CN206962426U - A kind of device for suppressing photovoltaic module PID effects - Google Patents
A kind of device for suppressing photovoltaic module PID effects Download PDFInfo
- Publication number
- CN206962426U CN206962426U CN201720471209.5U CN201720471209U CN206962426U CN 206962426 U CN206962426 U CN 206962426U CN 201720471209 U CN201720471209 U CN 201720471209U CN 206962426 U CN206962426 U CN 206962426U
- Authority
- CN
- China
- Prior art keywords
- source
- circuit
- photovoltaic module
- resistance
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a kind of device for suppressing photovoltaic module PID effects, the device is connected between AC three-phase line and ground wire, including virtual midpoint construction circuit, dc source and control circuit；Wherein, virtual midpoint construction circuit connects inductance by three-phase star and a resistance forms, three-phase star connects inductance and is respectively connected to AC three-phase line, the midpoint of one termination three-phase star connection inductance of resistance, one output end of the other end connection dc source of resistance, another output head grounding line of dc source, the exportable positive level of dc source or negative level, and then the lifting of AC phase conductors voltage-to-ground is realized, and then realize the lifting of components side both positive and negative polarity voltage-to-ground.The utility model need not be handled every inverter or every photovoltaic module; the positive and negative bias adjustment of component and the creepage protection function of whole electricity generation system can be achieved; do not need leakage current sensor and relay, have it is simple in construction, safe and reliable, cost is low, low power consumption and other advantages.
Description
Technical field
A kind of device for suppressing photovoltaic module PID effects is the utility model is related to, belongs to technical field of photovoltaic power generation.
Background technology
Potential potential induction attenuation（PID）Effect refers to photovoltaic module under the effect of long-term negative bias high pressure, power generation performance drop
Low phenomenon.
Component both positive and negative polarity voltage-to-ground can be influenceed by virtual neutral-point-clamped in photovoltaic DC-to-AC converter AC, and then solved
PID phenomenons（N-type photovoltaic module need to be such that negative pole biases over the ground need to be such that positive pole biases over the ground less than 0V more than 0V, p-type photovoltaic module）.
Load is connect by three-phase star and realizes that the traditional approach at virtual midpoint includes using three pole reactor, three phase capacitance, three-phase resistance, or three-phase
Again there is the shortcomings that short circuit current is excessive or loss is too high in series resistance, these modes in actual applications at resistance midpoint.
Utility model content
Technical problem to be solved in the utility model is the defects of overcoming prior art, there is provided one kind suppresses photovoltaic module
The device of PID effects,
In order to solve the above technical problems, the utility model provides a kind of device for suppressing photovoltaic module PID effects, including void
Intend midpoint construction circuit, dc source and control circuit；The virtual midpoint construction circuit incoming transport triple line, it is described virtual
Midpoint construction circuit connects inductance by three-phase star and a resistance forms, the midpoint of a termination three-phase star connection inductance of resistance, electricity
One output end of the other end connection dc source of resistance；Another output head grounding line of the dc source；The direct current
Power supply is connected with control circuit.
Foregoing three-phase star connects inductance and is respectively connected to AC three-phase line.
The exportable positive level of foregoing dc source or negative level.
Foregoing control circuit includes sample circuit, telecommunication circuit and controller；The sample circuit is parallel to resistance two
Side, the sample circuit and telecommunication circuit are all connected with controller, the input of the controller connection dc source.
Foregoing sample circuit is isolation sample circuit or non-isolated sample circuit.
Foregoing telecommunication circuit is wired communication mode or communication.
The beneficial effect that the utility model is reached：
The utility model need not be handled every inverter or every photovoltaic module, and the positive negative bias of component can be achieved
Pressure regulation and the creepage protection function of whole electricity generation system, it is not necessary to leakage current sensor and relay, there is simple in construction, peace
It is complete reliable, cost is low, low power consumption and other advantages.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model device.
Embodiment
The utility model is further described below.Following examples are only used for clearly illustrating the utility model
Technical scheme, and the scope of protection of the utility model can not be limited with this.
As shown in figure 1, the device of the present utility model for suppressing photovoltaic module PID effects, the device are connected in AC three-phase
Between line and ground wire, including virtual midpoint construction circuit 101, dc source 102 and control circuit 103.
Virtual midpoint construction circuit 101 connects inductance by three-phase star and a resistance forms, and three-phase star connects inductance and connects friendship respectively
Flow triple line, a termination inductance midpoint of resistance, an output end of another termination dc source 102 of resistance.
One output terminating resistor of dc source 102, another output head grounding line, dc source 102 can be controlled defeated
Go out positive level or negative level, the regulation requirement that different type photovoltaic module both positive and negative polarity biases over the ground can be met.
Control circuit 103 includes sample circuit, telecommunication circuit and controller.Sample circuit, for gathering resistance both ends electricity
Pressure value, the current value for flowing through resistance can be calculated by magnitude of voltage and resistance, to judge whether leaked in electricity generation system
Electrification, voltage sample mode can be that isolation samples, or non-isolated sampling.Telecommunication circuit can receive external command transmission
To controller.It should be noted that communication mode can be various wired or wireless transmission means.Controller passes through telecommunication circuit
After obtaining external command, regulation DC power output voltage reaches command value, and then realizes the lifting of AC phase conductors voltage-to-ground,
And then realize the lifting of components side both positive and negative polarity voltage-to-ground.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and deformation can also be made, these change
Enter and deform and also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of device for suppressing photovoltaic module PID effects, it is characterised in that construct circuit, dc source including virtual midpoint
And control circuit；The virtual midpoint construction circuit incoming transport triple line, the virtual midpoint construction circuit are connect by three-phase star
Inductance and a resistance composition, the midpoint of a termination three-phase star connection inductance of resistance, the other end connection dc source of resistance
An output end；Another output head grounding line of the dc source；The dc source is connected with control circuit.
A kind of 2. device for suppressing photovoltaic module PID effects according to claim 1, it is characterised in that the three-phase star
Connect inductance and be respectively connected to AC three-phase line.
A kind of 3. device for suppressing photovoltaic module PID effects according to claim 1, it is characterised in that the direct current
The exportable positive level in source or negative level.
A kind of 4. device for suppressing photovoltaic module PID effects according to claim 1, it is characterised in that the control electricity
Road includes sample circuit, telecommunication circuit and controller；The sample circuit is parallel to resistance both sides, the sample circuit and communication
Circuit is all connected with controller, the input of the controller connection dc source.
A kind of 5. device for suppressing photovoltaic module PID effects according to claim 4, it is characterised in that the sampling electricity
Road is isolation sample circuit or non-isolated sample circuit.
A kind of 6. device for suppressing photovoltaic module PID effects according to claim 4, it is characterised in that the communication electricity
Road is wired communication mode or communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471209.5U CN206962426U (en) | 2017-04-28 | 2017-04-28 | A kind of device for suppressing photovoltaic module PID effects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471209.5U CN206962426U (en) | 2017-04-28 | 2017-04-28 | A kind of device for suppressing photovoltaic module PID effects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962426U true CN206962426U (en) | 2018-02-02 |
Family
ID=61373212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720471209.5U Expired - Fee Related CN206962426U (en) | 2017-04-28 | 2017-04-28 | A kind of device for suppressing photovoltaic module PID effects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206962426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113687128A (en) * | 2021-09-08 | 2021-11-23 | 阳光电源股份有限公司 | Current detection method, device and equipment of photovoltaic PID suppression circuit |
-
2017
- 2017-04-28 CN CN201720471209.5U patent/CN206962426U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113687128A (en) * | 2021-09-08 | 2021-11-23 | 阳光电源股份有限公司 | Current detection method, device and equipment of photovoltaic PID suppression circuit |
| CN113687128B (en) * | 2021-09-08 | 2024-05-14 | 阳光电源股份有限公司 | Current detection method, device and equipment of photovoltaic PID (proportion integration differentiation) suppression circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203840210U (en) | AC inverter circuit | |
| CN107069661A (en) | A kind of device for suppressing photovoltaic module PID effects | |
| CN105470963A (en) | Active power filter and control method therefor | |
| CN103606917A (en) | Power transmission system for improving conveying capacity of urban power grid through non-sine alternating current transmission | |
| CN106160651A (en) | A kind of system suppressing photovoltaic battery panel PID effect | |
| CN109510213A (en) | Based on traction-compensator transformer cophase supply comprehensive compensating device and its method | |
| CN106772128B (en) | A kind of energy consumption type alternating current electronic load and its method of work | |
| CN104753359B (en) | A kind of power frequency electric power electronic transformer and its implementation | |
| CN209344791U (en) | A kind of traction substation comprehensive compensating device based on homo-phase traction transformer | |
| CN206962426U (en) | A kind of device for suppressing photovoltaic module PID effects | |
| CN104767212B (en) | Hybrid power electronic transformer | |
| CN206523614U (en) | A kind of energy consumption type alternating current electronic load | |
| CN203312823U (en) | Self-coupling voltage regulating type reactive compensation device | |
| CN208939596U (en) | A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation | |
| CN209344790U (en) | Based on traction-compensator transformer cophase supply comprehensive compensating device | |
| CN110649609A (en) | Single-phase or two-phase-to-three-phase power supply structure using YNVd transformer | |
| CN202872370U (en) | 3 to 35000 KV graded compensation type automatic voltage regulating device | |
| CN207053406U (en) | A kind of electric power electric transformer of tandem mesohigh power network | |
| CN110350566A (en) | Three end direct current systems of the controller containing DC power flow | |
| CN205986283U (en) | Improve device of electric automobile direct current charging system standby power factor | |
| CN109256785A (en) | Cophase supply comprehensive compensating device and its method based on single-phase transformation and YNd compensation | |
| CN209344780U (en) | Cophase supply comprehensive compensating device based on single-phase transformation and Dd compensation | |
| CN203660891U (en) | Isolation-type high-frequency switching constant current converter | |
| CN203617944U (en) | Rectification system | |
| CN203251084U (en) | Bi-directional current limiter based on bi-directional BUCK converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |