CN109193589A - A kind of photovoltaic system safety features and method - Google Patents
A kind of photovoltaic system safety features and method Download PDFInfo
- Publication number
- CN109193589A CN109193589A CN201811202657.0A CN201811202657A CN109193589A CN 109193589 A CN109193589 A CN 109193589A CN 201811202657 A CN201811202657 A CN 201811202657A CN 109193589 A CN109193589 A CN 109193589A
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- China
- Prior art keywords
- switching
- photovoltaic module
- power connector
- photovoltaic
- protector
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
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Abstract
The invention discloses a kind of photovoltaic system safety features and methods, wherein the equipment includes photovoltaic module, the photovoltaic module string being made of multiple photovoltaic modulies, the protector being connected with photovoltaic module string, the inverter being connected by protector with photovoltaic module string, the switching off device being connected with the photovoltaic module in photovoltaic module string, it is connected in series between switching off device and is connected with protector, wherein: protector, for being powered for switching off device, and electric arc generation is detected whether, if having, it then cuts off and the electric energy of switching off device is supplied, to disconnect the connection in photovoltaic module string between photovoltaic module.Above-mentioned technical proposal disclosed in the present application; protector is when having detected electric arc generation; it then cuts off and the electric energy of switching off device is supplied; to disconnect the connection between photovoltaic module; so that almost no-voltage exists on direct current cables; and then eliminate between direct current cables and direct current cables electric arc over the ground, to reduce electric arc risk and high pressure risk.
Description
Technical field
The present invention relates to parallel network power generation technology field, more specifically to a kind of photovoltaic safety features and
Method.
Background technique
Due to the reproducibility and spatter property of solar energy, parallel network power generation technology is grown rapidly.Common photovoltaic
System is that multiple photovoltaic modulies connect to form photovoltaic module string, is then concatenated photovoltaic module into inverter, by photovoltaic module
The direct current issued is converted to alternating current and realizes grid-connected.
In view of the photovoltaic module being serially connected will form high direct voltage, and this high pressure will lead to Personal Risk and fire
Therefore accident, then requires inverter to have anti-to reduce danger and accident brought by the high direct voltage of photovoltaic module formation
The function of arc protection, that is, the operation of shutdown inverter at once when detecting electric arc.Specifically it may refer to Fig. 1,
It illustrates the structural schematic diagram of the existing photovoltaic system with arc protection function, may include photovoltaic module, arc protector,
Inverter, arc protector are internally provided with arc detector, and there are two types of arc protection methods for the structure: one is arc-detections
Device is connected with inverter, and the operation of inverter is turned off when finding electric arc, DC current is made to be reduced to 0；One is in arc protection
Relay is set in device, which is mounted on photovoltaic module and is formed by between photovoltaic module string and inverter, in discovery electricity
Relay is disconnected when arc, so that inverter is out of service.Above-mentioned arc protection can make inverter out of service, to eliminate photovoltaic
Direct serial arc between component string and inverter, but be high pressure because photovoltaic module still has output voltage and connects, so, still
There are the relevant danger of high pressure, i.e., above-mentioned arc protection can not eliminate between the direct current cables being connected with photovoltaic module and direct current
The electric arc of cable over the ground.
In conclusion how to eliminate between direct current cables and direct current cables electric arc over the ground, with reduce electric arc risk and
High pressure risk is current those skilled in the art technical problem urgently to be resolved.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of photovoltaic system safety features and methods, to eliminate direct current
Between cable and direct current cables electric arc over the ground, to lower electric arc risk and high pressure risk.
To achieve the goals above, the invention provides the following technical scheme:
A kind of photovoltaic system safety features, including photovoltaic module, the photovoltaic group being made of multiple photovoltaic modulies
Part string, the protector being connected with the photovoltaic module string are connected by the protector with the photovoltaic module string
Inverter, the switching off device that is connected with the photovoltaic module in the photovoltaic module string, be connected in series simultaneously between the switching off device
It is connected with the protector, in which:
The protector for being powered for the switching off device, and has detected whether electric arc generation, if so, then
It cuts off and the electric energy of the switching off device is supplied, to disconnect the connection in the photovoltaic module string between the photovoltaic module.
