CN207283498U - Monitoring and cutoff device for photovoltaic module - Google Patents
Monitoring and cutoff device for photovoltaic module Download PDFInfo
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- CN207283498U CN207283498U CN201721345004.9U CN201721345004U CN207283498U CN 207283498 U CN207283498 U CN 207283498U CN 201721345004 U CN201721345004 U CN 201721345004U CN 207283498 U CN207283498 U CN 207283498U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model is mainly concerned with monitoring and cutoff device for photovoltaic module.The the first shut-off unit and the second shut-off unit arranged on the circuit of photovoltaic module electrode is coupled in；The be triggered part trigger condition of shut-off of second shut-off unit is at least different from the first shut-off unit and is triggered the trigger condition of shut-off；To ensure that photovoltaic module at least can give open circuit when meeting with the failure specified by one of first, second shut-off unit.Multiple photovoltaic modulies are serially connected in battery string formation, bypass diode or by-pass switch are there also is provided on one group of circuit for being coupled in the positive and negative electrode of photovoltaic module, when any one photovoltaic module interrupts road from battery string formation, the photovoltaic module being switched off is bypassed by the bypass diode or the by-pass switch that is switched on of forward conduction.Ensure that arbitrary photovoltaic cell controllable in time can be turned off in the case where potential emergency situation occurs.
Description
Technical field
The utility model is mainly concerned with battery cell monitoring technical field, exactly, is related in photovoltaic generating system
The scheme of the target component of photovoltaic cell is monitored, uses shut-off framework simple in structure, it is ensured that arbitrary photovoltaic cell is occurring
Controllable in time it can be turned off under potential emergency situation.
Background technology
Photovoltaic generating system becomes the new industry of the traditional chemical industry energy of substitution.By taking photovoltaic generation as an example, whole direct current system
System network containing multiple-limb, with raising of the owner to power supply quality and power supply reliability requirement, the safe and reliable fortune of straight-flow system
Row more shows important to the reliability and stability of power system power supply.Straight-flow system mainly includes charging equipment, storage battery group
Formed with stable-pressure device, inverter and DC network.The quantity of the photovoltaic module array of photovoltaic plant and its decentralized
Regional Distribution is extremely huge, and centralized power station is particularly evident, and the important means for improving DC network reliability is exactly to whole
The distribution battery of network is monitored on-line and earthing wire-selecting, so as to find the various defects of straight-flow system, photovoltaic in time
Component is the object that owner needs key monitoring, prevents the failure of straight-flow system from occurring in advance.
The important embodiment of the busbar of photovoltaic module in photovoltaic plant or the reliability of branch and security is：To be made great efforts
Avoid the excess temperature of solar panel.Currently how to be handled when crossing temperature abnormality and occurring abnormal still without satisfied solution.When certain
A little power equipments or cable when two electrodes between generate sufficiently high voltage when, possible starting arc.Voltage may draw
The ionization that interelectrode gas is usually air is played, plasma gradually forms, and electric current can flow between the electrodes.This
The plasma of sample, which may heat, is increased to thousands of degrees Celsius so that representational bright electric arc occurs.Such high temperature temperature
Degree may cause system failure, even system or neighbouring device is caught fire in extreme circumstances.According to the most power stations of statistics
Fire is as caused by direct-current arc, therefore turns off solar panel on fire in time and is very important.Even if the temperature of battery is inclined
Difference temporarily may also be not enough to cause fire, but photovoltaic property can be caused to change, because temperature can change solar panel most
High-power point.Similar to the monitoring for performing the temperature of photovoltaic cell, power, voltage, electric current etc., be ensure normal battery operation and
Maintain the precondition of whole electricity generation system normal operation.
Utility model content
In a nonrestrictive alternative embodiment, the application mainly disclose a kind of monitoring for photovoltaic module and
Cutoff device, including：The the first shut-off unit and the second shut-off unit arranged on the circuit of photovoltaic module electrode is coupled in；The
The be triggered part trigger condition of shut-off of two shut-off units is at least different from the first shut-off unit and is triggered the trigger condition of shut-off；
To ensure that photovoltaic module at least can give open circuit when meeting with the failure specified by one of first, second shut-off unit.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
First shut-off unit includes power semiconductor switch, breaker, magnetic switch.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
Second shut-off unit includes Temp.-control fuse, temperature detect switch (TDS).
