CN103888070A - Remote monitor type photovoltaic connecting box based on voltage detection and single-wire communication protocol - Google Patents
Remote monitor type photovoltaic connecting box based on voltage detection and single-wire communication protocol Download PDFInfo
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- CN103888070A CN103888070A CN201410134189.3A CN201410134189A CN103888070A CN 103888070 A CN103888070 A CN 103888070A CN 201410134189 A CN201410134189 A CN 201410134189A CN 103888070 A CN103888070 A CN 103888070A
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- photovoltaic
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- voltage detection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a remote monitor type photovoltaic connecting box based on voltage detection and a single-wire communication protocol. The remote monitor type photovoltaic connecting box comprises a diode string, photovoltaic cable interfaces, voltage detection circuit modules and an MCU microprocessor. The diode string comprises a plurality of diodes connected in series in the same direction, the number of the diodes is equal to that of photovoltaic cells, and the diodes and the photovoltaic cells are in one-to-one correspondence and are connected in parallel. The two photovoltaic cable interfaces are connected to the two ends of the diode string respectively. The voltage detection circuit modules are connected with the diodes in the diode string in parallel respectively, and the output ends of the voltage detection circuit modules are connected with the MCU microprocessor. The MCU microprocessor is connected with a control host outside the photovoltaic connecting box through the single-wire communication protocol. Voltage detection circuits are used for detecting voltages of the two ends of the diode string, the MCU microprocessor with the monitor function is integrated, and when the voltage detection circuits detect that the voltages of two ends of the diodes are too high, the monitored abnormal state is transmitted to the control host through the single-wire communication protocol, and real-time monitor on the temperature of the photovoltaic connecting box is achieved.
Description
Technical field
The present invention relates to field of photovoltaic power generation, relate in particular to the photovoltaic junction box being applied in photovoltaic generating system, particularly a kind of remote monitoring type photovoltaic junction box based on surveying voltage and single-wire communication agreement.
Background technology
In the electric connection technology of photovoltaic generating system, conventionally adopting photovoltaic junction box to realize photovoltaic module is the electrical connection between solar battery group and inverter.Current photovoltaic junction box arranges an installation cavity between box body, is arranged in installation cavity with the conducting strip of diode.The quantity of diode is identical with the quantity of solar cell, and with solar cell one by one correspondence be connected in parallel.The effect of diode is to utilize the principle of its forward conduction, oppositely cut-off to prevent that reverse charging from damaging solar battery group, and prevents that the solar cell from opening circuit and cause whole solar battery group all cannot use.When solar battery group all when normal, do not have electric current to flow through diode; When having a solar cell because fortuitous event is cannot normal power generation time, diode protection state starts, and has larger electric current and flows through diode.Because diode is wanted the electric current of the about 10A of conducting in when work, can cause a large amount of hot stacks, produce higher temperature, along with the continuous rising of diode temperature, resistance in diode will constantly increase, cause diode to produce more heat, enter vicious circle thereby waste more electric power resource.Therefore, in order to guarantee the reliably working of photovoltaic junction box, the temperature of diode can not be very high, and the real-time monitoring of temperature is seemed to particularly important.
Summary of the invention
For the problems referred to above of existing photovoltaic junction box, applicant, through Improvement, provides a kind of remote monitoring type photovoltaic junction box based on surveying voltage and single-wire communication agreement, realizes the real-time monitoring of photovoltaic junction box temperature.
Technical scheme of the present invention is as follows:
A kind of remote monitoring type photovoltaic junction box based on surveying voltage and single-wire communication agreement, comprise the upper cover and the base that mutually cover, between upper cover and base, form cavity, in described cavity, comprise diode string, photovoltaic cable interface, survey potential circuit module and MCU microprocessor; Described diode string comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell, and with photovoltaic cell one by one correspondence be connected in parallel; Described photovoltaic cable interface has two, is connected to respectively the two ends of diode string; Described survey potential circuit module respectively with diode string in each diodes in parallel, for detecting the voltage at each diode two ends, the output of described survey potential circuit module connects MCU microprocessor; Described MCU microprocessor connects the main control system outside photovoltaic junction box by single-wire communication agreement.
Useful technique effect of the present invention is:
The present invention uses the voltage of surveying potential circuit detection diode string two ends, and the integrated MCU microprocessor with monitoring function, in the time that survey potential circuit detects the overtension at diode two ends, the abnormality monitoring is arrived to main control system by single-wire communication protocol transmission, realized the real-time monitoring of photovoltaic junction box temperature.