Preferably, the protector includes:
It is connected between the photovoltaic module string and the inverter, for detecting whether the arc-detection for thering is electric arc to generate
Device；
The switching off device switch of power supply output being connected with the arc detector and the switching off device；
It is connected with the switching off device switch of power supply output and passes through to exchange to be spaced apart and is connected with power grid, for will be received
AC conversion be direct current, with the switching off device power supply being powered for the switching off device.
Preferably, further includes:
It is arranged on the protector, for controlling the switching off device after the shutdown instruction for receiving user's transmission
The shutdown button that switch of power supply output disconnects.
Preferably, the switching off device includes power connector, power connection, switch, and the power connector includes input power
Connector, output power connector, the switch be arranged between the input power connector and the output power connector and with institute
Power connection is stated to be connected, in which:
The power connector is connected with the photovoltaic module in the photovoltaic module string；
It is connected in series between the switching off device by the power connection, and passes through the power connection and the switching off device
Switch of power supply output is connected with the switching off device power supply.
It preferably, include multiple groups power connector in the switching off device, power connector described in every group connects including input power
Head and output power connector, and between the input power connector and the output power connector in power connector described in every group
It is provided with the switch being connected with the power connection.
Preferably, the switch in the switching off device is specially relay or semiconductor switch.
Preferably, the switching off device is specially cable switching off device, in which:
The output of a photovoltaic module in input power connector and the photovoltaic module string in the cable switching off device
End is connected, output power connector is connected with the output end of another photovoltaic module.
Preferably, the switching off device is specially component switching off device, in which:
A photovoltaic module is wherein in input power connector in the component switching off device and the photovoltaic module string
Another output end for the photovoltaic module that one output end is connected, output power connector is connect with the input power connector is connected.
A kind of photovoltaic system method for security protection is set applied to photovoltaic system safeguard protection as described in any one of the above embodiments
It is standby, comprising:
Protector has detected whether electric arc generation；
If so, then the electric energy of switching off device is supplied in the protector cutting, to disconnect photovoltaic group in photovoltaic module string
Connection between part.
Preferably, before the protector is cut off to the electric energy supply of switching off device, further includes:
Exchange is spaced apart and/or turns off button and receives the shutdown instruction that user sends, and it is out of service to control switching off device power supply.
The present invention provides a kind of photovoltaic system safety features and method, wherein the equipment include photovoltaic module, by
The photovoltaic module string of multiple photovoltaic module compositions, passes through protector and light at the protector being connected with photovoltaic module string
The inverter that component string is connected, the switching off device being connected with the photovoltaic module in photovoltaic module string are lied prostrate, is connected in series simultaneously between switching off device
It is connected with protector, in which: protector for being powered for switching off device, and has detected whether electric arc generation, if
Have, then cuts off and the electric energy of switching off device is supplied, to disconnect the connection in photovoltaic module string between photovoltaic module.
Above-mentioned technical proposal disclosed in the present application is connected using switching off device with the photovoltaic module in photovoltaic module string, and
It is connected in series between these switching off device, and is connected with protector, be powered by protector for it, and safeguard protection
Device is also connected with photovoltaic module string and inverter, whether has electric arc generation for real-time detection, if having detected electric arc generation,
It cuts off and the electric energy of switching off device is supplied, to disconnect the connection between photovoltaic module, that is, disconnect the output voltage of photovoltaic module, so that
The voltage exported on each photovoltaic module can not connect as high pressure, so that almost no-voltage exists on direct current cables, because
This, then can eliminate between direct current cables and direct current cables electric arc over the ground, and then can then reduce electric arc risk and high pressure
Risk.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the existing photovoltaic system with arc protection function；
Fig. 2 is a kind of knot of the first specific embodiment of photovoltaic system safety features provided in an embodiment of the present invention
Structure schematic diagram；
Fig. 3 is the structural schematic diagram inside protector provided in an embodiment of the present invention；
Fig. 4 is the connection schematic diagram of switching off device power supply and power grid provided in an embodiment of the present invention；
Fig. 5 is the flow chart for the specific embodiment that progress component provided in an embodiment of the present invention rapidly switches off；
Fig. 6 is the flow chart for the another specific embodiment that progress component provided in an embodiment of the present invention rapidly switches off；
Fig. 7 is the structural schematic diagram of the specific embodiment inside switching off device provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the another specific embodiment inside switching off device provided in an embodiment of the present invention；
Connection schematic diagram of the Fig. 9 between switching off device corresponding with Fig. 8 provided in an embodiment of the present invention；
Figure 10 is a kind of second of specific embodiment of photovoltaic system safety features provided in an embodiment of the present invention
Structural schematic diagram；
Figure 11 is a kind of the third specific embodiment of photovoltaic system safety features provided in an embodiment of the present invention
Structural schematic diagram；
Figure 12 is a kind of 4th kind of specific embodiment of photovoltaic system safety features provided in an embodiment of the present invention
Structural schematic diagram；
Figure 13 is a kind of flow chart of photovoltaic system method for security protection provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 2 is referred to, it illustrates the first of a kind of photovoltaic system safety features provided in an embodiment of the present invention
The structural schematic diagram of specific embodiment, may include photovoltaic module 11, the photovoltaic module string 1 being made of multiple photovoltaic modulies 11,
The protector 2 being connected with photovoltaic module string 1, the inverter 3 and light that are connected by protector 2 with photovoltaic module string 1
The switching off device 4 that the photovoltaic module 11 in component string 1 is connected is lied prostrate, is connected in series between switching off device 4 and is connected with protector 2,
In:
Protector 2 for being powered for switching off device 4, and has detected whether electric arc generation, if so, then cutting pair
The electric energy of switching off device 4 is supplied, to disconnect the connection in photovoltaic module string 1 between photovoltaic module 11.
The photovoltaic module that photovoltaic system safety features may include photovoltaic module 11, be made of multiple photovoltaic modulies 11
String 1, the inverter 3 being connected with photovoltaic module string 1, wherein inverter 3 is used to turn in direct current caused by photovoltaic module string 1
It is changed to alternating current, it is grid-connected to realize.
In addition to this, photovoltaic system safety features further include switching off device 4, protector 2, wherein switching off device 4 with
Photovoltaic module 11 in photovoltaic module string 1 is connected, and is serially connected between switching off device 4, i.e. photovoltaic group in photovoltaic module string 1
It is to be connected in series with each other by switching off device 4 between part 11；Protector 2 respectively with photovoltaic module string 1, inverter 3,
The switching off device 4 being connected in series is connected, i.e., photovoltaic module string 1 is connected by protector 2 with inverter 3.
Protector 2 is used to be powered for switching off device 4, and whether has electric arc generation for real-time detection: if not having
It detects electric arc, then can be continuously switching off device 4 and supply electric energy, so that switching off device 4 is in closed state, so that photovoltaic group
The voltage that part 11 is exported can be normally output on direct current cables, and be transported in power grid by inverter 3；If having detected
Electric arc generates, then cuts off the electric energy supply to switching off device 4 immediately, and switching off device 4 then can be in disconnection shape because no electric energy is supplied
State.Since switching off device 4 is in an off state, then it will disconnect the connection in photovoltaic module string 1 between photovoltaic module 11, make
The connection relationship being serially connected can not be reconstructed between photovoltaic module 11 by obtaining.The voltage exported in view of each photovoltaic module 11
It is relatively low, and there is no constitute the connection relationship being serially connected therefore to be connected with photovoltaic module 11 between photovoltaic module 11
Direct current cables on existing voltage will be relatively low, even almost no-voltage exists, and can thus eliminate direct current
Between cable and direct current cables electric arc over the ground, to can then reduce risk relevant to high pressure.
Above-mentioned technical proposal disclosed in the present application is connected using switching off device with the photovoltaic module in photovoltaic module string, and
It is connected in series between these switching off device, and is connected with protector, be powered by protector for it, and safeguard protection
Device is also connected with photovoltaic module string and inverter, whether has electric arc generation for real-time detection, if having detected electric arc generation,
It cuts off and the electric energy of switching off device is supplied, to disconnect the connection between photovoltaic module, that is, disconnect the output voltage of photovoltaic module, so that
The voltage exported on each photovoltaic module can not connect as high pressure, so that almost no-voltage exists on direct current cables, because
This, then can eliminate between direct current cables and direct current cables electric arc over the ground, and then can then reduce electric arc risk and high pressure
Risk.