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
Photovoltaic module is also configured with temperature sensor and supporting processor for monitoring real time temperature；
When the temperature of photovoltaic module exceedes predetermined threshold value, the first shut-off of processor control unit is turned off.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
Photovoltaic module is also configured with voltage sensor and current sensor for monitoring voltage, electric current.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
First rated temperature range that can work normally of shut-off unit is triggered the temperature of shut-off less than the second shut-off unit
Degree.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
The trigger condition that second shut-off unit is different from the shut-off that is triggered of the first shut-off unit includes at least：Second shut-off
Unit is easier rapidly to be cut off when meeting with naked light.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
On the circuit of positive electrode for being coupled in photovoltaic module while it is disposed with first, second shut-off unit；Or
On the circuit of negative electrode for being coupled in photovoltaic module while it is disposed with first, second shut-off unit.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
On the circuit of positive electrode for being coupled in photovoltaic module while it is disposed with one of first, second shut-off unit；With
And
It is another in first, second shut-off unit being coupled on the circuit of negative electrode of photovoltaic module while being disposed with
Person.
Above-mentioned monitoring and cutoff device for photovoltaic module, wherein：
Multiple photovoltaic modulies are serially connected in battery string formation；
Bypass diode or by-pass switch are there also is provided on one group of circuit for being coupled in the positive and negative electrode of photovoltaic module；
When any one photovoltaic module interrupts road from battery string formation by forward conduction bypass diode or be switched on
By-pass switch is bypassed the photovoltaic module being switched off.
Brief description of the drawings
To enable purpose and feature and advantage above more easy-to-understand, embodiment is done with reference to attached drawing hereinafter
Detailed explaination, read it is described further below and with reference to the following drawings after, the feature and advantage of the application will be evident.
Fig. 1 is the system architecture being monitored in the series-connected battery string for providing high voltage to single battery.
Fig. 2 is that the shut-off unit used and the circuit diagram of by-pass unit are monitored to single battery.
Fig. 3 is the circuit diagram that the different types of shut-off unit used is monitored to single battery.
Fig. 4 is the circuit diagram that the power switch used and insurance fuse are monitored to single battery.
Fig. 5 is that the schematic diagram that the bypass diode used changes power switch into is monitored to single battery.
Embodiment
Below in conjunction with each embodiment, the embodiment of the utility model is clearly completely illustrated, described implementation
Example is only the utility model embodiment not all with the embodiment being described herein used in explanation, based on such embodiment, ability
The scheme that the technical staff in domain is obtained on the premise of creative work is not made belongs to the protection model of the utility model
Enclose.
In field of photovoltaic power generation, photovoltaic module or photovoltaic cell are the core components to generate electricity, and solar panel is in mainstream
The direction of technology is divided into single crystal silicon solar cell, polycrystalline silicon solar cell, non-crystal silicon solar cell etc., large-scale centralized light
The substantial amounts for the battery component that overhead utility uses, the quantity for the battery component that small-sized distributed residents small hydropower station uses
It is relatively fewer.Silion cell is up to the service life of more than 20 years in the service life that the field requires, thus to the real-time of battery and
Durability monitoring is essential.Many inside and outside factors can all cause the generating efficiency of photovoltaic module low, photovoltaic
Manufacturing variation or installation difference or the factor such as shadow occlusion or maximum power tracing collocation degree between component itself can all cause
Transfer efficiency reduces.By taking typical shadow occlusion as an example, if fruit part photovoltaic module is by cloud or building or the shadow of the trees or dirt
After being blocked etc. analogue, this members will be become to load and no longer produce electricl energy by power supply, and heat is occurring for photovoltaic module
The serious position local temperature of spot effect may be higher, and some is even more than 150 DEG C, causes component regional area to burn or formed
The permanent damages such as blackening, solder joint thawing, encapsulating material aging, glass rupture, corrosion, to photovoltaic module long-term safety and
Reliability causes hidden danger greatly.Photovoltaic plant/system urgent problem to be solved is exactly：Can in real time or periodically it see
The working status of each piece of mounted photovoltaic battery panel is examined, can be to the excess temperature of battery, overvoltage, overcurrent and terminal short circuit and electric arc
The abnormal conditions such as failure carry out early warning, this takes the battery being abnormal arranges similar to active safety shut-off or other meet an urgent need
Apply and be particularly important.Either centralization or photovoltaic power station, the running parameter data based on collection photovoltaic module
It is very necessary for judging and identifying those there are the component of potential problems.Those skilled in the art, which also knows, utilizes group
Various types of data that part extracts within the unit interval establish data model, are understand battery behavior in depth extremely important
Real information, such as：The silicon materials of battery belong to the material easily to decay, and attenuation degree is the electricity for judging different suppliers
The foundation of pond quality and quality.Data mining analysis, real time monitoring are provided, remote diagnosis, make high-quality power station owner and the investor
Can comprehensive parameter monitoring grasped power station operating condition, be all based on component rapid in time.
Referring to Fig. 1, after the voltage superposition that the multistage photovoltaic module PV1-PVN of tandem type is each exported by it is total have it is higher
The voltage of potential is supplied to inverter INVT, inverter INVT to collect the multistage respective outputs of photovoltaic module PV1-PVN of series connection
Power carries out inversion of the direct current to alternating current, and N is greater than 1 natural number.Photovoltaic module array is photovoltaic generating system from light
The basis of electric energy conversion can be arrived.The battery strings group installed in photovoltaic module array is shown in figure, on battery strings group：Each
Battery strings group is that the photovoltaic modulies concatenation being connected in series with each other by multiple is formed, photovoltaic module can also be substituted for fuel cell or
The DC power supplies such as chemical cell.The main function of battery strings group is embodied in：Although each battery strings group is by multiple photovoltaic modulies
Form and multiple photovoltaic modulies of inside be series connection relation, but multiple and different battery strings groups be relation in parallel and to
Inverter INVT provides electric energy.Every piece of photovoltaic cell or photovoltaic module PV are each equipped with performing monitoring and shut-off in this application
Device, specifically for example：The electric energy that first order photovoltaic module PV1 is produced is determined by first monitoring and cutoff device MO1
Whether it is added in whole battery string formation, the electric energy that second level photovoltaic module PV2 is produced is by second monitoring and cutoff device MO2
In the whole battery string formation that decides whether to be added to, to analogize, until the electric energy that N grades of photovoltaic module PVN is produced is by N grades
Monitoring and cutoff device MON are come in the whole battery string formation that decides whether to be added to.On monitoring and cutoff device main function,
It is explained as follows for example：Unacceptable failure occurs for N grades of photovoltaic module PVN, once N grades of monitoring and cutoff device
MON monitors this failure, then monitoring and cutoff device MON should be selected N grades of photovoltaic module PVN from whole battery pack
Removed in string；Conversely, when this failure vanishes then select N grades of photovoltaic module PVN to be concatenated or is linked into again again entirely
In battery string formation, recover its function as energy supply source.The type of failure is in already previously mentioned mistake：Serious shade hides
Gear, the temperature of photovoltaic module continue too low, voltage and current abnormal parameters etc. beyond output power caused by tolerance range, aging
Hidden danger.
Referring to Fig. 1, in an optional but nonessential embodiment, it is assumed that be serially connected with the first order inside some battery strings group
The rest may be inferred by photovoltaic module PV1, second level photovoltaic module PV2 ... to N grades of photovoltaic module PVN.It can then learn individually
The total tandem voltage being capable of providing in some battery strings group is about to be equal to：The voltage that first order photovoltaic module PV1 is exported
V1The voltage V exported plus the photovoltaic module PV2 of the second level2, then also need to the photovoltaic module PV3 institutes along with the third level
The voltage V of output3..., and so on, the voltage V that N grades of photovoltaic module PVN is exported is added to alwaysN, total tandem voltage
Result of calculation be equal to V1+V2+…VN.The tandem that the voltage exported on busbar LA-LB by multistage photovoltaic module is superimposed
Voltage is fed to similar to grid-connected again after the power equipments such as header box or inverter confluence and inversion.Monitoring and cutoff device are all
Processor 100 is configured with, for example：Monitoring and cutoff device MON are configured with some processor 100, and processor 100 also carries periphery
Peripheral hardware, the species of peripheral hardware sets as needed.Conventional peripheral hardware hardware is at least wanted can be by the voltage and electricity of photovoltaic module
Stream, power and temperature are acquired to a series of related specified target component information such as generated energy, if voltage parameter is by electricity
Pressure sensor, current parameters are gathered by current sensor, temperature parameter by the peripheral hardware such as temperature inductor hardware.The kind of peripheral hardware hardware
Class more multiprocessor can the obtain and relevant parameter species of photovoltaic module is also more, but cost can increase, this needs to roll over
Inner feelings.Target component can also be included by environment monitor come the surrounding enviroment factor data residing for the photovoltaic module that detects,
Such as：Environment temperature and humidity, wind speed, intensity of illumination and air pressure etc., environment monitor are data collector or peripheral hardware hardware
One kind, arc-detection instrument are also.
Referring to Fig. 2, the specific topological structure of monitoring and cutoff device above is illustrated.Illustrate in Fig. 1：The first order is supervised
Control and cutoff device MO1, the second level monitoring and cutoff device MO2 ... the rest may be inferred, until N grade monitoring and shut-off fill
MON etc. is put to be connected in series by concatenating line.In the link that multilevel monitor and cutoff device MO1-MON are connected in series, relation
For：Second output terminal of any previous stage monitoring and cutoff device is coupled to neighboring later stage monitoring and the first of cutoff device defeated
Outlet, so that, total tandem voltage that battery strings group can provide is equal among it multilevel monitor and cutoff device MO1-MON each
Output voltage final superposition value.Connection relation is in more detail：The first order monitors and the second output terminal of cutoff device MO1
NO2It is coupled to neighboring later stage namely the first output terminal NO of second level monitoring and cutoff device MO21, and in addition, the second level
Monitoring and the second output terminal NO of cutoff device MO22It is coupled to neighboring later stage namely third level monitoring and cutoff device MO3
First output terminal NO1, and so on, N-1 grades of monitoring and the second output terminal NO of cutoff device2Be coupled to it is adjacent after
Level-one monitors and the first output terminal NO of cutoff device MON1.On whole transmission concatenation line, by multilevel monitor and cutoff device
The tandem voltage that the voltage superposition that MO1 to MON is each exported obtains is fed to energy collection device, and tandem voltage is by busbar
LA-LB is conveyed.Wherein the first output terminal NO of first order monitoring and cutoff device MO11Be coupled to busbar LA, end it is last
N grades of monitoring and the second output terminal NO of cutoff device MON2It is coupled to busbar LB.
Referring to Fig. 2, photovoltaic module PVM is performed using monitoring and cutoff device MOM and is linked into multilevel monitor and cutoff device
Switching in the link being connected in series, or perform the switching opened from link down.Adjacent photovoltaic module PVN is using monitoring and closes
Disconnected device MON performs the switching being linked into link, or performs the switching opened from link down.And monitoring and cutoff device
The second output terminal NO of MOM2It is coupled to adjacent rear stage monitoring and the first output terminal NO of cutoff device MON1.Pay attention to here
M and N be natural number more than 1.
Referring to Fig. 2, the first input end IN of monitoring and cutoff device MOM1It is connected to cathode and the monitoring of photovoltaic module PVM
And the second input terminal IN of cutoff device MOM2It is connected to the anode of photovoltaic module PVM.In optional but nonrestrictive implementation
In example, the first output terminal NO of monitoring and cutoff device MOM1With the second output terminal NO2Corresponding photovoltaic module PVM productions can be exported
Raw power and voltage, it is found that the first output terminal NO1With the second output terminal NO2Between be also associated with the diode D of bypass, it is cloudy
Pole is connected to the first output terminal NO1And anode is connected to the second output terminal NO2.If photovoltaic module PVM is monitored and cutoff device MOM
It is linked into link that then diode is reverse biased, if instead photovoltaic module PVM is monitored and cutoff device MOM is from link
Then diode forward is disconnected to turn on.In addition monitoring and cutoff device MON topological structure also substantially with monitoring and cutoff device MOM
It is similar.
Referring to Fig. 2, the first shut-off unit 110 is disposed with the circuit of cathode for being coupled in photovoltaic module PVM, it belongs to
Monitoring and the core element of cutoff device MOM.The temperature of photovoltaic module exceedes temperature threshold, voltage not in voltage specified range
Or electric current is not in the range of nominal current, realtime power less than rated power etc., belongs to failure for a long time.Monitoring and cutoff device
The processor 100 of MOM meets with the failure specified by peripheral hardware hardware monitoring to photovoltaic module PVM, actively will go to trigger and control
System is turned off the first shut-off unit 110, thus the photovoltaic module PVM for avoiding this abnormal influence in whole battery strings group it is remaining
Under other assemblies normal operation；Or first shut-off unit 110 connect after trouble shooting and again access component again
Into battery strings group.Similar, the first shut-off unit 110 is disposed with the circuit of anode for being coupled in photovoltaic module PVN, together
Sample can also serve the same role.The electronic component or module that first shut-off unit 110 uses are, for example, that power semiconductor is opened
Close device：Typically there are bipolar transistor BJT, mos field effect transistor metal-oxide-semiconductor, thyristor, gate pole
Cutoff thyristor GTO, MOS cutoff thyristor MTO and emitter turn-off thyristor GTO, integrated gate commutated thyristor GCT,
Insulated gate bipolar transistor IGBT etc..Breaker or magnetic switch/magnetic switch, relay etc. are the first shut-off units 110
Other options.The high low logic level signal of processor output is control off/on to the first shut-off unit 110 in a word
Mode, pay attention to it is recursive be turned off and connect, rather than after disposable shut-off it is irreversible.
Referring to Fig. 2, in the topological structure of monitoring and cutoff device MOM：First shut-off unit 110 is coupling in the first input
Hold IN1With the first output terminal NO1Between, alternatively, the first shut-off unit 110 is coupling in the second input terminal IN2With the second output terminal
NO2Between.In the topological structure of monitoring and cutoff device MON：First shut-off unit 110 is coupling in the second input terminal IN2With
Two output terminal NO2Between, or first shut-off unit 110 be coupling in first input end IN1With the first output terminal NO1Between.Exist in a word
On position relationship：Or the first shut-off unit 110 is coupling in the anode and the second output terminal NO of component2Between or be coupling in group
The cathode of part and the first output terminal NO1Between.
Referring to Fig. 3, relative to the embodiment of Fig. 2, slightly improve.Mainly in monitoring and the topology knot of cutoff device MOM
In structure：First shut-off unit 110 and second turns off unit 112, and both are coupling in first input end IN at the same time1With the first output terminal
NO1Between, alternatively, the first shut-off unit 110 and second turns off unit 112, both are coupling in the second input terminal IN at the same time2With second
Output terminal NO2Between.Notice that the first shut-off unit 110 and second turns off both positions of unit 112 and can mutually exchange.
Referring to Fig. 3, relative to the embodiment of Fig. 2, the topology knot for being also mainly embodied in monitoring and cutoff device MON is improved
In structure：First shut-off unit 110 is coupling in the second input terminal IN2With the second output terminal NO2Between, but the second shut-off unit 112
It is coupling in first input end IN1With the first output terminal NO1Between.Notice that the first shut-off unit 110 and second turns off 112 liang of unit
The position of person can mutually be exchanged.
Referring to Fig. 3, the second shut-off unit 112 and first turns off 110 difference of unit：Second shut-off unit 112 is triggered
The part trigger condition of shut-off（Trigger Conditions）At least be different from first shut-off unit 110 be triggered shut-off touch
Clockwork spring part.By taking photovoltaic module PVM as an example, when its experience excess temperature, overcurrent or low current, overvoltage or low pressure, power is too low, generation is former
Hinder electric arc when exception, processor 100 can go the closing first of active to turn off unit 110, these are all that can be used as triggering
The trigger condition that first shut-off unit 110 is turned off.But the second shut-off unit 112 is triggered, the part trigger condition of shut-off will
Much harsh, one of the problem of industry is both known about, and photovoltaic plant is most worried, which is that various exceptions may produce, causes larger warp
Help the fire lost, therefore the second shut-off unit 112 is last protective barrier, and the second shut-off unit 112 should be to bright at this time
Fire is more sensitive, and the first shut-off unit 110 compares, and the second shut-off unit 112 is easier rapidly to be cut off when meeting with naked light.
Second shut-off unit 112 includes the very sensitive all kinds of switches in temperature such as Temp.-control fuse, temperature detect switch (TDS), they are at normal temperatures
It is continuously turned on, is persistently turned off under high temperature naked light, what common fuse was embodied in major part is irreversible disposable
Component, for example meet with naked light and melt and fall short-circuit irreversible, and some temperature detect switch (TDS)s are disconnected under high temperature naked light, but temperature
It can recover to connect after decline, be reversible.
Referring to Fig. 3, Thermal Cutoffs also known as temperature controller, can produce in the improper running of induction apparatus electronic product
Overheat so that generation of the cut-off loop to avoid fire.Thermal Cutoffs is connected on circuit with exactly accurate reliable
The disposable elements of temperature protection circuit, when operating ambient temperature exceed Thermal Cutoffs rated temperature when, make it is therein certain
A little thermo-sensitive materials produce the rapid interrupt circuit of high temperature, avoid applying thermogenetic harm.People is needed after Temp.-control fuse fusing
The Temp.-control fuse that work more renews is so that circuit recovers normal operation.Thermal Cutoffs described above is to exceed nominal operation
Cut off the power during temperature, be disposable, fuse is fused by itself to cut electrical appliance, can but in addition to that also having
Automatically the Temp.-control fuse recovered.Temperature detect switch (TDS), thermally sensitive temperature switch, if Kick type temperature switch is that a kind of use is double
Temperature controller of the sheet metal as the temperature module, when electric appliance works normally, bimetal leaf be in free state, contact be in close/
Off-state, when temperature reaches operating temperature, bimetal leaf, which is heated, to be produced internal stress and acts rapidly, opened/closed contact,
And circuit is switched off/on, so as to play temperature control function.
Referring to Fig. 4, in monitoring and cutoff device MOM topologys：Both switching transistor SQ1 and insurance fuse FU while coupling
Close in first input end IN1With the first output terminal NO1Between, or in addition, both switching transistor SQ1 and insurance fuse FU are same
When be coupling in the second input terminal IN2With the second output terminal NO2Between.Switching transistor SQ1 and insurance fuse FU is the first pass respectively
Disconnected unit 110 and second turns off the alternative embodiment of unit 112.
Referring to Fig. 4, in monitoring and cutoff device MON topologys：Insurance fuse FU is coupling in the second input terminal IN2With second
Output terminal NO2Between, switching transistor SQ1 is coupling in first input end IN1With the first output terminal NO1Between and pay attention to switching
The position of both transistor SQ1 and insurance fuse FU can mutually be exchanged.
Referring to Fig. 5, compare with the embodiment of Fig. 3 and slightly improve.In figure 3, monitoring and the corresponding topologys of cutoff device MOM
In structure, the first output terminal NO1With the second output terminal NO2Between be also associated with the diode D of bypass, wherein cathode is connected to first
Output terminal NO1And anode is connected to the second output terminal NO2.If photovoltaic module PVM is monitored and cutoff device MOM is linked into battery
In string group, then diode is reverse biased, whereas if photovoltaic module PVM is monitored and cutoff device MOM is from battery strings group
Then diode forward is disconnected to turn on.
Referring to Fig. 5, in monitoring and the corresponding topological structures of cutoff device MOM, the diode D of Fig. 3, which is switched on and off, to be replaced
But effect is identical.Removal switch SQ2 wherein as shunting device is coupling in the first output terminal NO1With the second output terminal NO2
Between.The processor 100 of monitoring and cutoff device MOM configurations drives Fig. 4 access shut-off units 110 of switch SQ1 namely first to connect
Logical, then photovoltaic module PVM is just linked into the link that multilevel monitor and cutoff device are connected in series and carrys out tribute to tandem voltage
Offer the voltage and power section of oneself, be linked into equivalent to photovoltaic module PVM among whole battery strings group, processor 100 this
When also drive removal switch SQ2 shut-off.
Referring to Fig. 5, conversely, the driving of processor 100 of monitoring and cutoff device MOM configurations, which removes switch SQ2, connects then light
Volt component PVM is just shielded/bypassed from the link that multilevel monitor and cutoff device are connected in series, and that is to say photovoltaic module
Tandem voltages of the PVM without the normal direction link contributes the voltage of oneself and power section, and processor 100 at this time open by also driving access
The shut-off units 110 of SQ1 namely first are closed to turn off.Equivalent to photovoltaic module PVM by from shielding/bypass among whole battery strings group
Fall.
Referring to Fig. 5, the function embodiment of monitoring and cutoff device exists：For a corresponding photovoltaic module to be bypassed
And forbid providing electric energy/power into link, or for a corresponding photovoltaic module to be switched from shielding/bypass condition
Electric energy/power is provided to access state then into link.When photovoltaic module meets with various anomalous events or event of failure, by
Monitoring and the supervisory function bit of cutoff device and shut-off effect, for preventing the dangerous situations such as fire to be highly desirable.
Referring to Fig. 1, and the corresponding embodiments of upper Fig. 2-5 above are combined, first first in multilevel monitor and cutoff device
The monitoring of level and the first output terminal NO of cutoff device MO11Second output of monitoring and cutoff device MON with the level-one at end
Hold NO2Between the tandem voltage that component PV1-PVN is produced, the monitoring of the first first order and the first output terminal of cutoff device are provided
NO1Be the equal of the equivalent cathode of multilevel monitor and cutoff device link, the monitoring of the last level-one at end and cutoff device
The second output terminal NO2It is the equal of the equivalent anode of multilevel monitor and cutoff device link.And the adjustment of total tandem voltage
It is embodied in：Any one photovoltaic module is bypassed and prohibited by its corresponding monitoring and cutoff device when meeting with the failure specified
Electric energy/power is only provided into battery strings group, alternatively, any one photovoltaic module is when the specified failure met with is released from,
It is switched to access state by its corresponding monitoring and cutoff device from shielding/bypass condition and is transferred to provide into whole battery strings group
Electric energy/power.This failure specified include at least photovoltaic module temperature exceed predetermined threshold value excess temperature failure.One
In a embodiment, the rated temperature range that the first shut-off unit 110 can work normally is triggered less than the second shut-off unit 112
The temperature of shut-off, if the environment temperature of the temperature of photovoltaic module or surrounding can not worked normally in the first shut-off unit 110
Rated temperature range, then first shut-off unit 110 even if receive shut-off control signal or command signal from processor
Possibly can not timely and effectively it turn off, but the second shut-off unit 112 is triggered, the temperature of shut-off is than the first shut-off unit 110
Rated temperature range, even if the slightly lifting of the environment temperature of the temperature of photovoltaic module or surrounding causes the first shut-off unit 110 to lose
Effect, but the second shut-off unit 112 can be caused to be triggered shut-off, remain able to ensure the running that whole electricity generation system is safe and reliable.
Above by explanation and the content of attached drawing, the exemplary embodiments of the specific structure of embodiment are given, on
State utility model and propose existing preferred embodiment, but these contents are not intended as limiting to.For those skilled in the art
For after reading the above description, various changes and modifications undoubtedly will be evident.Therefore, appended claims should be regarded as
It is whole variations and modifications of the true intention and scope that cover the utility model.It is any and all in Claims scope
Scope and content of equal value, is all considered as still belonging in the intention and scope of the utility model.
Claims (10)
- A kind of 1. monitoring and cutoff device for photovoltaic module, it is characterised in that including：The the first shut-off unit and the second shut-off unit arranged on the circuit of photovoltaic module electrode is coupled in；Second shut-off unit be triggered shut-off part trigger condition at least be different from first shut-off unit be triggered shut-off touch Clockwork spring part；To ensure that photovoltaic module at least can give open circuit when meeting with the failure specified by one of first, second shut-off unit.
- 2. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：First shut-off unit includes power semiconductor switch, breaker, magnetic switch.
- 3. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：Second shut-off unit includes Temp.-control fuse, temperature detect switch (TDS).
- 4. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：Photovoltaic module is also configured with temperature sensor and supporting processor for monitoring real time temperature；When the temperature of photovoltaic module exceedes predetermined threshold value, the first shut-off of processor control unit is turned off.
- 5. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：Photovoltaic module is also configured with voltage sensor and current sensor for monitoring voltage, electric current.
- 6. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：First rated temperature range that can work normally of shut-off unit is triggered the temperature of shut-off less than the second shut-off unit.
- 7. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：The trigger condition that second shut-off unit is different from the shut-off that is triggered of the first shut-off unit includes at least：Second shut-off unit It is easier to be rapidly cut off when meeting with naked light.
- 8. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：On the circuit of positive electrode for being coupled in photovoltaic module while it is disposed with first, second shut-off unit；OrOn the circuit of negative electrode for being coupled in photovoltaic module while it is disposed with first, second shut-off unit.
- 9. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：On the circuit of positive electrode for being coupled in photovoltaic module while it is disposed with one of first, second shut-off unit；AndOn the circuit of negative electrode for being coupled in photovoltaic module while it is disposed with the other of first, second shut-off unit.
- 10. the monitoring and cutoff device according to claim 1 for photovoltaic module, it is characterised in that：Multiple photovoltaic modulies are serially connected in battery string formation；Bypass diode or by-pass switch are there also is provided on one group of circuit for being coupled in the positive and negative electrode of photovoltaic module；The bypass diode by forward conduction or the bypass that is switched on when any one photovoltaic module interrupts road from battery string formation Switch is bypassed the photovoltaic module being switched off.
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| CN201721345004.9U CN207283498U (en) | 2017-10-19 | 2017-10-19 | Monitoring and cutoff device for photovoltaic module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066798A (en) * | 2018-09-17 | 2018-12-21 | 阳光电源股份有限公司 | A kind of cutoff device of photovoltaic module |
| CN110767618A (en) * | 2019-11-01 | 2020-02-07 | 芜湖市智行天下工业设计有限公司 | Heat dissipation and protection architecture to power module |
| CN110970918A (en) * | 2018-09-30 | 2020-04-07 | 海宁昱能电子有限公司 | Photovoltaic module control system and method and photovoltaic system |
| CN111175590A (en) * | 2018-11-13 | 2020-05-19 | 海宁昱能电子有限公司 | Testing arrangement of photovoltaic terminal box |
| TWI792177B (en) * | 2020-08-07 | 2023-02-11 | 台達電子工業股份有限公司 | Safety shut-down device with self-driving control, power supply system and method of self-driving control the same |
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- 2017-10-19 CN CN201721345004.9U patent/CN207283498U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066798A (en) * | 2018-09-17 | 2018-12-21 | 阳光电源股份有限公司 | A kind of cutoff device of photovoltaic module |
| US11043802B2 (en) | 2018-09-17 | 2021-06-22 | Sungrow Power Supply Co., Ltd. | Shutdown apparatus for photovoltaic module |
| CN110970918A (en) * | 2018-09-30 | 2020-04-07 | 海宁昱能电子有限公司 | Photovoltaic module control system and method and photovoltaic system |
| CN110970918B (en) * | 2018-09-30 | 2022-09-13 | 浙江英达威芯电子有限公司 | Photovoltaic module control system and method and photovoltaic system |
| CN111175590A (en) * | 2018-11-13 | 2020-05-19 | 海宁昱能电子有限公司 | Testing arrangement of photovoltaic terminal box |
| CN111175590B (en) * | 2018-11-13 | 2022-04-08 | 浙江英达威芯电子有限公司 | Testing arrangement of photovoltaic terminal box |
| CN110767618A (en) * | 2019-11-01 | 2020-02-07 | 芜湖市智行天下工业设计有限公司 | Heat dissipation and protection architecture to power module |
| TWI792177B (en) * | 2020-08-07 | 2023-02-11 | 台達電子工業股份有限公司 | Safety shut-down device with self-driving control, power supply system and method of self-driving control the same |
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