CN106656018B - A kind of solar photovoltaic generation system - Google Patents

A kind of solar photovoltaic generation system Download PDF

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Publication number
CN106656018B
CN106656018B CN201611014899.8A CN201611014899A CN106656018B CN 106656018 B CN106656018 B CN 106656018B CN 201611014899 A CN201611014899 A CN 201611014899A CN 106656018 B CN106656018 B CN 106656018B
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China
Prior art keywords
lightning
generation system
solar photovoltaic
photovoltaic generation
inverter
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CN201611014899.8A
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Chinese (zh)
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CN106656018A (en
Inventor
陈威
张威
张陈生
张贵林
毛辉
刘煌仔
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201611014899.8A priority Critical patent/CN106656018B/en
Publication of CN106656018A publication Critical patent/CN106656018A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30Electrical components
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/40Connection to earth
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/80Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The present invention provides a kind of solar photovoltaic generation system, including:Photovoltaic array, DC earthing case, inverter, A.C. distribution box, equipotential link row, grounding body, junction box and and distribution board;Photovoltaic array, DC earthing case, inverter and A.C. distribution box are sequentially connected, and disperse to be equipped with lightning-arrest element in the connection line of photovoltaic array;The metal outer frame and DC earthing case of photovoltaic array, the metal shell of inverter and A.C. distribution box are arranged by equipotential link connect with grounding body respectively;The output end of A.C. distribution box is connected with junction box, and junction box connects distribution board;Cable, DC earthing case between photovoltaic array and DC earthing case and the cable between inverter and the cable between inverter and A.C. distribution box access equipotential link row indirectly by lightning-arrest element respectively.Said program according to the present invention can be more effectively prevented from damage of the lightning stroke to solar photovoltaic generation system.

