CN203774784U - Bus anti-reversed wiring protection circuit of photovoltaic inverter - Google Patents
Bus anti-reversed wiring protection circuit of photovoltaic inverter Download PDFInfo
- Publication number
- CN203774784U CN203774784U CN201420194498.5U CN201420194498U CN203774784U CN 203774784 U CN203774784 U CN 203774784U CN 201420194498 U CN201420194498 U CN 201420194498U CN 203774784 U CN203774784 U CN 203774784U
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- circuit
- photovoltaic
- central cpu
- inverter
- circuit breaker
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- Protection Of Static Devices (AREA)
Abstract
The utility model relates to a bus anti-reversed wiring protection circuit of a photovoltaic inverter. The protection circuit is composed of a direct-current circuit breaker, a central CPU, a detection sampling circuit, a comparator circuit and a driving circuit. The direct-current circuit breaker is connected with an output wiring bar of a photovoltaic battery; the detection sampling circuit is connected to the output wiring bar of the photovoltaic battery; the detection sampling circuit is connected with the comparator circuit that is connected with the central CPU; the central CPU is connected with the direct-current circuit breaker by the driving circuit. In the anti-reversed wiring circuit, under the circumstances that the bus cable is connected reversely, the direct-current circuit breaker of the whole machine is released and can not be closed; data are uploaded to a human-computer interface to display reversed wiring alarm information, so that the inverter can warn the maintenance personnel and thus severe accidents like over current, short circuit and even inverter damage due to reversed wiring of the power cable can be avoided. Therefore, the comprehensive and secure guarantee can be provided for the protection performance of the inverter.
Description
Technical field
The utility model relates to field of photovoltaic power generation, is specifically related to a kind of photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit that is applied to high pressure photovoltaic grid-connected inverting system and carries out both positive and negative polarity detection.
Background technology
In recent years, the research of China's photovoltaic combining inverter and application had obtained development fast, during due to inversion system construction and installing engineering electrical power wiring, connect inverse time when there is electric power of equipment wiring polarity, inverter can cause overcurrent, short circuit, inner former device failure.Therefore, detect exactly the both positive and negative polarity wiring of photovoltaic combining inverter high-voltage electric system, the safety of the normal operation to safeguards system and personnel, equipment, significant.
At present, general photovoltaic DC-to-AC converter is anti-reverse all to be detected overcurrent by circuit breaker overcurrent and implements to disconnect, if it is excessive to connect anti-transient current, breaker contact point also likely causes welding ablation, causes the potential safety hazards such as bus bar copper row heating is on fire.
Summary of the invention
For above-mentioned reasons, the utility model provides the photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit that a kind of both positive and negative polarity detects.
For achieving the above object; the utility model adopts a kind of photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit; comprise DC circuit breaker, central cpu, detection sample circuit, comparator circuit and drive circuit; DC circuit breaker is connected with the output connection row of photovoltaic cell; detection sample circuit is connected on the output connection row of photovoltaic cell; detect sample circuit and be connected with comparator circuit, comparator circuit is connected with central cpu, and central cpu is connected with DC circuit breaker by drive circuit.
Photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit also comprises man-machine interface CPU, and man-machine interface CPU communicates with one another and is connected with central cpu.
The utility model is further set to be provided with between described comparator circuit and central cpu isolation photoelectrical coupler, the output of comparator circuit is connected with the input of isolation photoelectrical coupler, and the isolation output of photoelectrical coupler and the input of central cpu are connected.
The beneficial effects of the utility model are: reverse-connection preventing circuit is in the time of the first dress of photovoltaic DC-to-AC converter or Installation and Debugging; connect anti-in the situation that at bus cable; complete machine input direct-current circuit breaker tripping closure is not gone up; show and connect and countercharge police by uploading data to man-machine interface simultaneously; make inverter can warn installation and maintenance personnel; avoid because electric power cable connects the anti-overcurrent causing, short circuit, even damages the serious accident of inverter; for inverter protective value provides more comprehensively, safer guarantee, be particularly suitable for 30-100KW photovoltaic grid-connected inverting system.
Brief description of the drawings
Fig. 1 is the connection diagram of the utility model specific embodiment.
Embodiment
As shown in Figure 1, a kind of photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit of specific embodiment of the utility model, comprise DC circuit breaker 2, central cpu 3, detect sample circuit 4, comparator circuit 5, drive circuit 6, isolation photoelectrical coupler 7 and man-machine interface CPU8, DC circuit breaker 2 is connected with the output connection row 11 of photovoltaic cell 1, detection sample circuit 4 is connected on the output connection row 11 of photovoltaic cell 1, detecting sample circuit 4 is connected with comparator circuit 5, the output of comparator circuit 5 is connected with the input of isolation photoelectrical coupler 7, the output of isolation photoelectrical coupler 7 is connected with the input of central cpu 3, man-machine interface CPU8 communicates with one another and is connected with central cpu 3, central cpu 3 is connected with DC circuit breaker 2 by drive circuit 6, control the break-make of DC circuit breaker 2.
