CN204203348U - A kind of photovoltaic combiner box transformation current sensing means - Google Patents
A kind of photovoltaic combiner box transformation current sensing means Download PDFInfo
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- CN204203348U CN204203348U CN201420577759.1U CN201420577759U CN204203348U CN 204203348 U CN204203348 U CN 204203348U CN 201420577759 U CN201420577759 U CN 201420577759U CN 204203348 U CN204203348 U CN 204203348U
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- combiner box
- photovoltaic combiner
- machine
- sensing means
- current
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Abstract
Needing to carry out intellectualized reconstruction in view of there is a large amount of non intelligent header box at present, the utility model proposes a kind of photovoltaic combiner box transformation current sensing means, by increasing this device at original non intelligent header box, realizing the current detecting to each incoming line.Photovoltaic combiner box transformation current sensing means, by individual host and multiple slave machine.Consistent according to the photovoltaic combiner box incoming line quantity of required transformation from machine quantity.Be be connected in series the incoming line of photovoltaic combiner box from the mounting means of machine.Measure DC current from machine, and surveyed DC current values is passed out to main frame by 4-20mA electric current loop communication modes.Main frame receives the data sent through 4-20mA electric current communication modes from machine, and will receive from machine data arrange after be sent to host computer through wireless communication interface or wired communication interface.
Description
Technical field
The utility model relates to photovoltaic generation application, is a kind of photovoltaic combiner box transformation current sensing means.
Background technology
Photovoltaic generation enters Rapid development stage, has built a large amount of photo-voltaic power generation station, and the construction scale of photo-voltaic power generation station is also in continuous increase.Large-sized photovoltaic power house due to floor area large, photovoltaic array is numerous, brings inconvenience to the operation management in power station.In order to reduce large-sized photovoltaic power station operation management workload, the construction of photovoltaic plant starts to adopt intelligent equipment.Intelligent photovoltaic combiner box can measure the working current of each photovoltaic group string, is conducive to finding fault group string early, is therefore widely used in new photovoltaic plant construction project.But also there is a large amount of early stage photovoltaic plant built at present, use non intelligent header box, need to promote intelligent level by intellectualized reconstruction, therefore propose a kind of current sensing means, for the transformation to non intelligent header box.
Summary of the invention
Needing to carry out intellectualized reconstruction in view of there is a large amount of non intelligent header box at present, the utility model proposes a kind of photovoltaic combiner box transformation current sensing means, by increasing this device at original non intelligent header box, realizing the current detecting to each incoming line.
The concrete technical scheme of current sensing means described in the utility model is as follows:
Photovoltaic combiner box transformation current sensing means, by individual host and multiple slave machine.Consistent according to the photovoltaic combiner box incoming line quantity of required transformation from machine quantity.Be be connected in series the incoming line of photovoltaic combiner box from the mounting means of machine.Measure DC current from machine, and surveyed DC current values is passed out to main frame by 4-20mA electric current loop communication modes.Main frame receives the data sent through 4-20mA electric current communication modes from machine, and will receive from machine data arrange after be sent to host computer through wireless communication interface or wired communication interface.The host power supply of photovoltaic combiner box transformation current sensing means, from the positive and negative bus-bar power taking of header box, is provided from electromechanical source by main frame.This current sensing means adopts input wires terminal from the tested current input terminal of machine, and output terminal adopts aciculiform crimping termination, can fast-wiring.
Accompanying drawing explanation
Accompanying drawing 1 is photovoltaic combiner box transformation current sensing means structural drawing;
Accompanying drawing 2 is photovoltaic combiner box transformation current sensing means host structure chart;
Accompanying drawing 3 is that photovoltaic combiner box transformation current sensing means is from machine structural drawing.
In accompanying drawing 1
1. main frame;
2. main frame with from machine connecting line;
3. from machine.
In accompanying drawing 2:
1. become and send current input circuit;
2. signal processing module;
3. wire communication interface;
4. wireless communication interface;
5. main frame.
In accompanying drawing 3:
1. input wires terminal;
2. sample resistance;
3. export aciculiform crimping termination;
4. Differential input circuit;
5.AD circuit;
6.DA circuit;
7. become and send current output circuit;
8. from machine;
9. photovoltaic group string input line;
10. header box input terminal.
Embodiment
Photovoltaic combiner box transformation current sensing means is divided into main frame and from machine two parts from structure, as shown in Figure 1, main frame (1) relies on circuit (2) to be connected with between machine (3), connection line (2) is four lines, 12V power ground respectively, 12V power lead, 4-20mA becomes power transmission streamline, and 4-20mA becomes power transmission stream ground wire.Consistent with by the input group string number of transforming header box from machine (3) quantity.
Photovoltaic combiner box transformation uses current sensing means main machine structure as shown in Figure 2, and main frame (5) send current input circuit (1), signal transacting (2), wire communication interface (3), wireless communication interface (4) to form by change.Become and send current input circuit (1) to receive input 4-20mA change power transmission stream, this current signal is converted to digital signal, send into signal transacting (2), after signal transacting (2) computing, be sent to host computer by wire communication interface (3) or wireless communication interface (4).Wire communication interface (3) adopts RS485 interface circuit.Wireless communication interface (4) adopts 433Mhz radio transmitter.
Photovoltaic combiner box transformation current sensing means from machine structure as shown in Figure 3, is crimped termination (3), Differential input circuit (4), AD circuit (5), DA circuit (6) from machine (8) by input wires terminal (1), sample resistance (2), output aciculiform, is become and send current output circuit (7) to form.When transforming non intelligent photovoltaic combiner box, photovoltaic group string input line (9) is taken out from header box input terminal (10), change photovoltaic group string input line (9) access input wires terminal (1) into, export aciculiform crimping termination (3) access header box input terminal (10).Input wires terminal (1) is connected to sample resistance (2) two ends with output aciculiform line ball termination (3), the electric current entering header box from photovoltaic group string flows through sample resistance (2), sample resistance (2) forms pressure drop, this voltage drop value is obtained by Differential input circuit (4), digital signal is converted to through AD circuit (5), this digital signal is converted to analog voltage signal through DA circuit (6), and this analog voltage signal send current output circuit (7) to be converted to 4-20mA change power transmission stream through becoming.
Claims (6)
1.
a kind of photovoltaic combiner box transformation current sensing means, by individual host and multiple slave machine, is characterized in that: after this device is arranged on photovoltaic combiner box; Host power supply is direct current supply, positive source access photovoltaic combiner box positive bus, power cathode access photovoltaic combiner box negative bus-bar; Be connected in series the incoming line of photovoltaic combiner box from machine.
2.
photovoltaic combiner box transformation current sensing means according to claims 1, is characterized in that: measure DC current from machine, and surveyed DC current values sent by 4-20mA electric current loop communication modes.
3.
photovoltaic combiner box transformation current sensing means according to claims 1, is characterized in that: main frame has wireless communication interface and wired communication interface.
4.
photovoltaic combiner box transformation current sensing means according to claims 1, is characterized in that: main frame receives the data sent through 4-20mA change power transmission stream communication modes from machine.
5.
photovoltaic combiner box transformation current sensing means according to claims 1, is characterized in that: provided from the power supply of machine by main frame.
6.
photovoltaic combiner box transformation current sensing means according to claims 1, is characterized in that: adopt aciculiform crimping termination from machine testing current output terminal, detect current input terminal and adopt input wires terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420577759.1U CN204203348U (en) | 2014-10-09 | 2014-10-09 | A kind of photovoltaic combiner box transformation current sensing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420577759.1U CN204203348U (en) | 2014-10-09 | 2014-10-09 | A kind of photovoltaic combiner box transformation current sensing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204203348U true CN204203348U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420577759.1U Active CN204203348U (en) | 2014-10-09 | 2014-10-09 | A kind of photovoltaic combiner box transformation current sensing means |
Country Status (1)
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| CN (1) | CN204203348U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246495A (en) * | 2016-08-26 | 2016-12-21 | 深圳市英威腾电气股份有限公司 | A kind of photovoltaic water-raising system and control method thereof |
| CN108880599A (en) * | 2018-08-01 | 2018-11-23 | 珠海格力电器股份有限公司 | Communicating circuit and its means of communication, controller and electrical equipment |
| CN112860514A (en) * | 2021-02-01 | 2021-05-28 | 深圳市科陆精密仪器有限公司 | Method, system and storage medium for identifying slave machine by host machine based on 4-20mA current loop |
-
2014
- 2014-10-09 CN CN201420577759.1U patent/CN204203348U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246495A (en) * | 2016-08-26 | 2016-12-21 | 深圳市英威腾电气股份有限公司 | A kind of photovoltaic water-raising system and control method thereof |
| CN106246495B (en) * | 2016-08-26 | 2019-01-25 | 深圳市英威腾电气股份有限公司 | A kind of photovoltaic water-raising system and its control method |
| CN108880599A (en) * | 2018-08-01 | 2018-11-23 | 珠海格力电器股份有限公司 | Communicating circuit and its means of communication, controller and electrical equipment |
| CN108880599B (en) * | 2018-08-01 | 2023-10-27 | 珠海格力电器股份有限公司 | Communication circuit, communication method thereof, controller and electric equipment |
| CN112860514A (en) * | 2021-02-01 | 2021-05-28 | 深圳市科陆精密仪器有限公司 | Method, system and storage medium for identifying slave machine by host machine based on 4-20mA current loop |
| CN112860514B (en) * | 2021-02-01 | 2022-08-16 | 深圳市科陆精密仪器有限公司 | Method, system and storage medium for identifying slave machine by host machine based on 4-20mA current loop |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |