To achieve the above object, the technical solution that the application provides is as follows：
A kind of device of suppression PID effects, applied to photovoltaic generating system, the device of the suppression PID effects includes：Control
Unit, Switching Power Supply, current limiting unit and power clamp unit processed；Wherein：
The input terminal of described control unit is connected with the communication terminal of inverter in the photovoltaic generating system；
The output terminal of described control unit is connected with the control terminal of the Switching Power Supply；
The input terminal phase that the output head anode of the Switching Power Supply passes through the current limiting unit and the power clamp unit
Even；The negative pole of output end of the Switching Power Supply connects the earth；
The output terminal of the power clamp unit is connected with the DC side of the inverter；
The anode that described control unit is used to gather photovoltaic array in the photovoltaic generating system passes through big ground voltage
The output voltage of Switching Power Supply described in closed loop adjustment control, preset value is adjusted to by the anode of photovoltaic array to big ground voltage；
The power clamp unit is used for when the inverter is in off-mode, controls the capacitance in the inverter
Bear positive pressure.
Preferably, the high-potential output end of the power clamp unit is connected with photovoltaic array cathode；
The low potential output terminal of the power clamp unit is connected with photovoltaic array anode or midpoint.
Preferably, when the photovoltaic generating system includes the DC/DC that is arranged between photovoltaic array and the inverter
During converter, the high-potential output end of the power clamp unit is connected with the high-potential output end of the DC/DC converters；Institute
The low potential output terminal for stating power clamp unit is connected with the low potential output terminal of the DC/DC converters.
Preferably, the power clamp unit includes：First series arm and the second series arm；Wherein：
First series arm includes the diode of M series connection, and the cathode of first series arm is the power supply
The high-potential output end of clamping unit；
Second series arm includes the diode of N number of series connection, and the cathode of second series arm is the power supply
The low potential output terminal of clamping unit；
The anode of first series arm is connected with the anode of second series arm, and tie point clamps for the power supply
The input terminal of bit location；
M and N is positive integer, and M is less than N.
Preferably, the current limiting unit includes：The current-limiting resistance and fuse being connected in series.
Preferably, the power clamp unit includes：The auxiliary DC power supply and first switch being connected in series；
The cathode of the auxiliary DC power supply is connected with the DC side cathode of the inverter, the auxiliary DC power supply
Anode is connected by the first switch with the DC side anode of the inverter；Alternatively, the cathode of the auxiliary DC power supply
It is connected by the first switch with the DC side cathode of the inverter, the anode of the auxiliary DC power supply and the inversion
The DC side anode of device is connected；
The control terminal of the first switch is connected with the output terminal of described control unit.
Preferably, the current limiting unit includes：Diode, current-limiting resistance and the fuse being connected in series, the diode
Direction it is identical with the output current direction of the Switching Power Supply.
Preferably, further include：Second switch；The second switch is connected in series in the output head anode of the Switching Power Supply
Between the input terminal of the current limiting unit, the control terminal of the second switch is connected with the output terminal of described control unit.
Preferably, the Switching Power Supply is：BUCK, BOOST, BUCK-BOOST, CUK, normal shock, flyback, half-bridge, full-bridge and
Any one in push-pull type topology.
The device of suppression PID effects provided by the invention, is controlled by it unit and obtains photovoltaic array in photovoltaic generating system
Anode to the collection value of big ground voltage, and by the output voltage of closed loop adjustment control Switching Power Supply, by photovoltaic array
Anode is adjusted to preset value to big ground voltage, so that photovoltaic array is compensated big ground voltage；According to preset value not
Together, the PID preventions for photovoltaic battery panel can be realized respectively and repair two kinds of functions.
Brief description of the drawings
Technical solution in order to illustrate the embodiments of the present invention more clearly or in the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the attached drawing in description is only this below
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of the device of suppression PID effects provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of the device for the suppression PID effects that another embodiment of the present invention provides；
Fig. 3 is the circuit diagram of the device for the suppression PID effects that another embodiment of the present invention provides；
Fig. 4 is the circuit diagram of the device for the suppression PID effects that another embodiment of the present invention provides；
Fig. 5 is the circuit diagram of the device for the suppression PID effects that another embodiment of the present invention provides；
Fig. 6 is the equivalent schematic for the device for suppressing PID effects shown in Fig. 2 that another embodiment of the present invention provides；
Fig. 7 is another equivalent schematic for the device for suppressing PID effects shown in Fig. 2 that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment, shall fall in the protection scope of this application.
