CN206422518U - Photovoltaic module reverse current detects protection device - Google Patents
Photovoltaic module reverse current detects protection device Download PDFInfo
- Publication number
- CN206422518U CN206422518U CN201620985407.9U CN201620985407U CN206422518U CN 206422518 U CN206422518 U CN 206422518U CN 201620985407 U CN201620985407 U CN 201620985407U CN 206422518 U CN206422518 U CN 206422518U
- Authority
- CN
- China
- Prior art keywords
- photovoltaic module
- relay
- circuit
- reverse current
- protection device
- 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
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model belongs to photovoltaic electrification component field, and the device of reverse current detection and protection is more particularly to carried out to photovoltaic module.Photovoltaic module reverse current detects protection device, and it includes photovoltaic module and inverter, and dc circuit breaker is provided between photovoltaic module and inverter, it is characterised in that：The current sensor of the positive pole section connecting detection reverse current of described photovoltaic module, current sensor is connected with sample circuit, sample circuit unit is connected with comparison circuit, the output end of comparison circuit is connected with the first relay, the normally opened electric shock of first relay is connected with the second relay, and the second relay is connected with dc circuit breaker.The utility model devises a kind of detection protection device of photovoltaic module directional current, overcomes the defect for preventing that directional current from being present using diode in the prior art.
Description
Technical field
The utility model belongs to photovoltaic electrification component field, more particularly to carries out reverse current detection and guarantor to photovoltaic module
The device of shield.
Background technology
When being reversed current through in photovoltaic module, hot spot effect can be produced, cause photovoltaic module seriously generate heat so as to
Accelerate aging.Photovoltaic module in the market typically installs counnter attack diode to have prevented in header box or DC cabinet
Reverse current flows through.But backward dioded has following shortcoming：
1st, stress levels require very high.1000V even more than 1500V are commonly reached after photovoltaic module series connection.This is required
Diode is pressure-resistant, and needs are higher.Stress levels height will cause diode to involve great expense and be easily damaged.
2nd, conduction loss requires very little.Generation that will be more or less after diode forward conducting is lost, so as to cause hair
Electrical efficiency step-down.
3rd, cooling requirements are very high.The general use environment very severe of photovoltaic products, this requires diode to pretend radiator
To ensure its good radiating.Pretend after radiator plus the increase of size and cost can be caused.
The content of the invention
In view of the shortcomings of the prior art, the utility model devises a kind of inspection of photovoltaic module directional current to the utility model
Protection device is surveyed, the defect for preventing that directional current from being present using diode in the prior art is overcome.
The utility model is achieved through the following technical solutions：
Photovoltaic module reverse current detects protection device, and it includes photovoltaic module and inverter, in photovoltaic module and inverse
Dc circuit breaker is provided between change device, it is characterised in that：The positive pole section connecting detection reverse current of described photovoltaic module
Current sensor, current sensor is connected with sample circuit, and sample circuit unit is connected with comparison circuit, the output of comparison circuit
End is connected with the first relay, and the normally opened electric shock of the first relay is connected with the second relay, the second relay and direct current interruption
Device is connected.
Described sample circuit includes the bleeder circuit being connected with current sensor, and the voltage being connected with bleeder circuit
Follow circuit.
Described comparison circuit includes a comparator, and the positive input of comparator is connected with reference voltage, comparator
Reverse input section and the output end of sample circuit connect, the output end of comparator is connected with the first relay.
In summary, the utility model has the advantages that：
The utility model is controlled by the circuit of current sensor and correlation, has saved space and cost, and this
Circuit described in utility model does not have strong voltage and heavy current, and crash rate is low, and circuit described in the utility model is independent in addition
Operation control, accessing photovoltaic, you become system, and loss is small, does not interfere with conversion efficiency.
Brief description of the drawings
Fig. 1 is composition schematic diagram of the present utility model；
1 is bleeder circuit in figure, and 2 be voltage on the basis of voltage follower circuit, 3, and 4 be comparator, and 5 be the first relay, 6
Got an electric shock to be normally opened, 7 be the second relay, and 8 be dc circuit breaker, and 9 be inverter, and 10 be current sensor, and 11 be photovoltaic module.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
As shown in figure 1, photovoltaic module reverse current detects protection device, it includes photovoltaic module 11 and inverter 9, just
In the case of often, photovoltaic module is connected with inverter, and photovoltaic module output current is to inverter, in photovoltaic module 11 and inverter 9
Between be provided with dc circuit breaker 8, the current sensor 10 of the positive pole section connecting detection reverse current of described photovoltaic module 11,
Current sensor 10 is connected with sample circuit, and sample circuit unit is connected with comparison circuit, and the output end of comparison circuit is connected with
First relay 5, the normally opened electric shock 6 of the first relay 5 is connected with the second relay 7, the second relay 7 and dc circuit breaker 8
Connection.
Described sample circuit includes the bleeder circuit 1 being connected with current sensor, and the electricity being connected with bleeder circuit 1
Pressure follows circuit 2.
Described comparison circuit includes a comparator 4, and the positive input of comparator 4 is connected with reference voltage 3, compared
The reverse input section of device 4 and the output end of sample circuit are connected, and the output end of comparator 4 is connected with the first relay 5.