As shown in Figure 3 and Figure 4, wherein the structure that Fig. 3 shows inside protector provided in an embodiment of the present invention is shown
It is intended to, Fig. 4 shows the connection schematic diagram of switching off device power supply and power grid provided in an embodiment of the present invention.The embodiment of the present invention provides
A kind of photovoltaic system safety features, protector 2 may include:
It is connected between photovoltaic module string 1 and inverter 3, for detecting whether the arc detector 21 for thering is electric arc to generate；
The switching off device switch of power supply output 22 being connected with arc detector 21 and switching off device 4；
It is connected with switching off device switch of power supply output 22 and 5 is connected with power grid, by exchanging to be spaced apart for will be received
AC conversion is direct current, with the switching off device power supply 23 being powered for switching off device 4.
Protector 2 may include arc detector 21, switching off device switch of power supply output 22, switching off device power supply 23.Its
In, arc detector 21 is connected between photovoltaic module string 1 and inverter 3, switching off device switch of power supply output 22 and arc-detection
Device 21, switching off device 4 are connected, and switching off device power supply 23 is connected with switching off device switch of power supply output 22 and is spaced apart 5 and power grid by exchanging
It is connected.It should be noted that V+ connecting line shown in Fig. 4, V- connecting line indicate the voltage output of switching off device 4, L connecting line, N connect
What wiring then indicated is the connecting line being connected with power grid.
When exchange is spaced apart 5 in the closure state, switching off device power supply 23 obtains alternating current from power grid, and alternating current is converted
For direct current, in order to provide electric energy for switching off device 4, wherein as long as the direct current that switching off device power supply 23 is exported can drive
Switching off device 4 works normally, typically the low-voltage DC of 5-30V.Arc detector 21 in protector 2 is used
Whether there is electric arc generation in real-time detection, if detecting electric arc, the disconnection of switching off device switch of power supply output 22 is controlled, to be cut to
The electric energy of switching off device 4 is supplied, to cut off the connection in photovoltaic module string 1 between photovoltaic module 11.
This discovery electric arc and cutting can not need protector 2 to the mode that 4 electric energy of switching off device is supplied and persistently send out
It send signal of communication to switching off device 4, therefore, the communications cost of photovoltaic system safety features can be reduced, and because not needing
Therefore the control cut off by signal of communication can then reduce the interference of the factors such as installation process, external environment, thus
The stability of photovoltaic system safety features operation can be improved.
In addition, exchange, which is spaced apart 5, can receive the shutdown instruction of user's transmission (i.e. when needing to carry out component to rapidly switch off
User hand dynamic circuit breaker is opened exchange and is spaced apart 5), and then, exchange is spaced apart 5 and is in an off state, at this point, switching off device power supply 23 then can not be from
Power grid obtains electric energy (i.e. switching off device power supply 23 can stop working), and correspondingly, protector 2 then can not just supply for switching off device 4
Electric energy is answered, the output voltage of photovoltaic module 11 can be thus disconnected, so as to reduce the voltage on direct current cables, and then is dropped
Low risk relevant to high pressure, provides safety guarantee for user.Above-mentioned detailed process may refer to Fig. 5, and it illustrates the present invention
The flow chart for the specific embodiment that the progress component that embodiment provides rapidly switches off.
A kind of photovoltaic system safety features provided in an embodiment of the present invention can also include:
It is arranged on protector 2, is defeated for controlling switching off device power supply after the shutdown instruction for receiving user's transmission
The shutdown button that switch 22 disconnects out.
It can also include shutdown button in photovoltaic system safety features, which can be set in safeguard protection
On device 2, and it is connected with switching off device switch of power supply output 22.
When needing to carry out component to rapidly switch off, user, can also be to pass other than being spaced apart 5 transmissions shutdown instruction to exchange
Disconnected button sends shutdown instruction (i.e. user is manually pressed by shutdown button), disconnects switching off device switch of power supply output using shutdown button
22, to cut off the electric energy supply to switching off device 4, so that the connection in photovoltaic module string 1 between photovoltaic module 11 is disconnected, to reduce
Voltage on direct current cables to reduce risk relevant to high pressure, and provides safety guarantee for user.Above-mentioned detailed process can
With referring to Fig. 6, it illustrates the flow charts for the another specific embodiment that progress component provided in an embodiment of the present invention rapidly switches off.
As shown in fig. 7, it illustrates the structures of the specific embodiment inside switching off device provided in an embodiment of the present invention to show
It is intended to.A kind of photovoltaic system safety features provided in an embodiment of the present invention, switching off device 4 may include power connector, power supply
Connector, switch 401, power connector include input power connector, output power connector, and switch 401 is arranged in input power connector
It is connected between output power connector and with power connection, in which:
Power connector is connected with the photovoltaic module 11 in photovoltaic module string 1；
Be connected in series between switching off device 4 by power connection, and by power connection and switching off device switch of power supply output 22 with
Switching off device power supply 23 is connected.
The inside of switching off device 4 may include power connector, power connection, switch 401.
Wherein, power connector includes input power connector, output power connector, as shown in fig. 7, IN indicates that input power connects
Head, OUT indicate output power connector, photovoltaic module in input power connector IN, output power connector OUT and photovoltaic module string 1
11 output end is connected；Power connection is 2 core wires, as shown in fig. 7, V`+, V`- indicate power connection, is passed through between switching off device 4
Power connection V`+, V`- are successively connected in series, then, V`+ power connection (V`- power connection) and end using first switching off device 4
The V`- power connection (V`+ power connection) of one switching off device 4 of tail, and pass through the switching off device in protector 2 shown in Fig. 3
Switch of power supply output 22 is connected with switching off device power supply 23, to be that switching off device 4 is powered using switching off device power supply 23；Switching off device 4
Interior switch 401 is arranged between input power connector IN and output power connector OUT and passes through switch control module and power supply
Connector V`+, V`- are connected.
Switching off device power supply 23 inside protector 2 can obtain electric energy from power grid, and switching off device power supply exports
In the closure state, then the electric energy that protector 2 is exported can then reach power connection V`+, V`- to switch 22, and make
Switch 401 in switching off device 4 is in closed state, at this point, input power connector IN is connected with output power connector OUT, then
So that may be constructed concatenated connection relationship between photovoltaic module 11 in photovoltaic module string 1, so that photovoltaic system can be with
It generates electricity, and realizes grid-connected；When arc detector 21 detects electric arc, then it can control the pass inside protector 2
Disconnected device switch of power supply output 22 is in an off state, at this point, just not having voltage stream on power connection V`+, V`- in switching off device 4
It crosses, can not then form access between input power connector IN and output power connector OUT, correspondingly, the light in photovoltaic module string 1
Concatenated connection relationship can not be then constituted between volt component 11, therefore, then the voltage on direct current cables can be reduced, to eliminate
Between direct current cables and direct current cables electric arc over the ground.
By arc detector 21 inside protector 2, switching off device power supply 23, switching off device switch of power supply output 22,
And the realization of switch 401 inside switching off device 4 disconnects the mode of the output voltage of photovoltaic module 11 not only automatically after electric arc generation
It can thoroughly eliminate between direct current cables and direct current cables electric arc over the ground, but also photovoltaic system can be reduced and protected safely
The arc extinguishing cost of equipment is protected, and improves the stability of photovoltaic system safety features.
As shown in Figure 8 and Figure 9, wherein Fig. 8 shows another specific reality inside switching off device provided in an embodiment of the present invention
The structural schematic diagram of example is applied, Fig. 9 shows the connection signal between switching off device corresponding with Fig. 8 provided in an embodiment of the present invention
Figure.A kind of photovoltaic system safety features provided in an embodiment of the present invention may include multiple groups power connector in switching off device 4,
Every group of power connector includes input power connector and output power connector, and the input power connector in every group of power connector with
The switch 401 being connected with power connection is provided between output power connector.
It may include multiple groups power connector in switching off device 4, every group of power connector may each comprise input power connector and defeated
Power connector out, and be provided between the input power connector and output power connector in every group of power connector and connect with power supply
The connected switch 401 of head, these switches 401 can be connected by switch control module with same group of power connection.Wherein, often
Group power connector can be connected with the photovoltaic module 11 in a string of photovoltaic module strings 1, such multiple groups power connector
It is connected with the photovoltaic module 11 in more optical crosstalks volt component string 1, this structure design of switching off device 4 not only may be implemented by one
Group power connection controls multiple groups photovoltaic module string 1, but also can reduce the usage quantity of switching off device 4, so as to
The structure for simplifying photovoltaic system safety features, reduces the design and use cost of the equipment, and the equipment can be improved
Arc extinguishing efficiency.
Certainly, it can also be connected by same root power cable between switching off device 4, and only in first switching off device 4
Power connection is arranged in one end and one end of one, end switching off device 4, to be protected using set power connection and safety
Shield device 2 is connected.
Wherein, Fig. 8 and switching off device illustrated in fig. 94 include two groups of power connectors: first group of power connector includes: input
Power connector IN1 and output power connector OUT1；Second group of power connector includes: that input power connector IN2 and output power connect
Head OUT2, and is connected in series between switching off device shown in Fig. 94 by same root power cable, and first group of power connector can be with
First optical crosstalk lies prostrate the photovoltaic module 11 in component string 1 and is connected, and second group of power connector can then lie prostrate in component string 1 with the second optical crosstalk
Photovoltaic module 11 be connected, to realize the control that simultaneously two optical crosstalks are lied prostrate with component string 1 by one group of power cable.
A kind of photovoltaic system safety features provided in an embodiment of the present invention, switch 401 in switching off device 4 specifically can be with
For relay or semiconductor switch.
Switch 401 set by the inside of switching off device 4 is specifically as follows relay or semiconductor switch: when for relay
When, then it does not need special ON-OFF control circuit is arranged in switch control module relay is controlled；When for semiconductor
When switch, then need to be arranged in switch control module ON-OFF control circuit corresponding with semiconductor switch, it is split to realize
Close 401 control.
When switch 401 inside switching off device 4 is semiconductor switch, then it is specifically as follows MOS (Metal Oxide
Semiconductor, metal-oxide semiconductor (MOS)) pipe, IGBT (Insulated Gate Bipolar Transistor, insulation
Grid bipolar transistor) etc..
0 and Figure 11 referring to Figure 1, wherein Figure 10 shows a kind of photovoltaic system provided in an embodiment of the present invention and protects safely
The structural schematic diagram of second of specific embodiment of equipment is protected, Figure 11 shows a kind of photovoltaic system provided in an embodiment of the present invention
The structural schematic diagram of the third specific embodiment of safety features.A kind of photovoltaic system safety provided in an embodiment of the present invention
Equipment is protected, switching off device 4 is specially cable switching off device 41, in which:
Input power connector in cable switching off device 41 is connected with the output end of a photovoltaic module 11 in photovoltaic module string 1,
Output power connector is connected with the output end of another photovoltaic module 11.
The switching off device 4 being arranged in photovoltaic system safety features is specifically as follows cable switching off device 41, which closes
The input power connector of disconnected device 41 is connected with the output end of a photovoltaic module 11 in photovoltaic module string 1, output power connector and light
Lie prostrate the output end of next photovoltaic module 11 (for the photovoltaic module 11 that input power connector is connected) in component string 1
It is connected, i.e., is serially connected photovoltaic module 11 using the power connector of cable switching off device 41, to constitute photovoltaic module string 1.
When inside cable switching off device 41 comprising one group of power connector (referring to Fig. 7), cable switching off device 41 then can be to one
Group photovoltaic module string 1 is controlled, and specific connection is as shown in Figure 10, the two neighboring photovoltaic module 11 in photovoltaic module string 1
Between cable switching off device 41 is set, be connected using power connector cable switching off device 41 inside with photovoltaic module 11, and utilization is electric
Power connection (or power cable) inside cable switching off device 41 is serially connected, and then, utilizes power connection and protector 2
It is connected, electric energy supply is carried out to switching off device by safety governor, and detecting that electric arc generates or exchange is spaced apart 5 receptions
After the shutdown instruction sent to user, cuts off and the electric energy of cable switching off device 41 is supplied.
When including multiple groups power connector inside cable switching off device 41, cable switching off device 41 then can be to multiple groups photovoltaic module
String 1 is controlled.As shown in figure 11, it illustrates include two groups of power connectors inside cable switching off device 41 for specific connection
(referring to Fig. 8), cable switching off device 41 can control two groups of photovoltaic module strings 1, the photovoltaic in first group of photovoltaic module string 1
Component 11 is connected with first group of power connector that 41 inside of cable switching off device is included, the photovoltaic in second group of photovoltaic module string 1
Component 11 is connected with second group of power connector that 41 inside of cable switching off device is included, and utilizes the electricity inside cable switching off device 41
Source connector (or power cable) is serially connected, and then, is connected using power connection with protector 2.
It should be noted that specifically connecting when the power connector that 41 inside of cable switching off device is included is greater than two groups
The relationship of connecing can refer to Figure 11, and details are not described herein.
Referring to Figure 12, it illustrates the 4th kind of a kind of photovoltaic system safety features provided in an embodiment of the present invention
The structural schematic diagram of specific embodiment.A kind of photovoltaic system safety features provided in an embodiment of the present invention, switching off device 4 are specific
For component switching off device 42, in which:
A wherein output end for a photovoltaic module 11 in input power connector and photovoltaic module string 1 in component switching off device 42
It is connected, another output end for the photovoltaic module 11 that output power connector is connect with input power connector is connected.
The switching off device 4 being arranged in photovoltaic system safety features is specifically as follows component switching off device 42, which closes
The input power connector of disconnected device 42 in photovoltaic module string 1 photovoltaic module 11 wherein an output end is connected, output power connects
Another output end for the photovoltaic module 11 that head is connect with input power connector is connected, i.e., a component switching off device 42 connects one
Photovoltaic module 11, and be serially connected between component switching off device 42 by power connection (or power cable), then, pass through
Power connection is connected with protector 2.
Wherein, Figure 12 is shown inside component switching off device 42 the case where including one group of power connector (referring to Fig. 7), works as packet
When the connector of power containing multiple groups, specific connection relationship can refer to Figure 12 and Figure 11, and details are not described herein.
The embodiment of the invention also provides a kind of photovoltaic system method for security protection, are applied to any of the above-described kind of photovoltaic system
Safety features, as shown in figure 13, it illustrates a kind of photovoltaic system method for security protection provided in an embodiment of the present invention
Flow chart may include:
S11: protector has detected whether electric arc generation, if so, thening follow the steps S12.
Whether there is electric arc in the protector real-time detection photovoltaic system being arranged in photovoltaic system safety features
It generates, if having detected electric arc generation, thens follow the steps S12.
S12: protector, which is cut off, supplies the electric energy of switching off device, to disconnect in photovoltaic module string between photovoltaic module
Connection.
If having detected electric arc generation, protector cuts off the electric energy supply to switching off device immediately, at this point, switching off device
It can be then in an off state because non-transformer is supplied, therefore, then will disconnect the connection in photovoltaic module string between photovoltaic module, make
The connection relationship being serially connected can not be reconstructed between photovoltaic module by obtaining, it can the output voltage between photovoltaic module is disconnected,
So as to reduce existing voltage on the direct current cables being connected with photovoltaic module, so can eliminate between direct current cables, with
And the electric arc of direct current cables over the ground, to reduce electric arc risk and high pressure risk.
If not detected electric arc generation, protector is continuously switching off device and is powered, so that photovoltaic module
The voltage exported can be normally output on direct current cables, and be transported in power grid by inverter.If having detected electric arc
It generates,
A kind of photovoltaic system method for security protection provided in an embodiment of the present invention is cut off in protector to switching off device
Before electric energy supply, can also include:
Exchange is spaced apart and/or turns off button and receives the shutdown instruction that user sends, and it is out of service to control switching off device power supply.
When needing to carry out component to rapidly switch off, then it can be spaced apart from user to exchange and/shutdown button sends shutdown and refers to
It enables.
Exchange is spaced apart and/or turns off button after receiving the instruction of shutdown transmitted by user, inside protector
Switching off device power supply then can be out of service so that the switching off device switch of power supply output inside protector is in an off state,
It is supplied to cut off protector to the electric energy of switching off device, to reduce the voltage on direct current cables, and then reduction and high pressure phase
The risk of pass provides safety guarantee for user.
