CN202004430U - Earth leakage protection device of grid-connected photovoltaic inverter - Google Patents
Earth leakage protection device of grid-connected photovoltaic inverter Download PDFInfo
- Publication number
- CN202004430U CN202004430U CN201120091626XU CN201120091626U CN202004430U CN 202004430 U CN202004430 U CN 202004430U CN 201120091626X U CN201120091626X U CN 201120091626XU CN 201120091626 U CN201120091626 U CN 201120091626U CN 202004430 U CN202004430 U CN 202004430U
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- winding
- earth leakage
- combining inverter
- photovoltaic combining
- protection device
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- Protection Of Static Devices (AREA)
- Inverter Devices (AREA)
Abstract
The utility model relates to the field of photoelectricity, in particular to an earth leakage protection device of a grid-connected photovoltaic inverter, which comprises a winding L, a winding N and a winding Ls. Compared with the prior art, current difference between a fire line and a zero line is monitored by adopting an induction coil, so that the earth leakage protection device has a more compact structure, faster response speed and more convenience in installation while realizing the protection on the circuit.
Description
Technical field
The utility model relates to photoelectric field, specifically a kind of earth leakage protective device of photovoltaic combining inverter.
Background technology
As pollution-free, reproducible new forms of energy, solar energy more and more obtains people's attention and application.Solar power generation has become one of main means of human use's solar energy.Photovoltaic combining inverter when local electrical network or AC load power supply, except the requirement of satisfying the quality of power supply, also should possess various defencive functions, to guarantee safe, reliable, the continuous service of photovoltaic plant as the core of photovoltaic plant.
Along with the development of parallel network power generation technology, people are more and more higher to the requirement of combining inverter security performance.Therefore, a kind of to provide protective circuit under the situation of apparatus insulated inefficacy be vital in design.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of earth leakage protective device of photovoltaic combining inverter is provided.
In order to achieve the above object, the utility model comprises winding L, winding N and winding L s, it is characterized in that: the live wire of photovoltaic combining inverter output connects the zero line connection winding N of winding L, photovoltaic combining inverter output, the two ends of winding L s are connected to the photovoltaic combining inverter circuit by node IN1, node IN2 respectively.
Described winding L is a power coil.
Described winding N is a power coil.
Described winding L s is an induction coil.
The utility model is compared with prior art, adopts the difference between current of induction coil monitoring live wire and zero line, makes earth leakage protective device when realizing protective circuit, and structure is also compacter, and response speed is also faster, installs also more convenient.
Description of drawings
Fig. 1 is a detection of electrical leakage module diagram of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
Now in conjunction with the accompanying drawings the utility model is described further.
Referring to Fig. 1 and Fig. 2, the utility model comprises winding L, winding N and winding L s, it is characterized in that: the live wire of photovoltaic combining inverter output connects the zero line connection winding N of winding L, photovoltaic combining inverter output, the two ends of winding L s are connected to the photovoltaic combining inverter circuit by node IN1, node IN2 respectively.
Winding L, winding N are power coil, and winding L s is an induction coil.
Under normal circumstances, the size of current of the output end power line live wire of photovoltaic combining inverter and zero line equates.But, the electric leakage accident takes place owing to existing safety electric capacity or dielectric strength to weaken in the circuit, cause the size of current of live wire and zero line not wait.
The utility model is when work, and winding L s is an induction coil, can monitor the difference between current of winding L, winding N, is sent to single-chip microcomputer or DSP by peripheral modulate circuit and with this signal again.If the Ground leakage current greater than 300mA appears in the signal that single-chip microcomputer or DSP monitor, then in the 0.3s of regulation, disconnect being connected and pointing out fault message of electrical network and photovoltaic DC-to-AC converter; If leakage current when sudden change of 30mA, 60mA, 150m appears in the signal that single-chip microcomputer or DSP monitor, then in the 0.3s of regulation, disconnect being connected and pointing out fault message of electrical network and photovoltaic DC-to-AC converter, to prevent fatal electric shock., the utility model all self check moves once, and is working properly to guarantee observation circuit.
Claims (4)
1. the earth leakage protective device of a photovoltaic combining inverter; comprise winding L, winding N and winding L s, it is characterized in that: the live wire of photovoltaic combining inverter output connects the zero line connection winding N of winding L, photovoltaic combining inverter output, the two ends of winding L s are connected to the photovoltaic combining inverter circuit by node IN1, node IN2 respectively.
2. the earth leakage protective device of a kind of photovoltaic combining inverter according to claim 1, it is characterized in that: described winding L is a power coil.
3. the earth leakage protective device of a kind of photovoltaic combining inverter according to claim 1, it is characterized in that: described winding N is a power coil.
4. the earth leakage protective device of a kind of photovoltaic combining inverter according to claim 1, it is characterized in that: described winding L s is an induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120091626XU CN202004430U (en) | 2011-03-31 | 2011-03-31 | Earth leakage protection device of grid-connected photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120091626XU CN202004430U (en) | 2011-03-31 | 2011-03-31 | Earth leakage protection device of grid-connected photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004430U true CN202004430U (en) | 2011-10-05 |
Family
ID=44707157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120091626XU Expired - Fee Related CN202004430U (en) | 2011-03-31 | 2011-03-31 | Earth leakage protection device of grid-connected photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675396A (en) * | 2012-09-13 | 2014-03-26 | 武汉金天新能源科技有限公司 | Leak current detector for photovoltaic inverter |
| CN104133099A (en) * | 2014-07-07 | 2014-11-05 | 中国电子科技集团公司第四十一研究所 | Detection device and method for residual current of photovoltaic array |
-
2011
- 2011-03-31 CN CN201120091626XU patent/CN202004430U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675396A (en) * | 2012-09-13 | 2014-03-26 | 武汉金天新能源科技有限公司 | Leak current detector for photovoltaic inverter |
| CN104133099A (en) * | 2014-07-07 | 2014-11-05 | 中国电子科技集团公司第四十一研究所 | Detection device and method for residual current of photovoltaic array |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20140331 |