CN203312773U - Connection control structure for photovoltaic inverter direct current side - Google Patents
Connection control structure for photovoltaic inverter direct current side Download PDFInfo
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- CN203312773U CN203312773U CN2013203740687U CN201320374068U CN203312773U CN 203312773 U CN203312773 U CN 203312773U CN 2013203740687 U CN2013203740687 U CN 2013203740687U CN 201320374068 U CN201320374068 U CN 201320374068U CN 203312773 U CN203312773 U CN 203312773U
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- photovoltaic
- converter
- inverter
- voltage release
- power supply
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Abstract
The utility model relates to a breaker device, especially relates to a connection control structure for a photovoltaic inverter direct current side, and belongs to the technical field of photovoltaic inverters. According to the technical scheme provided in the utility model, the connection control structure for the photovoltaic inverter direct current side comprises a photovoltaic cell panel and a photovoltaic inverter which is for inverting a direct current output by the photovoltaic cell panel into an alternating current. The output terminal of the photovoltaic cell panel is connected with the input terminal of the photovoltaic inverter through a no-voltage release. The photovoltaic inverter is connected with an inverter control circuit. The inverter control circuit is connected with a power supply which is for supplying power to the no-voltage release. The inverter control circuit adjusts values of voltages which are loaded on the no-voltage release by the power supply, so that the connection state of the photovoltaic cell panel and the photovoltaic inverter is controlled through the no-voltage release. The connection control structure for the photovoltaic inverter direct current side is simple and compact in structure; and through the connection control structure, work reliability of the photovoltaic inverter is improved, service life is prolonged and usage cost is reduced.
Description
Technical field
The utility model relates to a kind of tripper, and especially a kind of connection control structure that is applied to the photovoltaic DC-to-AC converter DC side belongs to the technical field of photovoltaic DC-to-AC converter.
Background technology
Photovoltaic DC-to-AC converter is the direct current that photovoltaic battery panel produces to be changed into to the electric equipment of alternating current, the design service life of whole equipment is generally about 25 years, and the operational environment of photovoltaic DC-to-AC converter is mostly more severe, therefore quite high to the reliability requirement of photovoltaic DC-to-AC converter.The direct current input side of photovoltaic DC-to-AC converter with exchange grid-connected side and all need to use switching device, the AC switching device is connected to the grid for the alternating current by inverter output, and the switching device of DC side is for controlling photovoltaic battery panel and photovoltaic DC-to-AC converter, therefore the selection of DC side switching device is most important, and it is related to the energy source of whole system.
The switch of existing inverter direct-flow side uses the switchgears such as relay, circuit breaker more.Use the shortcoming of this device a lot, the most fatal shortcoming is when the faults such as photovoltaic DC-to-AC converter inside is short-circuited, the control section of photovoltaic DC-to-AC converter can't provide energy and can't send the instruction of cutting off DC voltage, cause the energy that can't cut off the side direct voltage, when the energy of DC side is constantly supplied with, thereby lead to the major accidents such as fire.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of connection control structure that is applied to the photovoltaic DC-to-AC converter DC side is provided, and it is simple and compact for structure, improves the reliability of photovoltaic DC-to-AC converter work, increases the service life, and reduces use cost.
According to the technical scheme that the utility model provides, the described connection control structure that is applied to the photovoltaic DC-to-AC converter DC side, comprise that it is the photovoltaic DC-to-AC converter of alternating current that photovoltaic battery panel reaches for described photovoltaic battery panel is exported to DC inverter; The output of described photovoltaic battery panel is connected with the input of photovoltaic DC-to-AC converter by no-voltage release, photovoltaic DC-to-AC converter is connected with inverter control circuit, inverter control circuit is connected with the power supply for to the no-voltage release power supply, inverter control circuit is regulated power supply and is carried in the magnitude of voltage on no-voltage release, by no-voltage release, to control the connection status of photovoltaic battery panel and photovoltaic DC-to-AC converter.
