CN106253330A - A kind of photovoltaic power optimizes system - Google Patents
A kind of photovoltaic power optimizes system Download PDFInfo
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Classifications
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- H02J3/385—
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H02J13/0075—
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
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Abstract
The invention mainly relates to photovoltaic power and optimize system, have multiple photovoltaic modulies of series connection, each photovoltaic module is equipped with carrier wave sending module, for forming communication carrier on the transmission line concatenated photovoltaic module；Each photovoltaic module is equipped with carrier detect module, for extracting communication carrier on transmission line；The a part of photovoltaic module of at least a part of which is configured with wireless communication module: make at least some of photovoltaic module receive or send the first data being presented as wireless forms of communication by the wireless communication module of configuration；And/or photovoltaic module receives the second data of the communication carrier form that is presented as on transmission line by the carrier detect module of configuration.
Description
Technical field
The invention mainly relates to the electric device of solar electrical energy generation, exactly, be to have employed in each photovoltaic module
All employ the scheme of multilevel voltage change-over circuit so that any one step voltage change-over circuit all can be individually to corresponding
One battery strings performs independent maximum power point tracking calculation, it is ensured that stablizing of whole solar power system output.
Background technology
Along with the finiteness of the traditional energies such as similar oil, coal, natural gas, and the Negative environment that traditional energy causes
Problem is on the rise, economy, politics and the social environment being especially continually changing in the whole world big under the conditions of, find one take it
Not to the utmost, the regenerative resource gone round and begun again is to replace resource-constrained, to have environment traditional chemical industry energy of pollution to become the whole world
Important proposition in the urgent need to address.The new forms of energy of the most renewable, environmental protection and sustainability have increasingly obtained widely should
With, the development in science and technology based on new technique and new material so that regenerative resource obtains the development and utilization of modernization, as too
Sun energy, geothermal energy, wind energy, ocean energy, biomass energy and nuclear fusion energy etc..Owing to this new forms of energy of photovoltaic possess clearly
The advantage such as clean, safe and reliable, operating cost is few, regular maintenance is simple, anywhere can be used everywhere so that photovoltaic generation becomes generation
The common concern of various countries of boundary and the novel industry given priority to, photovoltaic industry worldwide have also been obtained development, light rapidly
Volt generating plays indispensable effect in the electrical problem solving remote districts.
The output characteristics of photovoltaic cell is affected by ambient temperature, light radiation intensity and is changed a lot, and makes
Photovoltaic cell can export the power of maximum all the time so that we more effectively utilize solar energy to be the basic of photovoltaic generating system
Requirement.Will export desired peak power from solar panel, most important is to find maximum power point MPPT, makes the defeated of cell panel
Go out voltage and output electric current is maintained at maximum power point expected from this.The change of maximum power point is generally and irradiation intensity and ring
Border temperature is relevant, so a difficult problem urgently to be resolved hurrily is, when the environmental change of solar panel, and these parameters of palpus dynamic tracing
Change, just can get rid of external environmental factor, it is ensured that solar panel is operated on maximum power point.The shade of photovoltaic cell component
Occlusion issue can cause the decay of photovoltaic module, normal attenuation scope to be that First Year is about 5%, after be less than in each year
0.8%, the numerical value not allowed more than that gets off for 25 years is about 20%.And decay inconsistent plus the product that dispatches from the factory inconsistent because of
Element, causes the generated energy of cell panel about may lose 3～5%.The reason causing assembly to decay is a lot, mainly includes producing
Manufacture factor and environmental factors etc., factor of wherein manufacturing specifically includes that production technology, self decay and degree of aging；Ring
Border factor specifically includes that cloud layer, fallen leaves, temperature, mounting inclination angle degree and orientation etc..
In existing photovoltaic power optimal way, it is nearly all to perform optimization in photovoltaic module level, in photovoltaic module level
Being optimized and mean individually to be optimized each independent battery strings, the most each photovoltaic module would generally wrap
Include multiple battery strings (Photovoltaic cell string) being made up of photovoltaic cell concatenation.When occurring with a string cell panel
Because homogeneity of product problem is bad, or occur the factor such as shadow occlusion cause percentage of batteries can not normal power generation time, whole string
Power conversion efficiency (pce) loss is very serious, and when the panel array that accesses of the most centralized inverter of inverter is a lot,
The cell panel that can cause each group string can not run at the maximum power point of oneself, and these are all the damages of electric energy and generated energy
Lose.Therefore the power optimization device that the application hereinafter introduces mainly solves to alleviate these problems in other words conj.or perhaps exactly, it is achieved at battery
Tandem does not carry out power optimization, to carry active power optimization device for each photovoltaic cell string, imports maximum power point tracking
To guarantee the stable of solar energy system output and the largest optimization of power.
Summary of the invention
In one embodiment, the invention provides a kind of photovoltaic power and optimize system, there are multiple photovoltaic groups of series connection
Part, wherein: described photovoltaic module is configured with carrier wave sending module and/or wireless communication module to realize the transmission of data, described
Carrier wave sending module is for forming communication carrier on the transmission line concatenated photovoltaic module；Described photovoltaic module is configured with load
Ripple detecting module and/or wireless communication module are to realize the reception of data, and described carrier detect module is at least in this transmission
Communication carrier is extracted on circuit；At least some of described photovoltaic module receives by the wireless communication module of configuration or sends and embodies
The first data for wireless forms of communication；And/or described photovoltaic module receives described transmission by the carrier detect module of configuration
Second data of the communication carrier form that is presented as on circuit.
Above-mentioned photovoltaic power optimizes system, and described carrier wave sending module at least includes the first switch and the electric capacity being serially connected
Device；
Send the stage of communication carrier at described carrier wave sending module, first switchs the process configured by described photovoltaic module
Device controls switching off and on switching between state, in order to is formed on transmission line and carries data carrier electric current.
Above-mentioned photovoltaic power optimizes system, the first switch that described carrier wave sending module includes being serially connected and capacitor and
First resistor, described carrier wave sending module also includes second resistor being connected in parallel on capacitor two ends.
Above-mentioned photovoltaic power optimizes system, and described carrier detect module includes that current detecting unit (sometimes can also claim
For current sensor) and wave filter, this current detecting unit is used for monitoring the current information on described transmission line, this wave filter
For extracting the default communication carrier signal with designated frequency range from described current information.
Above-mentioned photovoltaic power optimizes system, the first kind assembly in the middle of described photovoltaic module be configured with wireless communication module and
Its central Equations of The Second Kind assembly is then configured without wireless communication module；And the first kind assembly configuration processor receive wireless
During the first data that communication module is transmitted, its processor is passing by controlling the described carrier wave sending module of first kind assembly configuration
The second data characterizing the first data are formed on lines；And the described carrier detect module extraction of Equations of The Second Kind assembly configuration
These second data are also transferred to the processor of Equations of The Second Kind assembly.
Above-mentioned photovoltaic power optimizes system, and the first kind and Equations of The Second Kind assembly in described photovoltaic module are each equipped with channel radio
Letter module, the wireless communication module at Equations of The Second Kind assembly shielded (wireless communication module of such as some assembly by body of wall or its
He easily shields the entity structure of wireless signal to blocking or partly blocking and shielded signal) in the case of: first kind assembly configures
Processor receive wireless communication module transmission the first data time, its processor by control the first kind assembly configuration institute
State carrier wave sending module on transmission line, form the second data characterizing the first data；And the institute of Equations of The Second Kind assembly configuration
State carrier detect module extract these second data and be transferred to the processor of Equations of The Second Kind assembly.
Above-mentioned photovoltaic power optimizes system, also includes for being turned by the unidirectional current of the multistage described photovoltaic module of series connection output
Changing the inverter of alternating current into, the first wherein said data are sent by the Wireless Telecom Equipment that inverter is integrated.
Above-mentioned photovoltaic power optimizes system, and the first wherein said data are sent by a Wireless Telecom Equipment, should
Wireless Telecom Equipment is an independent terminal unit matching used with described photovoltaic module.
Above-mentioned photovoltaic power optimizes system, and each photovoltaic module all includes one-level photovoltaic cell string or multistage photovoltaic cell
String, each photovoltaic module is also configured with a power optimization device, and each power optimization device includes multilevel voltage change-over circuit, often
The voltage that corresponding one-level photovoltaic cell string produces all is carried out boosting or blood pressure lowering conversion output by voltage order one change-over circuit；
Wherein, the described power optimization device respective output voltage superposition of each self-configuring of described photovoltaic module of multiple concatenations
Together, as total output voltage of multiple described photovoltaic modulies.
Above-mentioned photovoltaic power optimizes system, and in each power optimization device, any one voltage conversion circuit all will be with
The voltage that the one-level photovoltaic cell string of its correspondence produces carries out voltage conversion and exports in an output capacitance, and each merit
Voltage conversion circuits at different levels respective output capacitance series connection in rate optimizer, and a described load of each photovoltaic module configuration
The output capacitance that ripple sending module concatenates with these is in parallel.
Above-mentioned photovoltaic power optimizes system, in each power optimization device: any one voltage conversion circuit will be with
The voltage that the one-level photovoltaic cell string of its correspondence produces carries out boosting or blood pressure lowering conversion output is in an output capacitance, and often
The respective output capacitance of multilevel voltage change-over circuit in one power optimization device is all cascaded, thus connected by these
In output capacitance, the voltage of institute's superposition provides the output voltage of each power optimization device.
Above-mentioned photovoltaic power optimizes system, and described voltage conversion circuit is the Buck circuit of voltage-dropping type, and each voltage is changed
Circuit all individually carries out maximum power point tracking calculation to a photovoltaic cell string, thus every voltage order one change-over circuit all will be with
The one-level photovoltaic cell string of its correspondence realizes the output of peak power.
Above-mentioned photovoltaic power optimizes system, also includes: set in the power optimization device that each photovoltaic module is configured
Put the second switch in its any one-level or multilevel voltage change-over circuit, at the voltage conversion circuit with second switch
In: its output capacitance and second switch are serially connected between one group of outfan of voltage conversion circuit.
Above-mentioned photovoltaic power optimizes system, and the described carrier wave sending module configured at each photovoltaic module sends communication load
The stage of ripple: processor that described second switch is configured by this photovoltaic module controls to switch to off state, with will be with this photovoltaic
The concatenation branch road that the respective output capacitance of voltage conversion circuits at different levels in the power optimization device that assembly matches is constituted gives
Open circuit；Until after the stage of described carrier wave sending module transmission communication carrier terminates, described second switch is just by described process
Device controls to switch to on-state.
Above-mentioned photovoltaic power optimizes system, and each photovoltaic module is also configured with a power module providing burning voltage,
The voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce is converted into stable voltage and is exported by this power module respectively,
The voltage that photovoltaic cell strings the most at different levels produce flows to this power module by diode respectively；And/or this power module general
The output voltage of one power optimization device of configuration corresponding with this photovoltaic module is converted into stable voltage and is exported.
Above-mentioned photovoltaic power optimizes system, on the rank of the carrier wave sending module transmission communication carrier that each photovoltaic module configures
Section: the voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce only is carried out by the power module limiting the configuration of each photovoltaic module
Gather and be converted into stable voltage and exported, and do not gather the output voltage of power optimization device.
Above-mentioned photovoltaic power optimizes system, also includes for being turned by the unidirectional current of the multistage described photovoltaic module of series connection output
Changing the inverter of alternating current into, described inverter includes a carrier detect module；And at least one described photovoltaic module
The processor of configuration is when receiving first data of wireless communication module transmission of this photovoltaic module configuration, and its processor is by control
The described carrier wave sending module making the configuration of this photovoltaic module forms the second data characterizing the first data on transmission line；With
And
The described carrier detect module of described inverter configuration is extracted these second data and is transferred to the processor of inverter.
Above-mentioned photovoltaic power optimizes system, also includes a data acquisition equipment with carrier detect module, for right
The appointment parameter of described photovoltaic cell is acquired；The processor of described photovoltaic module configuration is joined by controlling described photovoltaic module
The described carrier wave sending module put forms the communication carrier data characterizing described appointment parameter on transmission line；Described data
Collecting device utilize with carrier detect module extract on this transmission line and illustrate the communication carrier of described appointment parameter,
Thus collect the described appointment parameter information of described photovoltaic cell.
In one embodiment, the invention provides a kind of photovoltaic power and optimize the data communications method of system, described light
Volt power optimized system has multiple photovoltaic modulies of series connection: in described photovoltaic power optimization system: described photovoltaic module is joined
Being equipped with carrier wave sending module and/or wireless communication module to realize the transmission of data, described carrier wave sending module is in concatenation
Rise and on the transmission line of photovoltaic module, form communication carrier；Described photovoltaic module is configured with carrier detect module and/or channel radio
Letter module is to realize the reception of data, and described carrier detect module is at least for extracting communication carrier on this transmission line；Its
Described in data communications method include: utilize Wireless Telecom Equipment to the described nothing of all of each self-configuring of described photovoltaic module
Line communication module sends data, Wireless Telecom Equipment directly communicate with all of described photovoltaic module；Or utilize channel radio
Letter equipment sends the first data, described in Part I to the described wireless communication module of photovoltaic module configuration described in Part I
The processor of photovoltaic module configuration is when receiving the first data of wireless communication module transmission, and its processor is by controlling first
The described carrier wave sending module of the photovoltaic module configuration described in point forms the data letter characterizing the first data on transmission line
Second data of breath；And described in Part II photovoltaic module configuration described carrier detect module extract on transmission line
These second data, it is achieved Wireless Telecom Equipment directly communicates with photovoltaic module described in Part I, and Wireless Telecom Equipment and
Photovoltaic module described in two parts is indirect communication by the way of data retransmission (relays of the i.e. first data to the second data).
Above-mentioned method, described carrier wave sending module at least includes the first switch and the capacitor being serially connected；Described
Carrier wave sending module sends the stage of communication carrier, the first processor of being configured by described photovoltaic module of switch control turning off and
Switch between on-state, in order on transmission line, form the carrier current carrying data.
Above-mentioned method, described carrier detect module includes current sensor and wave filter, and this current sensor is used for supervising
Surveying the current information on described transmission line, this wave filter has designated frequency range for extracting from described current information
Preset communication carrier signal.
Above-mentioned method, described carrier wave sending module includes the first switch and capacitor and the first resistance being serially connected
Device, and described carrier wave sending module also includes second resistor being connected in parallel on capacitor two ends.
Above-mentioned method, described photovoltaic power optimizes system and also includes for by the multistage described photovoltaic module output of series connection
The inverter of converting direct-current power into alternating-current power, wherein said Wireless Telecom Equipment is integrated in described inverter.
Above-mentioned method, Wireless Telecom Equipment is an independent terminal unit matching used with described photovoltaic module.
Above-mentioned method, each photovoltaic module all includes that multistage photovoltaic cell string, each photovoltaic module are also configured with one
Power optimization device, each power optimization device includes multilevel voltage change-over circuit, and every voltage order one change-over circuit all will be right with it
The voltage that the one-level photovoltaic cell string answered produces carries out boosting or blood pressure lowering conversion output；The described photovoltaic module of multiple concatenations is each
The described respective output voltage of power optimization device of configuration is superimposed, and always exports electricity as multiple described photovoltaic modulies
Pressure.
Above-mentioned method, in each power optimization device, any one voltage conversion circuit is all by corresponding one
The voltage that level photovoltaic cell string produces carries out voltage conversion and exports in an output capacitance, and in each power optimization device
The respective output capacitance of voltage conversion circuits at different levels is connected, and a described carrier wave sending module of each photovoltaic module configuration
The output capacitance concatenated with these is in parallel.
Above-mentioned method, in each power optimization device: any one voltage conversion circuit is by corresponding one
The voltage that level photovoltaic cell string produces carries out boosting or blood pressure lowering conversion output is in an output capacitance, and each power is excellent
The respective output capacitance of multilevel voltage change-over circuit changed in device is all cascaded, thus in the output capacitance connected by these
The voltage of institute's superposition provides the output voltage of each power optimization device.
Above-mentioned method, described voltage conversion circuit is the Buck circuit of voltage-dropping type, and each voltage conversion circuit is the most independent
One photovoltaic cell string is carried out maximum power point tracking calculation, thus every voltage order one change-over circuit is all by corresponding one
Level photovoltaic cell string realizes the output of peak power.
Above-mentioned method, also includes in the power optimization device that each photovoltaic module is configured: be arranged on appointing of it
Anticipate the second switch in one or more levels voltage conversion circuit, in a voltage conversion circuit with second switch: it is defeated
Go out electric capacity and second switch is serially connected between one group of voltage output end of this voltage conversion circuit.
Above-mentioned method, the stage at the described carrier wave sending module transmission communication carrier that each photovoltaic module configures:
The processor that described second switch is configured by this photovoltaic module controls to switch to off state, with will be with this photovoltaic module phase
The concatenation branch road that the respective output capacitance of voltage conversion circuits at different levels in the power optimization device joined is constituted gives open circuit；
Until after the stage of described carrier wave sending module transmission communication carrier terminates, described second switch is just by described
Reason device controls to switch to on-state.
Above-mentioned method, each photovoltaic module is also configured with a power module providing burning voltage, this power module
Respectively the voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce is converted into stable voltage to be exported, light the most at different levels
The voltage that volt battery strings produces flows to this power module by diode respectively；And/or this power module will be with this photovoltaic group
The output voltage of one power optimization device of part correspondence configuration is converted into stable voltage and is exported.
Above-mentioned method, the stage at the described carrier wave sending module transmission communication carrier that each photovoltaic module configures:
The voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce only is adopted by the power module limiting the configuration of each photovoltaic module
Collect and be converted into stable voltage and exported, and do not gather the output voltage of power optimization device.
Above-mentioned method, utilizes an inverter by total output voltage conversion of the multistage described photovoltaic module output of series connection
Becoming alternating current, described inverter includes a carrier detect module；The processor of at least one described photovoltaic module configuration is being received
During the first data of the wireless communication module transmission configured to this photovoltaic module, its processor configures by controlling this photovoltaic module
Described carrier wave sending module on transmission line, form the second data of the data message characterizing the first data；And it is described
The described carrier detect module of inverter configuration extracts these second data to realize described inverter and at least some of described light
The information of photovoltaic assembly is mutual.
Above-mentioned method, also utilizes the data acquisition equipment with the carrier detect module finger to described photovoltaic cell
Determine parameter to be acquired；The processor of described photovoltaic module configuration sends by controlling the described carrier wave of described photovoltaic module configuration
Module forms the communication carrier data characterizing described appointment parameter on transmission line；Described data acquisition equipment utilize with
Carrier detect module on this transmission line, extract the communication carrier illustrating described appointment parameter, thus collect described light
The described appointment parameter information of volt battery.
In one embodiment, the invention provides a kind of photovoltaic power and optimize system, there are multiple photovoltaic groups of series connection
Part: each photovoltaic module all includes one-level photovoltaic cell string or multistage photovoltaic cell string, each photovoltaic module is also configured with one
Power optimization device, each power optimization device includes one or more levels voltage conversion circuit, and every voltage order one change-over circuit is all incited somebody to action
The voltage that corresponding one-level photovoltaic cell string produces carries out boosting or blood pressure lowering conversion output；Multiple described photovoltaic modulies are each
The described respective output voltage of power optimization device of configuration is superimposed, and always exports electricity as multiple described photovoltaic modulies
Pressure.
In an alternate embodiment of the invention, all of described photovoltaic module is configured with wireless communication module.Therefore user is permissible
Wireless Telecom Equipment is utilized to send data to the described wireless communication module of all of each self-configuring of described photovoltaic module, it is achieved by
Wireless Telecom Equipment directly communicates with all of described photovoltaic module, but if a portion photovoltaic module configuration wireless
Communication module by signal shielding or its radio communication function lost efficacy/the best time, then receive data by wireless communication module
Data retransmission (use with carrier wave sending module relay) cannot be received by those photovoltaic modulies again by wireless communication module
To data other photovoltaic modulies (use with carrier receiving module receive data).
Above-mentioned photovoltaic power optimizes system, also includes for the unidirectional current by the multistage described photovoltaic module output of series connection
It is converted into the inverter of alternating current, realizes between a Wireless Telecom Equipment and the described wireless communication module integrated by inverter
Data mutual.
Above-mentioned photovoltaic power optimizes system, also includes that one sets with the matching used radio communication of described photovoltaic module
Standby, this Wireless Telecom Equipment is an independent terminal unit matching used with described photovoltaic module, by this terminal unit and
The mutual of data is realized between described wireless communication module.
Above-mentioned photovoltaic power optimizes system, in each power optimization device, any one voltage conversion circuit all incite somebody to action
The voltage that corresponding one-level photovoltaic cell string produces carries out voltage conversion and exports in an output capacitance, and each
Voltage conversion circuits at different levels respective output capacitance series connection in power optimization device, and described in of each photovoltaic module configuration
The output capacitance that carrier wave sending module concatenates with these is in parallel.
Above-mentioned photovoltaic power optimizes system, in each power optimization device: any one voltage conversion circuit will
The voltage that corresponding one-level photovoltaic cell string produces carries out boosting or blood pressure lowering conversion output is in an output capacitance, and
The respective output capacitance of multilevel voltage change-over circuit in each power optimization device is cascaded, thus is connected by these
Output capacitance on the voltage of institute's superposition the output voltage of each power optimization device is provided.
Above-mentioned photovoltaic power optimizes system, and described voltage conversion circuit is the Buck circuit of voltage-dropping type, and each voltage turns
Change circuit and all individually a photovoltaic cell string carried out maximum power point tracking calculation, thus every voltage order one change-over circuit all incite somebody to action
Corresponding one-level photovoltaic cell string realizes the output of peak power.
Above-mentioned photovoltaic power optimizes system, also includes in the power optimization device that each photovoltaic module is configured:
It is arranged on the second switch in its any one-level or multilevel voltage change-over circuit, at the voltage conversion circuit with second switch
In: its output capacitance and second switch are serially connected between one group of outfan of voltage conversion circuit.
Above-mentioned photovoltaic power optimizes system, and the described carrier wave sending module configured at each photovoltaic module sends communication
The stage of carrier wave: the processor that described second switch is configured by this photovoltaic module controls to switch to off state, with will be with
The concatenation that the respective output capacitance of voltage conversion circuits at different levels in the power optimization device that this photovoltaic module matches is constituted is propped up
Road gives open circuit；Until after the stage of described carrier wave sending module transmission communication carrier terminates, described second switch is just by described
Processor control switch to on-state.
Above-mentioned photovoltaic power optimizes system, and each photovoltaic module is also configured with a power supply mould providing burning voltage
Block, the voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce is converted into stable voltage and gives defeated by this power module respectively
Going out, the voltage that photovoltaic cell strings the most at different levels produce flows to this power module by diode respectively；And/or this power module
The output voltage of one power optimization device of configuration corresponding with this photovoltaic module is converted into stable voltage exported.
Above-mentioned photovoltaic power optimizes system, on the rank of the carrier wave sending module transmission communication carrier that each photovoltaic module configures
Section:
Limit the electricity that the photovoltaic cell strings at different levels of this photovoltaic module are only produced by the power module of each photovoltaic module configuration
Pressure is acquired and is converted into stable voltage and exported, and does not gather the output voltage of power optimization device.
Above-mentioned photovoltaic power optimizes system, also includes for the unidirectional current by the multistage described photovoltaic module output of series connection
Being converted into the inverter of alternating current, described inverter includes a carrier detect module；And
The processor of at least one described photovoltaic module configuration passes at the wireless communication module receiving the configuration of this photovoltaic module
During defeated first data, its processor is by controlling described carrier wave sending module shape on transmission line of this photovoltaic module configuration
Become to characterize the second data of the first data；And
The described carrier detect module of described inverter configuration is extracted these second data and is transferred to the processor of inverter.
Above-mentioned photovoltaic power optimizes system, also include one with the data acquisition equipment of carrier detect module, be used for
The appointment parameter of described photovoltaic cell is acquired；The processor of described photovoltaic module configuration is by controlling described photovoltaic module
The described carrier wave sending module of configuration forms the communication carrier data characterizing described appointment parameter on transmission line；Described number
According to collecting device utilize with carrier detect module extracts on this transmission line illustrate described appointment parameter communication load
Ripple, thus collect the described appointment parameter information of described photovoltaic cell.
A kind of photovoltaic power of present disclosure optimizes system, has multiple photovoltaic modulies of series connection, wherein: each photovoltaic
Assembly all includes that one or more levels photovoltaic cell string, each photovoltaic module are also configured with a power optimization device, and each power is excellent
Changing device and all include one or more levels voltage conversion circuit, every voltage order one change-over circuit is all by corresponding one-level photovoltaic cell
The voltage that string produces carries out boosting or blood pressure lowering conversion output；The described power optimization device of multiple each self-configurings of described photovoltaic module is each
From output voltage be superimposed, as total output voltage of multiple described photovoltaic modulies；Described photovoltaic module is configured with load
Ripple sending module and/or wireless communication module are to realize the transmission of data, and described carrier wave sending module is for concatenating photovoltaic
Communication carrier is formed on the transmission line of assembly；And described photovoltaic module is configured with carrier detect module and/or radio communication
Module is to realize the reception of data, and described carrier detect module is at least for extracting communication carrier on this transmission line.
