CN207098967U - Photovoltaic combining inverter common mode current suppression circuit - Google Patents
Photovoltaic combining inverter common mode current suppression circuit Download PDFInfo
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- CN207098967U CN207098967U CN201720236555.5U CN201720236555U CN207098967U CN 207098967 U CN207098967 U CN 207098967U CN 201720236555 U CN201720236555 U CN 201720236555U CN 207098967 U CN207098967 U CN 207098967U
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- circuit
- combining inverter
- photovoltaic combining
- electric capacity
- common mode
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- 230000001629 suppression Effects 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 230000005611 electricity Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
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- Inverter Devices (AREA)
Abstract
The utility model provides photovoltaic combining inverter common mode current suppression circuit, including photovoltaic combining inverter, and bus capacitor loop and switch tube loop are parallel between the positive pole and negative pole of photovoltaic combining inverter；The negative pole of photovoltaic combining inverter is connected with earth terminal, electric capacity is provided between the positive pole and earth terminal of photovoltaic combining inverter, electric capacity is provided between the negative pole and earth terminal of photovoltaic combining inverter, in addition to the capacitor lines one and capacitor lines two that one end is connected with bus capacitor loop, one end is connected with circuit one, circuit two respectively.By way of connecting electric capacity between direct-flow input end bus capacitor midpoint and inverter circuit filter inductance, realize and use the smaller hardware circuit volume of lower cost to realize the suppression to inverter circuit common mode current, and play more preferable filter capacity.
Description
Technical field
The utility model belongs to control circuit field, more particularly to photovoltaic combining inverter common mode current suppression circuit.
Background technology
Currently in photovoltaic combining inverter common mode current suppression processing, often there is the phenomenon of electric current crosstalk, and mesh
Preceding no more effective inhibition so that the effect of overall photovoltaic combining inverter is poor.
Utility model content
In order to solve shortcoming and defect present in prior art, the utility model provides smaller hard using lower cost
Part circuit volume realizes the photovoltaic combining inverter common mode current suppression circuit of the suppression to inverter circuit common mode current.
In order to reach above-mentioned technical purpose, the utility model provides photovoltaic combining inverter common mode current suppression circuit,
The suppression circuit, including photovoltaic combining inverter, bus electricity is parallel between the positive pole and negative pole of photovoltaic combining inverter
Hold loop and switch tube loop；
The negative pole of photovoltaic combining inverter is connected with earth terminal, is set between the positive pole and earth terminal of photovoltaic combining inverter
There is electric capacity Y1, electric capacity Y2 is provided between the negative pole and earth terminal of photovoltaic combining inverter, is set between circuit one and earth terminal
There is electric capacity Y3, electric capacity Y4 is provided between circuit two and earth terminal, the circuit being connected with earth terminal is provided with tube loop is switched
One and circuit two；
Wherein, in addition to one end is connected with bus capacitor loop, one end is connected with circuit one, circuit two respectively capacitor line
Road one and capacitor lines two.
Optionally, electric capacity C5 is provided with capacitor lines one, electric capacity C6 is provided with capacitor lines two.
Optionally, the bus one for being in series with electric capacity C1, electric capacity C2 is provided with bus capacitor loop, and is in series with electric capacity
C3, electric capacity C4 bus two.
Optionally, the switching circuitry one for being in series with switching tube IGBT1, IGBT3, and series connection are provided with switch tube loop
There are switching tube IGBT2, IGBT4 switching circuitry two.
Optionally, inductance L1 is provided with circuit one, inductance L2 is provided with circuit two.
Optionally, the circuit three including being in series with electric capacity C7 and resistance R1, one end and the phase of circuit one of circuit three are additionally provided with
Even, the other end of circuit three is connected with circuit two.
The beneficial effect that technical scheme provided by the utility model is brought is：
By way of connecting electric capacity between direct-flow input end bus capacitor midpoint and inverter circuit filter inductance, realize
Suppression to inverter circuit common mode current is realized using the smaller hardware circuit volume of lower cost, and plays more preferable filtering
Ability.
Brief description of the drawings
It is required in being described below to embodiment to use in order to illustrate more clearly of the technical solution of the utility model
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation of photovoltaic combining inverter common mode current suppression circuit provided by the utility model.