The output of described photovoltaic DC-to-AC converter is connected with electrical network.
Advantage of the present utility model: photovoltaic battery panel is connected with the direct current input side of photovoltaic DC-to-AC converter by no-voltage release, photovoltaic DC-to-AC converter is connected with inverter control circuit, inverter control circuit is connected with the power supply to the no-voltage release power supply, inverter control circuit is carried in by controlling power supply the state that voltage on no-voltage release is regulated no-voltage release, can realize controlling being connected of photovoltaic DC-to-AC converter and photovoltaic battery panel by no-voltage release, while guaranteeing the photovoltaic DC-to-AC converter fault, the disconnection of photovoltaic battery panel and photovoltaic DC-to-AC converter, guarantee the reliability of whole photovoltaic system, simple and compact for structure, increase the service life, reduce use cost.
The accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Description of reference numerals: 1-photovoltaic battery panel, 2-no-voltage release, 3-photovoltaic DC-to-AC converter, 4-inverter control circuit and 5-power supply.
Embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1: in order to guarantee 1 functional reliability be connected of photovoltaic DC-to-AC converter 3 and photovoltaic battery panel, the utility model comprises photovoltaic battery panel 1 and is the photovoltaic DC-to-AC converter 3 of alternating current for described photovoltaic battery panel 1 is exported to DC inverter; The output of described photovoltaic battery panel 1 is connected with the input of photovoltaic DC-to-AC converter 3 by no-voltage release 2, photovoltaic DC-to-AC converter 3 is connected with inverter control circuit 4, inverter control circuit 4 is connected with the power supply 5 for to no-voltage release 2 power supplies, inverter control circuit 4 is regulated power supply 5 and is carried in the magnitude of voltage on no-voltage release 2, by no-voltage release 2, to control the connection status of photovoltaic battery panel 1 and photovoltaic DC-to-AC converter 3.
Particularly, described photovoltaic battery panel 1 can be converted to direct current by solar energy, the operating voltage of no-voltage release 2 is provided by power supply 5, power supply 5 can be by external electrical network or the power supply of other supply power modes, the operating voltage that power supply 5 can provide for whole photovoltaic system, the supply power voltage of 5 pairs of no-voltage releases 2 of power supply can be regulated separately, and the control end of power supply 5 is connected with inverter control circuit 4, and 3 of inverter control circuit 4 and photovoltaic DC-to-AC converters interconnect.Inverter control circuit 4 can adopt the existing universal circuit that photovoltaic DC-to-AC converter 3 is controlled, inverter control circuit 4 can be controlled the operating state of photovoltaic DC-to-AC converter 3, when in photovoltaic DC-to-AC converter 3, producing fault, inverter control circuit 4 can obtain corresponding fault, and the operating state of remainder in the control photovoltaic inverting system, to coordinate the operating state of photovoltaic DC-to-AC converter 3, guarantee the functional reliability of photovoltaic DC-to-AC converter 3.In the utility model embodiment, can also be at the outer increase no-voltage release of power supply 5 power source regulating circuit, inverter control circuit 4 is connected with the no-voltage release power source regulating circuit of described increase, when needs turn-off being connected or the interior generation fault of photovoltaic DC-to-AC converter 3 of photovoltaic battery panel 1 and 3 of photovoltaic DC-to-AC converters, while need turn-offing being connected between photovoltaic battery panel 1 and photovoltaic DC-to-AC converter 3, circuit control device 4 can stop by the no-voltage release power source regulating circuit power supply of 5 pairs of no-voltage releases 2 of power supply.
The utility model is by the direct current input side of no-voltage release 2 access photovoltaic DC-to-AC converters 3.When power supply 5 power failures or due to reasons such as photovoltaic DC-to-AC converter 3 internal short-circuits, while need to or cause the output voltage reduction too much (while reaching the decompression voltage of no-voltage release 2) of power supply 5, the coil current of no-voltage release 2 will disappear or reduce, losing electromagnetic force or electromagnetic force is not enough to hold moving unshakable in one's determination, thereby disconnection main contact, cut-out photovoltaic battery panel 1 is connected with 3 of photovoltaic DC-to-AC converters, the accident hazard caused while avoiding photovoltaic DC-to-AC converter 3 fault.When photovoltaic DC-to-AC converter is shut down for 3 nights; the direct voltage of photovoltaic battery panel 1 output is zero; but should guarantee that no-voltage release 2 still is in power supply state; so that photovoltaic battery panel 1 was connected with photovoltaic DC-to-AC converter 3 all the time at night; so that the start in morning detection, thereby power supply 5 can be guaranteed confession electrical stability and the reliability of power supply 5 from the supply power mode of electrical network or station electricity consumption.No-voltage release 2 be not every day all break-make once, only in photovoltaic DC-to-AC converter 3 faults or need to initiatively send instruction by inverter control circuit 4 time, just can move, greatly improved the useful life of no-voltage release 2.
Claims (2)
1. a connection control structure that is applied to the photovoltaic DC-to-AC converter DC side, comprise that it is the photovoltaic DC-to-AC converter (3) of alternating current that photovoltaic battery panel (1) reaches for described photovoltaic battery panel (1) is exported to DC inverter; It is characterized in that: the output of described photovoltaic battery panel (1) is connected with the input of photovoltaic DC-to-AC converter (3) by no-voltage release (2), photovoltaic DC-to-AC converter (3) is connected with inverter control circuit (4), inverter control circuit (4) is connected with the power supply (5) for to no-voltage release (2) power supply, inverter control circuit (4) is regulated power supply (5) and is carried in the magnitude of voltage on no-voltage release (2), by no-voltage release (2), to control the connection status of photovoltaic battery panel (1) and photovoltaic DC-to-AC converter (3).
2. the connection control structure that is applied to the photovoltaic DC-to-AC converter DC side according to claim 1, it is characterized in that: the output of described photovoltaic DC-to-AC converter (3) is connected with electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203740687U CN203312773U (en) | 2013-06-26 | 2013-06-26 | Connection control structure for photovoltaic inverter direct current side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203740687U CN203312773U (en) | 2013-06-26 | 2013-06-26 | Connection control structure for photovoltaic inverter direct current side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312773U true CN203312773U (en) | 2013-11-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203740687U Expired - Lifetime CN203312773U (en) | 2013-06-26 | 2013-06-26 | Connection control structure for photovoltaic inverter direct current side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203312773U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375519A (en) * | 2015-11-20 | 2016-03-02 | 湖南红太阳新能源科技有限公司 | Grid-connected photovoltaic power generation system and control method therefor |
| CN112051502A (en) * | 2020-09-01 | 2020-12-08 | 三门核电有限公司 | Offline action testing device of aviation plug-in circuit breaker |
| WO2022121430A1 (en) * | 2020-12-07 | 2022-06-16 | 阳光电源股份有限公司 | Medium-voltage photovoltaic grid-connection inverter system, and photovoltaic power generation system |
-
2013
- 2013-06-26 CN CN2013203740687U patent/CN203312773U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375519A (en) * | 2015-11-20 | 2016-03-02 | 湖南红太阳新能源科技有限公司 | Grid-connected photovoltaic power generation system and control method therefor |
| CN112051502A (en) * | 2020-09-01 | 2020-12-08 | 三门核电有限公司 | Offline action testing device of aviation plug-in circuit breaker |
| WO2022121430A1 (en) * | 2020-12-07 | 2022-06-16 | 阳光电源股份有限公司 | Medium-voltage photovoltaic grid-connection inverter system, and photovoltaic power generation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee after: SINENG ELECTRIC Co.,Ltd. Address before: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee before: Top energy Electric Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee after: Top energy Electric Co.,Ltd. Address before: 214174 No. 1 standard building, wind power road, Huishan Economic Development Zone, Huishan District, Jiangsu, Wuxi Patentee before: WUXI SINENG NEW ENERGY CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |