CN106712253A - Device and method used in photovoltaic power plant for monitoring and suppressing potential induced degradation effect - Google Patents
Device and method used in photovoltaic power plant for monitoring and suppressing potential induced degradation effect Download PDFInfo
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- CN106712253A CN106712253A CN201710014111.1A CN201710014111A CN106712253A CN 106712253 A CN106712253 A CN 106712253A CN 201710014111 A CN201710014111 A CN 201710014111A CN 106712253 A CN106712253 A CN 106712253A
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- group string
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention provides a device used in a photovoltaic power plant for monitoring and suppressing a potential induced degradation (PID) effect. The photovoltaic power plant comprises a photovoltaic module string and a battery module. The device comprises a charge control module, a discharge control module, a data acquisition module, a clock module and a control operation and processing module, wherein the charge control module is used for controlling the photovoltaic module string to charge the battery module; the discharge control module is used for controlling the battery module to apply an inverse voltage to the photovoltaic module string when the PID effect occurs; the data acquisition module is used for acquiring voltage data of the photovoltaic module string and electric quantity condition of the battery module; the clock module is used for acquiring current time of a system; and the control operation and processing module is used for performing analytical processing according to the data acquired by the data acquisition module and the clock module, and further controlling the start-stop operations of the charge control module and the discharge control module. The invention further provides a method used in the photovoltaic power plant for monitoring and suppressing the PID effect. The device has the advantages of being simple in structure, small in size, low in cost, and capable of performing effective monitoring and suppressing on the PID effect of the photovoltaic power plant.
Description
Technical field
The present invention relates to a kind of photovoltaic plant with monitor and suppress current potential induce attenuation effect device and its method of testing,
Belong to technical field of new energy utilization.
Background technology
With the development of new energy, photovoltaic generating system is widely used, but part photovoltaic plant is in operation 3
The phenomenon that generated energy is decreased obviously even occurs after shorter time within~4 years, it is particularly bright in hot and humid regional this phenomenon
It is aobvious.
Current potential induces decay (PID), is found in 2005 by Sunpower companies earliest.PID refers in long-term high voltage
Under effect, make the presence of leakage current between glass, encapsulating material, cause assembly property to be less than design standard.U.S.'s regenerative resource
Laboratory and the research of Solon companies find that p-type crystal-silicon battery slice prepares establishment and there is PID phenomenons under back bias voltage.PID phenomenons
Monolithic element power attenuation more than 50% can be made.Numerous studies show in high temperature, high humidity and high salinity area and littoral district's groups
The power attenuation of part is the most serious, mainly has 3 aspects in addition to external environmental factor, the reason for cause component PID phenomenons：System
Aspect, component aspect and cell piece aspect.The component PID that module frame in photovoltaic plant causes with the electrical potential difference of component internal
Phenomenon is recognized by industry.PID effects can cause photovoltaic module power to decay, and cause built photovoltaic power station power generation amount to decline to a great extent,
Very big economic loss is caused, therefore it is significant for photovoltaic industry to eliminate the PID effects of power station component.
It is the reason for for triggering current potential to induce decay, general using the material for being resistant to PID for the photovoltaic plant do not built
The risk that PID phenomenons occurs in component is reduced with technique, and this form is grounded also with certain using component negative pole in addition
Limitation, because combining inverter direct-flow input end must possess the function of negative pole ground connection first, if what next system was used
Combining inverter is non-isolation type, does not have electrical isolation between assembly array and power network, then when photovoltaic combining inverter works
System occurs the danger of leakage current, triggers creepage protection function；And during component negative pole ground connection, it is possible to trigger direct current side leakage
Electricity, thus this mode must to increase extra detection of electrical leakage and protection device dangerous here to prevent.
For built photovoltaic plant in the event of PID phenomenons, generally require and change the serious component of power attenuation,
Or need to be removed using array negative pole grounding measures bias voltage this inducement.The two measures are required for system
Transformed on a large scale, such as even to be changed grid-connected using pressure-resistant DC distribution cable higher, increase earth leakage protective device
Inverter, this needs great improvement cost.
The A of Chinese patent CN 103795341 disclose a kind of method of testing of the anti-PID decay of photovoltaic module, build first
One climatic chamber for being used to test the anti-PID decay of photovoltaic module, and to the environmental condition of photovoltaic module PID decay in climatic chamber
Reinforcing simulation is carried out, the PID rates of decay of photovoltaic module are improved；Calculated using the changed power before and after photovoltaic module PID decay
Go out the ability of the anti-PID decay of photovoltaic module.The U of Chinese patent CN 204794877 disclose a kind of PID effects suppressor, including
For the sampling processing circuit of PV voltages, output voltage and output current to solar panel, the sampling processing electricity
Road is connected with arithmetic control circuit, and arithmetic control circuit controls circuit to connect by optical coupling isolation circuit voltage-drop loading.
The monitoring to PID effects in photovoltaic plant is all not directed in above-mentioned two patents, and does not provide the structure of PID devices
Details and implementation.At present, not having can also monitor and suppress the device of PID effects for use on group string in photovoltaic plant
Related open source literature, in the market do not have such product yet.
The content of the invention
The technical problem to be solved in the present invention is how the PID effects of photovoltaic plant to be monitored and suppressed, so that and
When suppress power station PID effects, it is to avoid power station because PID effects occur lose.
In order to solve the above-mentioned technical problem, the technical scheme is that provide a kind of photovoltaic plant with monitor and suppress electricity
Position induces the device of attenuation effect, and photovoltaic plant includes photovoltaic group string and battery module, it is characterised in that described device includes：
For the charge control module for controlling photovoltaic group string to charge battery module；
When inducing attenuation effect for appearance potential, control battery module applies the electric discharge control of backward voltage to photovoltaic group string
Molding block；
For gather the output cathode voltage of photovoltaic group string, output negative pole voltage, at ground connection voltage and battery module electricity
The data acquisition module of amount situation；
For the clock module of acquisition system current time；
For the data gathered according to data acquisition module and clock module, treatment is analyzed, and then controls to charge
The control calculation process module of the start and stop work of control module and control of discharge module.
Preferably, the photovoltaic group string and battery module are all connected with charge control module, control of discharge module, photovoltaic group string
Data acquisition module is also connected with, data acquisition module, clock module, battery module are all connected with controlling calculation process module, control
Calculation process module is also connected with charge control module and control of discharge module.
Preferably, it is described to control calculation process module for DSP control panels.
Preferably, the output positive and negative electrode of the photovoltaic group string connects charge control module, charge control mould by switching K1
Block connects battery module by switching K3；The output negative pole and earthing pole of photovoltaic group string connect control of discharge mould by switching K2
Block, control of discharge module connects battery module by switching K4；Data acquisition module connects the output positive and negative electrode of photovoltaic group string,
Earthing pole, and battery module；Control calculation process module connects data acquisition module, battery module, switchs K1, switch K2, opens
Close K3, switch K4 and clock module.
Preferably, the switch K1 is connected with switch K2 using the interlock switch component of time control, realizes chain control
System；During night, K1 disconnects, K2 closures；During daytime, K2 disconnects, K1 closures.
Preferably, the charge control module is to be depressured charging circuit, including MOSFET pipes Q1, MOSFET pipe Q1 source electrodes connect
Switch K1 output head anodes are connect, MOSFET pipes Q1 drain electrode connections diode D1 negative poles and inductance L1 one end, the inductance L1 other ends connect
Connect electric capacity C1 one end and switch K3 input anodes, electric capacity C1 other end connecting valve K3 input cathodes, diode D1 positive poles
With switch K1 negative pole of output end；The input positive and negative electrode for switching K1 connects the output positive and negative electrode of photovoltaic group string respectively；Switch K3
Output end positive and negative electrode connect the positive and negative electrode of battery module respectively.
Preferably, the control of discharge module is boost conversion circuit, including electric capacity C2, electric capacity C2 one end connecting valve K2
The input cathode of negative pole of output end, the colelctor electrode of IGBT pipes Q2 and switch K4, the output of electric capacity C2 other end connecting valves K2
Rectify the negative pole of pole and diode D2, the emitter stage of the positive pole connection IGBT pipes Q2 of diode D2 and inductance L2 one end, inductance L2
The input anode of other end connecting valve K4；The input positive and negative electrode for switching K2 connects the output negative pole of photovoltaic group string respectively
PE at PV- and ground connection, the defeated place end positive and negative electrode for switching K4 connects the positive and negative electrode of battery module respectively.
Existed with monitoring and suppressing the method that current potential induces attenuation effect, its feature present invention also offers a kind of photovoltaic plant
In：It is with monitoring and suppressing the device that current potential induces attenuation effect, step using above-mentioned photovoltaic plant：
The output cathode voltage of data acquisition module Real-time Collection photovoltaic group string, output negative pole voltage, at ground connection voltage and
The battery condition of battery module, and it is sent to control calculation process module；The current time of clock module real-time acquisition system, and
It is sent to control calculation process module；
If current time is night, photovoltaic group string does not produce voltage in theory, and charge control module does not work；If now
When voltage difference between the output negative pole of photovoltaic group string and ground connection exceedes the PID levels monitoring limit value of setting, then it is assumed that photovoltaic
There is PID effects in power station, now applying backward voltage to photovoltaic group string by control of discharge module repairs, and suppresses PID effects
Should；
If current time is daytime, photovoltaic group string generates electricity and produces voltage, and control of discharge module does not work；If this time
Voltage difference between the output cathode and output negative pole of volt group string is in the chargeable range of battery module, and battery module electricity
During in underfill state, charge control module is opened, battery module is charged；Data acquisition module is to battery module
Electricity carries out monitor in real time, when battery module is full of, stops charging.
Preferably, determine that current time is as follows for the method on night or daytime：It is night to set a period of time scope, is passed through
The current time of clock module acquisition system, the time of collection is contrasted with the time range of setting, if the time of collection
In the time range of setting, then it is assumed that it, at night, is otherwise daytime to be.
Preferably, it is described as follows to the method that photovoltaic group string applying backward voltage is repaired by control of discharge module：
After control of discharge module applies backward voltage setting time to photovoltaic group string, control of discharge module is closed, resurvey photovoltaic group
Voltage difference between the output negative pole of string and ground connection, if monitoring limit value still greater than PID levels, reopens control of discharge
Module, applies direction voltage and repairs to photovoltaic module；Aforesaid operations are repeated, until the output negative pole of photovoltaic group string and ground connection
Between voltage difference less than or equal to PID levels monitor limit value, then control of discharge module remain off.
Compared with prior art, the present invention provide photovoltaic plant with monitor and suppress current potential induce attenuation effect device
Have the advantages that：
1st, the present apparatus has the function of monitoring PID levels, can in time monitor PID levels in power station, and can pass through
The parameter value of sets itself device realizes the monitoring to power station.Monitored by the PID to power station, find what power station was present in time
Problem, and repaired for a group string PID effects.Avoid power station wait until find generating efficiency actually reduce, influence income after,
Restraining device is used again.
2nd, the present apparatus is discharged using lithium cell charging, and small volume, simple structure is easy for installation, adapts to all kinds of power stations.For
The power station built up, because of a variety of causes, its layout connected mode etc. all has difference in different power stations.If device is from power station
Grid entry point take a little, then power taking line more long may be needed, increase installation cost.And can not changed using the present apparatus
The preventing and treating to PID effects is farthest realized in the case of any loop.Applicable scope is wide, and cost is lower.For building
Power station, compared to the scheme that PID effects are prevented using high performance encapsulating material, the cost of this device is lower.And compare use
PV negative busbars ground connection suppresses the scheme of PID effects, and the present apparatus is not only applicable to isolated form photovoltaic system, be also applied for it is non-every
Release photovoltaic system, it is wide using scope, and security is higher.
3rd, the present apparatus uses and recovery is compensated to photovoltaic group string, the compensation that can be optimized.I.e. in photovoltaic plant
In, the photovoltaic module for using of each group string has certain difference, in use for some time, the PID effects of each group string
Should also be not quite similar, post-compensation is monitored by the actual conditions that string is organized to each, can to the full extent realize optimization, and can
With analyze each group string there is the time of the situation of PID effects and appearance, can find as early as possible problem present in photovoltaic group string with
Just process.
Brief description of the drawings
The photovoltaic plant that Fig. 1 is provided for the present embodiment is with monitoring and suppress the apparatus structure frame that current potential induces attenuation effect
Figure；
The photovoltaic plant that Fig. 2 is provided for the present embodiment is with monitoring and suppress the device workflow that current potential induces attenuation effect
Figure；
The photovoltaic plant that Fig. 3 is provided for the present embodiment is with monitoring and suppress the device operation principle that current potential induces attenuation effect
Figure.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content for having read instruction of the present invention, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
The photovoltaic plant that Fig. 1 is provided for the present embodiment is with monitoring and suppress the apparatus structure frame that current potential induces attenuation effect
Figure, described photovoltaic plant is with monitoring and suppress current potential and induce the device of attenuation effect to mainly comprise the following steps：Charge
Control module, control of discharge module, clock module, data acquisition module, control calculation process module, battery module etc..Photovoltaic
Group string and battery module are all connected with charge control module, control of discharge module, and photovoltaic group string is also connected with data acquisition module, data
Acquisition module, clock module, battery module are all connected with controlling calculation process module, control calculation process module connection charge control
Module and control of discharge module.Monitoring and suppression to PID effects are realized by controlling calculation process module, battery module is control
Calculation process module for power supply processed.
The output cathode PV+ voltages of data acquisition module Real-time Collection photovoltaic group string, output negative pole PV- voltages, at ground connection
The battery condition of PE voltages and battery module, and it is sent to control calculation process module.
Clock module obtains the current time of system, and is sent to control calculation process module.
Control calculation process module uses DSP control panels, realizes the analytic operation of system, and then control the startup of each module
And closing.
With reference to Fig. 2, if current time is night, photovoltaic group string does not produce voltage in theory, charge control module not work
Make.If now the voltage difference at the output negative pole PV- of photovoltaic group string and ground connection between PE exceedes the PID levels monitoring limit value of setting
When, then it is assumed that there is PID effects in photovoltaic plant, now applying backward voltage to photovoltaic group string by control of discharge module repaiies
It is multiple, suppress PID effects.
If current time is daytime, photovoltaic group string generates electricity and produces voltage, and control of discharge module does not work.If this time
Voltage difference is suitable for the chargeable range of battery module, and battery module between the output cathode PV+ and output negative pole PV- of volt group string
Electricity be in underfill state when, battery module is charged by charge control module.Data acquisition module is to battery
The electricity of module carries out monitor in real time, when battery module is full of, stops charging.
Determine that current time is as follows for the method on night or daytime：It is night to set a period of time scope, by clock mould
Block obtains the current time of system, and the time of acquisition is contrasted with the time range of setting, if the time for obtaining is in setting
Time range in, then it is assumed that it, at night, is otherwise daytime to be.
With reference to Fig. 3, the present embodiment provide photovoltaic plant with monitor and suppress current potential induce attenuation effect device it is main
Photovoltaic plant is applied to, device can be accessed at the collector-shoe gear of photovoltaic group string, as shown in figure 3, PV+ accesses collector-shoe gear
Positive pole, PV- accesses the negative pole of collector-shoe gear, and PE is accessed at component housing ground connection.
The output positive and negative electrode of photovoltaic group string connects charge control module by switching K1, and charge control module is by switch
K3 connects battery module；The output negative pole and earthing pole of photovoltaic group string connect control of discharge module, control of discharge by switching K2
Module connects battery module by switching K4；Data acquisition module connects the output positive and negative electrode of photovoltaic group string, earthing pole, and electricity
Pond module；Control calculation process module connection data acquisition module, battery module, switch K1, switch K2, switch K3, switch K4
And clock module.
Switch K1 is connected with switch K2 using the interlock switch component that Perfect Time is controlled, and realizes chain control.Night
When, K1 disconnects, K2 closures；During daytime, K2 disconnects, K1 closures.
Charge control module is defeated for step-down charging circuit, including MOSFET pipes Q1, MOSFET pipe Q1 source electrode connecting valves K1
Go out proper pole, MOSFET pipes Q1 drain electrode connections diode D1 negative poles and inductance L1 one end, inductance L1 other ends connection electric capacity C1 mono-
End and switch K3 input anodes, electric capacity C1 other end connecting valve K3 input cathodes, diode D1 positive poles and switch K1 are defeated
Go out to hold negative pole；The input positive and negative electrode for switching K1 connects the output positive and negative electrode of photovoltaic group string respectively；Switch K3 output rectify,
Negative pole connects the positive and negative electrode of battery module respectively.
In charge control module, diode D1 plays afterflow, when MOSFET pipes Q1 is turned off for the electric current of inductance L1 is carried
For afterflow effect, inductance L1 is used for energy transmission, and electric capacity C1 is filter capacitor.
Control of discharge module is boost conversion circuit (boost), including electric capacity C2, electric capacity C2 one end connecting valve K2 outputs
The input cathode of end negative pole, the colelctor electrode of IGBT pipes Q2 and switch K4, the output of electric capacity C2 other end connecting valves K2 is rectified
Pole and the negative pole of diode D2, the emitter stage of the positive pole connection IGBT pipes Q2 of diode D2 and inductance L2 one end, inductance L2 are another
Hold the input anode of connecting valve K4；Switch K2 input positive and negative electrode connect respectively photovoltaic group string output negative pole PV- and
PE at ground connection, the defeated place end positive and negative electrode for switching K4 connects the positive and negative electrode of battery module respectively.
In control of discharge module, diode D2 plays afterflow, when IGBT pipes Q2 is turned off for the electric current of inductance L2 is provided
Afterflow is acted on, and inductance L2 is used for energy transmission, and electric capacity C2 is filter capacitor.
After starter, the first step needs to carry out system parameter setting, including the monitoring of time range parameter, PID levels
Limit value etc..According to conventional monitoring data, and geographical position residing for photovoltaic plant or system performance etc. are set.
Then, the PID situations to power station are monitored.Data acquisition module carries out data acquisition to photovoltaic plant, including
The output cathode PV+ voltages of photovoltaic group string, output negative pole PV- voltages, at ground connection PE voltages and battery module battery condition.Number
After the completion of according to collection, system time is obtained by clock module.
If at night, photovoltaic group string does not produce the switch K1 of electricity, device to disconnect in theory, switch K2 closures, and switch
K3 disconnects.Voltage difference at the output negative pole PV- that will be collected and ground connection between PE monitors limit value with the PID levels of default
It is compared：If monitoring limit value less than PID levels, then it is assumed that photovoltaic plant disconnects without PID effects, switch K4；If being higher than PID water
Flat monitoring limit value, then it is assumed that photovoltaic plant is set up has PID effects, switch K4 closures, control of discharge module starts, to photovoltaic group
String applies direction voltage and is repaired.After pressurization 1 hour, switch K4 disconnects, resurvey at output negative pole PV- and ground connection PE it
Between voltage difference, if still greater than PID levels monitor limit value, switch K4 re-close, to photovoltaic module apply direction voltage
Repaired；If being less than or equal to PID levels monitoring limit value, switch K4 is remained off.
If on daytime, photovoltaic group string generates electricity and produces voltage, switch K1 closures, switch K2 to disconnect, and switch K4 disconnects.Control
The output cathode PV+ voltages of the photovoltaic group string that calculation process module analysis actual acquisition processed is arrived, output negative pole PV- voltages, if light
The magnitude of voltage of volt group string is suitable for charging battery module scope, and data collecting module collected to battery data show battery electricity
Measure during for underfill state, switch K3 closures, photovoltaic group string is charged by charge control module to battery module.Data are adopted
Collection module carries out monitor in real time to the electricity of battery, and when battery shows full state, switch K3 disconnects.
The present invention carries out the monitoring of PID at night according to ionization principle of reversibility to component, according to situation about monitoring, leads to
The method for applying DC voltage between component electrode and frame to repair ionization is crossed, on the premise of not influenceing system to generate electricity,
Reach the purpose of rebuilt component PID.By a series of it is demonstrated experimentally that using monitoring simultaneously using the photovoltaic plant that the present embodiment is provided
Suppress the device that current potential induces attenuation effect, the component recovery for PID phenomenons occur can be made normal.
Claims (10)
1. a kind of photovoltaic plant includes photovoltaic group string and electricity with monitoring and suppressing the device that current potential induces attenuation effect, photovoltaic plant
Pond module, it is characterised in that described device includes：
For the charge control module for controlling photovoltaic group string to charge battery module；
When inducing attenuation effect for appearance potential, control battery module applies the control of discharge mould of backward voltage to photovoltaic group string
Block；
For gather the output cathode voltage of photovoltaic group string, output negative pole voltage, at ground connection voltage and battery module electricity shape
The data acquisition module of condition；
For the clock module of acquisition system current time；
For the data gathered according to data acquisition module and clock module, treatment is analyzed, and then control charge control
The control calculation process module of the start and stop work of module and control of discharge module.
2. a kind of photovoltaic plant as claimed in claim 1 is with monitoring and suppress the device that current potential induces attenuation effect, its feature
It is：The photovoltaic group string and battery module are all connected with charge control module, control of discharge module, and photovoltaic group string is also connected with data
Acquisition module, data acquisition module, clock module, battery module are all connected with controlling calculation process module, control calculation process mould
Block is also connected with charge control module and control of discharge module.
3. a kind of photovoltaic plant as claimed in claim 1 is with monitoring and suppress the device that current potential induces attenuation effect, its feature
It is：It is described to control calculation process module for DSP control panels.
4. a kind of photovoltaic plant as claimed in claim 1 is with monitoring and suppress the device that current potential induces attenuation effect, its feature
It is：The output positive and negative electrode of the photovoltaic group string connects charge control module by switching K1, and charge control module is by switch
K3 connects battery module；The output negative pole and earthing pole of photovoltaic group string connect control of discharge module, control of discharge by switching K2
Module connects battery module by switching K4；Data acquisition module connects the output positive and negative electrode of photovoltaic group string, earthing pole, and electricity
Pond module；Control calculation process module connection data acquisition module, battery module, switch K1, switch K2, switch K3, switch K4
And clock module.
5. a kind of photovoltaic plant as claimed in claim 4 is with monitoring and suppress the device that current potential induces attenuation effect, its feature
It is：The switch K1 is connected with switch K2 using the interlock switch component of time control, realizes chain control；During night,
K1 disconnects, K2 closures；During daytime, K2 disconnects, K1 closures.
6. a kind of photovoltaic plant as claimed in claim 4 is with monitoring and suppress the device that current potential induces attenuation effect, its feature
It is：The charge control module is defeated for step-down charging circuit, including MOSFET pipes Q1, MOSFET pipe Q1 source electrode connecting valves K1
Go out proper pole, MOSFET pipes Q1 drain electrode connections diode D1 negative poles and inductance L1 one end, inductance L1 other ends connection electric capacity C1 mono-
End and switch K3 input anodes, electric capacity C1 other end connecting valve K3 input cathodes, diode D1 positive poles and switch K1 are defeated
Go out to hold negative pole；The input positive and negative electrode for switching K1 connects the output positive and negative electrode of photovoltaic group string respectively；Switch K3 output rectify,
Negative pole connects the positive and negative electrode of battery module respectively.
7. a kind of photovoltaic plant as described in claim 4 or 6 is with monitoring and suppressing the device that current potential induces attenuation effect, and it is special
Levy and be：The control of discharge module is boost conversion circuit, including electric capacity C2, electric capacity C2 one end connecting valve K2 output end is born
Pole, the colelctor electrode of IGBT pipes Q2 and switch K4 input cathode, the output head anode of electric capacity C2 other end connecting valves K2 and
The negative pole of diode D2, the emitter stage of the positive pole connection IGBT pipes Q2 of diode D2 and inductance L2 one end, the inductance L2 other ends connect
Connect the input anode of switch K4；The input positive and negative electrode for switching K2 connects output negative pole PV- and the ground connection of photovoltaic group string respectively
Place PE, the defeated place end positive and negative electrode for switching K4 connects the positive and negative electrode of battery module respectively.
8. a kind of photovoltaic plant with monitor and suppress current potential induce attenuation effect method, it is characterised in that：Will using such as right
The photovoltaic plant described in 1~7 any one is asked to be with monitoring and suppressing the device that current potential induces attenuation effect, step：
The output cathode voltage of data acquisition module Real-time Collection photovoltaic group string, output negative pole voltage, voltage and battery at ground connection
The battery condition of module, and it is sent to control calculation process module；The current time of clock module real-time acquisition system, and send
Give control calculation process module；
If current time is night, photovoltaic group string does not produce voltage in theory, and charge control module does not work；If now photovoltaic
When voltage difference between the output negative pole of group string and ground connection exceedes the PID levels monitoring limit value of setting, then it is assumed that photovoltaic plant
There is PID effects, now applying backward voltage to photovoltaic group string by control of discharge module repairs, and suppresses PID effects；
If current time is daytime, photovoltaic group string generates electricity and produces voltage, and control of discharge module does not work；If now photovoltaic group
Voltage difference between the output cathode and output negative pole of string is in the chargeable range of battery module, and the electricity of battery module is in
During underfill state, charge control module is opened, battery module is charged；Electricity of the data acquisition module to battery module
Monitor in real time is carried out, when battery module is full of, stops charging.
9. a kind of photovoltaic plant as claimed in claim 6 is with monitoring and suppress the method that current potential induces attenuation effect, its feature
It is to determine that current time is as follows for the method on night or daytime：It is night to set a period of time scope, is adopted by clock module
The current time of collecting system, by the time of collection with setting time range contrasted, if collection time setting when
Between in the range of, then it is assumed that it, at night, is otherwise daytime to be.
10. a kind of photovoltaic plant as claimed in claim 6 is with monitoring and suppress the method that current potential induces attenuation effect, its feature
It is, it is described as follows to the method that photovoltaic group string applying backward voltage is repaired by control of discharge module：Control of discharge mould
After block applies backward voltage setting time to photovoltaic group string, control of discharge module is closed, the output for resurveying photovoltaic group string is born
Voltage difference between pole and ground connection, if monitoring limit value still greater than PID levels, reopens control of discharge module, to light
Volt component applies direction voltage and is repaired；Aforesaid operations are repeated, until between the output negative pole of photovoltaic group string and ground connection
Voltage difference monitors limit value less than or equal to PID levels, then control of discharge module is remained off.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152565A (en) * | 2019-06-26 | 2020-12-29 | 汉能移动能源控股集团有限公司 | PID repairing method and system |
| CN113345980A (en) * | 2021-05-28 | 2021-09-03 | 普洛德(上海)智能科技有限公司 | Photovoltaic cell panel restorer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120326511A1 (en) * | 2011-06-27 | 2012-12-27 | Lars Johnson | Methods and apparatus for controlling operation of photovoltaic power plants |
| CN103137730A (en) * | 2013-02-01 | 2013-06-05 | 常州亿晶光电科技有限公司 | Method and structure for avoiding or reducing crystalline silicon photovoltaic assembly potential induction damping |
| CN104065102A (en) * | 2014-02-24 | 2014-09-24 | 青岛创铭新能源有限公司 | Microgrid control device of photovoltaic distributed power supply |
| CN204068851U (en) * | 2014-09-17 | 2014-12-31 | 英利能源（中国）有限公司 | Inverter |
| CN105356445A (en) * | 2015-12-21 | 2016-02-24 | 常熟开关制造有限公司(原常熟开关厂） | PID (proportion, integration and differentiation) effect inhibition device for photovoltaic power generation system and photovoltaic power generation system |
| CN105577108A (en) * | 2016-02-04 | 2016-05-11 | 苏州高创特新能源发展股份有限公司 | Device and method for inhibiting PID effect of crystalline silicon photovoltaic power station |
-
2017
- 2017-01-09 CN CN201710014111.1A patent/CN106712253B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120326511A1 (en) * | 2011-06-27 | 2012-12-27 | Lars Johnson | Methods and apparatus for controlling operation of photovoltaic power plants |
| CN103137730A (en) * | 2013-02-01 | 2013-06-05 | 常州亿晶光电科技有限公司 | Method and structure for avoiding or reducing crystalline silicon photovoltaic assembly potential induction damping |
| CN104065102A (en) * | 2014-02-24 | 2014-09-24 | 青岛创铭新能源有限公司 | Microgrid control device of photovoltaic distributed power supply |
| CN204068851U (en) * | 2014-09-17 | 2014-12-31 | 英利能源（中国）有限公司 | Inverter |
| CN105356445A (en) * | 2015-12-21 | 2016-02-24 | 常熟开关制造有限公司(原常熟开关厂） | PID (proportion, integration and differentiation) effect inhibition device for photovoltaic power generation system and photovoltaic power generation system |
| CN105577108A (en) * | 2016-02-04 | 2016-05-11 | 苏州高创特新能源发展股份有限公司 | Device and method for inhibiting PID effect of crystalline silicon photovoltaic power station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152565A (en) * | 2019-06-26 | 2020-12-29 | 汉能移动能源控股集团有限公司 | PID repairing method and system |
| CN113345980A (en) * | 2021-05-28 | 2021-09-03 | 普洛德(上海)智能科技有限公司 | Photovoltaic cell panel restorer |
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