The explanation of relevant portion refers to this hair in a kind of photovoltaic system method for security protection provided in an embodiment of the present invention
The detailed description of corresponding part in a kind of photovoltaic system safety features that bright embodiment provides, details are not described herein.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic.?
Do not have in the case where more limiting, the element limited by sentence "including a ...", it is not excluded that including the element
There is also other identical elements in process, method, article or equipment.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
Claims (10)
1. a kind of photovoltaic system safety features, which is characterized in that formed including photovoltaic module, by multiple photovoltaic modulies
Photovoltaic module string, be connected with the photovoltaic module string protector, by the protector and the photovoltaic group
Part string connected inverter, the switching off device that is connected with the photovoltaic module in the photovoltaic module string, between the switching off device
It is connected in series and is connected with the protector, in which:
The protector for being powered for the switching off device, and has detected whether electric arc generation, if so, then cutting off
Electric energy supply to the switching off device, to disconnect the connection in the photovoltaic module string between the photovoltaic module.
2. photovoltaic system safety features according to claim 1, which is characterized in that the protector includes:
It is connected between the photovoltaic module string and the inverter, for detecting whether the arc detector for thering is electric arc to generate；
The switching off device switch of power supply output being connected with the arc detector and the switching off device；
It is connected with the switching off device switch of power supply output and passes through to exchange to be spaced apart and is connected with power grid, for by received friendship
Galvanic electricity is converted into direct current, with the switching off device power supply being powered for the switching off device.
3. photovoltaic system safety features according to claim 2, which is characterized in that further include:
It is arranged on the protector, for controlling the switching off device power supply after the shutdown instruction for receiving user's transmission
The shutdown button that output switch disconnects.
4. photovoltaic system safety features according to claim 2, which is characterized in that the switching off device includes that power connects
Head, power connection, switch, the power connector include input power connector, output power connector, and the switch is arranged described
It is connected between input power connector and the output power connector and with the power connection, in which:
The power connector is connected with the photovoltaic module in the photovoltaic module string；
It is connected in series between the switching off device by the power connection, and passes through the power connection and the switching off device power supply
Output switch is connected with the switching off device power supply.
5. photovoltaic system safety features according to claim 4, which is characterized in that include multiple groups in the switching off device
Power connector, power connector described in every group include input power connector and output power connector, and power connector described in every group
The switch being connected with the power connection is provided between the interior input power connector and the output power connector.
6. photovoltaic system safety features according to claim 4, which is characterized in that the switch tool in the switching off device
Body is relay or semiconductor switch.
7. according to the described in any item photovoltaic system safety features of claim 4 to 6, which is characterized in that the switching off device
Specially cable switching off device, in which:
The output end phase of input power connector and a photovoltaic module in the photovoltaic module string in the cable switching off device
Even, output power connector is connected with the output end of another photovoltaic module.
8. according to the described in any item photovoltaic system safety features of claim 4 to 6, which is characterized in that the switching off device
Specially component switching off device, in which:
Input power connector in the component switching off device in the photovoltaic module string photovoltaic module it is wherein one defeated
Another output end for the photovoltaic module that outlet is connected, output power connector is connect with the input power connector is connected.
9. a kind of photovoltaic system method for security protection, which is characterized in that be applied to light as claimed in any one of claims 1 to 8
Volt system safety features, comprising:
Protector has detected whether electric arc generation；
If so, then the electric energy of switching off device is supplied in protector cutting, with disconnect in photovoltaic module string photovoltaic module it
Between connection.
10. photovoltaic system method for security protection according to claim 9, which is characterized in that cut in the protector
Before the disconnected electric energy supply to switching off device, further includes:
Exchange is spaced apart and/or turns off button and receives the shutdown instruction that user sends, and it is out of service to control switching off device power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202657.0A CN109193589A (en) | 2018-10-16 | 2018-10-16 | A kind of photovoltaic system safety features and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811202657.0A CN109193589A (en) | 2018-10-16 | 2018-10-16 | A kind of photovoltaic system safety features and method |
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| CN201811202657.0A Pending CN109193589A (en) | 2018-10-16 | 2018-10-16 | A kind of photovoltaic system safety features and method |
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Application publication date: 20190111 |