CN206759389U - System is rapidly switched off applied to photovoltaic generation - Google Patents
System is rapidly switched off applied to photovoltaic generation Download PDFInfo
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- CN206759389U CN206759389U CN201720659440.7U CN201720659440U CN206759389U CN 206759389 U CN206759389 U CN 206759389U CN 201720659440 U CN201720659440 U CN 201720659440U CN 206759389 U CN206759389 U CN 206759389U
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- photovoltaic
- switch
- photovoltaic module
- rapidly
- junction box
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The application is related to field of photovoltaic power generation, more particularly to a kind of rapidly switches off system applied to photovoltaic generation.With high security and reliability.It is serially connected with photovoltaic module array, including rapidly switching off photovoltaic junction box, the photovoltaic module array includes some photovoltaic modulies, some photovoltaic modulies passed through after being connected in series by conflux/inversion box is delivered to AC network, AC network and conflux/inversion box between be provided with alternating-current system, concatenation rapidly switches off photovoltaic junction box between the adjacent photovoltaic module, for turning off photovoltaic module；The alternating-current system includes main switch and secondary lock, the main switch located at AC network and conflux/inversion box between, the secondary lock includes supply convertor, hand switch and automatic switch, the automatic switch and hand switch connect supply convertor respectively, and the supply convertor connection rapidly switches off photovoltaic junction box.There is the advantages of safe, stability is good on the whole.
Description
Technical field
It the utility model is related to field of photovoltaic power generation, more particularly to a kind of rapidly switch off system applied to photovoltaic generation.
Background technology
Nowadays photovoltaic generation has been widely used, but has a problem to trouble people more and more, be exactly when
Photovoltaic power station system breaks down when needing to enter maintenance, or such as earthquake, fire, floods occur needs salvor to enter
When, even if shut-off power network power supply, because photovoltaic module is still generating electricity, there are still the height that may jeopardize life safety in system
Piezoelectricity energy.
Therefore, provide that personnel enter in safety margin in 2017NEC690.12 photovoltaic system safety standards, it is desirable to can touch
Component voltage should drop to below 80V in 10 seconds.This just needs us to provide a component level Quick shut-off device,
To cut off the connection of each inter-module, any two points voltage in system is set to drop within that safe range.
To meet requirements above, industry, which has, releases intelligent photovoltaic terminal box scheme.Increase semiconductor in photovoltaic junction box
Switch, when critical situation occurs, by giving semiconductor switch one signal, to turn off component output.
However, practical application and theory analysis find that above-mentioned semiconductor switch scheme still has the problem of serious.Due to
The characteristic of semiconductor switch, when running into the high temperature conditions such as fire, semiconductor switch can be in conducting state so that above-mentioned " shut-off "
Failure, can not provide safety guarantee for system.
State Intellectual Property Office 2016-8-10 discloses the utility application of a TaiWan, China（CN
105846758 A, photovoltaic generating system and cutoff device）, it is disclosed that photovoltaic DC-to-AC converter described in a kind of cutoff device is closed
Or during failure, the photovoltaic DC-to-AC converter produces the first control signal；The cutoff device receives first control signal with disconnected
Open the photovoltaic array and the photovoltaic DC-to-AC converter.Photovoltaic generating system of the present utility model is with higher security and reliably
Property.And the structure of cutoff device is actually disclosed, cutoff device is connected with photovoltaic DC-to-AC converter signal, such as can be with photovoltaic inversion
Device circuit connects or wireless connection, so as to receive the first control signal of photovoltaic DC-to-AC converter and/or the second control signal.Shut-off
Device can disconnect the electrical connection of photovoltaic DC-to-AC converter and photovoltaic array according to the first control signal.Cutoff device can also be according to the second control
Signal processed recovers the electrical connection of photovoltaic DC-to-AC converter and photovoltaic array, so that photovoltaic DC-to-AC converter normal work, output electric energy to electricity
Net directly feeds client's use.（The 39th section and the 40th section of specification）.And the structure for actually disclosing cutoff device includes
Control circuit switching device and power supply circuit.Control circuit receives first control signal and second control signal, with
Corresponding controlling switch device disconnects and closure.Switching device 42 includes at least one set of switch, wherein every group of switch is electrically connected respectively
It is connected to one group of corresponding photovoltaic array unit.And actually define that cutoff device is relay or semiconductor switch（Specification
47-49 sections）.No matter cutoff device is relay or semiconductor switch, its relay is provided only on photovoltaic DC-to-AC converter and light
Between photovoltaic array, when relay turns off, the electrification component in photovoltaic array still has very high residual voltage, significantly larger than
Below 80V specified in 2017NEC690.12.Still there is the danger of electric shock as human contact and maintenance, security performance is low.It is false
It is semiconductor switch to determine cutoff device, then when running into high temperature, semiconductor switch is easily failed, and safety can not be provided for system
Ensure.
Utility model content
The utility model is directed to problem above, there is provided a kind of to be applied to photovoltaic generation with high security and reliability
Rapidly switch off system.
The technical solution of the utility model is：System is rapidly switched off applied to photovoltaic generation, is serially connected with photovoltaic module battle array
In row, including photovoltaic junction box is rapidly switched off, the photovoltaic module array includes some photovoltaic modulies, some photovoltaic modulies
Passed through after being connected in series by conflux/inversion box is delivered to AC network, AC network and conflux/inversion box between be provided with AC distribution
System, concatenation rapidly switches off photovoltaic junction box between the adjacent photovoltaic module, for turning off photovoltaic module；
The alternating-current system includes main switch and secondary lock, the main switch located at AC network and conflux/inversion box between,
The secondary lock includes supply convertor, hand switch and automatic switch, and the automatic switch and hand switch connect power supply respectively
Converter, the supply convertor connection rapidly switch off photovoltaic junction box.
The photovoltaic junction box that rapidly switches off includes normally opened contact one and electromagnetic wire bag one, and the electromagnetic wire bag one connects electricity
Source converter, the moving contact of the normally opened contact one and the static contact of normally opened contact one connect adjacent photovoltaic module respectively.
The photovoltaic junction box that rapidly switches off is integrally manufactured with photovoltaic module, and the photovoltaic module is including electrification component and simultaneously
The bypass diode module being coupled on the electrification component；
The photovoltaic junction box that rapidly switches off includes normally opened contact two and electromagnetic wire bag two, and the normally opened contact two connects respectively
It is connected on adjacent bypass diode module, the electromagnetic wire bag two connects supply convertor.
The photovoltaic junction box that rapidly switches off includes normally opened contact three, electromagnetic wire bag three and normally-closed contact, described normally opened tactile
Point three and normally-closed contact link with electromagnetic wire bag three；
The electromagnetic wire bag three connects supply convertor, the moving contact of the normally opened contact three and the stationary contact of normally opened contact three
Head connects adjacent photovoltaic module respectively, and described photovoltaic module one end connects earth terminal, between the photovoltaic module and earth terminal
Provided with normally-closed contact.
It can also be based between photovoltaic junction box is rapidly switched off in the utility model being serially connected in adjacent photovoltaic module
The voltage class of component concatenates between each two photovoltaic module and rapidly switches off photovoltaic junction box.This component level rapidly switches off light
Volt terminal box belongs to outer and is connected on original photovoltaic module, will not change the structure of original photovoltaic module, be easy to having installed
Existing photovoltaic module is transformed, and on the one hand improves security, on the other hand, it is not necessary to photovoltaic module is integrally replaced,
Cost is saved.
Photovoltaic module array break down needs overhaul or occur major natural disasters cause photovoltaic module array
During damage, rapidly switch off photovoltaic junction box and can realize and rapidly switch off so that adjacent photovoltaic module mutually separates, it is ensured that photovoltaic
The residual voltage of component can drop in safe range within the most short time, ensure the personal safety of maintainer.At main switch
When off-state, supply convertor must not be electric, causes to rapidly switch off the disconnection of terminal box dead electricity.As long as that is whole system
Break down and power off, each photovoltaic module will disconnect, and realize on to greatest extent and linked with power network, when power network because failure is lost
It can also be disconnected rapidly between photovoltaic module after electricity, the residual voltage allowed in very short time in photovoltaic module drops to safety
Scope（Provide that personnel enter in safety margin in 2017NEC690.12 photovoltaic system safety standards, it is desirable to the component electricity that can be touched
Pressure should drop to below 80V in 10 seconds）So personnel enter it is fashionable can just guarantee personal safety, reduce accident.
