CN208862564U - A kind of photovoltaic DC-to-AC converter lightning protection device - Google Patents
A kind of photovoltaic DC-to-AC converter lightning protection device Download PDFInfo
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- CN208862564U CN208862564U CN201821152728.6U CN201821152728U CN208862564U CN 208862564 U CN208862564 U CN 208862564U CN 201821152728 U CN201821152728 U CN 201821152728U CN 208862564 U CN208862564 U CN 208862564U
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Abstract
The utility model relates to a kind of photovoltaic DC-to-AC converter lightning protection device, the anode of photovoltaic DC-to-AC converter direct-flow input end is grounded by the cathode of the first lightning-protection module ground connection, direct-flow input end by the second lightning-protection module.Direct-flow input end each extremely upper setting lightning-protection module and reliable ground of the photovoltaic DC-to-AC converter lightning protection device of the utility model in photovoltaic DC-to-AC converter; it can guarantee to be responded in time when lightning impulse of any level-one by larger current; thunder-strike current is imported into the earth; reduce ground potential, photovoltaic DC-to-AC converter is protected not damaged by lightning impulse.
Description
Technical field
The utility model relates to a kind of photovoltaic DC-to-AC converter lightning protection devices, belong to field of photovoltaic power generation.
Background technique
Increasingly prominent today, solar energy is as a kind of clean renewable energy the energy crisis, environmental pollution the problems such as
There is good development prospect in source, and solar photovoltaic technology is more and more mature, also has begun batch and comes into operation.The sun
The safe and stable operation of energy photovoltaic power generation, which becomes, to be continued to develop urgent problem to be solved for photovoltaic power generation.
The general occupied area of the equipment of photovoltaic generating system is larger and is placed on top of building or outdoor higher position
Opening, easily by the harm of thunder and lightning；And the equipment such as solar power generation photovoltaic panel array bracket and photovoltaic DC-to-AC converter is outer
Shell mostly uses metal material, is easy to cause lightning stroke and generates powerful induced magnetic field electric current.Solar energy photovoltaic panel component and photovoltaic
Inverter is with high costs, and expendable damage can be generated after lightning stroke and causes economic loss, therefore is installed on photovoltaic DC-to-AC converter
Effective lightning protection and surge protection device are essential.
Utility model content
The purpose of the utility model is to provide a kind of photovoltaic DC-to-AC converter lightning protection devices, are subject to solve photovoltaic apparatus
The problem of being caused any property loss by thunder disaster.
To achieve the above object, the embodiment of the utility model includes:
A kind of photovoltaic DC-to-AC converter lightning protection device of the utility model, the anode of photovoltaic DC-to-AC converter direct-flow input end pass through
First lightning-protection module is grounded, the cathode of direct-flow input end passes through the second lightning-protection module and is grounded.
Further, it first lightning-protection module and the second lightning-protection module and is grounded by third lightning-protection module after connecing.
Further, the A phase of photovoltaic DC-to-AC converter ac output end passes through the B phase of A phase lightning-protection module ground connection, ac output end
Pass through C phase lightning-protection module ground connection by the C phase of B phase lightning-protection module ground connection, ac output end.
Further, the A phase lightning-protection module, B phase lightning-protection module and C phase lightning-protection module and after connecing by the 4th lightning protection mould
Block ground connection.
The photovoltaic DC-to-AC converter lightning protection device of the utility model is inputted in the direct-flow input end or direct current of photovoltaic DC-to-AC converter
The each extremely upper setting lightning-protection module and reliable ground of end and exchange outlet side, it is ensured that any level-one is by larger current
It is responded in time when lightning impulse, thunder-strike current is imported into the earth, reduces ground potential, photovoltaic DC-to-AC converter is protected not rushed by thunder and lightning
It hits and damages.
Further, the neutral conductor of photovoltaic DC-to-AC converter ac output end connects the A phase lightning protection mould by gas-discharge tube
Block, B phase lightning-protection module and C phase lightning-protection module and connect end.
Gas-discharge tube has many advantages, such as that parasitic capacitance is small, and insulation resistance is greatly and lightning current ability of releasing is strong, when the pole N by
It when the heavy currents such as thunder and lightning influence, can guarantee lightning current of timely releasing, protect photovoltaic DC-to-AC converter, and reduce thunder and lightning to grid-connected
The influence of system.
Further, the positive and negative interpolar of photovoltaic DC-to-AC converter direct-flow input end is additionally provided with electric capacity of voltage regulation；On positive and negative anodes respectively
Equipped with ground connection filter capacitor.
Filtering and voltage regulator circuit are formed by capacitor in direct-flow input end, filtered out due to caused by lightning stroke or induced current
Voltage fluctuation so that input inverter voltage it is more stable.
Further, ground connection pressure stabilizing is respectively equipped on the A phase, B phase, C phase of photovoltaic DC-to-AC converter ac output end and the neutral conductor
Capacitor；RC filter circuit is provided between A phase, B phase, C phase any two.
Filtering and voltage regulator circuit are formed by capacitor in exchange outlet side, inhibits the spine pulse high-voltage of output, improves
Output end wave mode, is closer to sinewave output, so that the ac power waveform of output is more smooth, reduces to power grid and electricity consumption
The harm of equipment.
Additionally by RC filter circuit, high-frequency harmonic is filtered out, improves the quality of output electric energy.
Detailed description of the invention
Fig. 1 is three level system structure lightning protection schematic diagrames；
Fig. 2 is direct-flow input end lightning protection circuit schematic diagram；
Fig. 3 is ac output end lightning protection circuit schematic diagram.
Specific embodiment
The utility model is described in more detail with reference to the accompanying drawing.
Direct-flow input end lightning protection circuit schematic diagram as shown in Figure 2, direct-flow input end include DC terminal positive electrode bus
(line between PV+ to OUT+) and DC side negative electrode bus (line between PV- to OUT-), the side the PV connection of positive electrode bus
Photovoltaic panel, the side OUT connect photovoltaic DC-to-AC converter.DC terminal lightning protection include the lightning-protection module 1 being connected with positive electrode bus and with it is negative
Pole bus connected lightning-protection module 2 and lightning-protection module 3, it is real by lightning-protection module 3 after 2 parallel connection of lightning-protection module 1 and lightning-protection module
Now reliable electrical grounding.Lightning-protection module can be realized to be timely responded to be connected when corresponding bus is impacted by larger current, will
Electric current imports the earth.
Direct-flow input end further includes that filtering and voltage regulator circuit are made of capacitor C1/C2/C3, and C1 is connected to positive electrode bus and bears
Between the bus of pole, positive electrode bus is grounded by C2, and negative electrode bus is grounded by C3.For filtering out due to lightning stroke or induced current
Caused voltage fluctuation, so that the voltage of input inverter is more stable.
Ac output end lightning protection circuit schematic diagram as shown in Figure 3, ac output end include A phase bus (connection electricity
Net U phase), B phase bus (connection power grid V phase), C phase bus (connection power grid W phase) and zero curve N (neutral conductor).Exchange end lightning protection
Protection includes the lightning-protection module 4 being connected with A phase bus, the lightning-protection module 5 being connected with B phase bus and is connected with C phase bus anti-
Thunder module 6 and lightning-protection module 7 are grounded after lightning-protection module 4, lightning-protection module 5,6 parallel connection of lightning-protection module by lightning-protection module 7.It hands over
Stream end lightning protection further includes that zero curve N is grounded by gas-discharge tube and lightning-protection module 7.
In order to inhibit the spine pulse high-voltage of output, improve output end wave mode, ac output end further includes by capacitor C4/
The filtering of C5/C6/C10/C11/C12/C13 composition and voltage regulator circuit；A phase passes through C4, C10 ground connection, and B phase passes through C5, C11 and connects
Ground, C phase pass through C6, C12 ground connection, and zero curve N is grounded by C13.Filtering and voltage regulator circuit can make output waveform closer to sine
Wave output reduces the harm to power grid and electrical equipment so that the ac power waveform of output is more smooth.
Ac output end further includes the RC filter circuit being made of resistance R1/R2/R3 and capacitor C7/C8/C9, for filtering out
High-frequency harmonic improves the quality of output electric energy.R1 and C7 parallel connection is followed by between A phase and B phase, R2 and C8 parallel connection is followed by B phase
Between C phase, R3 and C9 parallel connection is followed by between A phase and C phase.