Embodiment
To make structure and advantage of the present utility model clearer, structure of the present utility model is made below in conjunction with accompanying drawing
It is further described through.
Embodiment one
The utility model provides photovoltaic combining inverter common mode current suppression circuit, as shown in figure 1, described suppress electricity
Road, including photovoltaic combining inverter, bus capacitor loop is parallel between the positive pole and negative pole of photovoltaic combining inverter and is opened
Close tube loop；
The negative pole of photovoltaic combining inverter is connected with earth terminal, is set between the positive pole and earth terminal of photovoltaic combining inverter
There is electric capacity Y1, electric capacity Y2 is provided between the negative pole and earth terminal of photovoltaic combining inverter, is set between circuit one and earth terminal
There is electric capacity Y3, electric capacity Y4 is provided between circuit two and earth terminal, the circuit being connected with earth terminal is provided with tube loop is switched
One and circuit two；
Wherein, in addition to one end is connected with bus capacitor loop, one end is connected with circuit one, circuit two respectively capacitor line
Road one and capacitor lines two.
In force, for structure such as Fig. 1 institutes of the suppression circuit suppressed to photovoltaic combining inverter common mode current
Show, the bus capacitor circuit and switching tube electricity being provided with the suppression circuit between the photovoltaic combining inverter positive pole and negative pole of connection
Road, it is provided with bus capacitor loop and is in series with electric capacity C1, electric capacity C2 bus one, and is in series with electric capacity C3, electric capacity C4
Bus two.
The negative pole of photovoltaic combining inverter is connected with earth terminal, is set between the positive pole and earth terminal of photovoltaic combining inverter
There is electric capacity Y1, electric capacity Y2 is provided between the negative pole and earth terminal of photovoltaic combining inverter, is set between circuit one and earth terminal
There is electric capacity Y3, electric capacity Y4 is provided between circuit two and earth terminal, the circuit being connected with earth terminal is provided with tube loop is switched
One and circuit two；Inductance L1 is provided with circuit one, inductance L2 is provided with circuit two.Be additionally provided with including be in series with electric capacity C7 and
Resistance R1 circuit three, one end of circuit three are connected with circuit one, and the other end of circuit three is connected with circuit two.Grid-connected
Ammeter is provided between the negative pole and earth terminal of inverter.
Capacitor lines one and capacitor lines two are provided with bus capacitor loop, capacitor lines one are provided with electric capacity C5, electricity
Hold circuit two and be provided with electric capacity C6, the other end of capacitor lines one is connected to the front end of inductance L1 on circuit one, condenser network two
The other end be connected to the front end of inductance L2 on circuit two.Electric capacity C5, electric capacity C6 as direct-flow input end bus capacitor midpoint and
Electric capacity is connected between inverter circuit filter inductance.
The switching circuitry one for being in series with switching tube IGBT1, IGBT3 is provided with switch tube loop, and is in series with switch
Pipe IGBT2, IGBT4 switching circuitry two.
When inverter circuit work switching tube IGBT1, IGBT2, IGBT3, IGBT4 work, photovoltaic combining inverter output
Common mode current forms shunting circuit by C5, C6 and bus capacitor C1, C2, C3, C4, so as to reach suppression common mode electric current
Purpose.
Before electric capacity C5, electric capacity C6 are connected with bus capacitor C1, C2, C3, C4, common mode current that ammeter detects
Oscillogram, after electric capacity C5, electric capacity C6 are connected with bus capacitor C1, C2, C3, C4, common mode current that ammeter detects
Oscillogram,
After filter capacitor C5, C6 and dc-link capacitance C1, C2, C3, C4 midpoints connect, to suppressing in inverter circuit
Common mode current achieves good effect.
The utility model provides photovoltaic combining inverter common mode current suppression circuit, including photovoltaic combining inverter,
Bus capacitor loop and switch tube loop are parallel between the positive pole and negative pole of photovoltaic combining inverter；Photovoltaic combining inverter
Negative pole be connected with earth terminal, electric capacity is provided between the positive pole and earth terminal of photovoltaic combining inverter, in photovoltaic grid-connected inversion
Electric capacity is provided between the negative pole and earth terminal of device, in addition to one end is connected with bus capacitor loop, one end respectively with circuit one,
The capacitor lines one and capacitor lines two that circuit two connects.By being filtered at direct-flow input end bus capacitor midpoint and inverter circuit
The mode of electric capacity is connected between ripple inductance, realizes that use the smaller hardware circuit volume of lower cost to realize is total to inverter circuit
The suppression of mould electric current, and play more preferable filter capacity.
Each sequence number in above-described embodiment is for illustration only, during the assembling or use that do not represent each part
Sequencing.
Embodiment of the present utility model is the foregoing is only, it is all in the utility model not to limit the utility model
Spirit and principle within, any modification, equivalent substitution and improvements made etc., should be included in protection model of the present utility model
Within enclosing.
Claims (6)
1. photovoltaic combining inverter common mode current suppression circuit, it is characterised in that the suppression circuit, including photovoltaic grid-connected inversion
Device, bus capacitor loop and switch tube loop are parallel between the positive pole and negative pole of photovoltaic combining inverter；
The negative pole of photovoltaic combining inverter is connected with earth terminal, and electricity is provided between the positive pole and earth terminal of photovoltaic combining inverter
Hold Y1, electric capacity Y2 is provided between the negative pole and earth terminal of photovoltaic combining inverter, electricity is provided between circuit one and earth terminal
Hold Y3, electric capacity Y4 be provided between circuit two and earth terminal, in tube loop is switched provided with the circuit one that is connected with earth terminal and
Circuit two；
Wherein, in addition to one end is connected with bus capacitor loop, one end is connected with circuit one, circuit two respectively capacitor lines one
With capacitor lines two.
2. photovoltaic combining inverter common mode current suppression circuit according to claim 1, it is characterised in that in capacitor lines
One is provided with electric capacity C5, and electric capacity C6 is provided with capacitor lines two.
3. photovoltaic combining inverter common mode current suppression circuit according to claim 1, it is characterised in that in bus capacitor
Loop is provided with the bus one for being in series with electric capacity C1, electric capacity C2, and is in series with electric capacity C3, electric capacity C4 bus two.
4. photovoltaic combining inverter common mode current suppression circuit according to claim 1, it is characterised in that returned in switching tube
Road is provided with the switching circuitry one for being in series with switching tube IGBT1, IGBT3, and is in series with switching tube IGBT2, IGBT4 switch
Loop two.
5. photovoltaic combining inverter common mode current suppression circuit according to claim 1, it is characterised in that on circuit one
Provided with inductance L1, inductance L2 is provided with circuit two.
6. photovoltaic combining inverter common mode current suppression circuit according to claim 5, it is characterised in that be additionally provided with including
Electric capacity C7 and resistance R1 circuit three are in series with, one end of circuit three is connected with circuit one, the other end and the circuit two of circuit three
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720236555.5U CN207098967U (en) | 2017-03-10 | 2017-03-10 | Photovoltaic combining inverter common mode current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720236555.5U CN207098967U (en) | 2017-03-10 | 2017-03-10 | Photovoltaic combining inverter common mode current suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207098967U true CN207098967U (en) | 2018-03-13 |
Family
ID=61549797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720236555.5U Active CN207098967U (en) | 2017-03-10 | 2017-03-10 | Photovoltaic combining inverter common mode current suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207098967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736699A (en) * | 2018-07-12 | 2018-11-02 | 广东寰宇电子科技股份有限公司 | A kind of circuit inhibiting photovoltaic inverter leakage current |
-
2017
- 2017-03-10 CN CN201720236555.5U patent/CN207098967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736699A (en) * | 2018-07-12 | 2018-11-02 | 广东寰宇电子科技股份有限公司 | A kind of circuit inhibiting photovoltaic inverter leakage current |
| CN108736699B (en) * | 2018-07-12 | 2024-04-26 | 广东寰宇电子科技股份有限公司 | Circuit for inhibiting leakage current of photovoltaic inverter |
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| CP03 | Change of name, title or address |
Address after: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang arrow network energy technology Co.,Ltd. Address before: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG SOLAX NETWORK ENERGY TECHNOLOGY Co.,Ltd. |