The present invention provides a kind of device of suppression PID effects, has two kinds of PID preventions and reparation for photovoltaic battery panel concurrently
Function.
The device of suppression PID effects, applied to photovoltaic generating system, specifically, as shown in Figure 1, suppression PID effects
Device include：Control unit 101, Switching Power Supply 102, current limiting unit 103 and power clamp unit 104；Wherein：
The input terminal of control unit 101 is connected with the communication terminal of inverter in photovoltaic generating system, to be obtained by communicating
The anode of photovoltaic array is to big ground voltage in photovoltaic generating system；
The output terminal of control unit 101 is connected with the control terminal of Switching Power Supply 102；
The output head anode of Switching Power Supply 102 is connected by current limiting unit 103 with the input terminal of power clamp unit 104；
The negative pole of output end of Switching Power Supply 102 connects the earth；
The output terminal of power clamp unit 104 is connected with the DC side of inverter；
Switching Power Supply 102 for one by control unit 101 control adjustable DC out-put supply, be specifically as follows BUCK,
BOOST, BUCK-BOOST, CUK, normal shock, flyback, half-bridge, full-bridge, isolation and the non-isolated topology such as recommend.Do not limit herein,
Depending on its concrete application environment, in the protection domain of the application.
Preferably, as shown in Figure 1, the device of suppression PID effects further includes：Second switch K；
Second switch K is connected in series between the output head anode of Switching Power Supply 102 and the input terminal of current limiting unit 103,
The control terminal of second switch K is connected with the output terminal of control unit 101, suppresses PID to be realized according to the control of control unit 101
The switching of effector function.
Second switch K can be the switching devices such as relay, contactor and metal-oxide-semiconductor, be not specifically limited herein, depending on it
Depending on concrete application environment, in the protection domain of the application.
Specifically operation principle is：
Control unit 101 obtains collection value of the anode to big ground voltage of photovoltaic array in photovoltaic generating system, and passes through
The output voltage of closed loop adjustment control Switching Power Supply 102, preset value is adjusted to by the anode of photovoltaic array to big ground voltage；Root
According to the difference of preset value, the PID preventions for photovoltaic battery panel can be realized respectively and repair two kinds of functions.
What deserves to be explained is in the prior art there is also a part of device, it can realize that the PID for photovoltaic battery panel is pre-
Anti- and two kinds of functions of reparation；But it is generally required by setting anti-PID circuits on daytime and night anti-PID circuits, to switch reality
Existing two functions, cost are higher.
And the device of suppression PID effects provided in this embodiment, the realization of its two kinds of functions can share a circuit,
Without switching, it is only necessary to pass through the output voltage of closed loop adjusting switch power supply 102, you can respectively obtain anti-PID and anti-PID
Required voltage；Anti- PID functions and anti-PID functions can be realized by same circuit, circuit is simple and cost is low.
In addition, if night puts positive voltage between the anode and the earth of photovoltaic array, due to inverter diode, open
Closing pipe etc. influences, and when the cathode of photovoltaic array is less than the anode of photovoltaic array to big ground voltage to big ground voltage, will cause inverse
The capacitance become in device bears back-pressure, influences the service life of capacitance.The present embodiment makes inverter by setting power clamp unit 104
During in off-mode, the capacitance in inverter can be controlled to bear positive pressure.
Another embodiment of the present invention, on the basis of above-described embodiment, gives several tools of power clamp unit 104
Body way of realization：
Referring to Fig. 2, the high-potential output end of power clamp unit 104 is connected with photovoltaic array cathode；Power clamp unit
104 low potential output terminal is connected with photovoltaic array anode.
Alternatively, referring to Fig. 3, the high-potential output end of power clamp unit 104 is connected with photovoltaic array cathode；Power clamp
The low potential output terminal of unit 104 is connected with photovoltaic array midpoint A.