The situation for using semiconductor switch high temperature failure in the prior art is compared to, electromagnetic switch is used in this case, as long as photovoltaic
Component powers off（Either high temperature power-off or because other reasonses power-off）, electromagnetic switch can quickly make instead in time
Should, it is ensured that personal safety.It is compared to and electromagnetic switch is set between inverter and photovoltaic electrification component in the prior art, this
There is electromagnetic switch in case on the photovoltaic module of each series connection, enable to photovoltaic module separate when power is off, it is ensured that
Residual voltage can reduce rapidly in photovoltaic module, ensure personal safety, and safety and stability is higher.The utility model is on the whole
With the advantages of safe, stability is good.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment one,
Fig. 2 is that the utility model embodiment one rapidly switches off junction box structure schematic diagram,
Fig. 3 is the structural representation of embodiment two in the utility model,
Fig. 4 is that the utility model embodiment two rapidly switches off junction box structure schematic diagram,
Fig. 5 is the structural representation of embodiment three in the utility model,
Fig. 6 is quick light end photovoltaic junction box structural representation in embodiment three in the utility model,
Fig. 7 is prior art construction schematic diagram；
1 is photovoltaic module in figure, and 11 be electrification component, and 12 be bypass diode module, and 2 be inversion box of confluxing, and 3 be exchange
Power network, 4 be alternating-current system, and 41 be main switch, and 42 be secondary lock, and 421 be supply convertor, and 422 be hand switch, and 423 be certainly
Dynamic switch, 5 be to rapidly switch off photovoltaic junction box, and 51 be normally opened contact one, and 52 be electromagnetic wire bag one, and 53 be normally opened contact two, 54
It is electromagnetic wire bag two, 55 be normally opened contact three.56 be electromagnetic wire bag three.57 be normally-closed contact.
Embodiment
The utility model is as shown in figures 1 to 6, a kind of to rapidly switch off system applied to photovoltaic generation, is serially connected with photovoltaic module
In array, including photovoltaic junction box is rapidly switched off, the photovoltaic module array includes some photovoltaic modulies 1, some photovoltaics
Component 1 passed through after being connected in series by conflux/inversion box 2 is delivered to AC network 3, AC network 3 and conflux/inversion box between be provided with
Alternating-current system 4, concatenation rapidly switches off photovoltaic junction box 5 between the adjacent photovoltaic module, for turning off photovoltaic module.
AC network can be electric main net or regional power grid（Electricity inside one transformer platform area or large enterprise
Net）.
Rapidly switching off that photovoltaic junction box can be serially connected between adjacent photovoltaic module can also the voltage based on component etc.
Level concatenation between each two photovoltaic module rapidly switches off photovoltaic junction box.This component level rapidly switches off photovoltaic junction box and belonged to
It is connected on outside on original photovoltaic module, the structure of original photovoltaic module will not be changed, is easy to having installed existing photovoltaic group
Part is transformed, and on the one hand improves security, on the other hand, it is not necessary to integrally replace photovoltaic module, saved cost.
Photovoltaic module array break down needs overhaul or occur major natural disasters cause photovoltaic module array
During damage, rapidly switch off photovoltaic junction box and can realize and rapidly switch off so that adjacent photovoltaic module mutually separates, it is ensured that photovoltaic
The residual voltage of component can drop in safe range within the most short time, ensure the personal safety of maintainer, each or
The setting of each two photovoltaic module part rapidly switches off photovoltaic junction box and enables to residual voltage in adjacent photovoltaic module to reduce rapidly, with
Prior art is compared shown in Fig. 7, and prior art is only provided with main switch confluxing between inversion box and AC network, is damaged in photovoltaic module
Component itself still has higher residual voltage when bad, and security is poor, and this case sets between photovoltaic module and rapidly switches off photovoltaic wiring
Box so that adjacent photovoltaic module mutually separates, it is ensured that the residual voltage of photovoltaic module can drop to safety within the most short time
In the range of, security performance is higher.
The alternating-current system 4 includes main switch 41 and secondary lock 42, and the main switch 41 is located at AC network and/inversion of confluxing
Between case 2, the secondary lock 42 includes supply convertor 421, hand switch 422 and automatic switch 423, the automatic switch 423
Supply convertor 421 is connected respectively with hand switch 422, and the supply convertor connection rapidly switches off photovoltaic junction box.