Three level system structure lightning protection schematic diagrames as shown in Figure 1 are grounded and take for using outside photovoltaic system
The method lightning protection connect, good ground connection, which reduces ground resistance, to import the earth for thunder-strike current, reduce ground potential, independent
Centralized earthing device should be arranged in lightning rod, and 4 Ω are not to be exceeded in ground resistance.It is used between each metal shell of equipment and bracket
Equipotential link can prevent that flashover or punch-through occur from each other, reduce Lightning disservice to the greatest extent.
As other embodiments, it also can according to need and only set in the direct-flow input end of photovoltaic DC-to-AC converter or ac output end
Set corresponding lightning protection, the present embodiment to this with no restriction.
Claims (4)
1. a kind of photovoltaic DC-to-AC converter lightning protection device, which is characterized in that the anode of photovoltaic DC-to-AC converter direct-flow input end passes through the
One lightning-protection module is grounded, the cathode of direct-flow input end passes through the second lightning-protection module and is grounded；First lightning-protection module and second is prevented
Thunder module is simultaneously grounded after connecing by third lightning-protection module；The A phase of photovoltaic DC-to-AC converter ac output end passes through A phase lightning-protection module and connects
Ground, ac output end B phase pass through B phase lightning-protection module ground connection, ac output end C phase pass through C phase lightning-protection module ground connection；It is described
A phase lightning-protection module, B phase lightning-protection module and C phase lightning-protection module are simultaneously grounded after connecing by the 4th lightning-protection module.
2. a kind of photovoltaic DC-to-AC converter lightning protection device according to claim 1, which is characterized in that photovoltaic DC-to-AC converter exchange
The neutral conductor of output end by gas-discharge tube connect the A phase lightning-protection module, B phase lightning-protection module and C phase lightning-protection module and
Connect end.
3. a kind of photovoltaic DC-to-AC converter lightning protection device according to claim 1, which is characterized in that photovoltaic DC-to-AC converter direct current
The positive and negative interpolar of input terminal is additionally provided with electric capacity of voltage regulation；Ground connection filter capacitor is respectively equipped on positive and negative anodes.
4. a kind of photovoltaic DC-to-AC converter lightning protection device according to claim 2, which is characterized in that photovoltaic DC-to-AC converter exchange
Ground connection electric capacity of voltage regulation is respectively equipped in the A phase, B phase, C phase and the neutral conductor of output end；It is arranged between A phase, B phase, C phase any two
There is RC filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821152728.6U CN208862564U (en) | 2018-07-18 | 2018-07-18 | A kind of photovoltaic DC-to-AC converter lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821152728.6U CN208862564U (en) | 2018-07-18 | 2018-07-18 | A kind of photovoltaic DC-to-AC converter lightning protection device |
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| CN208862564U true CN208862564U (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821152728.6U Active CN208862564U (en) | 2018-07-18 | 2018-07-18 | A kind of photovoltaic DC-to-AC converter lightning protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097987A (en) * | 2021-04-09 | 2021-07-09 | 华为技术有限公司 | Lightning protection device and photovoltaic power generation system |
| CN113922652A (en) * | 2021-11-17 | 2022-01-11 | 阳光电源股份有限公司 | Inverter, inverter system, lightning protection circuit and control method of lightning protection circuit |
| CN115453208A (en) * | 2022-09-26 | 2022-12-09 | 国网山东省电力公司莱西市供电公司 | Photovoltaic power plant lightning protection ground resistance monitoring system |
-
2018
- 2018-07-18 CN CN201821152728.6U patent/CN208862564U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113922652A (en) * | 2021-11-17 | 2022-01-11 | 阳光电源股份有限公司 | Inverter, inverter system, lightning protection circuit and control method of lightning protection circuit |
| CN113922652B (en) * | 2021-11-17 | 2024-02-09 | 阳光电源股份有限公司 | Inverter, inverter system, lightning protection circuit and control method of lightning protection circuit |
| CN115453208A (en) * | 2022-09-26 | 2022-12-09 | 国网山东省电力公司莱西市供电公司 | Photovoltaic power plant lightning protection ground resistance monitoring system |
| CN115453208B (en) * | 2022-09-26 | 2023-09-22 | 国网山东省电力公司莱西市供电公司 | Lightning protection grounding resistance monitoring system of photovoltaic power station |
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