Alternatively, referring to Fig. 4, when the DC/DC that photovoltaic generating system includes being arranged between photovoltaic array and inverter becomes
During parallel operation (such as boost in Fig. 4), the high-potential output end of power clamp unit 104 is exported with the high potential of DC/DC converters
End is connected；The low potential output terminal of power clamp unit 104 is connected with the low potential output terminal of DC/DC converters.
Specifically, power clamp unit 104 includes：First series arm and the second series arm；Wherein：
First series arm includes the diode (D1 and D2 in such as Fig. 2 to Fig. 4) of M series connection, the first series arm
Cathode is the high-potential output end of power clamp unit 104；
Second series arm includes the diode (D3, D4, D5 and D6 in such as Fig. 2 to Fig. 4) of N number of series connection, the second series connection
The cathode of branch is the low potential output terminal of power clamp unit 104；
The anode of first series arm is connected with the anode of the second series arm, and tie point is power clamp unit 104
Input terminal；
M and N is positive integer, and M is less than N.
Fig. 2 is shown into Fig. 4 by taking M=2, N=4 as an example, naturally it is also possible to is taken other values, is not done herein specific
Limit, as long as can be less than N while preventing from flowing backwards with M and keep photovoltaic array cathode PV+ to be more than photovoltaic battle array to big ground voltage
Row anode PV- to big ground voltage, ensure when inverter is in off-mode, control inverter in capacitance bear positive pressure i.e.
Can, in the protection domain of the application.
Corresponding with the concrete form of above-mentioned power clamp unit 104, current limiting unit 103 includes：The current limliting being connected in series
Resistance R1 and fuse F1.
Rpv+ in Fig. 2 to Fig. 5 and Rpv- be respectively photovoltaic array cathode PV+ and photovoltaic array anode PV- over the ground etc.
Imitate impedance.By taking Fig. 2 as an example, the operation principle of the device of suppression PID effects is introduced, its operating mode is divided into night
Anti- PID operating modes, and, the anti-PID operating modes on daytime.
At night, the output voltage Vdc of Switching Power Supply 102 is connected to the anode PV- of photovoltaic array by current-limiting resistance R1, because
It is zero that voltage between night photovoltaic array positive electrode and negative electrode, which is approximately considered, thus photovoltaic array anode PV- to the earth
When voltage is lifted to required current potential, the cathode PV+ of photovoltaic array is also lifted to big ground voltage required current potential, so as to fulfill
The function of night anti-PID effects.
The output current of Switching Power Supply 102 is by B points, the earth is flow back into by D2, D1, Rpv+ all the way, in addition all the way
The earth is flowed back to by D3, D4, D5, D6, Rpv-.The then pressure drop V at the first series arm (D1-D2) both endsD1-2And second series connection branch
The pressure drop V at road (D3-D6) both endsD3-6Calculation formula be respectively：
VD1-2=-VPV++VB=2VD (1)
VD3-6=-VPV-+VB=4VD (2)
Wherein, VBFor the current potential of Fig. 2 B points into Fig. 4, VDFor the pressure drop of diode.
Formula (2)-(1) can obtain：
VPV=VPV+-VPV-=2VD (3)
That is the voltage Vpv between photovoltaic array positive electrode and negative electrode is clamped to the pressure drop of 2 diodes, and each
Diode drop about very little, therefore Vpv may be approximately equal to zero, i.e. Vpv- ≈ Vpv+, at this time, the isoboles of Fig. 2 as shown in fig. 6,
Vpv- and Vpv+, which is solved, to be obtained：
Wherein：
Can have from formula (4) and find out, pass through the output voltage Vdc of adjusting switch power supply 102, you can obtain anti-PID work
The target voltage of pattern.
On daytime, the output voltage Vdc of Switching Power Supply 102 is connected by current-limiting resistance R1, fuse F1, diode D3-D6
The anode PV- of photovoltaic array is connected to, the anode PV- of photovoltaic array can be made by the output voltage Vdc of adjusting switch power supply 102
0V is more than to big ground voltage, prevents PID effects from producing by anti-PID operating modes.