When main switch is off, supply convertor must not be electric, causes to rapidly switch off the disconnection of terminal box dead electricity.Also
As long as being to say that whole system breaks down to power off, each photovoltaic module will disconnect, and realize on to greatest extent and linked with power network,
It also can rapidly disconnect between photovoltaic module after power network is due to failure dead electricity, allowed in very short time in photovoltaic module
Residual voltage drop to safe range（2017NEC690.12 provide that personnel enter in safety margin in photovoltaic system safety standard,
The component voltage that can be touched is asked to drop to below 80V in 10 seconds）So entering in personnel fashionable can just ensure personal peace
Entirely, accident is reduced.Rapidly switch off photovoltaic junction box and use electromagnetic switch, at high operating temperatures than semiconductor switch more
It is stable, the drawbacks of semiconductor switch fails at high operating temperatures is avoided, stability is more preferable.
Embodiment one
As shown in Figure 1-2, the photovoltaic junction box 5 that rapidly switches off includes normally opened contact 1 and electromagnetic wire bag 1, institute
State electromagnetic wire bag 1 and connect supply convertor 421, the moving contact of the normally opened contact 1 and the static contact of normally opened contact one
Adjacent photovoltaic module is connected respectively.
During photovoltaic module array normal power generation, supply convertor and electromagnetic wire Bao Yijun obtain electric, are associated with electromagnetic wire bag one
Normally opened contact one act, normally opened contact one closes so that each photovoltaic module is connected into photovoltaic module array, realizes generating work(
Can, when the needs that break down overhaul or run into force majeure, and breaking accident occurs, main switch disconnects, supply convertor and electromagnetic wire
A dead electricity is wrapped, normally opened contact one returns to normally open, now the relatively independent disconnection of each photovoltaic module so that photovoltaic module
Residual voltage quickly falls to safe range, and safety guarantee is provided to enter the workmen, fire-fighting first-aid personnel etc. in place.It is this
The system of rapidly switching off belongs to outer and is connected on original photovoltaic module, will not change the structure of original photovoltaic module, be easy to
Existing photovoltaic module is installed to be transformed, on the one hand improves security, on the other hand, it is not necessary to integrally replace photovoltaic module
Change, saved cost.Secondary lock is also provided with main switch, supply convertor is controlled respectively using hand switch and automatic switch,
So photovoltaic module can be just controlled manually when maintainer needs and actively disconnects and being safeguarded.It is so that residual in photovoltaic module
Pressure is rapid to be declined, and is accelerated O＆M maintenance process, is improved operating efficiency.
Embodiment two
As shown in Figure 3-4, it is described to rapidly switch off photovoltaic junction box 5 and photovoltaic module 1 is integrally manufactured, the photovoltaic module 1
Including electrification component 11 and the bypass diode module 12 being parallel on the electrification component；
The photovoltaic junction box 5 that rapidly switches off includes normally opened contact 2 53 and electromagnetic wire bag 2 54, the normally opened contact two
It is connected on adjacent bypass diode module, the electromagnetic wire bag two connects supply convertor.Can further it simplify
Wiring, reduce the volume of whole device, be easily installed and use.
Embodiment three
As seen in figs. 5-6, it is described rapidly switch off photovoltaic junction box 5 include normally opened contact 3 55, electromagnetic wire bag 3 56 and often
Closed contact 57, the normally opened contact 3 55 and normally-closed contact 57 link with electromagnetic wire bag 3 56；
The electromagnetic wire bag three connects supply convertor, the moving contact of the normally opened contact three and the stationary contact of normally opened contact three
Head connects adjacent photovoltaic module respectively, and described photovoltaic module one end connects earth terminal, between the photovoltaic module and earth terminal
Provided with normally-closed contact.When photovoltaic module normal power generation, supply convertor obtain it is electric, electromagnetic wire bag three also electric, normally opened contact three
Acted with normally-closed contact, normally opened contact three closes so that some photovoltaic modulies are connected, while normally-closed contact disconnects so that photovoltaic
Component and earth terminal disconnect, it is ensured that photovoltaic module forms path with AC network, is powered to AC network.When the needs that break down
When overhauling or running into the force majeure breaking accident of generation, main switch disconnects, or can be operated with manual switches manual disconnection, or
It can be disconnected automatically by automatic switch so that supply convertor dead electricity, such electromagnetic wire bag three is also with regard to dead electricity, normally opened contact three
RestPosed with normally-closed contact, i.e., normally opened contact three recovers off-state, and some photovoltaic modulies return to relatively independent shape
State, normally-closed contact return to closure state so that photovoltaic module under separate state and earth terminal form loop, in photovoltaic module
Residual voltage can run through earth terminal export so that the residual voltage of photovoltaic module declines rapidly, with embodiment one and embodiment two
Compare, residual voltage is exported and consumed by earth terminal so that pressure decay rate is faster.Improve security and operating efficiency.