Above-mentioned photovoltaic power optimizes system, each electricity performing maximum power point tracking in described power optimization device
Voltage conversion circuit all includes: be connected respectively to the first input of the corresponding positive terminal of one-level photovoltaic cell string, negative pole end
End, the second input, and the first and second output nodes of output voltage, the output of the most each voltage conversion circuit are provided
Electric capacity is connected between its first and second output nodes, and one first switching switch and an inductance connection are in the first input
Between end and the first output node, the second input and the second output node are coupled, and one second switching switch
Or fly-wheel diode is connected between an interconnecting nodes and the second output node between the first switching switch and inductance；Or
It is connected respectively to the corresponding positive terminal of one-level photovoltaic cell string, the first input end of negative pole end, second defeated
Entering end, and the first and second output nodes of offer output voltage, the output capacitance of the most each voltage conversion circuit connects
Between its first and second output nodes, one first switching switch and an inductance connection are at the second input and second
Between output node, first input end and the first output node are coupled, and one second switching switchs or afterflow two
Pole pipe is connected between an interconnecting nodes and the first output node between the first switching switch and inductance；
Wherein, power optimization device also including, in any one-level being arranged on it or multilevel voltage change-over circuit second opens
Close, in any one voltage conversion circuit with second switch: its output capacitance and second switch are serially connected in this one-level
Between first, second output node of voltage conversion circuit.
In the present invention, photovoltaic optimizer can realize communication from each other, thus learns each photovoltaic module (even battery
Sheet tandem is other) duty and learn the voltage of whole photovoltaic system.Inverter passes through Luo-coil, band filter, solution
Tune etc. realize the detection to each photovoltaic module, and this circuit is also integrated with arc-detection function.Inverter can also be real
Now photovoltaic optimizer is issued order, by adjustment interference electric current by photovoltaic optimizer Bye-byes, by individual loading slowly
They intelligence starts of voltage notification etc..In addition inverter notifies that by the way of electric current photovoltaic optimizer shuts down, and enters in other words
Protected mode, the circuit of this loading current is also used as the discharge circuit of inverter oneself internal capacitance simultaneously.At this
Long photovoltaic group string pattern, the output voltage that the most each photovoltaic optimizer draws oneself up can be realized, it is ensured that each whole light in bright
Volt group string can be connected more photovoltaic module, is unlikely to as traditional photovoltaic group string is due to the electricity of output under low temperature open circuit situation
Press through height, cause inverter needs more input voltage surplus.
These schemes with advantage such as: improving the generating efficiency of whole electricity generation system, locally photovoltaic damages and blocks
Or the generating efficiency of system is not affected by the negative factor such as the discordance of photovoltaic cell, installation discordance, also achieve
The optimization of cell piece tandem, the degree of depth excavated system effectiveness, also to the various parameters of each battery component by the way of communication
And reach observability.Also achieving the safety of photovoltaic system, when breaking down or keep in repair, photovoltaic group string can turn off, output
Voltage is zero.Improve the serial number of each photovoltaic group string, save the wiring cost of system.Improve the anti-of photovoltaic module
Hot spot ability, which enhances the life-span of cell piece.
Accompanying drawing explanation
Reading described further below and with reference to after the following drawings, inventive feature and advantage will be apparent to:
Fig. 1 is that after multiple photovoltaic cell is first connected, parallel connection carrys out the schematic diagram for inverter power supply again.
Fig. 2 is the schematic diagram of each photovoltaic cell component one add-on module of configuration.
Fig. 3 be multiple photovoltaic module be connected in series with inverter with radio receiving transmitting module realize the schematic diagram that communicates.
Fig. 4 is that multiple photovoltaic module is connected in series the schematic diagram realizing communicating with single terminal unit.
Fig. 5～7 is the schematic diagram of the power optimization device alternative of each photovoltaic module configuration.
Fig. 8 is the schematic diagram that multiple photovoltaic module concatenation is realized data transmission completely by radio communication.
Detailed description of the invention
Seeing Fig. 1, they combinations of the photovoltaic module PV_1 of series connection, PV_2 ... PV_N (N is the natural number more than 1) exist
Constituting a photovoltaic string group 101 together, multiple such photovoltaic string groups 101 are connected in parallel the common inverter 170 that produces again need to
The DC voltage wanted.Turn-off module 151 is connected to the positive pole of photovoltaic string group 101 and a storage capacitor C of inverter 170DC's
Between first end, turn-off module 152 is connected to negative pole and the electric capacity C of photovoltaic string group 101DCThe second end between.Turn-off module 151
When connecting with 152, photovoltaic string group 101 can be storage capacitor CDCPower supply, the otherwise storage capacitor C when they disconnectDCCannot be from
Photovoltaic string group 101 side captures voltage source.The direct voltage source produced at photovoltaic inversion field photovoltaic module needs to be converted into
Alternating current could realize grid-connected, and the direct current energy that photovoltaic string group 101 is provided by the effect of photovoltaic DC-to-AC converter 170 exactly changes conclusion of the business
Stream electric energy, to meet AC load or equipment is powered and grid-connected demand, inverter generally has single-phase or much the most equal three-phase is
Inverting.In order to simply explain the effect of inverter, the most exemplary main power of three phase full bridge that illustrates changes electricity
Road 171 (can also be single-phase or biphase and heterogeneous), the conventional EMC that three phase full bridge main circuit for power conversion 171 previous stage uses
The three-phase LC wave filter etc. that wave filter and rear stage use is all conventional means, and change-over circuit 171 can be by electric capacity in inverter
CDCThe DC voltage of upper storage is converted into alternating current, wherein the connection of the switching tube of each composition inverter bridge of change-over circuit 171
Or turn off the pulse width modulating signal PWM mainly sent by a controller not shown in figure and be driven and control.By
DC inverter is converted into alternating current by effect in the change-over circuit 171 of inverter exactly, and its alternative type is existing
Technology is the most more known, is the most not described in detail.
Seeing Fig. 2, photovoltaic module PV_1, the difference of PV_2 ... PV_N traditional with Fig. 1 are: be first each
Individual photovoltaic module PV_N is equipped with an add-on module COM_N with communication with driving force, furthermore is exactly each light
Photovoltaic assembly PV_N is equipped with the power optimization device OP_N of battery strings rank referred to hereafter.
Seeing Fig. 2, in a kind of photovoltaic power optimization system that the application relates to, similar with conventional scheme, it has
Multiple photovoltaic module PV_1, PV_2 ... the PV_N of series connection, they concatenation one photovoltaic string groups 101 of composition, and whole photovoltaic merit
The photovoltaic string group 101 then having one or more parallel connection in rate optimization system is powered for inverter 170.
Seeing Fig. 3, each photovoltaic module is equipped with carrier wave sending module 130, and carrier wave sending module 130 is mainly used in
Concatenate and formed communication carrier on the transmission line LAN of photovoltaic module PV_1, PV_2 ... PV_N.
Seeing Fig. 3, each photovoltaic module is equipped with carrier detect module 131, and carrier detect module 131 is at least used for
Communication carrier is extracted on transmission line LAN.The scheme of carrier detect module 131 has multiple, in this application carrier detect module
131 include that (current sensor can also be referred to as current detecting unit or Current Mutual Inductance mould to current sensor 131a in this application
Block etc.) and wave filter 131b, this current sensor 131a can be such as Hall element or air core coil sensor, encoding and decoding
Device or diverter etc., current sensor 131a is mainly used for monitoring the current information on transmission line LAN, such as power frequency component
Or harmonic component signal, or the such high-frequency impulse/transient current of similar surge etc., arc signal can also be detected equally
Arrive.And this wave filter 131b can be band filter etc., it is mainly used in the present invention detecting from current sensor 131a
Current information in screen and extract the default communication carrier signal with designated frequency range.It is to say, bandpass range choosing
The difference selected, band filter 102 can detect the upper frequency limit of different information, such as communication carrier from current information
It is typically below the greatest lower band of arc-level.
Seeing Fig. 3, at least some of photovoltaic module (such as PV_N) is configured with wireless communication module 133, although in theory
All of photovoltaic module PV_1, PV_2 ... PV_N can configure wireless communication module 133, but in order to cost with communicate
The consideration optimized, we only use wireless communication module 133 in a part of photovoltaic module, and at another part photovoltaic module
(such as PV_1) does not the most use wireless communication module.
Seeing Fig. 3, one of our purpose is: make at least some of photovoltaic module (such as PV_N) by the nothing of configuration
Line communication module 133 receives or sends the first data being presented as wireless forms of communication.In the fig. 3 embodiment, radio communication
Equipment 173 is integrated in inverter 170, notices that wireless communication module 133 described herein or Wireless Telecom Equipment 173 etc. are permissible
Use all existing radio communication systems such as WIFI, Zigbee, 433MHZ communication, infrared, bluetooth, GPS.Wireless Telecom Equipment
173 can be to send the first data under manual operation, when photovoltaic module PV_N receives the first number by wireless communication module 133
According to time, photovoltaic module PV_N configuration processor 132 can receive the first data that wireless communication module 133 transmits, once
Be the data needing to be transmitted to other photovoltaic modulies (such as PV_1) when processor 132 recognizes the first data, then processor 132 leads to
The carrier wave sending module 130 crossing control photovoltaic module PV_N configuration forms the number characterizing the first data on transmission line LAN
It is believed that the second data of breath, the second data are that the carrier format to carry on transmission line LAN occurs.Photovoltaic module PV_1 configures
Having carrier detect module 131, carrier detect module 131 identifies the communication of the second data for extracting on transmission line LAN
Carrier wave.
Therefore, the trend of signal is: the wireless signal (the first data) that Wireless Telecom Equipment 173 sends is by some photovoltaic groups
The wireless communication module 133 of part PV_N configuration captures, and then the processor 132 of photovoltaic module PV_N configuration can identify channel radio
The implication of the first data that letter module 133 transmits, needs to be forwarded to not join when processor 132 recognizes the first data
When putting those photovoltaic modulies PV_1 of wireless communication module 133, the processor 132 of photovoltaic module PV_N configuration can active drive carry
Ripple sending module 130 forms the carrier current carrying the second data on transmission line LAN, and processor 132 also can be composed
It is worth the second data and there is the frequency range specified.And what the photovoltaic module PV_1 being configured without wireless communication module 133 was mated
Carrier detect module 131 then can monitor the current information on transmission line LAN, and photovoltaic module by current sensor 131a
The wave filter 131b that PV_1 is mated is additionally operable to extract from the current information of current sensor 131a monitoring have assigned frequency
The default communication carrier signal (the second data signal on such as LAN) of scope, the second data are transferred to photovoltaic module further
The processor 132 of PV_1 configuration, and the implication of the second data is read by processor 132.Such as, the first data are radio communications
Start that equipment 173 sends or shutdown command, the processor 132 of photovoltaic module PV_N not only can make the optimizer OP_N of self hold
Machine or shutdown, photovoltaic module PV_N also can be transmitted to start or shutdown command other photovoltaic module, such as photovoltaic module PV_
1 when receiving the second data message due to the second data characterization the information of the first data, so the process of photovoltaic module PV_1
Device 132 also can indicate the optimizer OP_1 of self to be started shooting or shut down.
Seeing Fig. 4, be with the distinguishing characteristics of Fig. 3, the Wireless Telecom Equipment 173 sending the first data in Fig. 3 is with inverse
Become device 170 and integrate appearance, and the first data are sent by another Wireless Telecom Equipment 273 in the diagram, this nothing
Line communication equipment 273 is an independent terminal unit matching used with photovoltaic module, this terminal unit be similar to mobile phone/
Remote controllers etc., can send the wireless communication signals that wireless communication module 133 is capable of identify that.
Seeing Fig. 4, as option, inverter 170 also includes carrier detect module 131, the carrier detect of inverter 170
Module 131 can monitor the current information on transmission line LAN, and the wave filter of inverter 170 by current sensor 131a
131b is additionally operable to extract the default communication carrier with designated frequency range from the current information of current sensor 131a monitoring
Signal (the second data signal on such as LAN), the second data are transferred to the process not illustrated of inverter 170 further
Device, is read the implication of the second data by its processor.Now photovoltaic module PV_N is equivalent to be transmitted to start or shutdown command
Inverter 170, the letter represented due to this second data characterization the first data when inverter 170 receives the second data message
Breath, self boots up so the processor of inverter 170 also can indicate or shuts down, such as, also can indicate that the open circuit in Fig. 1
Device 151 and 152 disconnects.
First battery strings ST1 seeing Fig. 5, photovoltaic module PV_N utilizes the BUCK1 translation circuit of first buck
Producing the output of desired voltage, in BUCK1 circuit, inductance L1 and electric capacity C1 forms low pass filter, the first of BUCK1 circuit
Input node AN1 is connected to the anode of battery strings ST1, and the second input node CA1 of BUCK1 circuit is connected to the negative electrode of ST1, opens
Close S11 and inductance L1 and be connected on the first output node N of the first input node AN1 and BUCK1 circuitB1-1Between.Switch S11's
One end is connected with the first input node AN1 of BUCK1 circuit, but the opposite other end and the second of BUCK1 circuit of switch S11
Input node (or the second output node N of BUCK1 circuitB1-2Connect between) and have another to switch S12.Output capacitance C1 is even
It is connected on the first output node N of BUCK1 circuitB1-1With the second output node NB1-2Between.The ultimate principle of this translation circuit is:
First and second inputs of BUCK1 circuit capture supply voltage between the anode and negative electrode of first battery strings ST1, are opening
In the cycle of pass, allowing switch S11 connect and close S12, the electric current of inductance L1 increases and is electric capacity C1 charging, then allows switch S11 close
Break and connect S12, then the electric current of inductance L1 reduces and starts to release energy, and now connects S12 afterflow.BUCK1 translation circuit exists
The present invention is used for realize maximum power point tracking MPPT, in the industry cycle belongs to known technology due to MPPT, therefore concrete to it
It will not go into details for scheme.The realization of maximum power point tracking can by processor 132 drive switch S11～S12, switch S21～
S22, S31～S32 realize.
Second battery strings ST2 seeing Fig. 5, photovoltaic module PV_N utilizes the BUCK2 translation circuit of second buck
Producing the output of desired voltage, in BUCK2 circuit, inductance L2 and electric capacity C2 forms low pass filter, the first of BUCK2 circuit
Input node AN2 is connected to the anode of battery strings ST2, and the second input node CA2 of BUCK2 circuit is connected to the negative electrode of ST2, opens
Close S21 and inductance L2 and be connected on the first output node N of the first input node AN2 and BUCK2 circuitB2-1Between.Switch S21's
One end is connected with the first input node AN2 of BUCK2 circuit, but the opposite other end and the second of BUCK2 circuit of switch S21
Input node (or the second output node N of BUCK2 circuitB2-2, because node CA2 and node NB2-2Be connected) between connect and have
Another switchs S22.Output capacitance C2 is connected to the first output node N of BUCK2 circuitB2-1With the second output node NB2-2It
Between.
The 3rd battery strings ST3 seeing Fig. 5, photovoltaic module PV_N utilizes the BUCK3 translation circuit of the 3rd buck
Producing the output of desired voltage, in BUCK3 circuit, inductance L3 and electric capacity C3 forms low pass filter, the first of BUCK3 circuit
Input node AN3 is connected to the anode of battery strings ST3, and the second input node CA3 of BUCK3 circuit is connected to the negative electrode of ST3, opens
Close S31 and inductance L3 and be connected on the first output node N of the first input node AN3 and BUCK3 circuitB3-1Between.Switch S31's
One end is connected with the first input node AN3 of BUCK3 circuit, but the opposite other end and the second of BUCK3 circuit of switch S31
Input node (or the second output node N of BUCK3 circuitB3-2, because node CA3 and node NB3-2Be connected) between connect and have
Another switchs S32.Output capacitance C3 is connected to the first output node N of BUCK3 circuitB3-1With the second output node NB3-2It
Between.
In this application, temporarily as a example by three battery strings ST1～ST3 and three voltage conversion circuit BUCK1～BUCK3
Explain present invention spirit.Wherein, the second output node N of BUCK1 circuitB1-2The first output with BUCK2 circuit
Node NB2-1It is connected, the second output node N of BUCK2 circuitB2-2The first output node N with BUCK3 circuitB3-1It is connected, electric capacity
C1 and C2 and C3 is connected on the first output node N of BUCK1 circuitB1-1The second output node N with BUCK3 circuitB3-2Between.
It addition, carrier wave sending module 130 is also connected to the first output node N of BUCK1 circuitB1-1The second output with BUCK3 circuit
Node NB3-2Between, such as switch SBWith capacitor CBAnd resistor RBIt is connected on the first output node NB1-1With the second output node
NB3-2Between, and on position relationship, switch SBWith capacitor CBAnd resistor RBBoth position any in three is permissible
Arbitrarily exchange, it is also possible to a resistor R is setCIt is connected in parallel on capacitor CBTwo ends.
See Fig. 5, output capacitance C2 and a switch SWIIt is connected in series in the first output node of BUCK2 circuit
NB2-1With the second output node NB2-2Between.In other alternative embodiment, it is also possible to output capacitance C1 and switch S are setWI
It is connected in series in the first output node N of BUCK1 circuitB1-1With the second output node NB1-2Between, or output capacitance C3 is set
With switch SWIIt is connected in series in the first output node N of BUCK3 circuitB3-1With the second output node NB3-2Between.It is to say,
Switch SWIArbitrarily select and C1, C2, C3 thrin is connected.In other alternative embodiment, even can also be BUCK1's
First output node NB1-1With the second output node NB1-2Between series capacitance C1 and first switch SWI, also at the of BUCK2
One output node NB2-1With the second output node NB2-2Between series capacitance C2 and second switch SWI, simultaneously at the of BUCK3
One output node NB3-1With the second output node NB3-2Between series capacitance C3 and the 3rd switch SWI。
Seeing Fig. 3～4, the equal PV_N of photovoltaic module includes that multistage photovoltaic cell string ST1～ST3, photovoltaic module PV_N configure
A power optimization device OP_N, power optimization device OP_N is had all to include multilevel voltage change-over circuit BU1～BU3, voltage conversion electricity
The voltage that corresponding one-level photovoltaic cell string ST1 produces is carried out boosting or blood pressure lowering conversion output by road BU1, voltage conversion electricity
The voltage that corresponding one-level photovoltaic cell string ST2 produces is carried out boosting or blood pressure lowering conversion output by road BU2, voltage conversion electricity
The voltage that corresponding one-level photovoltaic cell string ST3 produces is carried out boosting or blood pressure lowering conversion output by road BU3, wherein, multiple
The photovoltaic module PV_1 of concatenation, PV_2 ... PV_N each correspondence are each configured with power optimization device OP_1, OP_2 ... OP_
The voltage V that N, optimizer OP_1, OP_2 ... OP_N each exportOUT1+VOUT2+……VOUTNIt is accumulated in together, as multiple
Photovoltaic module PV_1, total output voltage of PV_2 ... PV_N.Here voltage conversion circuit can use the BUCK electricity of Fig. 5
Road.
See Fig. 3～4, in power optimization device OP_N, one-level photovoltaic cell string corresponding for voltage conversion circuit BU1
The voltage that ST1 produces carries out voltage conversion and exports in output capacitance C1, corresponding for voltage conversion circuit BU2 one
The voltage that level photovoltaic cell string ST2 produces carries out voltage conversion and exports in output capacitance C2, voltage conversion circuit BU3
The voltage that corresponding one-level photovoltaic cell string ST3 produces carries out voltage conversion and exports in output capacitance C3.Merit
In rate optimizer OP_N, voltage conversion circuit BU1～BU3 at different levels respective electric capacity C1～C3 has series relationship.If definition merit
In rate optimizer OP_N, every voltage order one change-over circuit has the first output node and the second output node, then this voltage order one turns
Output capacitance C changing circuit is connected between its first output node and the second output node, and arbitrarily rear stage voltage
First output node of change-over circuit is connected with the second output node of its previous stage voltage conversion circuit, thus by C1～C3
Connected, thus on output capacitance C1 connected by these～C3, the voltage of institute's superposition is provided a power optimization device OP_N
Output voltage.And output capacitance C1 that concatenates with these of a carrier wave sending module 130 of photovoltaic module OP_N configuration～
C3 is in parallel, namely is equivalent to the head that carrier wave sending module 130 is connected in the multilevel voltage change-over circuit of power optimization device OP_N
First output node of individual first order voltage conversion circuit and the second output node of the afterbody voltage conversion circuit at end
Between.
See Fig. 6, and the difference of Fig. 5 is exactly: the switch S12 of BUCK1 circuit is replaced to diode D12, diode D12
Anode be connected to the negative electrode of ST1 and the second output node N of BUCK1 circuitB1-2, the negative electrode of diode D12 is connected to switch
The node of interconnection between S11 and inductance L1.Equally the switch S22 of BUCK2 circuit is replaced to diode D22, diode D22's
Anode links the negative electrode of ST2 and the second output node N of BUCK2B2-2, the negative electrode of diode D22 is connected to switch S21 and inductance
The node of interconnection between L2.Equally the switch S32 of BUCK3 circuit being replaced to diode D32, the anode of diode D32 is linked
The negative electrode of ST3 and the second output node N of BUCK3B3-2, the negative electrode of diode D32 is connected to switch between S31 and inductance L3 mutually
Node even.
See Fig. 7, and the difference of Fig. 5 is exactly: the structure of BUCK circuit is slightly changed.It is embodied in: BUCK1 circuit
First input node AN1 is connected to the anode of battery strings ST1, and the second input node CA1 of BUCK1 circuit is connected to the moon of ST1
Pole, switch S11 and inductance L1 is connected on the second output node N of the second input node CA1 and BUCK1 circuitB1-2Between.Switch
One end of S11 is connected with the second input node CA1 of BUCK1 circuit, but the opposite other end of switch S11 and BUCK1 circuit
The first input node (or the first input node AN1 of BUCK1 circuit, because node AN1 and node NB1-1It is connected) between
Connecting and have a diode D12, the anode of diode D12 is linked and is switched the node of interconnection between S11 and inductance L1, and diode
The negative electrode of D12 then links the first input node AN1.Electric capacity C1 is connected to the first output node N of BUCK1B1-1With the second output
Node NB1-2Between.
Seeing Fig. 7, similar, switch S21 and inductance L2 is connected on second input node CA2 and second of BUCK2 circuit
Output node NB2-2Between.Switch S21 one end be connected with second input node CA2 of BUCK2, this switch S21 relative another
First input node AN2 (or the second output node N of BUCK2 circuit of end and BUCK2 circuitB2-1, because node AN2 and
Node NB1-1Be connected) between connect and have a diode D22, the anode of diode D22 is linked between switch S21 and inductance L2 mutually
Node even, the negative electrode of diode D22 then links the first input node AN2.Electric capacity C2 is connected to first output node of BUCK2
NB2-1With the second output node NB2-2Between.
Seeing Fig. 7, similar, switch S31 and inductance L3 is connected on second input node CA3 and second of BUCK3 circuit
Output node NB3-2Between.Switch S31 one end be connected with second input node CA3 of BUCK3, this switch S31 relative another
First input node AN3 (or the second output node N of BUCK3 circuit of end and BUCK3 circuitB3-1, because node AN3 and
Node NB3-1Be connected) between connect and have a diode D32, the anode of diode D32 is linked between switch S31 and inductance L3 mutually
Node even, the negative electrode of diode D32 then links the first input node AN3.Electric capacity C3 is connected to first output node of BUCK3
NB3-1With the second output node NB3-2Between.
See Fig. 7, output capacitance C3 and a switch SWIIt is connected in series in the first output node of BUCK3 circuit
NB3-1With the second output node NB3-2Between.In other alternative embodiment, it is also possible to output capacitance C1 and switch S are setWI
It is connected in series in the first output node N of BUCK1 circuitB1-1With the second output node NB1-2Between, or output capacitance C2 is set
With switch SWIIt is connected in series in the first output node N of BUCK2 circuitB2-1With the second output node NB2-2Between.It is to say,
Switch SWIArbitrarily select and C1, C2, C3 thrin is connected.In other alternative embodiment, even can also be BUCK1's
First output node NB1-1With the second output node NB1-2Between series capacitance C1 and first switch SWI, the most also at BUCK2
The first output node NB2-1With the second output node NB2-2Between series capacitance C2 and second switch SWI, simultaneously at BUCK3
The first output node NB3-1With the second output node NB3-2Between series capacitance C3 and the 3rd switch SWI。
See the embodiment of Fig. 5～7, switch S11/S21/S31 and switch S12/S22/S32 can also claim in this application
For switching switch or synchro switch, diode D12/D22/D32 is referred to as fly-wheel diode in this application, and Fig. 7
In diode D12/D22/D32 can also substitute with three switching switches respectively, as long as meeting as conventional BUCK electric
Road can meet the use requirement of the application.Seeing the embodiment of Fig. 5～7, the photovoltaic optimizer of the application can be summarized as: at certain
In the N level photovoltaic cell string of one photovoltaic module and N step voltage change-over circuit, any K step voltage change-over circuit includes output
Electric capacity CK, natural number K meets N >=K >=1, the electric capacity C of any K step voltage change-over circuitKIt is connected to K step voltage change-over circuit
The first output node NBK-1With the second output node NBK-2Between.The voltage correspondence output that the photovoltaic cell string of K level provides exists
First output node N of the voltage conversion circuit of K levelBK-1With the second output node NBK-2Between.Additionally, also set up rear one
First output node of the voltage conversion circuit of level and the second output node phase of previous stage voltage conversion circuit adjacent thereto
Connect, thus we can be at the first output node N of first first order voltage conversion circuitB1-1Last N level electricity with end
Second output node N of voltage conversion circuitBN-2Between, produce and provide total output voltage of this N level photovoltaic cell string, due to this
In the ingredient of a N step voltage conversion substantially optimizer mated with a photovoltaic module, so this always exports electricity
Compacting matter is also the output voltage of an optimizer.In one photovoltaic module, total progression of photovoltaic cell string is equal to an optimizer
In total progression of voltage conversion circuit.Observe from the outside of photovoltaic module, defeated with the first of first order voltage conversion circuit
Egress NB1-1Connected one end and the second output node N with N step voltage change-over circuitBN-2The other end being connected is permissible
It is considered as a pair voltage output end mouth of a photovoltaic optimizer.
In other alternative embodiment, BUCK circuit can be replaced by buck BUCK/BOOST circuit, buck
Equally realize MPPT calculation.As long as sum it up, some voltage conversion circuit, it is possible to positive and negative by some battery strings
Voltage between pole is inputted, and then carries out maximum power point tracking, and exports voltage at the one of this voltage conversion circuit
The BUCK circuit in Fig. 5～7 can be replaced in output capacitance between group outfan.
Seeing Fig. 3～5, carrier wave sending module 130 at least includes the switch S being serially connectedBWith capacitor CB, send out at carrier wave
Send module 130 to send the stage of communication carrier, switch SBThe processor 132 configured by photovoltaic module OP_N controls turning off and connecing
Switch between logical state, in order to formed on transmission line LAN and carry data carrier electric current.In preferred embodiment, best
It is that the switch S that carrier wave sending module 130 includes being serially connected is setBWith capacitor CBAnd a resistor RB, but also arrange one
Individual resistor RCIt is connected in parallel on capacitor CBTwo ends.Including shunt capacitance CB, bypass resistance RBWith switch SBTelecommunication circuit in, can
With first maintained switch SBThe state being off, if processor 132 attempts to carry out information alternately with outside, processor 132
The driving signal sent quickly redirects into the second logic state (such as high level) then from the first logic state (such as low level)
It is returned to the first logic state, thus the switch S that can connect under high level drivesBIt is switched on and turns off.Or processor 132
It is right that the driving signal sent quickly redirects into the second logic state (such as low level) from the first logic state (such as high level)
After be returned to the first logic state, thus the switch S that can connect under low level drivesBIt is switched on and turns off, switch SBShould
On/off-pass process can be repeatedly.It is believed that controlling switch SBDrive signal there is the rising that intimate transient state redirects
Edge or trailing edge moment, can ON switch SBAnd produce and flow through the harmonic wave of carrier wave sending module 130 or claim carrier current, this carrier wave
Will be injected into and be connected to the first output node NB1-1Or it is connected to the second output node NB3-2On transmission line LAN on.Can
To utilize various carrier detection module 131a (such as air core coil sensor or high-frequency mutual inductor, band filter, solution coding
Device) from the current information flowed through transmission line, the carrier signal of extraction telecommunication circuit transmission is demodulated.This carrier wave is believed
Breath can be converted into binary element according to currently assigned various communication protocols and carry out the mutual of information.
Seeing Fig. 5～7, as a example by photovoltaic module PV_N, the carrier wave sending module 130 in photovoltaic module PV_N configuration sends
The stage of communication carrier: switch SWIControlled to switch to off state by a processor 132 of this photovoltaic module PV_N configuration, with
Voltage conversion circuit BUCK1～BUCK3 at different levels in the power optimization device OP_N that will match with this photovoltaic module PV_N are each
From output capacitance C1～C3 constitute concatenation branch road give open circuit.Until carrier wave sending module 130 sends the rank of communication carrier
After section terminates, switch SWIJust controlled to switch to on-state by processor 132, recover the concatenation branch road of output capacitance C1～C3
Path relation, to avoid electric capacity C1～C3 to absorb carrier signal.
Seeing Fig. 5～7, as a example by photovoltaic module PV_N, it is configured with the power module (DC/ that can provide steady voltage source
DC circuit) 190, the voltage that photovoltaic cell string ST1～ST3 at different levels of this photovoltaic module PV_N are produced by power module 190 respectively
Being converted into stable voltage to be exported, the voltage that wherein photovoltaic cell string ST1 produces flows to this power supply by diode D1
Module 190, such as the anode of the cathode connecting diode D1 of photovoltaic cell string ST1, the negative electrode of diode D1 then links power module
The voltage input end of 190.The voltage that photovoltaic cell string ST2 produces flows to this power module 190, photovoltaic electric by diode D2
The voltage that pond string ST3 produces flows to this power module 190 by diode D3.Additionally as optional scheme, this power supply mould
Block 190 can also be by the output voltage of a power optimization device OP_N of configuration corresponding with this photovoltaic module PV_N (namely electric capacity
The voltage V that C1～C3 producesOUTN) be converted into stable voltage and exported.Must limit: in the load of photovoltaic module PV_N configuration
Ripple sending module 130 sends the stage of communication carrier: the power module 190 of photovoltaic module PV_N configuration is only by photovoltaic module PV_N
The voltage that produces of photovoltaic cell string ST1～ST3 at different levels be acquired and be converted into stable voltage and exported, and do not gather
Output voltage V with conversion power optimization device OP_NOUTN, this is because due to switch SWIThis stage carry out high frequency connection and
Turn off switching, extra turbulent noise voltage can be applied to the voltage input end of power module 190.Power module 190 (can use
The existing voltage conversion plan such as linear power supply or Switching Power Supply) burning voltage that produces can be supplied to wave filter 131b, place
Reason device 132, wireless communication module 133 etc. are as running voltage.
Seeing Fig. 3～4, photovoltaic power optimizes system and also includes the data acquisition equipment with carrier detect module 131
275, carrier detect module 131 includes current sensor 131a and wave filter 131b, and data acquisition equipment 275 is for photovoltaic electric
Appointment parameter Parameter (such as voltage, electric current, temperature, power etc.) of pond string ST1～ST3 is acquired, the scheme body of collection
Present: as a example by photovoltaic module PV_N, the processor 132 of its configuration utilizes currently existing scheme to specifying parameter to receive in advance
Collection, the most current a lot of MCU processors are from the sensing module with these parameters, it is also possible to utilize the parameter acquisition mould of auxiliary
Block collects these parameters, and after processor 132 has known these parameter informations, then processor 132 just can be by controlling
The carrier wave sending module 130 of photovoltaic module PV_N configuration is formed on transmission line LAN or sends and characterizes these appointment parameters
Communication carrier data, data acquisition equipment 275 then utilize with carrier detect module 130 on this transmission line LAN
Detecting and extraction illustrate the communication carrier specifying parameter, thus collect these appointment ginsengs of each battery strings in photovoltaic module
Number information.
Seeing the embodiment of Fig. 8, slightly distinguish with each embodiment of Fig. 3～7, each photovoltaic module PV_1～PV_N is equal
It is configured with receipts data or sends out data or the wireless communication module 133 of transceiving data, it is also possible to being configured with carrier wave sending module simultaneously
130, then by realizing the mutual of data, Wireless Telecom Equipment 273 between Wireless Telecom Equipment 273 and wireless communication module 133
Can be integrated in inverter 170 can also be a terminal unit.Now data completely can be with wireless form transmission, institute
Can select or do not select with carrier wave sending module 130 and carrier detect module 131.
In this application, the data sayed etc. can be user instruction, order or other arbitrary data information.
Above, by explanation and accompanying drawing, the exemplary embodiments of the ad hoc structure of detailed description of the invention, foregoing invention are given
Propose existing preferred embodiment, but these contents are not intended as limitation.For a person skilled in the art, in reading
State bright after, various changes and modifications will be apparent to undoubtedly.Therefore, appending claims should be regarded as and contains the present invention
True intention and whole variations and modifications of scope.In Claims scope, the scope of any and all equivalence is with interior
Hold, be all considered as still belonging to the intent and scope of the invention.
Claims (20)
1. photovoltaic power optimizes a system, has multiple photovoltaic modulies of series connection, it is characterised in that:
Described photovoltaic module is configured with carrier wave sending module and/or wireless communication module to realize the transmission of data, described carrier wave
Sending module is for forming communication carrier on the transmission line concatenated photovoltaic module；
Described photovoltaic module is configured with carrier detect module and/or wireless communication module to realize the reception of data, described carrier wave
Detecting module is at least for extracting communication carrier on this transmission line；
At least some of described photovoltaic module receives by the wireless communication module of configuration or sends and is presented as wireless forms of communication
The first data；And/or
Described photovoltaic module receives by the carrier detect module of configuration and is presented as communication carrier form on described transmission line
The second data.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that described carrier wave sending module at least includes
The first switch and the capacitor being serially connected；
Send the stage of communication carrier at described carrier wave sending module, first switchs the processor control configured by described photovoltaic module
Make and switching off and on switching between state, in order to formed on transmission line and carry data carrier electric current.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that described carrier detect module includes electric current
Detector unit and wave filter, this current detecting unit is for monitoring the current information on described transmission line, and this wave filter is used for
The default communication carrier signal with designated frequency range is extracted from described current information.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that the first kind in the middle of described photovoltaic module
Assembly is configured with its central Equations of The Second Kind assembly of wireless communication module and is then configured without wireless communication module；And
The processor of first kind assembly configuration is when receiving the first data of wireless communication module transmission, and its processor is by controlling
The described carrier wave sending module of first kind assembly configuration forms the second data characterizing the first data on transmission line；And
The described carrier detect module of Equations of The Second Kind assembly configuration is extracted these second data and is transferred to the processor of Equations of The Second Kind assembly.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that first in described photovoltaic module and the
Two class components are provided with wireless communication module, in the case of the wireless communication module of Equations of The Second Kind assembly is by signal shielding:
The processor of first kind assembly configuration is when receiving the first data of wireless communication module transmission, and its processor is by controlling
The described carrier wave sending module of first kind assembly configuration forms the second data characterizing the first data on transmission line；And
The described carrier detect module of Equations of The Second Kind assembly configuration is extracted these second data and is transferred to the processor of Equations of The Second Kind assembly.
Photovoltaic power the most according to claim 2 optimizes system, it is characterised in that described carrier wave sending module includes mutually
First switch and capacitor and the first resistor of series connection, described carrier wave sending module also includes being connected in parallel on the one of capacitor two ends
Individual second resistor.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that also include for the multistage institute by series connection
State the inverter of converting direct-current power into alternating-current power of photovoltaic module output, the first wherein said data by inverter integrated one
Individual Wireless Telecom Equipment sends.
Photovoltaic power the most according to claim 1 optimizes system, it is characterised in that the first wherein said data are by one
Wireless Telecom Equipment is sent, and this Wireless Telecom Equipment is that an independent terminal matching used with described photovoltaic module sets
Standby.
Photovoltaic power the most according to claim 1 optimize system, it is characterised in that each photovoltaic module all include one-level or
Multistage photovoltaic cell string, each photovoltaic module is also configured with a power optimization device, and each power optimization device includes multistage electricity
Voltage conversion circuit, every voltage order one change-over circuit all carry out the voltage that corresponding one-level photovoltaic cell string produces boosting or
Blood pressure lowering conversion output；
Wherein, the described respective output voltage of power optimization device of each self-configuring of described photovoltaic module of multiple concatenations is superimposed upon one
Rise, as total output voltage of multiple described photovoltaic modulies.
Photovoltaic power the most according to claim 9 optimizes system, it is characterised in that in each power optimization device, appoints
The voltage that corresponding one-level photovoltaic cell string produces all is carried out voltage conversion and exports by a voltage conversion circuit of anticipating
In one output capacitance, and voltage conversion circuits at different levels respective output capacitance series connection in each power optimization device, and often
The output capacitance that one described carrier wave sending module of individual photovoltaic module configuration concatenates with these is in parallel.
11. photovoltaic powers according to claim 9 optimize system, it is characterised in that in each power optimization device: appoint
The voltage that corresponding one-level photovoltaic cell string produces all is carried out boosting by a voltage conversion circuit of anticipating or blood pressure lowering conversion is defeated
Go out in an output capacitance, and the respective output capacitance of multilevel voltage change-over circuit in each power optimization device is gone here and there
It is linked togather, thus in the output capacitance connected by these, voltage of institute's superposition is to provide the output electricity of each power optimization device
Pressure.
12. photovoltaic powers according to claim 9 optimize system, it is characterised in that described voltage conversion circuit is blood pressure lowering
The Buck circuit of type, each voltage conversion circuit all individually carries out maximum power point tracking calculation to a photovoltaic cell string, from
And often corresponding one-level photovoltaic cell string is all realized the output of peak power by voltage order one change-over circuit.
13. photovoltaic powers according to claim 11 optimize system, it is characterised in that configured at each photovoltaic module
One power optimization device also includes:
It is arranged on the second switch in its any one-level or multilevel voltage change-over circuit, changes at the voltage with second switch
In circuit: its output capacitance and second switch are serially connected between one group of outfan of this voltage order one change-over circuit.
14. photovoltaic powers according to claim 13 optimize system, it is characterised in that configure at each photovoltaic module
The stage of described carrier wave sending module transmission communication carrier: the processor control that described second switch is configured by this photovoltaic module
System switches to off state, with the voltage conversion circuits at different levels in a power optimization device will matching with this photovoltaic module each
Output capacitance constitute concatenation branch road give open circuit；
Until after the stage of described carrier wave sending module transmission communication carrier terminates, described second switch is just by described processor
Control to switch to on-state.
15. photovoltaic powers according to claim 9 optimize system, it is characterised in that each photovoltaic module is also configured with one
The power module of individual offer burning voltage, the voltage that the photovoltaic cell strings at different levels of this photovoltaic module are produced by this power module respectively
Being converted into stable voltage to be exported, the voltage that photovoltaic cell strings the most at different levels produce flows to this electricity by diode respectively
Source module；
And/or the output voltage of a power optimization device of configuration corresponding with this photovoltaic module is converted into stable by this power module
Voltage exported.
16. photovoltaic powers according to claim 15 optimize system, it is characterised in that configure at each photovoltaic module
The stage of described carrier wave sending module transmission communication carrier:
The voltage that the photovoltaic cell strings at different levels of this photovoltaic module produce only is entered by the power module limiting the configuration of each photovoltaic module
Row gathers and is converted into stable voltage and exported, and does not gather the output voltage of power optimization device.
17. photovoltaic powers according to claim 1 optimize system, it is characterised in that also include for multistage by connect
The inverter of the converting direct-current power into alternating-current power of described photovoltaic module output, described inverter includes a carrier detect mould
Block；And
The processor of at least one described photovoltaic module configuration transmits at the wireless communication module receiving the configuration of this photovoltaic module
During the first data, its processor is by controlling described carrier wave sending module formation table on transmission line of this photovoltaic module configuration
The second data of the first data are levied；And
The described carrier detect module of described inverter configuration is extracted these second data and is transferred to the processor of inverter.
18. photovoltaic powers according to claim 1 optimize system, it is characterised in that also include one with carrier detect
The data acquisition equipment of module, for being acquired the appointment parameter of battery in described photovoltaic module；
The processor of described photovoltaic module configuration is by controlling the described carrier wave sending module of described photovoltaic module configuration in transmission
The communication carrier data characterizing described appointment parameter are formed on circuit；
Described data acquisition equipment utilize with carrier detect module extracts on this transmission line illustrate described specify join
The communication carrier of number, thus collect the described appointment parameter information of battery in described photovoltaic module.
19. 1 kinds of photovoltaic powers optimize system, have multiple photovoltaic modulies of series connection, it is characterised in that:
Each photovoltaic module all includes that one or more levels photovoltaic cell string, each photovoltaic module are also configured with a power optimization
Device, each power optimization device includes one or more levels voltage conversion circuit, and every voltage order one change-over circuit is all by corresponding
The voltage that produces of one-level photovoltaic cell string carry out boosting or blood pressure lowering conversion output；
The described respective output voltage of power optimization device of multiple each self-configurings of described photovoltaic module is superimposed, as multiple
Total output voltage of described photovoltaic module；
Described photovoltaic module is configured with carrier wave sending module and/or wireless communication module to realize the transmission of data, described carrier wave
Sending module is for forming communication carrier on the transmission line concatenated photovoltaic module；And
Described photovoltaic module is configured with carrier detect module and/or wireless communication module to realize the reception of data, described carrier wave
Detecting module is at least for extracting communication carrier on this transmission line.
20. photovoltaic powers according to claim 19 optimize system, it is characterised in that holding in described power optimization device
Each voltage conversion circuit of row maximum power point tracking all includes:
It is connected respectively to the corresponding positive terminal of one-level photovoltaic cell string, the first input end of negative pole end, the second input,
And the first and second output nodes of offer output voltage, the output capacitance of the most each voltage conversion circuit is connected to its
Between first and second output nodes, one first switching switch and an inductance connection are at first input end and the first output joint
Between point, the second input and the second output node are coupled, and one second switching switch or fly-wheel diode are even
It is connected between an interconnecting nodes and the second output node between the first switching switch and inductance；Or
It is connected respectively to the corresponding positive terminal of one-level photovoltaic cell string, the first input end of negative pole end, the second input,
And the first and second output nodes of offer output voltage, the output capacitance of the most each voltage conversion circuit is connected to its
Between first and second output nodes, one first switching switch and an inductance connection are at the second input and the second output joint
Between point, first input end and the first output node are coupled, and one second switching switch or fly-wheel diode are even
It is connected between an interconnecting nodes and the first output node between the first switching switch and inductance；
Wherein, the second switch in any one-level also including in power optimization device being arranged on it or multilevel voltage change-over circuit,
In any one voltage conversion circuit with second switch: its output capacitance and second switch are serially connected in this voltage order one
Between first, second output node of change-over circuit.
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