Different from night, daytime, photovoltaic array had electricity, it is assumed that the voltage between photovoltaic array positive electrode and negative electrode is
Vpv, at this time D1 and D2 reversely end, D3-D6 forward conductions, its conduction voltage drop is negligible, its equivalent circuit diagram such as Fig. 7
It is shown.
The anode PV- of photovoltaic array will be lifted to big ground voltage 0V, therefore Rpv- both end voltages are 0V, its impedance value
Change is no any influence on circuit.And Rpv+ both end voltages are Vpv, the change of its impedance value is to have an impact to circuit
, the output current of lifting effect and Switching Power Supply 102 can be influenced.
From figure 7 it can be seen that equivalent resistance Rpv- can be ignored the anode PV- of photovoltaic array over the ground, photovoltaic array
The cathode PV+ electricity between equivalent resistance Rpv+, current-limiting resistance R1, Switching Power Supply 102 and photovoltaic array positive electrode and negative electrode over the ground
Vpv series connection is pressed, can be obtained：
Formula (6) all can increase the output voltage Vdc of Switching Power Supply 102 as can be seen that Rpv+ reductions, Vpv and R1 increases
Add, photovoltaic array could be caused to be more than 0V to big ground voltage.
, can be with as shown in figure 5, specific on power clamp unit 104 in addition to the way of realization shown in Fig. 2 to Fig. 4
Including：The auxiliary DC power supply Vaux and first switch Kaux being connected in series；
The cathode of auxiliary DC power supply Vaux is connected with the DC side cathode of inverter, the anode of auxiliary DC power supply Vaux
It is connected (referring to Fig. 5) with the DC side anode of inverter by first switch Kaux；Alternatively, the cathode of auxiliary DC power supply Vaux
It is connected by first switch Kaux with the DC side cathode of inverter, the anode of auxiliary DC power supply Vaux and the direct current of inverter
Side anode is connected and (is not illustrated)；
The control terminal of first switch Kaux is connected with the output terminal of control unit 101.
First switch Kaux can be the switching devices such as relay, contactor and metal-oxide-semiconductor, be not specifically limited herein,
Depending on its concrete application environment, in the protection domain of the application.
At this time, current limiting unit 103 includes：Diode D7, current-limiting resistance R1 and the fuse F1 being connected in series, diode D7
Direction it is identical with the output current direction of Switching Power Supply 102.
At night, inverter is stopped, and first switch Kaux is closure, and auxiliary DC power supply Vaux accesses photovoltaic battle array
Between row cathode PV+ and anode PV- so that voltage clamping between photovoltaic array cathode and anode to positive voltage Vaux, inversion
Capacitance in device is not subject to back-pressure.Daytime photovoltaic array cathode and anode between voltage have positive voltage, it is therefore desirable to pass through
Control unit 101 turns off first switch Kaux, auxiliary DC power supply Vaux is disconnected with main circuit.
Fig. 2 to Fig. 5 illustrates several concrete implementation forms of device of suppression PID effects, but is not limited to that,
As long as same circuit can be made to be provided simultaneously with anti-PID and anti-PID functions and when inverter is in off-mode by above-mentioned principle
When, it can be ensured that the capacitance in inverter bears the scheme of positive pressure in the protection domain of the application.
Remaining operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described by the way of progressive in the present invention, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is referring to method part illustration
.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, the technical spirit according to the present invention is to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within technical solution of the present invention protection in the range of.
Claims (9)
- A kind of 1. device of suppression PID effects, it is characterised in that applied to photovoltaic generating system, the dress of the suppression PID effects Put including：Control unit, Switching Power Supply, current limiting unit and power clamp unit；Wherein：The input terminal of described control unit is connected with the communication terminal of inverter in the photovoltaic generating system；The output terminal of described control unit is connected with the control terminal of the Switching Power Supply；The output head anode of the Switching Power Supply is connected by the current limiting unit with the input terminal of the power clamp unit；Institute The negative pole of output end for stating Switching Power Supply connects the earth；The output terminal of the power clamp unit is connected with the DC side of the inverter；The anode that described control unit is used to gather photovoltaic array in the photovoltaic generating system passes through closed loop to big ground voltage The output voltage of Switching Power Supply described in adjustment control, preset value is adjusted to by the anode of photovoltaic array to big ground voltage；The power clamp unit is used for when the inverter is in off-mode, controls the capacitance in the inverter to bear Positive pressure.