Description

A kind of solar photovoltaic generation system
Technical field
The present invention relates to solar-photovoltaic technology field more particularly to a kind of solar photovoltaic generation systems.
Background technology
Currently, global energy is in short supply, and people more and more begin to use novel, green, the environmentally friendly energy as tradition The supplement and substitute of the energy, solar energy are exactly one such.Solar photovoltaic generation system, abbreviation PV systems are a kind of Using the photovoltaic effect of semiconductor, the system that solar radiation energy is directly changed into electric energy, solar photovoltaic generation system base Originally it is divided into two major classes, respectively Independent Power Generation type and grid-connected.Solar photovoltaic generation system is as a kind of emerging hair Electric system has been concerned in energy power field and extensive use.
Since the distribution area of solar battery array is big, and mounted on the outdoor that does not cover, thus be easy by Too high voltages caused by thunder and lightning influence, and cause photovoltaic generating system to damage, it is therefore necessary to take corresponding lightning protection measures.
Invention content
In view of this, the present invention provides a kind of solar photovoltaic generation system, lightning stroke can be more effectively prevented to the sun The damage of energy photovoltaic generating system.
According to the first aspect of the invention, a kind of solar photovoltaic generation system is provided, the system comprises solar energies Photovoltaic array, DC earthing case, inverter, A.C. distribution box, equipotential link row, grounding body, junction box and distribution board;It is described Photovoltaic array, DC earthing case, inverter and A.C. distribution box are sequentially connected, the company of the photovoltaic array Dispersion is equipped with lightning-arrest element in link;It is the metal outer frame of the photovoltaic array and the DC earthing case, inverse The metal shell for becoming device and A.C. distribution box is connect by equipotential link row with grounding body respectively;The A.C. distribution box it is defeated Outlet is connected with the junction box, and the junction box connects the distribution board;The photovoltaic array and the direct current Cable, the DC earthing case between grounding box and the cable between the inverter and inversion are exchanged with described Cable between distribution box accesses equipotential link row indirectly by lightning-arrest element respectively.
Further, the lightning-arrest element installed in the connection line of the photovoltaic array includes direct current surge protection Device.
Further, it is also equipped with lightning protection transformer in the connection line of the photovoltaic array.
Further, direct current Surge Protector, the inverter and AC distribution are installed in the DC earthing case Exchange Surge Protector is installed in case.
Further, capacitance-resistance overvoltage protection device is installed in the DC earthing case, inverter and A.C. distribution box.
Further, lightning-arrest element is installed in the distribution board.
Further, the output end of the distribution board is equipped with the transformer of resistance to thunder.
Further, lightning-arrest element is installed in the junction box.
Lightning protection device is mounted in the link circuit of photovoltaic array by said program according to the present invention, can be more Effectively protection lightning stroke damage caused by solar battery array;Also, lightning protection is installed to become in photovoltaic array connection line Depressor further blocks the intrusion of lightning surge;In addition, by photovoltaic array, DC earthing case, inverter and Surge Protector is installed in A.C. distribution box, avoids instantaneous mistake caused by the lightning surge invaded from DC line or alternating current circuit Voltage;For the lightning surge invaded from the low-voltage distributing line of solar photovoltaic generation system, by being installed in distribution board Arrester is stopped, and the overvoltage numerical value of energy limiting device, plays the role of protecting equipment;It is installed in distribution board outlet side The transformer of resistance to thunder avoids high voltage caused by lightning ingress from damaging power load.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention, And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of solar photovoltaic generation system according to an embodiment of the invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing Go out the every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
It is illustrated with reference to Fig. 1 the solar photovoltaic generation system of the present invention first, Fig. 1 is shown according to one embodiment of the invention Solar photovoltaic generation system schematic diagram.
As shown in Figure 1, the solar photovoltaic generation system of the present invention, including photovoltaic array 11, DC earthing case 12, inverter 13, A.C. distribution box 14, equipotential link row 15, grounding body 16, junction box 17 and distribution board 18;It is described too Positive energy photovoltaic plate array 11, DC earthing case 12, inverter 13 and A.C. distribution box 14 are sequentially connected;The photovoltaic Dispersion is equipped with lightning-arrest element in the connection line of array 11;The metal outer frame of the photovoltaic array 11 and described The metal cabinet of DC earthing case 12, inverter 13 and A.C. distribution box 14 passes through equipotential link row 15 and grounding body 16 respectively Connection;Metal penetration pipe 19 is connect also by equipotential link row 15 with grounding body 16;The output end of the A.C. distribution box 14 It is connected with junction box 17, the junction box 17 connects distribution board 18;Between photovoltaic array 11 and DC earthing case Cable difference between cable and inverter 13 and A.C. distribution box between cable, DC earthing case 12 and inverter 13 By lightning-arrest element 20, access equipotential link arranges 15 indirectly.
Thunder and lightning is divided into direct lightning strike and inductive lightning, direct lightning strike refer to fall directly on photovoltaic array, direct-flow distribution system, Electrical equipment and its wiring etc. and the nearby lightning stroke of surrounding.Inductive lightning is also referred to as lightning induction or induced overvoltage, refer to The lightning stroke that related building, the attachment of equipment or circuit and farther place generate, causes the mistake of building, equipment and circuit The energy of voltage, inductive lightning is much smaller than direct lightning strike, but odds is far above direct lightning strike.Inductive lightning is divided by electrostatic induction shape At thunder and the thunder that is formed by electromagnetic induction.The thunder formed by electrostatic induction, when charging cumulus close to ground, due to single thunder The unipolarity of cloud bar electricity, can always induce a large amount of reversed polarity bound charge on nigh metallic conductor, and metallic conductor The charge with thunder and lightning peer property can be accordingly generated far from electrification cumulus end, between metallic conductor and thundercloud and metal Conductor itself produces very high electrostatic potential (induced voltage), such as electric current the induction positive charge generated and the ground generated that is struck by lightning Left formation lightning surge after the negative electrical charge of table neutralizes;It is due to falling on the lightning stroke near cable by the thunder that electromagnetic induction is formed The lightning current of generation makes cable induction form lightning surge.
