CN104579157A - Photovoltaic convergence box with lightning protection failure early warning function - Google Patents
Photovoltaic convergence box with lightning protection failure early warning function Download PDFInfo
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- CN104579157A CN104579157A CN201510021915.5A CN201510021915A CN104579157A CN 104579157 A CN104579157 A CN 104579157A CN 201510021915 A CN201510021915 A CN 201510021915A CN 104579157 A CN104579157 A CN 104579157A
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- lightning protection
- early warning
- leakage current
- input
- current sensor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
Abstract
The invention discloses a photovoltaic convergence box with a lightning protection failure early warning function. The photovoltaic convergence box with the lightning protection failure early warning function comprises a box body, a primary loop arranged inside the box body and a secondary loop used for detecting and early warning a lightning protection failure. The secondary loop is provided with a leakage current sensor. The leakage current sensor is used for monitoring the intensity of a leakage current in a lightning protection ground loop, and is capable of judging whether malfunctions occur in a lightning arrester. An early warning signal is sent out by the leakage current sensor before severe malfunctions occur in the lightning arrester. The leakage current sensor is arranged in the lightning protection ground loop. According to the photovoltaic convergence box, an early warning can be sent out in advance before the lightning arrester starts to fail and during the performance starts to lower. Therefore, the severe accidents such as the fire breakout and the explosion caused by the malfunctions and the failure of the lightning arrester are avoided, and the safety of the convergence box and associated equipment is guaranteed.
Description
Technical field
The invention belongs to photovoltaic art, especially photovoltaic combiner box, be specifically related to a kind of photovoltaic combiner box with lightning protection early warning failure function.
Background technology
In recent years, photovoltaic generation industry, as the complete free of contamination cleaning new energy supply form of one, achieved vigorous growth.The installed capacity of photovoltaic plant is risen year by year, and only the first three quarters in 2014 increases grid connection capacity newly and reached nearly 4GW.
The development of photovoltaic generation industry, the photovoltaic combiner box consumption as photovoltaic plant important component part also sharply increases, and calculates according to standard 16 road photovoltaic combiner box, and often newly-increased 1GW photovoltaic installed capacity needs to use about 1.4 ten thousand photovoltaic combiner boxes.
Along with header box puts into operation the sharp increase of quantity, more and more stricter requirement is proposed to the security of photovoltaic combiner box.And lightning protection device (also known as Surge Protector) is an important guarantee of photovoltaic combiner box security, the harm that photovoltaic combiner box and relevant device thereof produce from the superpotential that a variety of causes such as thunderbolt cause when it normally works, effectively can be protected.Therefore whether lightning protection device normally works and directly has influence on the security of photovoltaic combiner box, and then has influence on security and the economy of whole photovoltaic plant; Whether the duty of lightning protection device normally becomes the problem that photovoltaic plant network operator needs to pay close attention to.
Although now conventional photovoltaic combiner box also can send alerting signal, the lightning protection device condition monitoring that present photovoltaic combiner box product provides only can send alerting signal for following two kinds of situations:
1. lightning protection device suffers one or many be struck by lightning and scrap; 2. cause lightning-protection module to come off and cisco unity malfunction owing to assembling the artificial origins such as bad, maloperation.
There is significant limitation in this monitoring, and only can provide signal after lightning protection device fault, can not play forewarning function, cannot avoid losing efficacy the loss caused because of lightning protection device.
Due to photovoltaic combiner box work under bad environment, and lightning protection device itself has certain life-span, and some installs good, is struck by lightning, and outward appearance seems normal lightning protection device may also can fault or aging and lost efficacy gradually.Leakage current over the ground can be produced gradually in operational process, if processed not in time, electric leakage meeting and seriously and more and more large along with fault, milliampere level is increased to gradually from the scope allowed, even tens amperes of sizes, if now not timely process probably can cause the situations such as lightning protection device is on fire, blast.Have influence on the trouble free service of header box, and then have influence on the safety of the equipment such as assembly, circuit, inverter in this loop, header box place, affect the generating efficiency of photovoltaic plant.
Therefore, a kind of photovoltaic combiner box with lightning protection early warning failure function is needed in present photovoltaic generation industry.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of effective photovoltaic combiner box failure state of lightning protection device being carried out to early warning.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of photovoltaic combiner box with lightning protection early warning failure function, it comprises casing and is arranged on the primary circuit of described box house and the secondary circuit for lightning protection failure detection and early warning, one is provided with for monitoring leakage current in lightning protection loop and the leakage current sensor of lightning protection device whether fault can being judged in described secondary circuit, described electricity leakage sensor sent early warning signal before catastrophic failure appears in described lightning protection device, and described leakage current sensor is arranged in described lightning protection loop.
Preferably, Intelligent Measurement module is also provided with in described secondary circuit, described Intelligent Measurement module is connected with described leakage current sensor, described leakage current sensor by output switch parameter to described Intelligent Measurement module or by analog output in described Intelligent Measurement module.
Preferably, described early warning signal is directly sent by described leakage current sensor, or described early warning signal is sent by described Intelligent Measurement module.
Preferably, the mode that described early warning signal exports comprise following one or several: communication output, output switch parameter, analog output.
Preferably, the kind of described early warning signal comprise following one or more: voltage signal, current signal, voice signal, light signal, on-off model.
Preferably, described primary circuit comprises input circuit and output loop, and described primary circuit and secondary circuit intersect and comprise lightning protection loop, are provided with intelligent detecting loop in described secondary circuit.
Preferably, described input circuit comprises two sub-input circuits, one of them sub-input circuit comprise connect successively positive pole input, positive electrode bus and isolating switch; The sub-input circuit of another one comprise connect successively negative pole input, negative electrode bus and described isolating switch; Described positive pole input is connected in the positive pole group string input of header box outside, and described negative pole input is connected to the negative pole group string input of header box outside; Described two sub-input circuits conflux to export by described isolating switch set and form described output loop.
Preferably, described lightning protection loop is draw a ground wire on the earth point in case from the earth terminal of described lightning protection device, and described leakage current sensor detects the electric current on described ground wire.
The invention has the beneficial effects as follows:
One, header box of the present invention before lightning protection device lost efficacy, when performance starts to reduce, can send early warning in advance, avoid because of major accidents such as its fault, on fire, the blasts that causes of losing efficacy, thus ensure that the safety of header box and relevant device thereof.
Two, photovoltaic combiner box of the present invention is with lightning protection early warning failure function, and its structure is changed little relative to traditional photovoltaic combiner box, and relative cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in embodiment of the present invention technology, be briefly described to the accompanying drawing used required in the description of embodiment technology below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the principle schematic of the embodiment of the present invention 1.
Fig. 2 is the principle schematic in the embodiment of the present invention 2.
1-primary circuit, 2-secondary circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in fig. 1, a kind of photovoltaic combiner box with lightning protection early warning failure function has been opened in the present embodiment, it comprises casing and is arranged on the primary circuit 1 of above-mentioned box house and the secondary circuit 2 for lightning protection failure detection and early warning, one is provided with for monitoring leakage current in lightning protection loop and the leakage current sensor of lightning protection device whether fault can being judged in above-mentioned secondary circuit 2, above-mentioned electricity leakage sensor sent early warning signal before catastrophic failure appears in above-mentioned lightning protection device, and above-mentioned leakage current sensor is arranged in above-mentioned lightning protection loop.
Wherein, above-mentioned primary circuit 1 comprises input circuit and output loop, and above-mentioned primary circuit 1 and secondary circuit 2 intersect and comprise lightning protection loop.
Concrete, above-mentioned input circuit comprises two sub-input circuits, one of them sub-input circuit comprise connect successively positive pole input, positive electrode bus and isolating switch; The sub-input circuit of another one comprise connect successively negative pole input, negative electrode bus and above-mentioned isolating switch; Above-mentioned positive pole input is connected in the positive pole group string input of header box outside, and above-mentioned negative pole input is connected to the negative pole group string input of header box outside; Above-mentioned two sub-input circuits conflux to export by above-mentioned isolating switch set and form above-mentioned output loop.
The lightning-protection module that above-mentioned lightning protection loop comprises ground connection and the above-mentioned electricity leakage sensor be connected with above-mentioned lightning-protection module, above-mentioned lightning-protection module comprises: one receive line in above-mentioned positive electrode bus, one receive line on above-mentioned negative electrode bus and a ground wire.
In the present embodiment, above-mentioned early warning signal is directly sent by above-mentioned leakage current sensor, and the mode that above-mentioned leakage current sensor sends early warning signal comprises: communication output, output switch parameter, analog output.
The kind of above-mentioned early warning signal comprises: voltage signal, current signal, voice signal, light signal, on-off model.
The principle of the present embodiment is: first arrange electric current alarming value at leakage current sensor, leakage current sensor is arranged in lightning protection loop, the size of leakage current in lightning protection loop is detected by it, if when the leakage current value detected reaches presetting alarming value, then send lightning protection device failure alarm signal, realize lightning protection early warning failure function.