- 2. the device of suppression PID effects according to claim 1, it is characterised in that the height electricity of the power clamp unit Position output terminal is connected with photovoltaic array cathode；The low potential output terminal of the power clamp unit is connected with photovoltaic array anode or midpoint.
- 3. the device of suppression PID effects according to claim 1, it is characterised in that wrapped when in the photovoltaic generating system When including the DC/DC converters being arranged between photovoltaic array and the inverter, the high potential output of the power clamp unit End is connected with the high-potential output end of the DC/DC converters；The low potential output terminal of the power clamp unit and the DC/ The low potential output terminal of DC converters is connected.
- 4. the device of the suppression PID effects according to Claims 2 or 3, it is characterised in that the power clamp unit bag Include：First series arm and the second series arm；Wherein：First series arm includes the diode of M series connection, and the cathode of first series arm is the power clamp The high-potential output end of unit；Second series arm includes the diode of N number of series connection, and the cathode of second series arm is the power clamp The low potential output terminal of unit；The anode of first series arm is connected with the anode of second series arm, and tie point is the power clamp list The input terminal of member；M and N is positive integer, and M is less than N.
- 5. the device of suppression PID effects according to claim 4, it is characterised in that the current limiting unit includes：Series connection connects The current-limiting resistance and fuse connect.
- 6. the device of suppression PID effects according to claim 1, it is characterised in that the power clamp unit includes：String Join the auxiliary DC power supply and first switch of connection；The cathode of the auxiliary DC power supply is connected with the DC side cathode of the inverter, the anode of the auxiliary DC power supply It is connected by the first switch with the DC side anode of the inverter；Alternatively, the cathode of the auxiliary DC power supply passes through The first switch is connected with the DC side cathode of the inverter, the anode of the auxiliary DC power supply and the inverter DC side anode is connected；The control terminal of the first switch is connected with the output terminal of described control unit.
- 7. the device of suppression PID effects according to claim 6, it is characterised in that the current limiting unit includes：Series connection connects Diode, current-limiting resistance and the fuse connect, the direction of the diode are identical with the output current direction of the Switching Power Supply.
- 8. the device of suppression PID effects according to claim 1, it is characterised in that further include：Second switch；Described Two switches are connected in series between the output head anode of the Switching Power Supply and the input terminal of the current limiting unit, and described second opens The control terminal of pass is connected with the output terminal of described control unit.
- 9. the device of suppression PID effects according to claim 1, it is characterised in that the Switching Power Supply is：BUCK、 Any one in BOOST, BUCK-BOOST, CUK, normal shock, flyback, half-bridge, full-bridge and push-pull type topology.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444650.5A CN108011583B (en) | 2017-12-27 | 2017-12-27 | Device for inhibiting PID effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444650.5A CN108011583B (en) | 2017-12-27 | 2017-12-27 | Device for inhibiting PID effect |
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| CN108011583A true CN108011583A (en) | 2018-05-08 |
| CN108011583B CN108011583B (en) | 2020-01-21 |
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| EP3567692A1 (en) * | 2018-05-10 | 2019-11-13 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (pv) modules |
| WO2020125270A1 (en) * | 2018-12-21 | 2020-06-25 | 华为技术有限公司 | Compensation circuit and method for potential induced degradation, and power module and photovoltaic system |
| CN111478662A (en) * | 2020-04-29 | 2020-07-31 | 上海质卫环保科技有限公司 | Discharging method and circuit of solar power station pressurizing device |
| CN112152260A (en) * | 2020-09-17 | 2020-12-29 | 科华恒盛股份有限公司 | Photovoltaic power generation system PID effect repairing and inhibiting device |
| CN112583041A (en) * | 2019-09-27 | 2021-03-30 | 阳光电源股份有限公司 | Inverter, inversion system and control method |
| CN113271009A (en) * | 2021-06-28 | 2021-08-17 | 阳光电源股份有限公司 | DC/DC conversion unit and energy conversion system |
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