Claims (5)
1. rapidly switching off system applied to photovoltaic generation, it is serially connected with photovoltaic module array, it is characterised in that closed including quick
Disconnected photovoltaic junction box, the photovoltaic module array include some photovoltaic modulies, some photovoltaic modulies be connected in series after through by
Conflux/inversion box is delivered to AC network, AC network and conflux/inversion box between be provided with alternating-current system, adjacent institute
Concatenation rapidly switches off photovoltaic junction box between stating photovoltaic module, for turning off photovoltaic module.
2. according to claim 1 rapidly switch off system applied to photovoltaic generation, it is characterised in that the AC distribution
System includes main switch and secondary lock, the main switch located at AC network and conflux/inversion box between, the secondary lock includes power conversion
Device, hand switch and automatic switch, the automatic switch and hand switch connect supply convertor, the supply convertor respectively
Connection rapidly switches off photovoltaic junction box.
3. according to claim 2 rapidly switch off system applied to photovoltaic generation, it is characterised in that described to rapidly switch off
Photovoltaic junction box includes normally opened contact one and electromagnetic wire bag one, and the electromagnetic wire bag one connects supply convertor, described normally opened tactile
The moving contact of point one and the static contact of normally opened contact one connect adjacent photovoltaic module respectively.
4. according to claim 2 rapidly switch off system applied to photovoltaic generation, it is characterised in that described to rapidly switch off
Photovoltaic junction box is integrally manufactured with photovoltaic module, and the photovoltaic module includes electrification component and is parallel on the electrification component
Bypass diode module；
The photovoltaic junction box that rapidly switches off includes normally opened contact two and electromagnetic wire bag two, and the normally opened contact two is connected to
On adjacent bypass diode module, the electromagnetic wire bag two connects supply convertor.
5. according to claim 2 rapidly switch off system applied to photovoltaic generation, it is characterised in that described to rapidly switch off
Photovoltaic junction box includes normally opened contact three, electromagnetic wire bag three and normally-closed contact, the normally opened contact three and normally-closed contact and electromagnetism
Line bag three links；
The electromagnetic wire bag three connects supply convertor, the moving contact of the normally opened contact three and the static contact of normally opened contact three point
Adjacent photovoltaic module is not connected, and described photovoltaic module one end connects earth terminal, is provided between the photovoltaic module and earth terminal
Normally-closed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720659440.7U CN206759389U (en) | 2017-06-07 | 2017-06-07 | System is rapidly switched off applied to photovoltaic generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720659440.7U CN206759389U (en) | 2017-06-07 | 2017-06-07 | System is rapidly switched off applied to photovoltaic generation |
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| Publication Number | Publication Date |
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| CN206759389U true CN206759389U (en) | 2017-12-15 |
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ID=60622440
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720659440.7U Active CN206759389U (en) | 2017-06-07 | 2017-06-07 | System is rapidly switched off applied to photovoltaic generation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425808A (en) * | 2017-06-07 | 2017-12-01 | 江苏通灵电器股份有限公司 | It is a kind of to rapidly switch off system applied to photovoltaic generation |
| CN109638795A (en) * | 2019-01-16 | 2019-04-16 | 厦门科华恒盛股份有限公司 | String type photovoltaic inverting system emergency stop control method and device |
-
2017
- 2017-06-07 CN CN201720659440.7U patent/CN206759389U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425808A (en) * | 2017-06-07 | 2017-12-01 | 江苏通灵电器股份有限公司 | It is a kind of to rapidly switch off system applied to photovoltaic generation |
| WO2018223631A1 (en) * | 2017-06-07 | 2018-12-13 | 江苏通灵电器股份有限公司 | Rapid shutdown system applied to photovoltaic power generation |
| CN109638795A (en) * | 2019-01-16 | 2019-04-16 | 厦门科华恒盛股份有限公司 | String type photovoltaic inverting system emergency stop control method and device |
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