Since photovoltaic array is to carry out serial or parallel connection according to certain design by polylith solar cell to form , therefore the dispersion of lightning-arrest element is mounted in the series/parallel circuit in photovoltaic array 11 between solar cell, can more have Effect ground protection lightning stroke damage caused by photovoltaic array.
To prevent lightning induction, all metal objects of photovoltaic system are subjected to equipotential link and (are arranged by equipotential link 15 connection grounding bodies 16) to reduce the potential difference between each metal position and each system, wherein outside the metal of photovoltaic array 11 The uncharged metals such as frame, DC earthing case 12, the metal cabinet of inverter 13 and A.C. distribution box 14 and metal penetration pipe Component is directly connected to equipotential link row 15 with conducting wire respectively, will be between photovoltaic array 11 and DC earthing case The bands such as the cable between cable and inverter 13 and A.C. distribution box between cable, DC earthing case 12 and inverter 13 By lightning-arrest element 20, access equipotential link arranges 15 to electrical components indirectly respectively.The lightning-arrest element 20 for example can be lightning protection Device.
The solar photovoltaic generation system of the present invention is described in detail in conjunction with attached drawing further below.
A specific embodiment according to the present invention, that installs in the link circuit of the photovoltaic array 11 is lightning-arrest Element includes direct current Surge Protector.
Since inductive lightning can invade solar photovoltaic generation system along direct current incoming line, in photovoltaic battle array Direct current Surge Protector can be used in row connection line, mitigates the abnormal voltage invaded from circuit, reduce lightning surge peak value.
Further, it is also equipped with lightning protection transformer in the link circuit of the photovoltaic array 11.
Lightning protection transformer adds arrester and capacitor based on shielding insulation transformer, in lightning surge intrusion Occasion, because between built-in arrester primary side and secondary side high-insulation and shielding action, therefore in photovoltaic battle array Lightning protection transformer is installed in the connection line of row, lightning surge can be blocked.
Another specific embodiment according to the present invention, be equipped in the DC earthing case 12 direct current Surge Protector, Exchange Surge Protector is installed in the inverter 13 and A.C. distribution box 14.
Due to being the DC line not through inverter conversion inside DC earthing case, in DC earthing case Direct current Surge Protector is installed in portion's circuit;The installation exchange surge protection in the alternating current circuit of inverter and A.C. distribution box Device.Surge Protector can protect the surge of indirect thunder and lightning and direct effects of lightning or other instantaneous overvoltages.Surge is protected Shunting can be connected in shield device within the extremely short time, to avoid damage of the surge to other equipment in circuit, mitigation from being invaded from circuit The abnormal voltage entered reduces lightning surge peak value.
Another specific embodiment according to the present invention, the DC earthing case 12, inverter 13 and A.C. distribution box Capacitance-resistance overvoltage protection device is installed in 14.
Another specific embodiment according to the present invention is equipped with lightning-arrest element in the distribution board 18.Photovoltaic The intrusion path of the lightning surge of electricity generation system, in addition to solar battery array, also distribution line, for from low-voltage distribution wire The lightning surge of road intrusion can be stopped by installing element of taking shelter from the thunder in distribution board.
Wherein, the lightning-arrest element installed in distribution board is specifically as follows arrester, and arrester is in parallel with protected equipment, Its gap breakdown voltage is forced down than protected apparatus insulated breakdown potential, and when normal working voltage acts on, lightning arrester gap is not Can be breakdown, and when lightning surge is transmitted along conducting wire, occurs jeopardizing the overvoltage by protection equipment, lightning arrester gap quickly by Breakdown, discharges, a large amount of charge is made all to leak into ground, to limit by the overvoltage numerical value of protection equipment, play guarantor over the ground The effect for protecting equipment, avoids equipment damage.
Another specific embodiment according to the present invention, the outlet side of the distribution board are equipped with the transformer of resistance to thunder.Due to Distribution board connects power load, when solar energy photovoltaic system is struck by lightning, to avoid lightning stroke from causing transient high voltage, to electricity consumption Load damages, and the transformer of resistance to thunder is installed in distribution board outlet side, that is, distribution board and power load (user side) it Between the transformer of resistance to thunder is installed, avoid high voltage caused by lightning ingress from damaging power load.
Another specific embodiment according to the present invention is equipped with lightning-arrest element in the junction box.In the junction box The lightning-arrest element of installation can specifically include arrester, limits by the overvoltage numerical value of protection equipment, avoids equipment damage.
The solar photovoltaic generation system of the present invention is described above.Said program according to the present invention will be kept away Thunder element is mounted in the connection line of photovoltaic array, i.e., can between solar cell in the circuit of series/parallel Thunder and lightning is more effectively prevented to damage caused by solar battery array.Also, it is installed additional in photovoltaic array connection line anti- Thunder transformer further blocks the intrusion of lightning surge;In addition, by photovoltaic array, DC earthing case, inverter And Surge Protector and/or capacitance-resistance overvoltage protection device are installed in A.C. distribution box, it avoids defeated from direct current incoming line, exchange Instantaneous overvoltage caused by going out the lightning surge of circuit intrusion;For being invaded from solar photovoltaic generation system low-voltage distributing line Lightning surge, by being stopped in distribution board zinc oxide surge arresters, and can limit by the overvoltage numerical value of protection equipment, play Protect the effect of equipment;The transformer of resistance to thunder is installed in distribution board outlet side, avoids high voltage caused by lightning ingress negative to electricity consumption Load damages.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.Pacify for example, being equipped in the DC earthing case in direct current Surge Protector, the inverter and A.C. distribution box Equipped with exchange Surge Protector;Also, it is excessively electric to be also equipped with capacitance-resistance in the DC earthing case, inverter and A.C. distribution box Protector is pressed, multi-stage protection may be implemented, makes thunder-strike current by multistage lightning protection component aerial drainage.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to According to the technical spirit of the present invention to any simple modification, equivalent change and modification made by above example, this hair is still fallen within In the range of bright technical solution.