Above-mentioned header box when performance starts to reduce before lightning protection device lost efficacy, can send early warning in advance, avoids because of major accidents such as its fault, on fire, the blasts that causes of losing efficacy, thus ensure that the safety of header box and relevant device thereof.
Embodiment 2
As shown in Figure 2, a kind of photovoltaic combiner box with lightning protection early warning failure function has been opened in the present embodiment, it comprises casing and is arranged on the primary circuit 1 of above-mentioned box house and the secondary circuit 2 for lightning protection failure detection and early warning, one is provided with for monitoring leakage current in lightning protection loop and the leakage current sensor of lightning protection device whether fault can being judged in above-mentioned secondary circuit 2, above-mentioned electricity leakage sensor sent early warning signal before catastrophic failure appears in above-mentioned lightning protection device, and above-mentioned leakage current sensor is arranged in above-mentioned lightning protection loop; And be also provided with an Intelligent Measurement module in above-mentioned secondary circuit 2, above-mentioned Intelligent Measurement module is connected with above-mentioned leakage current sensor, above-mentioned leakage current sensor by output switch parameter to above-mentioned Intelligent Measurement module or by analog output in above-mentioned Intelligent Measurement module.
Wherein, above-mentioned primary circuit 1 comprises input circuit and output loop, and above-mentioned primary circuit 1 and secondary circuit 2 intersect and comprise lightning protection loop.
Concrete, above-mentioned input circuit comprises two sub-input circuits, one of them sub-input circuit comprise connect successively positive pole input, positive electrode bus and isolating switch; The sub-input circuit of another one comprise connect successively negative pole input, negative electrode bus and above-mentioned isolating switch; Above-mentioned positive pole input is connected in the positive pole group string input of header box outside, and above-mentioned negative pole input is connected to the negative pole group string input of header box outside; Above-mentioned two sub-input circuits conflux to export by above-mentioned isolating switch set and form above-mentioned output loop.
The lightning-protection module that above-mentioned lightning protection loop comprises ground connection and the above-mentioned electricity leakage sensor be connected with above-mentioned lightning-protection module, above-mentioned lightning-protection module comprises: one receive line in above-mentioned positive electrode bus, one receive line on above-mentioned negative electrode bus and a ground wire.In fact, above-mentioned lightning protection loop is draw a ground wire on the earth point in case from the earth terminal of above-mentioned lightning protection device, and above-mentioned leakage current sensor detects the electric current on above-mentioned ground wire.
In the present embodiment, above-mentioned early warning signal can be sent by leakage current sensor, also can be to be sent by Intelligent Measurement module; The mode that above-mentioned leakage current sensor sends early warning signal comprises: communication output, output switch parameter, analog output; The kind of above-mentioned early warning signal comprises: voltage signal, current signal, voice signal, light signal, on-off model.
The principle of the present embodiment is: first in above-mentioned Intelligent Measurement module or leakage current sensor electric current alarming value is set, leakage current sensor is arranged in lightning protection loop, the size of leakage current in lightning protection loop is detected by it, if when the leakage current value detected reaches presetting alarming value, then send lightning protection device failure alarm signal, realize lightning protection early warning failure function.
Above-mentioned header box when performance starts to reduce before lightning protection device lost efficacy, can send early warning in advance, avoids because of major accidents such as its fault, on fire, the blasts that causes of losing efficacy, thus ensure that the safety of header box and relevant device thereof.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. the photovoltaic combiner box with lightning protection early warning failure function, it comprises casing and is arranged on the primary circuit of described box house and the secondary circuit for lightning protection failure detection and early warning, it is characterized in that, one is provided with for monitoring leakage current in lightning protection loop and the leakage current sensor of lightning protection device whether fault can being judged in described secondary circuit, described electricity leakage sensor sent early warning signal before catastrophic failure appears in described lightning protection device, and described leakage current sensor is arranged in described lightning protection loop.
2. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 1, it is characterized in that, Intelligent Measurement module is also provided with in described secondary circuit, described Intelligent Measurement module is connected with described leakage current sensor, described leakage current sensor by output switch parameter to described Intelligent Measurement module or by analog output in described Intelligent Measurement module.
3. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 2, it is characterized in that, described early warning signal is directly sent by described leakage current sensor, or described early warning signal is sent by described Intelligent Measurement module.
4. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 3, is characterized in that, the mode that described early warning signal exports comprise following one or several: communication output, output switch parameter, analog output.
5. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 4, is characterized in that, the kind of described early warning signal comprise following one or more: voltage signal, current signal, voice signal, light signal, on-off model.
6. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 5, it is characterized in that, described primary circuit comprises input circuit and output loop, and described primary circuit and secondary circuit intersect and comprise lightning protection loop, are provided with intelligent detecting loop in described secondary circuit.
7. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 6, is characterized in that, described input circuit comprises two sub-input circuits, one of them sub-input circuit comprise connect successively positive pole input, positive electrode bus and isolating switch; The sub-input circuit of another one comprise connect successively negative pole input, negative electrode bus and described isolating switch; Described positive pole input is connected in the positive pole group string input of header box outside, and described negative pole input is connected to the negative pole group string input of header box outside; Described two sub-input circuits conflux to export by described isolating switch set and form described output loop.
8. a kind of photovoltaic combiner box with lightning protection early warning failure function according to claim 7, it is characterized in that, described lightning protection loop is draw a ground wire on the earth point in case from the earth terminal of described lightning protection device, and described leakage current sensor detects the electric current on described ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021915.5A CN104579157A (en) | 2015-01-16 | 2015-01-16 | Photovoltaic convergence box with lightning protection failure early warning function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021915.5A CN104579157A (en) | 2015-01-16 | 2015-01-16 | Photovoltaic convergence box with lightning protection failure early warning function |
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| CN104579157A true CN104579157A (en) | 2015-04-29 |
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| CN201510021915.5A Pending CN104579157A (en) | 2015-01-16 | 2015-01-16 | Photovoltaic convergence box with lightning protection failure early warning function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067945A (en) * | 2015-09-07 | 2015-11-18 | 苏州长风自动化科技有限公司 | Intelligent detection unit with direct-current arcing detection function and junction box |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080122293A1 (en) * | 2006-10-13 | 2008-05-29 | Pv Powered, Inc. | System and Method for Anti-Islanding, Such as Anti-Islanding for a Grid-Connected Photovoltaic Inverter |
| CN201594731U (en) * | 2009-12-11 | 2010-09-29 | 深圳市永联科技有限公司 | Intelligent photovoltaic array lightning-proof header box |
| CN201985131U (en) * | 2011-01-19 | 2011-09-21 | 常州中弘光伏有限公司 | Photovoltaic array lightning-protection header box |
| CN202352696U (en) * | 2011-11-22 | 2012-07-25 | 国电南京自动化股份有限公司 | Intelligent photovoltaic array lightning-proof combiner box |
| CN203071839U (en) * | 2012-09-25 | 2013-07-17 | 北京纳森新源科技有限公司 | Intelligent photovoltaic combiner box |
| CN203204052U (en) * | 2013-04-27 | 2013-09-18 | 国家电网公司 | Leakage current measurement system for lightning protection devices |
| CN204334468U (en) * | 2015-01-16 | 2015-05-13 | 苏州长风自动化科技有限公司 | A kind of photovoltaic combiner box with lightning protection early warning failure function |
-
2015
- 2015-01-16 CN CN201510021915.5A patent/CN104579157A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080122293A1 (en) * | 2006-10-13 | 2008-05-29 | Pv Powered, Inc. | System and Method for Anti-Islanding, Such as Anti-Islanding for a Grid-Connected Photovoltaic Inverter |
| CN201594731U (en) * | 2009-12-11 | 2010-09-29 | 深圳市永联科技有限公司 | Intelligent photovoltaic array lightning-proof header box |
| CN201985131U (en) * | 2011-01-19 | 2011-09-21 | 常州中弘光伏有限公司 | Photovoltaic array lightning-protection header box |
| CN202352696U (en) * | 2011-11-22 | 2012-07-25 | 国电南京自动化股份有限公司 | Intelligent photovoltaic array lightning-proof combiner box |
| CN203071839U (en) * | 2012-09-25 | 2013-07-17 | 北京纳森新源科技有限公司 | Intelligent photovoltaic combiner box |
| CN203204052U (en) * | 2013-04-27 | 2013-09-18 | 国家电网公司 | Leakage current measurement system for lightning protection devices |
| CN204334468U (en) * | 2015-01-16 | 2015-05-13 | 苏州长风自动化科技有限公司 | A kind of photovoltaic combiner box with lightning protection early warning failure function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067945A (en) * | 2015-09-07 | 2015-11-18 | 苏州长风自动化科技有限公司 | Intelligent detection unit with direct-current arcing detection function and junction box |
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Application publication date: 20150429 |