CN108462465A - One kind can monitor photovoltaic junction box and its working method - Google Patents
One kind can monitor photovoltaic junction box and its working method Download PDFInfo
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- CN108462465A CN108462465A CN201810272347.XA CN201810272347A CN108462465A CN 108462465 A CN108462465 A CN 108462465A CN 201810272347 A CN201810272347 A CN 201810272347A CN 108462465 A CN108462465 A CN 108462465A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 10
- 230000015556 catabolic process Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 101100377706 Escherichia phage T5 A2.2 gene Proteins 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 description 10
- 206010037660 Pyrexia Diseases 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
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- 230000020169 heat generation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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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
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Abstract
One kind can monitor photovoltaic junction box and its working method.It is related to field of photovoltaic power generation more particularly to a kind of intelligent monitoring photovoltaic junction box and its working method.Provide it is a kind of can effectively be reduced when bypass diode damages photovoltaic module power consumption and safety it is good monitor photovoltaic junction box and its working method.One kind can monitor photovoltaic junction box, it is connected in parallel on photovoltaic module, the photovoltaic module includes several photovoltaic cells being connected in series with, including bypass diode component and clamp diode DX, the bypass diode component is parallel on the photovoltaic electrification component, and the clamp diode DX is connected in parallel on the bypass diode component；The present invention greatly facilitates operation management, improves overhaul efficiency.
Description
Technical field
The present invention relates to field of photovoltaic power generation more particularly to a kind of intelligent monitoring photovoltaic junction box and its working methods.
Background technology
As greatly developing for photovoltaic generation, especially distributed power station are in resident, industrial and mining enterprises roof power station it is a large amount of
With to the safety of system, more stringent requirements are proposed.Photovoltaic plant is often made of multigroup power generation module group connection in series-parallel.System
Voltage reaches hundreds of upper kilovolts.And traditional photovoltaic generation module uses common terminal box directly and internal current conductor busbar phase
Connection, inside can not turn off, and voltage and current is will produce as long as having illumination, and installation, operation maintenance personnel and disaster occurs in this
When rescue personnel produce great danger.And the photovoltaic generation module enormous amount due to constituting power station, when blocking
Or user is difficult to find when failure, even and if be found that and be also difficult to navigate to that specifically problem occurs for which module, to O＆M
Management causes prodigious difficulty.On the one hand entire photovoltaic electrification component can be damaged, on the other hand increases entire light
The power consumption for lying prostrate component, easily occurs safety accident.
State Intellectual Property Office 2016-12-21 discloses a utility model patent（205829562 U of CN are used for light
Lie prostrate the freewheeling circuit and terminal box of component）Disclose a kind of freewheeling circuit and terminal box for photovoltaic module.The afterflow electricity
Road includes the continued flow switch (4,5,6) for providing afterflow function, and the freewheeling circuit, which has, is up to 4 milliohms (m Ω) at 25 DEG C
And it is up to the resistance of 7 milliohms (m Ω) at 125 DEG C.Parasitic diode is made to be in best work using cooling device
Make temperature, this makes it possible to reduce the power consumption of parasitic diode at work to reduce heating efficiency.This mode is only capable of dropping
The shell temperature of low diode, the temperature inside diode still do not reduce, and are unfavorable for the steady operation of diode.
Invention content
The present invention can effectively reduce photovoltaic module work(when bypass diode damages in view of the above problems, providing one kind
It consumes and what safety was good monitors photovoltaic junction box and its working method.
The technical scheme is that：One kind can monitor photovoltaic junction box, be connected in parallel on photovoltaic module, the photovoltaic module
Including several photovoltaic cells being connected in series with, including bypass diode component and clamp diode DX, the bypass diode set
Part is parallel on the photovoltaic electrification component, and the clamp diode DX is connected in parallel on the bypass diode component；
The photovoltaic junction box that monitors further includes pulse switch and control circuit board, and one end of the pulse switch is connected to light
It lies prostrate on component, the other end of the pulse switch is connect with the cathode of the clamp diode, the pulse switch and control electricity
Road plate is connected by signal wire, and the control circuit board controls pulse switch break-make.
The bypass diode component includes several bypass diode D1 ~ Dn, several bypass diode series aiding connections,
The clamp diode DX is connected in parallel on the both ends of the bypass diode component of series aiding connection, on each photovoltaic cell
A bypass diode in parallel.
The photovoltaic module includes the photovoltaic cell M1 being sequentially connected in series, photovoltaic cell M2 and photovoltaic cell M3, the bypass
Diode assembly includes bypass diode D1 ~ bypass diode D3；
The upper parallel connection bypass diode D2 of bypass diode D1, the photovoltaic cell M2 in parallel, the light on the photovoltaic cell M1
The anode of the cathode connection bypass diode D2 of parallel connection bypass diode D3, the bypass diode D1 on battery M3 are lied prostrate, it is described
The anode of the cathode connection bypass diode D3 of bypass diode D2, anode and the bypass diode of two pole DX of the clamper
The anode of D1 connects, and the cathode of the clamp diode DX is connect with the cathode of the bypass diode D3, two pole of the clamper
Pulse switch is equipped between the cathode of pipe DX and the cathode of the bypass diode D3；
One end of the control circuit board connects the anode and ground terminal of the bypass diode D1, the control circuit board it is another
One end is connect with the pulse switch, is powered for the control circuit board；
The control circuit board is equipped with detection line, and one end of the detection line is connect with the control circuit board, the detection
The other end of line is connect with the pulse switch, detects the terminal voltage of the pulse switch；
The control circuit board connects the pulse switch by signal wire, and instruction is sent to the pulse switch.
The control circuit board includes power conversion module, radio receiving transmitting module, sensor assembly and central processing unit, institute
Stating sensor assembly can monitor in photovoltaic junction box set on described, including voltage sensor, current sensor and hygrosensor,
The voltage sensor, current sensor are respectively placed on photovoltaic electrification component, and the voltage sensor and the electric current pass
Sensor is connect by signal wire with the central processing unit respectively；
The power conversion module is the MP1584EN chips being integrated on central processing unit, and the radio receiving transmitting module is integrated
CC1101 chips on the central processing unit or HZ3011 chips, the central processing unit are STM32F030F4 processors.
The working method for monitoring photovoltaic junction box described in a kind of claim 2, when photovoltaic cell is not in photovoltaic module
When whole damages and not breakdown bypass diode, work step is as follows：
A1）Corresponding photovoltaic module number can be stored in control circuit board,
A2）The photovoltaic cell of damage corresponds to bypass diode conducting in parallel,
A2.1）Voltage sensor detects photovoltaic component voltage, and when photovoltaic cell breaks down, voltage declines,
A2.2）Temperature sensor transmits temperature signal, if the corresponding bypass diode breakdown of photovoltaic cell, at this time in temperature
It rises,
A3）Voltage, the electric current that control circuit board receives damage assembly unit decline,
A3.1）Voltage after failure compared with the voltage before failure, is calculated voltage fall by control circuit board,
A3.2）Bypass diode or clamp diode conducting, the photovoltaic module normal work of non-failure,
A4）Faulty component numerals and parameter are sent to host computer by control circuit board, and staff is notified to overhaul.
A kind of working method monitoring photovoltaic junction box, when multiple unit damages or two poles of multiple bypasses in photovoltaic module
When pipe is connected, work step is as follows：
B1）Corresponding photovoltaic module number can be stored in control circuit board,
B2）Clamp diode is connected, which is bypassed,
B3）Remaining photovoltaic module continues to generate electricity because clamp diode is formed into a loop.
It, can be manually by host computer to each group when natural calamity occurring or any required personnel enter assembly array scene
Circuit board sends " shutdown " signal in part, then corresponding component output is cut off by pulse switch.
Host computer can read the number of each photovoltaic module by control circuit board in the present invention, in some photovoltaic generation group
The photovoltaic module of the number can be positioned by control circuit board when part failure, when control circuit board sends failure
When information host computer can quick positioning control circuit plate position so that be capable of the photovoltaic group of positioning failure in time when maintenance
Part, when in photovoltaic module photovoltaic cell have block or damage partially or in whole when, control panel can detect in time failure believe
Breath, such as component numerals, operating voltage, component temperature report host computer.Operation management is greatly facilitated, overhaul efficiency is improved.
After having the presence of clamp diode Dx, pulse switch to disconnect, pulse switch both end voltage is clamped at this group
In the difference of part output voltage and Dx conducting voltages, only about 36V or hereinafter, within the scope of the human safety voltage is not needed
The voltage for bearing the power generation of other photovoltaic modulies, reduces the resistance to pressure request to pulse switch, improves the reliability of pulse switch
And the service life.
Pulse switch is used as device for power switching using self-retaining magnetoelectricity switch, and high temperature resistance is good, solves general
The shortcomings that voluntarily puncturing under semiconductor devices high temperature, cause to be unable to reliable turn-off.Meanwhile self-retaining magnetoelectricity switch is only executing
When receive pulse control signal, not needing continued power can be held on or off state for a long time, and usually not power consumption, carries
System effectiveness has been risen, internal power consumption when system normal operation is reduced, it is energy saving.
When the multiple units of some photovoltaic electrification component block or failure or pulse switch damage, utilization is increased
One clamp diode forms new access, it is only necessary to undertake the power consumption of a clamp diode, power consumption is greatly reduced, and reduces
The power consumption of bypass diode, also just reduces heat generation rate so that terminal box will not be bypassed the accumulated heat damage of diode, and extension connects
The service life of wire box, due to small power consumption, general-purpose diode may be used in clamp diode, also avoids Schottky diode
It is reversed it is resistance to force down, the defect that leakage current is big, ensured the stabilization safe operation of terminal box.
It, can be taking human as passing through host computer when natural calamity occurring or any other needs personnel to enter assembly array scene
To control panel send " shutdown " instruction, then control panel can send out shutdown pulse, make pulse switch act thus cutting assembly it is defeated
Go out, has ensured the safety of Field Force.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention,
Fig. 2 is the current trend figure one of the present invention,
Fig. 3 is the current trend figure two of the present invention,
Fig. 4 is the use state reference chart of the present invention,
Fig. 5 is the optimal enforcement mode structural schematic diagram of the present invention,
Fig. 6 is the optimal enforcement mode current trend figure one of the present invention,
Fig. 7 is the optimal enforcement mode current trend figure two of the present invention,
Fig. 8 is the optimal enforcement mode use state reference chart of the present invention,
Dotted arrow is current trend in figure.
Specific implementation mode
One kind can monitor photovoltaic junction box to the present invention as shown in figures 1-8, be connected in parallel on photovoltaic module, the photovoltaic module packet
Include several photovoltaic cells being connected in series with（M1~Mn）, it includes two pole of bypass diode component and clamper that can monitor photovoltaic junction box
Pipe DX, the bypass diode component are parallel on the photovoltaic electrification component, and the clamp diode DX is connected in parallel on the side
On the diode assembly of road；When photovoltaic electrification component blocks or when failure, is formed newly using an increased clamp diode
Access, it is only necessary to undertake the power consumption of a clamp diode, power consumption is greatly reduced, reduce bypass diode component work(
Consumption, also just reduces heat generation rate so that terminal box will not be bypassed the accumulated heat damage of diode assembly, extend the use of terminal box
Service life may be used general-purpose diode as clamp diode, it is reversed also to avoid Schottky diode because power consumption reduces
It is resistance to force down, the defect that leakage current is big, ensured the stabilization safe operation of terminal box.
The photovoltaic junction box that monitors further includes pulse switch and control circuit board, one end difference of the pulse switch
Connection photovoltaic module and bypass diode component, the other end of the pulse switch are connect with the cathode of the clamp diode,
The pulse switch is connect with control circuit board by signal wire, and the control circuit board controls pulse switch break-make.Work as pulse
The clamp diode continues as string formation afterflow when switch disconnection so that should be by between pulse switch and other photovoltaic modulies
The access of formation transfers, using access is formed between clamp diode and other photovoltaic modulies, do not influencing other photovoltaic modulies hair
While electric so that terminal voltage clamper the leading in this component output voltage and clamp diode at the pulse switch both ends of disconnection
The difference for the pressure that is powered（About 36V or so）, that is to say, that when pulse switch disconnects, original electric energy output loop disconnects, then from
Clamp diode exports, and in this way after pulse switch disconnection, pulse switch both ends need not bear the power generation of other photovoltaic modulies
Voltage, that is, by the voltage clamping at pulse switch both ends on lower voltage level（36V or so）, it is in the safety of human body
In voltage range, the resistance to pressure request to pulse switch is reduced.
If because sunlight blocked, in the case of the damage of photovoltaic module failure or pulse switch, this clamp diode
It can play the role of bypass, and due to the clamping action of the clamp diode so that the power consumption on bypass diode can be apparent
It reduces, power consumption is about the 1/3 of conventional electrical connectors when especially occurring seriously to block, and reduces junction box temperature, improving can
By property.
Using pulse switch（Self-retaining magnetoelectricity switchs）As device for power switching, high temperature resistance is good, solves one
As the shortcomings that voluntarily puncturing, cause to be unable to reliable turn-off under semiconductor devices high temperature.Meanwhile self-retaining magnetoelectricity switch is only being held
Receive pulse control signal when row, and do not need continued power to be held on for a long time or off state, does not consume usually
Electricity improves system effectiveness, reduces internal power consumption when system normal operation, energy saving.
Control circuit board detects the terminal voltage at pulse switch both ends by detection line, when the end for detecting pulse switch both ends
When voltage is close, control circuit board just can determine that pulse switch is connected successfully, when detecting pulse switch opening state
Under terminal voltage it is not close when, then can judge that pulse switch is opened abnormal at this time, can pass through at this time according to information of voltage
Control circuit board sends a signal to host computer, prompts staff's maintenance.That is when pulse switch generation event in terminal box
When barrier, it can judge whether pulse switch breaks down, and pass through corresponding control circuit by detecting pulse switch both end voltage
The number of plate reports host computer and staff in time, searches fault point convenient for staff and carries out maintenance replacement in time.
Control circuit board can detect the voltage condition that photovoltaic module exports at work, be controlled when electric voltage exception reduces
Circuit board can also send a signal to host computer in time, so that host computer notifies staff to overhaul in time.
The bypass diode component includes several bypass diodes, several bypass diode series aiding connections, described
Clamp diode DX is connected in parallel on the concatenated bypass diode both ends, a bypass in parallel on each photovoltaic cell
Diode.
When photovoltaic cell blocks or damages, corresponding bypass diode conducting, by the corresponding photovoltaic for blocking or damaging
Cell bypass so that other photovoltaic cells in same photovoltaic module are working properly, prevent the photovoltaic cell both ends of damage from being formed
High voltage causes the photovoltaic cell for blocking or damaging to be damaged because of overheat.When multiple photovoltaic cells are blocked or damaged in component
Bad when, clamp diode conducting so that entire photovoltaic module is bypassed, and is not influenced and other concatenated photovoltaic groups of the photovoltaic module
The working condition of part.So that should transfer to use two pole of clamper by the access formed between pulse switch and other photovoltaic modulies
Access is formed between pipe and other photovoltaic modulies.That is when some assembly unit blocks or failure, corresponding side
Road diode opens afterflow, and being not this corresponding unit influences the work of other components and unit.Meanwhile it also protecting certainly
Body not lose caused by overvoltage or overheat by bigger.And when in some component multiple units block or when failure, two pole of clamper
Pipe is connected so that and multiple diodes convince fever by patient analysis and become only clamp diode fever in conventional electrical connectors, and power consumption greatly reduces,
Improve system effectiveness.
If because of individual diode itself punch through damage, because the voltage and current of other components is forced through, can cause into
One step fever the shortcomings that leading to more major break down, clamper protection is provided to damage diode by clamp diode, avoid accident into
One step expands.
Due to the presence of clamp diode so that the terminal voltage clamper at pulse switch both ends is in this component output voltage and pincers
The difference of the conducting voltage of position diode（About 36V or following）, that is to say, that when pulse switch disconnects, original electric energy exports back
Road disconnects, then is exported from clamp diode, and in this way after pulse switch disconnection, pulse switch both ends need not bear other light
The voltage for lying prostrate component power generation, reduces the resistance to pressure request to pulse switch, pulse switch is protected not damaged by affected by high.
By photovoltaic module that three photovoltaic cells are constituted and it is corresponding for, the operation principle of this case is described in detail.It is described
Photovoltaic module includes the photovoltaic cell M1 being sequentially connected in series, photovoltaic cell M2 and photovoltaic cell M3, the bypass diode component packet
Include bypass diode D1 ~ bypass diode D3；
The upper parallel connection bypass diode D2 of bypass diode D1, the photovoltaic cell M2 in parallel, the light on the photovoltaic cell M1
The anode of the cathode connection bypass diode D2 of parallel connection bypass diode D3, the bypass diode D1 on battery M3 are lied prostrate, it is described
The anode of the cathode connection bypass diode D3 of bypass diode D2, anode and the bypass diode of two pole DX of the clamper
The anode of D1 connects, and the cathode of the clamp diode DX is connect with the cathode of the bypass diode D3, two pole of the clamper
Pulse switch is equipped between the cathode of pipe DX and the cathode of the bypass diode D3；
The both ends of each photovoltaic cell bypass diode in parallel, and three bypass diode bypass diode sets in series
Part, in a bypass diode component both ends clamp diode in parallel, the clamper two if three photovoltaic cells all block
Pole pipe is connected, and power consumption is only the power consumption that single clamp diode forward voltage drop is formed, far smaller than in the prior art only with
The power consumption that bypass diode is formed.
Assuming that the electric current flowed through is 8A, the forward voltage drop of each diode is 0.5V, while in bypass diode component
There are three for bypass diode, then when not having clamp diode, terminal box will undertake the loss of 0.5V*8A*3=12W, and
When a clamp diode in parallel in bypass diode component, it is only necessary to undertake the loss of a clamp diode i.e.
The loss of 0.5V*8A=4W, power consumption are greatly reduced, and reduce the power consumption of bypass diode, also just reduce heating efficiency so that
Terminal box will not be bypassed the accumulated heat damage of diode, extend the service life of terminal box, simultaneously because lower power consumption, can adopt
Used general-purpose diode as clamp diode, also avoid Schottky diode it is reversed it is resistance to force down, the defect that leakage current is big,
The stabilization safe operation of terminal box is ensured.
Assuming that the electric current flowed through is 8A, the forward voltage drop of each diode is 0.5V, while in bypass diode component
There are three for bypass diode, when occurring, one of photovoltaic cell blocks and just corresponding bypass diode damages
When breakdown, at this point, the bypass diode of breakdown is equivalent to a low resistance（About 100 Ω of resistance value）Due to depositing for clamp diode
, the voltage at the bypass diode both ends punctured at this time is clamped at lower value, by taking photovoltaic electrification component is 32V components as an example,
The voltage at the bypass diode both ends of breakdown is clamped at 24V or so, and power consumption is 5.76W at this time, still much lower than existing skill
Power consumption in art.So that terminal box will not be bypassed the accumulated heat damage of diode, extend the service life of terminal box, simultaneously because
Use general-purpose diode, also avoid Schottky diode it is reversed it is resistance to force down, the defect that leakage current is big, ensured terminal box
Stabilization safe operation.
One end of the control circuit board is separately connected the anode and ground terminal of the bypass diode D1, the control electricity
The other end of road plate is connect with the pulse switch, is powered for the control circuit board；The control circuit board is equipped with detection
Line, one end of the detection line are connect with the control circuit board, and the other end of the detection line is connect with the pulse switch,
Detect the terminal voltage of the pulse switch；The control circuit board connects the pulse switch by signal wire, gives the pulse
Switch sends instruction.Control circuit board detects the terminal voltage at pulse switch both ends by detection line.During pulse switch is opened,
When detecting that the terminal voltage at pulse switch both ends is close, control circuit board just can determine pulse switch success, pulse switch
Under off state, pulse switch upper end is detected（The namely cathode of clamp diode）The voltage at end should be close with its conducting voltage
（About 0.5 ~ 0.7V）, then it can judge that pulse switch shutdown at this time is abnormal according to information of voltage, it otherwise can criterion pulse switch
Fail normal turn-off, host computer can be sent a signal to by control circuit board at this time, prompts staff's maintenance.
The voltage condition that photovoltaic module exports at work can be then detected when pulse switch is in the conduction state, work as electricity
Control circuit board can also send a signal to host computer in time when reduce off-flavor often reduces, so that host computer notifies work in time
Make personnel's maintenance.
The control circuit board includes power conversion module, radio receiving transmitting module, sensor assembly and central processing unit, institute
Stating sensor assembly can monitor in photovoltaic junction box set on described, including voltage sensor, current sensor and hygrosensor,
The voltage sensor, current sensor are respectively placed on photovoltaic electrification component, and the voltage sensor and the electric current pass
Sensor is connect by signal wire with the central processing unit respectively；The power conversion module is to be integrated on central processing unit
MP1584EN chips, the radio receiving transmitting module are the CC1101 chips being integrated on the central processing unit or HZ3011 cores
Piece, the central processing unit are STM32F030F4 processors.Component numerals first in host computer meeting read control circuit plate,
When control circuit board sends fault message host computer can quick positioning control circuit plate position, that is to say, that with control electricity
The number of road plate positions corresponding component so that is capable of the photovoltaic cell of timely positioning failure when maintenance, improves overhaul efficiency.It is logical
Voltage sensor, current sensor and the temperature sensor crossed in control circuit board detect the state of photovoltaic module, so that
Control circuit board can judge whether photovoltaic module is normal, facilitate user maintenance management, increase working efficiency, improve response speed
Degree.
The working method for monitoring photovoltaic junction box described in a kind of claim 2, when photovoltaic cell is not in photovoltaic module
When whole damages and not breakdown bypass diode, work step is as follows：
A1）Corresponding photovoltaic module number can be stored in control circuit board, when one of control circuit board send information to it is upper
Host computer can judge rapidly the position of the photovoltaic module when machine, so as to reduce maintenance positioning time, promote overhaul efficiency.
A2）The photovoltaic cell of damage corresponds to bypass diode conducting in parallel,
A2.1）Voltage sensor detects photovoltaic component voltage, and when photovoltaic cell breaks down, voltage declines,
A2.2）Temperature sensor transmits temperature signal, if the corresponding bypass diode breakdown of photovoltaic cell, at this time in temperature
It rises,
A3）Voltage, the electric current that control circuit board receives damage assembly unit decline,
A3.1）Voltage after failure compared with the voltage before failure, is calculated voltage fall by control circuit board,
A3.2）Bypass diode or clamp diode conducting, the photovoltaic module normal work of non-failure, clamp diode conducting,
So that multiple diodes open fever and become only clamp diode fever in conventional electrical connectors, power consumption greatly reduces, and improves system
System efficiency.
A4）Faulty component numerals and parameter are sent to host computer by control circuit board, and staff is notified to overhaul；It can
Manually by host computer, into each component, circuit board sends " shutdown " signal, then corresponding component output is cut off by pulse switch.
Support personnel's safety and reduction causality loss.It can judge whether pulse switch occurs event by detecting pulse switch both end voltage
Barrier, and host computer and staff are reported by the number of corresponding control circuit board in time, search failure convenient for staff
Point simultaneously carries out maintenance replacement in time.
The working method for monitoring photovoltaic junction box described in a kind of claim 2, when multiple unit damages in photovoltaic module
When bad or multiple bypass diode conductings, work step is as follows：
B1）Corresponding photovoltaic module number can be stored in control circuit board,
B2）Clamp diode is connected, which is bypassed,
B3）Remaining photovoltaic module continues to generate electricity because clamp diode is formed into a loop,
It, can be manually by host computer into each component when natural calamity occurring or any required personnel enter assembly array scene
Circuit board sends " shutdown " signal, then corresponding component output is cut off by pulse switch.Support personnel's safety and reduction accident damage
It loses.
Claims (7)
1. one kind can monitor photovoltaic junction box, it is connected in parallel on photovoltaic module, the photovoltaic module includes several light being connected in series with
Lie prostrate battery, which is characterized in that including bypass diode component and clamp diode DX, the bypass diode component is parallel to institute
It states on photovoltaic electrification component, the clamp diode DX is connected in parallel on the bypass diode component；
The photovoltaic junction box that monitors further includes pulse switch and control circuit board, and one end of the pulse switch is connected to light
It lies prostrate on component, the other end of the pulse switch is connect with the cathode of the clamp diode, the pulse switch and control electricity
Road plate is connected by signal wire, and the control circuit board controls pulse switch break-make.
2. one kind according to claim 1 can monitor photovoltaic junction box, which is characterized in that the bypass diode component packet
Several bypass diode D1 ~ Dn, several bypass diode series aiding connections are included, the clamp diode DX is connected in parallel on string in the same direction
The both ends of the bypass diode component of connection, a bypass diode in parallel on each photovoltaic cell.
3. one kind according to claim 2 can monitor photovoltaic junction box, which is characterized in that the photovoltaic module includes successively
Concatenated photovoltaic cell M1, photovoltaic cell M2 and photovoltaic cell M3, the bypass diode component include bypass diode D1 ~ side
Road diode D3；
The upper parallel connection bypass diode D2 of bypass diode D1, the photovoltaic cell M2 in parallel, the light on the photovoltaic cell M1
The anode of the cathode connection bypass diode D2 of parallel connection bypass diode D3, the bypass diode D1 on battery M3 are lied prostrate, it is described
The anode of the cathode connection bypass diode D3 of bypass diode D2, anode and the bypass diode of two pole DX of the clamper
The anode of D1 connects, and the cathode of the clamp diode DX is connect with the cathode of the bypass diode D3, two pole of the clamper
Pulse switch is equipped between the cathode of pipe DX and the cathode of the bypass diode D3；
One end of the control circuit board connects the anode and ground terminal of the bypass diode D1, the control circuit board it is another
One end is connect with the pulse switch, is powered for the control circuit board；
The control circuit board is equipped with detection line, and one end of the detection line is connect with the control circuit board, the detection
The other end of line is connect with the pulse switch, detects the terminal voltage of the pulse switch；
The control circuit board connects the pulse switch by signal wire, and instruction is sent to the pulse switch.
4. photovoltaic junction box can be monitored according to any described one kind of claim 1-3, which is characterized in that the control circuit board
Including power conversion module, radio receiving transmitting module, sensor assembly and central processing unit, the sensor assembly can described in
It monitors in photovoltaic junction box, including voltage sensor, current sensor and hygrosensor, the voltage sensor, electric current pass
Sensor is respectively placed on photovoltaic electrification component, and the voltage sensor and the current sensor pass through signal wire and institute respectively
State central processing unit connection；
The power conversion module is the MP1584EN chips being integrated on central processing unit, and the radio receiving transmitting module is integrated
CC1101 chips on the central processing unit or HZ3011 chips, the central processing unit are STM32F030F4 processors.
5. the working method for monitoring photovoltaic junction box described in a kind of claim 2, which is characterized in that when light in photovoltaic module
When volt battery does not damage all and bypass diode is not breakdown, work step is as follows：
A1）Corresponding photovoltaic module number can be stored in control circuit board,
A2）The photovoltaic cell of damage corresponds to bypass diode conducting in parallel,
A2.1）Voltage sensor detects photovoltaic component voltage, and when photovoltaic cell breaks down, voltage declines,
A2.2）Temperature sensor transmits temperature signal, if the corresponding bypass diode breakdown of photovoltaic cell, at this time in temperature
It rises,
A3）Voltage, the electric current that control circuit board receives damage assembly unit decline,
A3.1）Voltage after failure compared with the voltage before failure, is calculated voltage fall by control circuit board,
A3.2）Bypass diode or clamp diode conducting, the photovoltaic module normal work of non-failure,
A4）Faulty component numerals and parameter are sent to host computer by control circuit board, and staff is notified to overhaul.
6. the working method for monitoring photovoltaic junction box described in a kind of claim 2, which is characterized in that when more in photovoltaic module
When a unit damage or multiple bypass diodes are connected, work step is as follows：
B1）Corresponding photovoltaic module number can be stored in control circuit board,
B2）Clamp diode is connected, which is bypassed,
B3）Remaining photovoltaic module continues to generate electricity because clamp diode is formed into a loop.
7. a kind of working method monitoring photovoltaic junction box according to claim 5 or 6, which is characterized in that work as generation
It, can the manually circuit board transmission into each component by host computer when natural calamity or any required personnel enter assembly array scene
Cut-off signals, pulse switch disconnect, and corresponding component output is cut off by pulse switch.
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