The course of work of the present utility model：
When inverter has current direction photovoltaic module, the output access sample circuit of current sensor, sample circuit enters
After row partial pressure and isolation external disturbance processing, output voltage to comparison circuit, comparison circuit by the output voltage of sample circuit with
Reference voltage is compared, comparison circuit output low level, and now the first relay obtains electric, and the normally opened electric shock of the first relay is closed
Close, the second relay obtains electric, and regulating relay disconnects dc circuit breaker, so that avoiding inverter from exporting reverse current gives photovoltaic group
Part, realizes the purpose of protection photovoltaic module.
In summary, the utility model has the advantages that：
The utility model is controlled by the circuit of current sensor and correlation, has saved space and cost, and this
Circuit described in utility model does not have strong voltage and heavy current, and crash rate is low, and circuit described in the utility model is independent in addition
Operation control, accessing photovoltaic, you become system, and loss is small, does not interfere with conversion efficiency.
Claims (3)
1. photovoltaic module reverse current detects protection device, it includes photovoltaic module and inverter, in photovoltaic module and inversion
Dc circuit breaker is provided between device, it is characterised in that：The electricity of the positive pole section connecting detection reverse current of described photovoltaic module
Flow sensor, current sensor is connected with sample circuit, and sample circuit unit is connected with comparison circuit, the output end of comparison circuit
The first relay is connected with, the normally opened electric shock of the first relay is connected with the second relay, the second relay and dc circuit breaker
Connection.
2. photovoltaic module reverse current according to claim 1 detects protection device, it is characterised in that：Described sampling electricity
Road includes the bleeder circuit being connected with current sensor, and the voltage follower circuit being connected with bleeder circuit.
3. photovoltaic module reverse current according to claim 1 detects protection device, it is characterised in that：Described comparison is electric
Road includes a comparator, and the positive input of comparator is connected with reference voltage, reverse input section and the sampling electricity of comparator
The output end connection on road, the output end of comparator is connected with the first relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620985407.9U CN206422518U (en) | 2016-08-30 | 2016-08-30 | Photovoltaic module reverse current detects protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620985407.9U CN206422518U (en) | 2016-08-30 | 2016-08-30 | Photovoltaic module reverse current detects protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206422518U true CN206422518U (en) | 2017-08-18 |
Family
ID=59578615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620985407.9U Expired - Fee Related CN206422518U (en) | 2016-08-30 | 2016-08-30 | Photovoltaic module reverse current detects protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206422518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947736A (en) * | 2017-12-28 | 2018-04-20 | 扬州华鼎电器有限公司 | A kind of photovoltaic generation elastic controller and its control method |
-
2016
- 2016-08-30 CN CN201620985407.9U patent/CN206422518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947736A (en) * | 2017-12-28 | 2018-04-20 | 扬州华鼎电器有限公司 | A kind of photovoltaic generation elastic controller and its control method |
| CN107947736B (en) * | 2017-12-28 | 2023-08-25 | 扬州华鼎电器有限公司 | Photovoltaic power generation elastic control device and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6843972B2 (en) | Charging pile | |
| CN202872614U (en) | High-power water cooling current transformer | |
| CN206422518U (en) | Photovoltaic module reverse current detects protection device | |
| CN107425811B (en) | The monitoring device and photovoltaic generating system of photovoltaic module | |
| CN105299800B (en) | New energy air-conditioning | |
| CN204651972U (en) | A kind of ventilation and heat structure of outdoor direct charger | |
| CN206302159U (en) | A kind of water-cooled high-voltage dynamic reactive compensation device power cell | |
| CN105159388B (en) | A kind of method of the MPPT maximum power point tracking in photovoltaic microgrid system | |
| CN202652082U (en) | Large power solar energy three-phase grid connected inverter | |
| CN208101748U (en) | New-energy automobile five in one controller counnter attack connection device | |
| CN202866973U (en) | Automobile electronic fan control circuit and vehicle | |
| CN204030982U (en) | A kind of (PCC) power | |
| CN102723878A (en) | High-power solar three-phase grid-connected inverter | |
| CN205070759U (en) | Three level power modules on NPP structure based on crimping formula switch tube | |
| CN205829150U (en) | Photovoltaic DC-to-AC converter earth protective device | |
| CN206272110U (en) | A kind of heat loss through convection structure-improved of open frame circuit breaker | |
| CN201608451U (en) | Fixed contact cover for withdrawable metal-enclosed switchgear | |
| CN103647504B (en) | Solar cell earthing device and method | |
| CN205488154U (en) | Anti PID solar energy component of high voltage overlength | |
| CN203645557U (en) | Modular power assembly structure of solar photovoltaic inverter | |
| CN208207142U (en) | A kind of power cycle pilot system of 3000A semiconductor devices | |
| CN206211336U (en) | A kind of photovoltaic generation confluxes inversion distribution box | |
| CN202077329U (en) | Air cooling system of control cabinet and variable frequency control cabinet comprising same | |
| CN202120953U (en) | Photovoltaic cell connecting device | |
| CN206349742U (en) | A kind of header box protection device |
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: 20170818 Termination date: 20180830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |