CN108063595A - Photovoltaic module PID repairs circuit - Google Patents
Photovoltaic module PID repairs circuit Download PDFInfo
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- CN108063595A CN108063595A CN201711473218.9A CN201711473218A CN108063595A CN 108063595 A CN108063595 A CN 108063595A CN 201711473218 A CN201711473218 A CN 201711473218A CN 108063595 A CN108063595 A CN 108063595A
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- 230000008439 repair process Effects 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 4
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- 230000006378 damage Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
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- 239000011521 glass Substances 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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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
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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
Abstract
This application involves a kind of photovoltaic module PID repair systems in large-scale grid-connected photovoltaic power generation power station more particularly to a kind of photovoltaic module PID to repair circuit；It includes optocoupler, the first diode, relay, control loop, control power supply, more voltage doubling rectifing circuits；The light emitting diode series aiding connection of first diode and optocoupler input side, the cathode of the first diode are connected with sun-generated electric power cathode, and the anode of the light emitting diode of optocoupler input side is connected with sun-generated electric power anode.Due to implementing above-mentioned technical proposal, the application is effectively isolated by the DC voltage of hundreds of volts of optocoupler and the extremely low voltage of control loop, promotes the security level of circuit system；When between sun-generated electric power positive and negative electrode without operating voltage, more voltage doubling rectifing circuit work, its direct current output high pressure is connected between sun-generated electric power cathode and sun-generated electric power ground terminal, so as to which PID photovoltaic modulies are discharged on daytime because of the accumulative charge of back bias voltage institute between cathode and ground, and then repair the photovoltaic module of PID effects.
Description
Technical field
This application involves a kind of the photovoltaic module PID repair systems more particularly to one kind in large-scale grid-connected photovoltaic power generation power station
Photovoltaic module PID repairs circuit.
Background technology
In photovoltaic generating system, through moisture, the environment of high temperature easily generate vapor, if steam gos deep into component,
So the conductivity of encapsulating material (ENC) rises, and the leakage current increase of corresponding assembly can cause assembly surface polarization phenomena,
That is PID effects.PID effects (Potential Induced Degradation) are also known as potential induction attenuation, are photovoltaic cell groups
The encapsulating material of part and the material of its upper surface and the lower surface, under the action of high voltage between cell piece and its grounded metal frame
The phenomenon that there is Ion transfer, and assembly property caused to decay.
Up to the present the true cause of PID is not come to a conclusion explicitly, but each photovoltaic cell component factory and research institution
Statistics indicate that, PID is related with battery, glass, glued membrane, temperature, humidity and voltage.
Once PID phenomenons occurs in photovoltaic module, the decline of generating voltage and electric current is mainly reflected in terms of electric property,
I.e. output power declines.In addition, in pv grid-connected plant, photovoltaic module is application in parallel again after more than ten or 20 pieces of series connection
, not only itself output power declines PID components, and global voltage same string formation and electric current drag down.It ultimately results in whole
The electricity generation efficiency of a photovoltaic plant reduces.Occur PID problems photovoltaic module do not damage completely, for an area it is huge,
For the scattered photovoltaic plant of PID components distributions, the mode replaced comprehensively spends that big, engineering is big, the cycle is long.
The content of the invention
The purpose of the application is to propose what a kind of night automatically discharged stored charge between photovoltaic module cathode and ground
Photovoltaic module PID repairs circuit.
What the application was realized in：Photovoltaic module PID repair circuit, including optocoupler, the first diode, relay,
Control loop, control power supply, more voltage doubling rectifing circuits；The light emitting diode series aiding connection of first diode and optocoupler input side,
The cathode of first diode is connected with sun-generated electric power cathode, the anode and sun-generated electric power of the light emitting diode of optocoupler input side
Anode is connected, after optocoupler turns on, that is, no power, electric relay coil and optocoupler outlet side can be obtained after optocoupler ends
Phototriode is connected in the control loop with control power supply；The input terminal of more voltage doubling rectifing circuits is normal with relay first
The two-phase that AC power is connected to after contact is connected is opened, the output head anode and relay second of more voltage doubling rectifing circuits are normally opened tactile
Point is connected to sun-generated electric power cathode after being connected, the negative pole of output end of more voltage doubling rectifing circuits is connected to sun-generated electric power ground connection
End.
Further, control loop includes the second current-limiting resistance, the first discharge resistance, electrolytic capacitor, filter capacitor and has
555 integrated circuits of eight feet；Control the output cathode of the power supply photoelectricity with optocoupler outlet side respectively after the second current-limiting resistance
The collector of triode, four feet of 555 integrated circuits and eight foot, the anode of electrolytic capacitor are connected；The negative terminal difference of electrolytic capacitor
It is connected with the land foot of 555 integrated circuits and two feet；After the filtered capacitance of 5 feet of 555 integrated circuits, the negative terminal of electrolytic capacitor warp
After first discharge resistance, one foot of 555 integrated circuits be respectively connected to control power supply output bear grade；Three foot of 555 integrated circuits
It is connected with electric relay coil can be obtained after three foot of 555 integrated circuits exports high level.
Further, control loop has further included driving triode；Three foot of 555 integrated circuits is connected to driving triode
Base stage, relay coil be connected to control power supply output cathode and drive triode collector between, drive triode
Emitter be connected to control power supply output bear grade.
Further, relay coil both ends are parallel with the 4th current-limiting resistance being cascaded and work indication light two
Pole pipe, the cathode for the indication light diode that works is with driving the collector of triode to be connected；Relay coil both ends are also parallel with
Second diode, the anode of the second diode is with driving the collector of triode to be connected.
Further, it is connected with the 3rd current-limiting resistance between three foot of 555 integrated circuits and the base stage for driving triode.
Further, the input anode of more voltage doubling rectifing circuits is connected to AC power after being connected with the first normally opened contact
Firewire, the input cathode of more voltage doubling rectifing circuits is connected to the zero curve of AC power；The output terminal of more voltage doubling rectifing circuits
Anode is connected to sun-generated electric power cathode, the negative pole of output end of more voltage doubling rectifing circuits after being connected with the second normally opened contact of relay
It is connected to sun-generated electric power ground terminal.
Further, breaker is equipped between AC power and more voltage doubling rectifing circuits；The level-one of breaker and first normally opened
Contact is connected, and the input cathode of the more voltage doubling rectifing circuits of another grade of breaker is connected；With the normally opened feedback of breaker linkage
Contact portion is between the anode of the light emitting diode of optocoupler input side and sun-generated electric power anode.
Further, the firewire of AC power, zero curve are respectively connected to control power supply after being connected with the two poles of the earth of breaker
Input positive and negative electrode；It is normally closed tactile that relay is serially connected between the output head anode of more voltage doubling rectifing circuits and sun-generated electric power ground terminal
Point and the second discharge resistance.
Further, between the normally opened feedback contact and the anode of the light emitting diode of optocoupler input side that link with breaker
It is serially connected at least one first current-limiting resistance.
Further, it is connected with the 4th between the first normally opened contact of the output head anode of more voltage doubling rectifing circuits and relay
Current-limiting resistance.
Further, optocoupler, the first diode, control loop, relay, more voltage doubling rectifing circuits are integrated in one piece of control
On circuit board processed.
Due to implementing above-mentioned technical proposal, the application is extremely low by the DC voltage of hundreds of volts of optocoupler and control loop
Voltage is effectively isolated, and promotes the security level of circuit system；When having voltage between sun-generated electric power positive and negative electrode, that is, in vain
During its power generation, optocoupler is switched on, and circuit where relay coil is locked；When electric without work between sun-generated electric power positive and negative electrode
During pressure, optocoupler cut-off, relay coil obtains electric, the first normally opened contact of relay, the second normally opened contact closure, more voltage multiplying rectifiers electricity
Road works, and direct current output high pressure is connected between sun-generated electric power cathode and sun-generated electric power ground terminal, so as to PID photovoltaic groups
Part discharges on daytime because of the accumulative charge of back bias voltage institute between cathode and ground, and then repairs the photovoltaic of PID effects
Component.
Description of the drawings
The concrete structure of the application is provided by following drawings and examples：
Fig. 1 is the structure diagram of the application most preferred embodiment；
Fig. 2 is the structure diagram of four voltage doubling rectifing circuits.
Legend：IC1. optocoupler, the first diodes of D1., K0. relay coils, the first normally opened contact of K11. relays, K12.
The second normally opened contact of relay, K2. relay normally closed contacts, AC-DC. control power supplys, PV+. sun-generated electric power anodes, PV-. is too
Positive energy power cathode, PV0. sun-generated electric power ground terminals, the first current-limiting resistances of R1., the second current-limiting resistances of R2., the 3rd current limlitings of R3.
Resistance, the 4th current-limiting resistances of R4., the 5th current-limiting resistances of R5., the first discharge resistances of R6., the second discharge resistances of R7., C1. electrolysis
Capacitance, C2. filter capacitors, IC2.555 integrated circuits, 1. 1 feet, 2. 2 feet, 3. 3 feet, 4. 4 feet, 5. 5 feet, 6. land feet, 8.
Eight foot, Q1. driving triodes, LED. work indication light diodes, the second diodes of D2., L. firewires, N. zero curves, QF. open circuits
Device, the normally opened feedback contacts of AX., U. control circuit boards.
Specific embodiment
The application can determine specifically from the limitation of following embodiments according to the technical solution of the application with actual conditions
Embodiment.
Embodiment, as shown in Figure 1, photovoltaic module PID repair circuit include optocoupler IC1, the first diode D1, relay,
Control loop, control power supply AC-DC, more voltage doubling rectifing circuits；The light emitting diode of first diode D1 and optocoupler IC1 input sides
Series aiding connection, the cathode of the first diode D1 are connected with sun-generated electric power cathode PV-, the light emitting diode of optocoupler IC1 input sides
Anode be connected with sun-generated electric power anode PV+, after optocoupler IC1 is turned on, that is, no power, can obtain after optocoupler ends it is electric
The phototriode of relay coil K0 and optocoupler IC1 outlet sides is connected in the control loop with control power supply AC-DC；It is more
The input terminal of voltage doubling rectifing circuit is connected to the two-phase of AC power, more multiplication of voltages after being connected with the first normally opened contact of relay K11
The output head anode of rectification circuit is connected to sun-generated electric power cathode PV- after being connected with the second normally opened contact of relay K12, more times
The negative pole of output end of voltage rectifier is connected to sun-generated electric power ground terminal PV0.
There are hundreds of volt DC voltages, optocoupler IC1 inputs in the case of sun-generated electric power normal power generation, between positive and negative electrode
The light emitting diode forward conduction of side, the phototriode of optocoupler IC1 outlet sides is also by light conduction, the light of optocoupler IC1 outlet sides
The current potential of the collector of electric triode is zero, and relay coil K0 must not be electric, and the application is in PID and repairs holding state.That night
After upper illumination weakens, the voltage of sun-generated electric power is down to zero, and the light emitting diode decompression of optocoupler IC1 input sides is ended, optocoupler IC1
Also loss of gloss ends the phototriode of outlet side, and the collector potential of the phototriode of optocoupler IC1 outlet sides becomes higher, relay
Coil K0 obtains electric, relay the first normally opened contact K11 and the second normally opened contact of relay K12 closures, more voltage doubling rectifing circuit works
Make, the direct current output high pressures of more voltage doubling rectifing circuits be connected to sun-generated electric power cathode PV- and sun-generated electric power ground terminal PV0 it
Between, so as to which PID photovoltaic modulies are discharged on daytime because of the accumulative charge of back bias voltage institute between cathode and ground, and then
The photovoltaic module of PID effects is repaired, the application is in PID repair states.After the next morning illumination enhances, solar energy
Power supply reappears voltage/current, optocoupler IC1 conductings, and the application is again at PID and repairs holding state.
The characteristics of optocoupler IC1 is input and output isolation, and signal speed is fast, and the load capacity of output is small（Milliampere grade）, only
Microelectronic component can be driven, but is active in one's movements.
It, can be by more voltage doubling rectifing circuits by relay the first normally opened contact K11 and relay the second normally opened contact K12
Input terminal is also turned on and is disconnected by two relay normally open contacts with output terminal；Its purpose is to consider the application
Maintenance safety, convenient for the application be in PID repair holding state when, circuit is overhauled, is guaranteed personal safety.
AC power can draw 220V alternating currents all the way from photovoltaic inversion indoor power supply.
The application does not generate power consumption when not working daytime, and the power consumption when working at night is also only 10 watts or so, action
It is sensitive, it is cheap；The probability for being out of order or damaging is extremely small, and reliability is high.
As shown in Figure 1, control loop includes the second current-limiting resistance R2, the first discharge resistance R6, electrolytic capacitor C1, filtered electrical
Hold C2 and there are 555 Integrated circuit IC 2 of eight feet；The output cathode of power supply AC-DC is controlled to distinguish after the second current-limiting resistance R2
Four feet 4 and eight foot 8 of collector, 555 Integrated circuit IC 2 with the phototriode of optocoupler IC1 outlet sides, electrolytic capacitor C1
Anode is connected；The negative terminal of electrolytic capacitor C1 is connected respectively with 6 and two foot 2 of the land foot of 555 Integrated circuit IC 2；555 integrated circuits
After 5 feet, the 5 filtered capacitance C2 of IC2, the negative terminal of electrolytic capacitor C1 is after the first discharge resistance R6,555 Integrated circuit IC 2
Grade is born in the output that one foot 1 is respectively connected to control power supply AC-DC；Three foot 3 of 555 Integrated circuit IC 2 is with working as 555 Integrated circuit IC 2
Three foot 3 output high level after can obtain electric relay coil K0 and be connected.
555 Integrated circuit IC 2 are existing public technology, and what is added in act as delay output.Because natural lighting
It is not linear taper during gradually weakening at night, but non-linear decrease, it is reacted on photovoltaic module,
Certain moment decompression due to loss of gloss, but after a while, illumination is possible to excite photovoltaic module again and generate voltage and current, if
It is possible to cause the Important Components relay in the application to shake repeatedly in a short time without 555 Integrated circuit IC 2, leads
Subsequent more voltage doubling rectifing circuits is caused to shake repeatedly, so entire circuit system is adversely affected, it is more seriously, more
The output high pressure of voltage doubling rectifing circuit cuts in and out, and to photovoltaic module, photovoltaic DC-to-AC converter, there are larger uncertain damage is general
Rate.So setting of 555 Integrated circuit IC 2, you can after ensureing the absolute decompression of sun-generated electric power, can just be in PID repairs
State in turn ensures circuit safety, equipment safety.Because the illumination in morning belongs to quick enhancing mostly, even if occurring repeatedly, 555
Integrated circuit IC 2 also can effectively avoid subsequent conditioning circuit and generate concussion.
During work, when optocoupler IC1 ends, four feet 4 of 555 Integrated circuit IC 2 and eight foot 8 obtain electric, electrolytic capacitor simultaneously
The charge-discharge circuit that C1, the first discharge resistance R6,6 and two foot 2 of land foot of 555 Integrated circuit IC 2 form is started to work, and works as electrolysis
The voltage of capacitance C1 gradually rises, and the voltage of 6 and two foot 2 of land foot of 555 Integrated circuit IC 2 continuously decreases, and treats the reduction of its voltage
After below to 1/3rd times of supply voltages, the output state flip of 555 Integrated circuit IC 2, i.e. 555 Integrated circuit IC 2
Three foot 3 exports high level；Relay coil K0 obtains electric.
As shown in Figure 1, control loop has further included driving triode Q1；Three foot 3 of 555 Integrated circuit IC 2 is connected to drive
The base stage of dynamic triode Q1, relay coil K0 are connected to the collection of the output cathode and driving triode Q1 of control power supply AC-DC
Between electrode, the emitter of driving triode Q1, which is connected to, controls the output of power supply AC-DC to bear grade.
During work, after three foot 3 of 555 Integrated circuit IC 2 exports high level, the Q1 conductings of driving triode drive three poles
The collector potential vanishing of pipe Q1 causes relay coil K0 to obtain electric.
Because the scope range of the fluctuation of voltage of optocoupler IC1 input sides is very wide（300~740VDC）Though the pincers of current-limiting resistance can be added in
System, control loop output signal jitter may also occur, the actuating of relay caused to shake；After adding in driving triode Q1, control
Circuit will form a set of metastable Darlington transistor system, can effectively filter out these problems, while drive triode Q1 in itself
Also there is the characteristic of Small current control high current, can fully ensure that the electric current in circuit is sufficient, and then ensure relay action message.
As shown in Figure 1, relay coil K0 both ends are parallel with the 4th current-limiting resistance R4 being cascaded and work indicates
Light-emitting diode LED, the cathode for the indication light diode (LED) that works is with driving the collector of triode Q1 to be connected；Relay line
Circle K0 both ends are also parallel with the anode of the second diode D2, the second diode D2 with the collector of triode Q1 is driven to be connected；Or/
The 3rd current-limiting resistance R3 is connected between three foot 3 of, 555 Integrated circuit IC 2 and the base stage of driving triode Q1.
So when controlling the power supply AC-DC driving actuatings of relay, while work indication light diode (LED) can be driven to send out
Light, display working condition.
Second diode D2 plays fly-wheel diode：Because relay coil K0 is inductive load, pass through when there is electric current
When, both ends have induced electromotive force generation；When the current vanishes, induced electromotive force can generate the element in circuit reversed
Voltage.For relay, since relay coil K0 is a larger inductance, it can store electric energy in the form of magnetic field,
So meeting storage tape when it is attracted, after its power-off, the inside magnetic field does not disappear immediately, which will generate reversed
Electromotive force, voltage can instantaneously reach tens of volts, and such voltage is easy to puncture such as circuit element, causes damages.Pass through setting
Second diode D2, when flowing through the current vanishes in relay coil K0, the induced electromotive force of generation will pass through the two or two
The circuit that pole pipe D2 and relay coil K0 is formed consumes, so as to ensure the safety of other elements.
As shown in Figure 1, the input anode of more voltage doubling rectifing circuits is connected to alternating current after being connected with the first normally opened contact
The firewire L in source, the input cathode of more voltage doubling rectifing circuits are connected to the zero curve N of AC power；More voltage doubling rectifing circuits it is defeated
Outlet anode is connected to sun-generated electric power cathode PV- after being connected with the second normally opened contact of relay K12, more voltage doubling rectifing circuits
Negative pole of output end is connected to sun-generated electric power ground terminal PV0.
More voltage doubling rectifing circuits are existing public technology, are the rectification using diode and guide function, by electricity
Pressure is stored to respectively on respective capacitance, then they is connected in series by the principle that polarity is added, output is higher than input voltage
High pressure come.
As shown in Fig. 2, it is four voltage doubling rectifing circuits；Four rectifier diodes therein and four electricity to being applied to filtering
Hold, the positive and negative half cycle voltage of alternating current input power supplying is passed through diode rectification and charge and discharge step by step, forms the direct current of more multiplication of voltages
Electricity, therefore can be the direct current of 880V or so by the rectification of 220V AC powers.
As shown in Figure 1, circuit breaker Q F is equipped between AC power and more voltage doubling rectifing circuits；The level-one of circuit breaker Q F and first
Normally opened contact is connected, and another grade of circuit breaker Q F is connected with the input cathode of more voltage doubling rectifing circuits；It links with circuit breaker Q F
Normally opened feedback contact AX be connected between the anode of light emitting diode of optocoupler IC1 input sides and sun-generated electric power anode PV+.
When normally opened feedback contact AX with circuit breaker Q F close a floodgate and be closed, do not influence the application normal use；Work as breaker
For QF by after artificial separating brake, normally opened feedback contact AX reverts to off-state, and sun-generated electric power anode PV+ then is led to optocoupler
The failure of current of IC1, optocoupler IC1 cut-offs, all subsequent conditioning circuits are stopped；Achieve the purpose that wiring/take out stitches is safe.
As shown in Figure 1, the firewire L of AC power, zero curve N are respectively connected to control electricity after being connected with the two poles of the earth of circuit breaker Q F
The input positive and negative electrode of source AC-DC；It is serially connected between the output head anode of more voltage doubling rectifing circuits and sun-generated electric power ground terminal PV0
Relay normally closed contact K2 and the second discharge resistance R7.
When entering second day daytime, i.e., when the application is again at PID reparation holding states, more voltage doubling rectifing circuits stop
Work, output voltage are zeroed at once；Relay normally closed contact K2 is closed at this time, coordinates the second discharge resistance R7 by more voltage multiplying rectifiers
The high voltage direct current of circuit is slowly released, in order to avoid injure personnel during start maintenance.
As shown in Figure 1, with the light emitting diode of normally opened feedback contact AX and the optocoupler IC1 input sides of circuit breaker Q F linkages
At least one first current-limiting resistance R1 is serially connected between anode.
As shown in Figure 1, it is connected between the output head anode of more voltage doubling rectifing circuits and the first normally opened contact of relay K11
4th current-limiting resistance R4.
As shown in Figure 1, optocoupler IC1, the first diode D1, control loop, relay, more voltage doubling rectifing circuits are integrated in
On one piece of control circuit board U.The application that is so more convenient for is installed in grid-connected photovoltaic power generation power station, replaces, safeguarded；It reduces into
This.
More than technical characteristic constitutes the most preferred embodiment of the application, is imitated with stronger adaptability and optimal implementation
Fruit can increase and decrease inessential technical characteristic according to actual needs, to meet the needs of different situations.
Claims (10)
1. a kind of photovoltaic module PID repairs circuit, it is characterised in that：Including optocoupler, the first diode, relay, control loop,
Control power supply, more voltage doubling rectifing circuits；The light emitting diode series aiding connection of first diode and optocoupler input side, the first diode
Cathode be connected with sun-generated electric power cathode, the anode of the light emitting diode of optocoupler input side is connected with sun-generated electric power anode,
After optocoupler turns on, that is, no power, the phototriode of electric relay coil and optocoupler outlet side can be obtained after optocoupler ends
It is connected in the control loop with control power supply；The input terminal of more voltage doubling rectifing circuits is connected with the first normally opened contact of relay
It is connected to the two-phase of AC power afterwards, the output head anodes of more voltage doubling rectifing circuits connects after being connected with the second normally opened contact of relay
Sun-generated electric power cathode is connected to, the negative pole of output end of more voltage doubling rectifing circuits is connected to sun-generated electric power ground terminal.
2. photovoltaic module PID according to claim 1 repairs circuit, it is characterised in that：Control loop includes the second current limliting
Resistance, the first discharge resistance, electrolytic capacitor, filter capacitor and 555 integrated circuits for having eight feet；Control the output cathode of power supply
After the second current-limiting resistance respectively with the collector of the phototriode of optocoupler outlet side, four feet of 555 integrated circuits and eight foot,
The anode of electrolytic capacitor is connected；The negative terminal of electrolytic capacitor is connected respectively with the land foot of 555 integrated circuits and two feet；555 integrated electricity
After the filtered capacitance of 5 feet on road, the negative terminal of electrolytic capacitor after the first discharge resistance, one foot of 555 integrated circuits is respectively connected to
Grade is born in the output of control power supply；Three foot of 555 integrated circuits is electric with that can be obtained after three foot of 555 integrated circuits exports high level
Relay coil be connected.
3. photovoltaic module PID according to claim 2 repairs circuit, it is characterised in that：Control loop has further included driving
Triode；Three foot of 555 integrated circuits is connected to the base stage of driving triode, and relay coil is connected to the output of control power supply
Between anode and the collector for driving triode, the emitter of triode is driven to be connected to, the output of power supply is controlled to bear grade.
4. photovoltaic module PID according to claim 3 repairs circuit, it is characterised in that：Relay coil both ends are parallel with
The 4th current-limiting resistance and work indication light diode being cascaded, cathode and the driving three of the indication light diode that works
The collector of pole pipe is connected；Relay coil both ends are also parallel with the second diode, anode and three poles of driving of the second diode
The collector of pipe is connected；Or/and 555 integrated circuit three foot and drive triode base stage between be connected with the 3rd current-limiting resistance.
5. photovoltaic module PID according to claim 1 repairs circuit, it is characterised in that：The input of more voltage doubling rectifing circuits
Rectify the firewire that AC power is connected to after pole is connected with the first normally opened contact, the input cathode connection of more voltage doubling rectifing circuits
To the zero curve of AC power；The output head anode of more voltage doubling rectifing circuits is connected to too after being connected with the second normally opened contact of relay
Positive energy power cathode, the negative pole of output end of more voltage doubling rectifing circuits are connected to sun-generated electric power ground terminal.
6. the photovoltaic module PID according to claim 1 or 2 or 3 or 4 or 5 repairs circuit, it is characterised in that：AC power
Breaker is equipped between more voltage doubling rectifing circuits；The level-one of breaker is connected with the first normally opened contact, and another grade of breaker is more
The input cathode of voltage doubling rectifing circuit is connected；Shining for optocoupler input side is connected to the normally opened feedback contact of breaker linkage
Between the anode of diode and sun-generated electric power anode.
7. photovoltaic module PID according to claim 6 repairs circuit, it is characterised in that：The firewire of AC power, zero curve with
The two poles of the earth of breaker are respectively connected to the input positive and negative electrode of control power supply after being connected；The output head anode of more voltage doubling rectifing circuits
Relay normally closed contact and the second discharge resistance are serially connected between sun-generated electric power ground terminal.
8. photovoltaic module PID according to claim 6 repairs circuit, it is characterised in that：It links with breaker normally opened anti-
At least one first current-limiting resistance is serially connected between the anode of the light emitting diode of feedback contact and optocoupler input side.
9. the photovoltaic module PID according to claim 1 or 2 or 3 or 4 or 5 repairs circuit, it is characterised in that：More times of repoussages
The 4th current-limiting resistance is connected between the first normally opened contact of output head anode and relay of current circuit.
10. the photovoltaic module PID according to claim 1 or 2 or 3 or 4 or 5 repairs circuit, it is characterised in that：Optocoupler,
One diode, control loop, relay, more voltage doubling rectifing circuits are integrated in one piece of control circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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