Advantage of the present invention will provide in the description of embodiment part below, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, photovoltaic junction box of the present invention, by comprising diode string 1, photovoltaic cable interface 2 in the cavity forming between upper cover and base, surveying potential circuit module 3 and MCU microprocessor 4.Diode string 1 comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell 5, and with photovoltaic cell 5 one by one correspondence be connected in parallel.Two photovoltaic cable interfaces 2 are connected to respectively the two ends of diode string 1.Multiple survey potential circuit modules 3 respectively with diode string 1 in each diodes in parallel, for detecting the electric current at each diode two ends, the output of surveying potential circuit module 3 connects MCU microprocessor 4.MCU microprocessor 4 connects the output of each survey potential circuit module 3, and the output of MCU microprocessor connects the main control system 6 outside photovoltaic junction box by single-wire communication agreement.In the time that survey potential circuit module 3 detects the overtension at two ends of diode, illustrate that this diode temperature is too high, the abnormal data of acquisition is gone out to main control system 6 with single-wire communication protocol transmission by MCU microprocessor 4, realize the temperature remote real-time monitoring of photovoltaic junction box.Survey potential circuit module 3 of the present invention and MCU microprocessor 4, main control system 6 are commercial goods.Described single-wire communication agreement is prior art.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the spirit and concept in the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. the remote monitoring type photovoltaic junction box based on surveying voltage and single-wire communication agreement, comprise the upper cover and the base that mutually cover, between upper cover and base, form cavity, it is characterized in that: in described cavity, comprise diode string (1), photovoltaic cable interface (2), survey potential circuit module (3) and MCU microprocessor (4); Described diode string (1) comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell (5), and same photovoltaic cell (5) one by one correspondence be connected in parallel; Described photovoltaic cable interface (2) has two, is connected to respectively the two ends of diode string (1); Described survey potential circuit module (3) respectively with diode string (1) in each diodes in parallel, for detecting the voltage at each diode two ends, the output of described survey potential circuit module (3) connects MCU microprocessor (4); Described MCU microprocessor (4) connects the main control system (6) outside photovoltaic junction box by single-wire communication agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134189.3A CN103888070A (en) | 2014-04-03 | 2014-04-03 | Remote monitor type photovoltaic connecting box based on voltage detection and single-wire communication protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134189.3A CN103888070A (en) | 2014-04-03 | 2014-04-03 | Remote monitor type photovoltaic connecting box based on voltage detection and single-wire communication protocol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103888070A true CN103888070A (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410134189.3A Pending CN103888070A (en) | 2014-04-03 | 2014-04-03 | Remote monitor type photovoltaic connecting box based on voltage detection and single-wire communication protocol |
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| CN (1) | CN103888070A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888147A (en) * | 2016-09-30 | 2018-04-06 | 阿特斯阳光电力集团有限公司 | Photovoltaic system |
| CN107888125A (en) * | 2016-09-30 | 2018-04-06 | 阿特斯阳光电力集团有限公司 | Photovoltaic plant monitor and photovoltaic system |
| CN108418544A (en) * | 2017-02-09 | 2018-08-17 | 泰科电子(上海)有限公司 | Solar Panel Junction Box and Solar Power System |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201773167U (en) * | 2010-08-23 | 2011-03-23 | 吕纪坤 | Photovoltaic component junction box sensing and detecting device |
| CN102386258A (en) * | 2010-09-02 | 2012-03-21 | 国琏电子（上海）有限公司 | Junction box and solar system |
| CN102723394A (en) * | 2012-06-29 | 2012-10-10 | 中国农业大学 | Junction box of photovoltaic assembly |
| CN102841301A (en) * | 2012-09-27 | 2012-12-26 | 常州旭能新能源科技有限公司 | Photovoltaic assembly monitoring system |
| CN103296112A (en) * | 2012-03-05 | 2013-09-11 | 上海捷波通信科技有限公司 | Junction box and intelligent motoring system of solar battery component |
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2014
- 2014-04-03 CN CN201410134189.3A patent/CN103888070A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201773167U (en) * | 2010-08-23 | 2011-03-23 | 吕纪坤 | Photovoltaic component junction box sensing and detecting device |
| CN102386258A (en) * | 2010-09-02 | 2012-03-21 | 国琏电子（上海）有限公司 | Junction box and solar system |
| CN103296112A (en) * | 2012-03-05 | 2013-09-11 | 上海捷波通信科技有限公司 | Junction box and intelligent motoring system of solar battery component |
| CN102723394A (en) * | 2012-06-29 | 2012-10-10 | 中国农业大学 | Junction box of photovoltaic assembly |
| CN102841301A (en) * | 2012-09-27 | 2012-12-26 | 常州旭能新能源科技有限公司 | Photovoltaic assembly monitoring system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888147A (en) * | 2016-09-30 | 2018-04-06 | 阿特斯阳光电力集团有限公司 | Photovoltaic system |
| CN107888125A (en) * | 2016-09-30 | 2018-04-06 | 阿特斯阳光电力集团有限公司 | Photovoltaic plant monitor and photovoltaic system |
| CN108418544A (en) * | 2017-02-09 | 2018-08-17 | 泰科电子(上海)有限公司 | Solar Panel Junction Box and Solar Power System |
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Application publication date: 20140625 |