The detection sample circuit 4 of reverse connection prevention protection circuit and the line bank 11 of photovoltaic cell 1 are connected and detect the output voltage signal of line bank 11, in the time of inverter bus cable reverse polarity connection, the voltage signal detecting by detection sample circuit 4 is lower than comparator threshold values, comparator circuit 5 is exported reverse signal, be sent to system central cpu 3 by isolation photoelectrical coupler 7, central cpu 3 is exported shutdown command and is driven DC circuit breaker 2 tripping coils by drive circuit 6, DC circuit breaker 2 is disconnected, on the other hand, central cpu 3 is uploaded to man-machine interface CPU8 by communicating circuit, in man-machine interface, demonstrating both positive and negative polarity bus connects and countercharges police.Until the wiring of bus cable polarity is correct, fault disappears, DC circuit breaker 2 handles stamp rear just can be closed, thereby effectively protected inverter.
Claims (3)
1. a photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit; it is characterized in that: described photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit comprises DC circuit breaker, central cpu, detection sample circuit, comparator circuit and drive circuit; DC circuit breaker is connected with the output connection row of photovoltaic cell; detection sample circuit is connected on the output connection row of photovoltaic cell; detecting sample circuit is connected with comparator circuit; comparator circuit is connected with central cpu, and central cpu is connected with DC circuit breaker by drive circuit.
2. photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit according to claim 1, is characterized in that: photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit also comprises man-machine interface CPU, and man-machine interface CPU communicates with one another and is connected with central cpu.
3. photovoltaic DC-to-AC converter bus reverse connection prevention protection circuit according to claim 1 and 2; it is characterized in that: between described comparator circuit and central cpu, be provided with isolation photoelectrical coupler; the output of comparator circuit is connected with the input of isolation photoelectrical coupler, and the isolation output of photoelectrical coupler and the input of central cpu are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194498.5U CN203774784U (en) | 2014-04-09 | 2014-04-09 | Bus anti-reversed wiring protection circuit of photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194498.5U CN203774784U (en) | 2014-04-09 | 2014-04-09 | Bus anti-reversed wiring protection circuit of photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203774784U true CN203774784U (en) | 2014-08-13 |
Family
ID=51291935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420194498.5U Expired - Fee Related CN203774784U (en) | 2014-04-09 | 2014-04-09 | Bus anti-reversed wiring protection circuit of photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203774784U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466918A (en) * | 2014-11-21 | 2015-03-25 | 新疆希望电子有限公司 | Energy storage battery polarity reverse connection protective circuit and recognition method thereof |
| CN105429115A (en) * | 2015-12-14 | 2016-03-23 | 深圳威能技术有限公司 | Photovoltaic power generation system, photovoltaic direct current cable protection device and control method thereof |
| CN105790248A (en) * | 2016-05-16 | 2016-07-20 | 阿克苏舒奇蒙光伏发电有限公司 | Photovoltaic microgrid anti-reverse connection circuit |
| CN107132448A (en) * | 2017-03-16 | 2017-09-05 | 珠海格力电器股份有限公司 | Recognition methods, device and system and the storage medium and processor of power supply wiring |
-
2014
- 2014-04-09 CN CN201420194498.5U patent/CN203774784U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466918A (en) * | 2014-11-21 | 2015-03-25 | 新疆希望电子有限公司 | Energy storage battery polarity reverse connection protective circuit and recognition method thereof |
| CN104466918B (en) * | 2014-11-21 | 2017-06-30 | 新疆希望电子有限公司 | A kind of energy-storage battery reverse polarity protection circuit and recognition methods |
| CN105429115A (en) * | 2015-12-14 | 2016-03-23 | 深圳威能技术有限公司 | Photovoltaic power generation system, photovoltaic direct current cable protection device and control method thereof |
| CN105790248A (en) * | 2016-05-16 | 2016-07-20 | 阿克苏舒奇蒙光伏发电有限公司 | Photovoltaic microgrid anti-reverse connection circuit |
| CN105790248B (en) * | 2016-05-16 | 2019-08-13 | 阿克苏舒奇蒙光伏发电有限公司 | The micro- electric reverse-connection preventing circuit of photovoltaic |
| CN107132448A (en) * | 2017-03-16 | 2017-09-05 | 珠海格力电器股份有限公司 | Recognition methods, device and system and the storage medium and processor of power supply wiring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20190409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |