CN201846074U - Lightning-proof control device for photovoltaic power generating system - Google Patents

Lightning-proof control device for photovoltaic power generating system Download PDF

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Publication number
CN201846074U
CN201846074U CN 201020590822 CN201020590822U CN201846074U CN 201846074 U CN201846074 U CN 201846074U CN 201020590822 CN201020590822 CN 201020590822 CN 201020590822 U CN201020590822 U CN 201020590822U CN 201846074 U CN201846074 U CN 201846074U
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CN
China
Prior art keywords
lightning
temperature safety
generating system
safety tube
lightning protection
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Expired - Fee Related
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CN 201020590822
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Chinese (zh)
Inventor
王士元
熊景峰
宋登元
张雷
甄云云
雷浩
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Lixian Yingli New Energy Resources Co Ltd
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Yingli Energy China Co Ltd
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Abstract

The utility model discloses a lightning-proof control device for a photovoltaic power generating system, which is arranged in the photovoltaic power generating system and comprises lightning arresters, special grounding wires, lightning proofing devices and a surge protective device, wherein the lightning arresters are arranged on non-conducting roofs of a photovoltaic battery pack bracket, a controller and an inverter; the special grounding wires are connected with metal devices and a grounding main line in the system; the lightning proofing devices are arranged in a solar battery array connection box, the controller and the inverter; and the surge protective device is arranged at an alternating current output end. The lightning-proof control device for the photovoltaic power generating system disclosed by the embodiment of the utility model fulfills the aim of avoiding the photovoltaic power generating system being damaged under the action of lightning to influence the normal work so as to improve the working stability of the photovoltaic power generating system through devices such as the lightning arresters, the lightning proofing devices and the like which are arranged in the photovoltaic power generating system.

Description

Photovoltaic generating system lightning protection controller for electric consumption
Technical field
The utility model relates to the photovoltaic power generation technology field, relates in particular to a kind of photovoltaic generating system lightning protection controller for electric consumption.
Background technology
Photovoltaic generation is to convert solar energy to generation technology that electric energy is used by the crystal silicon semiconductor material.The crystal silicon semiconductor material is made up of PN junction, and in normal working conditions, PN junction can bear the high voltage that comprises the electrostatic induction electricity and impact.But under the contour current field condition of thunder and lightning, work, be very easy to be damaged.
Photovoltaic generating system is made up of equipment such as photovoltaic cell square formation, batteries, charging-discharging controller, inverter, AC power distribution cabinet/AC distribution panels.With the technology of photovoltaic generating system, be widely used in urban traffic signal indication mechanism, city street lamp system, highway display system and large-scale grid-connected system as power supply.Photovoltaic battery panel all is installed in outdoor roof or spacious place mostly, so thunder and lightning directly hits photovoltaic battery panel probably, the semi-conducting material that photovoltaic module is made up of PN junction, also have devices such as rectification anti-backflow diode simultaneously, thunder and lightning acts on gently then can cause on the photovoltaic module between the assembly PN junction and punctures and the anti-backflow diode breakdown, heavy then can controller or inverter, controller to DC load, inverter to the power distribution electroplax and distribution board to the supply line of AC load etc., produce surge voltage, damage peripheral electric equipment.
The utility model content
In view of this, the utility model provides a kind of photovoltaic generating system lightning protection controller for electric consumption, to solve the problem of thunder and lightning destruction photovoltaic generating system in the prior art.
Its concrete scheme is as follows:
A kind of photovoltaic generating system lightning protection controller for electric consumption is arranged in the described photovoltaic generating system, comprising: be arranged at the lightning arrester on the non-conductive roof of photovoltaic cell component support, controller and inverter; The special-purpose earth connection of metal device and ground connection main line in the connected system; Be arranged at the lightning protection device in solar cell array junction box, controller and the inverter; Be arranged at the Surge Protector of ac output end.
Preferably, described lightning arrester comprises annular lighting proof strip and/or the lightning rod with a plurality of independent downleads.
Preferably, described metal device comprises: equipment metal shell, frame, metallic conduit and cable metal crust.
Preferably, described lightning protection device is arranged in the power supply box.
Preferably, described lightning protection device comprises: exchange lightning protection device and DC lightning prevention device.
Preferably, described interchange lightning protection device comprises: be connected in parallel on first branch circuit and second branch circuit between live wire and zero line; Described first branch circuit comprises: first piezo-resistance that is linked in sequence successively and first temperature safety tube; Described second branch circuit comprises second piezo-resistance, second temperature safety tube, the 3rd temperature safety tube and the 3rd piezo-resistance of series connection successively; Pass through ceramic gas discharge tube ground connection between described second temperature safety tube and the 3rd temperature safety tube.
Preferably, described second temperature safety tube links to each other with described ceramic gas discharge tube by the power frequency fuse with described the 3rd temperature safety tube.
Preferably, described DC lightning prevention device comprises: be connected in series in piezo-resistance and temperature safety tube between power positive cathode successively; Pass through ceramic discharge tube ground connection between described temperature safety tube and described power cathode.
Preferably, described DC lightning prevention device also comprises the electric current fuse that is connected between described temperature safety tube and ceramic discharge tube.
From above-mentioned technical scheme as can be seen, the disclosed photovoltaic generating system lightning protection of the utility model embodiment controller for electric consumption is by being arranged on equipment such as lightning arrester in the photovoltaic generating system, lightning protection device, realization avoids photovoltaic generating system to be damaged under the thunder and lightning effect, influence operate as normal, thereby improve the purpose of photovoltaic generating system job stability.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the disclosed photovoltaic generating system lightning protection of a utility model embodiment controller for electric consumption structural representation;
Fig. 2 is the disclosed interchange lightning protection device of a utility model embodiment electrical block diagram;
Fig. 3 is the disclosed DC lightning prevention device of a utility model embodiment electrical block diagram.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model discloses a kind of photovoltaic generating system lightning protection controller for electric consumption, be arranged in the photovoltaic generating system, its embodiment is as follows:
The structure of the disclosed photovoltaic generating system lightning protection of the utility model embodiment control device comprises as shown in Figure 1: lightning arrester 11, special-purpose earth connection 12, lightning protection device 13 and Surge Protector 14.
The protection of direct lightning strike is comprised protection to photovoltaic battery array and photovoltaic plant array; to the photovoltaic battery array of open air effectively be protected; at first estimate the thunderbolt number of times correct calculation photovoltaic battery array year; utilizing rolling ball method to calculate then needs lightning-arrest scope; the scope of lightning protection, it depends on the protection level of protected object.For 1 class, II class, III class lightning protection rank, the value of its protection range diameter D is respectively 20 meters, 45 meters, 60 meters.Probability size by the incident of may being struck by lightning to photovoltaic plant is analyzed, because lightning wave is invaded the probability maximum that controller in the control machine room or inverter are damaged.Because the full indoor type of the general employing of controller and inverter; for making photovoltaic cell component, controller and inverter that reliable protection be arranged when being subjected to direct lightning strike and induction thunder; lightning arrester 11 is arranged on the non-conductive roof of photovoltaic cell component support, controller and inverter the lightning rod that lightning arrester can be higher than protected target for annular lighting proof strip with a plurality of independent downleads or installation site.Lighting proof strip is provided with several independent downleads, thunder and lightning is introduced underground, forms equal potential difference with ground, and the thunder and lightning cloud electric field that makes electric field strength be increased to limiting value distorts, and beginning ionization and descending guide discharge; Lighting proof strip or lightning rod produce point discharge under the highfield effect, form upwards guide's discharge; Both join and form the thunder and lightning path, and thunder and lightning is introduced the earth to play lightning-arrest effect.
Special-purpose earth connection 12 is used for metal device and ground connection main line in the connected system, metal device comprises equipment metal shell, frame, metallic conduit, cable metal crust etc., special-purpose earth connection 12 is linked into the ground connection main line separately with above-mentioned metal device, to prevent that thunder and lightning from destroying the electric property of equipment or pipeline, the work generation of equipment is disturbed and destruction.
The main path that lightning wave is invaded be aerial condutor and photovoltaic array to the lead-in of machine room, take multistage safeguard procedures that grid-connected photovoltaic system is protected for this reason.Lightning protection device 13 is installed in the solar cell array junction box, and is kept photovoltaic cell square formation junction box and control cubicle spacing greater than 10m, the lightning protection device in controller and inverter makes it have the lightning protection function simultaneously.
At ac output end, change the way that the low pressure valve type arrester is installed in the design in the past on the overhead outlet bar, use sensitive more, safety, Surge Protector 14 easily instead.
Above-mentioned lightning protection device all is installed in the power supply box of rain-proof dust-proof, is fixed on the overhead outlet bar, prevents that with this lightning wave from entering machine room by transmission line.
In the disclosed photovoltaic generating system lightning protection of the present embodiment control device; characteristics at different parts in the system are provided with lightning protection measures respectively; the mode that adopts lightning arrester and lightning protection device to combine; guaranteed that system's various piece all has the lightning protection function, realized the purpose of system's steady operation under thunder and lightning.
Lightning protection device in the disclosed photovoltaic generating system lightning protection of the utility model embodiment control device comprises interchange lightning protection device and DC lightning prevention device, to be applicable to different electric current environment respectively, carries out lightning protection.The circuit structure of interchange lightning protection device comprises: first branch circuit 23 and second branch circuit 24 that are connected in parallel on 22 of live wire 21 and zero lines as shown in Figure 2; Described first branch circuit 23 comprises: first piezo-resistance 231 that is linked in sequence successively and first temperature safety tube 232; Described second branch circuit 24 comprises second piezo-resistance 241, second temperature safety tube 242, the 3rd temperature safety tube 243 and the 3rd piezo-resistance 244 of series connection successively,, 243 of second temperature safety tube 242 and the 3rd temperature safety tubes pass through ceramic gas discharge tube 25 ground connection.
As seen from the figure, the circuit in the present embodiment adopts the composite symmetrical circuit, can select the common mode form for use, also can select the differential mode form for use, and live wire L can be connected arbitrarily with zero line N, and is safe.After the piezo-resistance short circuit was lost efficacy, break away from circuit, avoid causing fire.
The pressure sensitive voltage value reference table-1 of piezo-resistance:
Choose, require to select its overall dimension and packing forms according to discharge capacity then, discharge capacity also claims through-current capacity, be meant in defined terms (with official hour interval and number of times, apply the impulse current of standard) under, allow by the maximum impulse on the varistor (peak value) current value.When independent piezo-resistance can't satisfy demand in the practical application, can adopt the mode of the approaching a plurality of piezo-resistance parallel connections of resistance, each piezo-resistance temperature safety tube of all will connecting separately during connection is to increase the service life and to guarantee safety.The higher pressure sensitive voltage of resistance value is safer, durable, and failure rate is low, but residual voltage is slightly high, can choose the piezo-resistance that is fit to resistance according to practical situations.
130 ℃~135 ℃ of the general employings of temperature safety tube, 10A/250V's, should good thermal coupling be arranged with piezo-resistance.Further, in order better to play a protective role, the power frequency fuse of can connecting in circuit is in case power-frequency overvoltage moment puncture piezo-resistance is on fire.Its particular location does not limit, and connects with piezo-resistance as long as guarantee.
The discharge capacity of ceramic gas discharge tube discharge capacity is as requested selected, and dc breakdown voltage is 470V~600V.When the discharge capacity that requires≤3KA, can replace with glass discharge vessel, when the system encounters thunder-strike current was excessive, the ceramic discharge tube conducting was introduced the earth with electric current, avoided super-high-current to burn circuit devcie, influenced operate as normal.
Piezo-resistance and ceramic gas discharge tube are all pressed the derate value of impacting more than 10 times and are calculated discharge capacity, and piezo-resistance derate value is about 1/3rd of an one-shot discharge capacity, and ceramic gas discharge tube derate value is about half of maximum discharge capacity.Concrete numerical value can be chosen according to actual conditions.
The disclosed alternating current power supply lightening protector of present embodiment can be installed in the three-phase and four-line AC power; in the input of single-phase two wires power supply or output and suitable switchgear house, power distribution cabinet, switch cubicle, alternating current-direct current power distribution control system and other the various equipment important, that experience is struck by lightning easily, system avoids the infringement that Lightning Over-voltage causes with the protection device power supply (DPS).Do not limit in the present embodiment and adopt the composite symmetrical circuit, adopt asymmetric circuit also can realize function corresponding, just with respect to asymmetric circuit, the lightning protection effect of composite symmetrical circuit is better, connects simplyr, and fail safe is higher.
The circuit structure of the disclosed DC lightning prevention device of the utility model embodiment comprises as shown in Figure 3: the piezo-resistance 33 and the temperature safety tube 34 that are connected in series in 32 at positive source 31 and negative pole successively; 32 of temperature safety tube 34 and power cathodes pass through ceramic discharge tube 35 ground connection.
Choosing of its concrete various piece according to as described in above-mentioned embodiment, the DC power supply lightning protection device is arranged between the positive and negative electrode of DC power supply and between anodal (or negative pole) and the ground usually, can prevent between the power line and damage that the lightning overvoltage between power line and the ground and transient voltage cause equipment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (9)

1. a photovoltaic generating system lightning protection controller for electric consumption is characterized in that, is arranged in the described photovoltaic generating system, comprising: be arranged at the lightning arrester on the non-conductive roof of photovoltaic cell component support, controller and inverter; The special-purpose earth connection of metal device and ground connection main line in the connected system; Be arranged at the lightning protection device in solar cell array junction box, controller and the inverter; Be arranged at the Surge Protector of ac output end.
2. device according to claim 1 is characterized in that, described lightning arrester comprises annular lighting proof strip and/or the lightning rod with a plurality of independent downleads.
3. device according to claim 2 is characterized in that, described metal device comprises: equipment metal shell, frame, metallic conduit and cable metal crust.
4. device according to claim 3 is characterized in that described lightning protection device is arranged in the power supply box.
5. device according to claim 4 is characterized in that, described lightning protection device comprises: exchange lightning protection device and DC lightning prevention device.
6. device according to claim 5 is characterized in that, described interchange lightning protection device comprises: be connected in parallel on first branch circuit and second branch circuit between live wire and zero line; Described first branch circuit comprises: first piezo-resistance that is linked in sequence successively and first temperature safety tube; Described second branch circuit comprises second piezo-resistance, second temperature safety tube, the 3rd temperature safety tube and the 3rd piezo-resistance of series connection successively; Pass through ceramic gas discharge tube ground connection between described second temperature safety tube and the 3rd temperature safety tube.
7. device according to claim 6 is characterized in that, described second temperature safety tube links to each other with described ceramic gas discharge tube by the power frequency fuse with described the 3rd temperature safety tube.
8. device according to claim 5 is characterized in that, described DC lightning prevention device comprises: be connected in series in piezo-resistance and temperature safety tube between power positive cathode successively; Pass through ceramic discharge tube ground connection between described temperature safety tube and described power cathode.
9. device according to claim 8 is characterized in that, described DC lightning prevention device also comprises the electric current fuse that is connected between described temperature safety tube and ceramic discharge tube.
CN 201020590822 2010-11-03 2010-11-03 Lightning-proof control device for photovoltaic power generating system Expired - Fee Related CN201846074U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950956A (en) * 2010-11-03 2011-01-19 英利能源(中国)有限公司 Lightning-proof electric control device of photovoltaic power generation system
CN103971503A (en) * 2014-05-15 2014-08-06 武汉科技大学 Wireless monitoring system for foundation stability of power transmission tower in goaf
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
CN110247384A (en) * 2019-04-18 2019-09-17 江苏海事职业技术学院 A kind of lightning-protection system and its lightening arresting method for outdoor power distribution station
CN113097987A (en) * 2021-04-09 2021-07-09 华为技术有限公司 Lightning protection device and photovoltaic power generation system
CN114614731A (en) * 2020-12-09 2022-06-10 北京华航无线电测量研究所 A frequency characteristic detection method of a dual-axis servo drive system
WO2024139945A1 (en) * 2022-12-27 2024-07-04 华为数字能源技术有限公司 Photovoltaic inversion system and lightning protection device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950956A (en) * 2010-11-03 2011-01-19 英利能源(中国)有限公司 Lightning-proof electric control device of photovoltaic power generation system
CN101950956B (en) * 2010-11-03 2013-01-02 英利能源(中国)有限公司 Lightning-proof electric control device of photovoltaic power generation system
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
CN103971503A (en) * 2014-05-15 2014-08-06 武汉科技大学 Wireless monitoring system for foundation stability of power transmission tower in goaf
CN110247384A (en) * 2019-04-18 2019-09-17 江苏海事职业技术学院 A kind of lightning-protection system and its lightening arresting method for outdoor power distribution station
CN114614731A (en) * 2020-12-09 2022-06-10 北京华航无线电测量研究所 A frequency characteristic detection method of a dual-axis servo drive system
CN113097987A (en) * 2021-04-09 2021-07-09 华为技术有限公司 Lightning protection device and photovoltaic power generation system
US11855449B2 (en) 2021-04-09 2023-12-26 Huawei Digital Power Technologies Co., Ltd. Lightning protection apparatus and photovoltaic power generation system
WO2024139945A1 (en) * 2022-12-27 2024-07-04 华为数字能源技术有限公司 Photovoltaic inversion system and lightning protection device

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Owner name: LIXIAN YINGLI NEW ENERGY RESOURCES CO., LTD.

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Effective date: 20120605

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Effective date of registration: 20120605

Address after: 071400 Hebei city of Baoding province Lixian County Yongsheng North Street, hi tech Industrial Park

Patentee after: Li County Yingli New Energy Co., Ltd.

Address before: 071051 Chaoyang North Street, Hebei, Baoding, No. 3399

Patentee before: Yingli Energy (China) Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110525

Termination date: 20181103