Claims (17)

1. a kind of solar photovoltaic generation system, which is characterized in that the system comprises photovoltaic array, DC earthings Case, inverter, A.C. distribution box, equipotential link row, grounding body, junction box and distribution board;The photovoltaic array, DC earthing case, inverter and A.C. distribution box are sequentially connected, and peace is disperseed in the connection line of the photovoltaic array Equipped with lightning-arrest element;The metal outer frame of the photovoltaic array and DC earthing case, inverter and AC distribution The metal shell of case is arranged by equipotential link connect with grounding body respectively;The output end of the A.C. distribution box and the wiring Case is connected, and the junction box connects the distribution board;Electricity between the photovoltaic array and the DC earthing case Between cable and the inverter and the A.C. distribution box between cable, the DC earthing case and the inverter Cable accesses equipotential link row indirectly by lightning-arrest element respectively, is installed in the connection line of the photovoltaic array Lightning-arrest element includes direct current Surge Protector.
2. solar photovoltaic generation system as described in claim 1, which is characterized in that the connection of the photovoltaic array Lightning protection transformer is also equipped in circuit.
3. solar photovoltaic generation system as claimed in claim 1 or 2, which is characterized in that installed in the DC earthing case There is direct current Surge Protector, exchange Surge Protector is installed in the inverter and A.C. distribution box.
4. solar photovoltaic generation system as claimed in claim 1 or 2, which is characterized in that the DC earthing case, inverter And capacitance-resistance overvoltage protection device is installed in A.C. distribution box.
5. solar photovoltaic generation system as claimed in claim 3, which is characterized in that the DC earthing case, inverter with And capacitance-resistance overvoltage protection device is installed in A.C. distribution box.
6. such as 1,2,5 any one of them solar photovoltaic generation system of claim, which is characterized in that pacify in the distribution board Equipped with lightning-arrest element.
7. solar photovoltaic generation system as claimed in claim 3, which is characterized in that be equipped with lightning-arrest member in the distribution board Part.
8. solar photovoltaic generation system as claimed in claim 4, which is characterized in that be equipped with lightning-arrest member in the distribution board Part.
9. such as 1,2,5,7,8 any one of them solar photovoltaic generation system of claim, which is characterized in that the distribution board Output end the transformer of resistance to thunder is installed.
10. solar photovoltaic generation system as claimed in claim 3, which is characterized in that the output end of the distribution board is installed There is the transformer of resistance to thunder.
11. solar photovoltaic generation system as claimed in claim 4, which is characterized in that the output end of the distribution board is installed There is the transformer of resistance to thunder.
12. solar photovoltaic generation system as claimed in claim 6, which is characterized in that the output end of the distribution board is installed There is the transformer of resistance to thunder.
13. such as 1,2,5,7,8,10,11,12 any one of them solar photovoltaic generation system of claim, which is characterized in that Lightning-arrest element is installed in the junction box.
14. solar photovoltaic generation system as claimed in claim 3, which is characterized in that be equipped in the junction box lightning-arrest Element.
15. solar photovoltaic generation system as claimed in claim 4, which is characterized in that be equipped in the junction box lightning-arrest Element.
16. solar photovoltaic generation system as claimed in claim 6, which is characterized in that be equipped in the junction box lightning-arrest Element.
17. solar photovoltaic generation system as claimed in claim 9, which is characterized in that be equipped in the junction box lightning-arrest Element.
CN201611014899.8A 2016-11-15 2016-11-15 A kind of solar photovoltaic generation system Active CN106656018B (en)

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CN106656018B true CN106656018B (en) 2018-11-02

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KR20120065830A (en) * 2010-12-13 2012-06-21 (주)청파이엠티 Smart solar generation system
JP2013201795A (en) * 2012-03-23 2013-10-03 Sharp Corp Photovoltaic power generation system with power storage device
CN203150933U (en) * 2013-01-05 2013-08-21 上海奇亚特能源股份有限公司 Collecting cabinet and photovoltaic power generation system
CN204089211U (en) * 2013-10-21 2015-01-07 北京京仪绿能电力系统工程有限公司 A kind of photovoltaic parallel in system of clustered control
CN103986412A (en) * 2014-05-09 2014-08-13 广西南宁百兰斯科技开发有限公司 Independent photovoltaic power generation system with lightning protection device
DE202015103181U1 (en) * 2015-06-17 2015-07-29 Abb Technology Ag Surge protection for inverters
CN105098837A (en) * 2015-09-02 2015-11-25 高金刚 Solar photovoltaic grid-connected system
CN105356840A (en) * 2015-11-27 2016-02-24 上海中兴派能能源科技有限公司 Photovoltaic power generation circuit and photovoltaic power generation circuit inverter allocation method
CN205389054U (en) * 2016-03-22 2016-07-20 漳州国绿太阳能科技有限公司 Photovoltaic grid -connected power station alternating current -direct current lightning protection distribution device
CN206195713U (en) * 2016-11-15 2017-05-24 珠海格力电器股份有限公司 Solar energy photovoltaic power generation system

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