CN205792438U - A kind of photovoltaic module string power optimized system - Google Patents
A kind of photovoltaic module string power optimized system Download PDFInfo
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- CN205792438U CN205792438U CN201620673062.3U CN201620673062U CN205792438U CN 205792438 U CN205792438 U CN 205792438U CN 201620673062 U CN201620673062 U CN 201620673062U CN 205792438 U CN205792438 U CN 205792438U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a kind of photovoltaic module string power optimized system in photovoltaic system field, including control system and main circuit, main circuit is made up of the optimization component organizing structure identical more, optimization component includes that main power model, the input of main power model are connected between inverter inlet highway and ground；The outfan of main power model is connected with the input from power model；Managing photovoltaic module from power model, each outfan from power model is connected between the positive output end of photovoltaic module and inverter bus；Control system controls main power model output low-voltage dc voltage, keeps output balance；Control system controls to adjust its output voltage values from power model in real time according to inverter DC bus-bar voltage and the photovoltaic module maximum power point voltage calculated, keep the maximum power point (mpp) that each photovoltaic string is under system restriction and environmental constraints, this utility model improves the capacity usage ratio of photovoltaic string, can be used in photovoltaic control.
Description
Technical field
This utility model relates to a kind of photovoltaic control system, optimizes system particularly to a kind of photovoltaic string.
Background technology
In photovoltaic generation is applied, there is the power mismatch phenomenon of many levels, first photovoltaic battery panel itself exist certain
Tolerance, cause the steady-state operation point of every piece of photovoltaic panel Maximum Power Output to have difference；When multiple photovoltaic cells connection bunchiness is defeated
Go out when powering to photovoltaic DC-to-AC converter, due to information summary effects such as parameter coupling, uneven illumination, shade cover, cause power to lose
Joining phenomenon more serious, the utilization rate of photovoltaic declines further.
Utility model content
The purpose of this utility model is to provide a kind of photovoltaic module string power optimized system, eliminates mismatch phenomenon, improves too
The utilization rate of sun energy.
The purpose of this utility model is achieved in that a kind of photovoltaic module string power optimized system, including control system
And main circuit, described main circuit is made up of the optimization component organizing structure identical more, and described optimization component includes:
Main power model, in order to input the energy of coupling photovoltaic module to from power model, balances and exports from power model
Energy；
From power model, the voltage x current sent according to photovoltaic module controls the output voltage of himself, to keep photovoltaic
Assembly sends current maximum steady state power；
Photovoltaic module, is in series by multiple photovoltaic panel, forms photovoltaic string；
The input of main power model is connected between inverter inlet highway and ground；The outfan of main power model with from merit
The input of rate module is connected；Managing photovoltaic module from power model, each outfan from power model is connected to photovoltaic group
Between positive output end and the inverter bus of part；
Described control system controls main power model output low-voltage dc voltage, keeps output balance；Described control
System controls from power model real-time according to inverter DC bus-bar voltage and the photovoltaic module maximum power point voltage calculated
Adjust its output voltage values, keep the maximum power point (mpp) that each photovoltaic string is under system restriction and environmental constraints.
As further restriction of the present utility model, described main power model is the conversion of isolation type bidirectional DC-to-DC
Device, inputs as inverter DC bus-bar voltage, is output as low-voltage DC；Its main circuit includes the first power IGBT switching tube
Q1, the second power IGBT switching tube Q2, the 3rd power IGBT switching tube Q3, the 4th power IGBT switching tube Q4, power transformer
T, the 5th power MOS pipe Q5, the 6th power MOS pipe Q6, the 7th power MOS pipe Q7, the 8th power MOS pipe Q8 and the first bus
Electric capacity C1；The colelctor electrode of the first power IGBT switching tube Q1, the colelctor electrode of the 3rd power IGBT switching tube Q3 input with inverter
Bus is connected, and the source electrode of the first power IGBT switching tube and the colelctor electrode of the second power IGBT switching tube Q2 are connected, the 3rd power
The source electrode of IGBT switching tube Q3 and the colelctor electrode of the 4th power IGBT switching tube Q4 are connected, the source of the second power IGBT switching tube Q2
Pole, the source ground of the 4th power IGBT switching tube Q4, the former limit of power transformer T one terminates the first power IGBT pipe Q1 and second
Electrode points A between power IGBT pipe Q2, the electricity between another termination the 3rd power IGBT pipe Q3 and the 4th power IGBT pipe Q4
Limit B, one end of power transformer T secondary is connected with electrode points C, and the other end is connected with electrode points D, and electrode points C is positioned at
5th power MOS pipe Q5 source electrode and the 6th power MOS pipe Q6 drain electrode between, electrode points D be positioned at the 7th power MOS pipe Q7 source electrode with
8th power MOS pipe Q8 drain electrode between, the drain electrode of the 5th power MOS switch tube Q5, the 7th power MOS switch tube Q7 drain electrode with
Output bus positive pole BUSP is connected, the source electrode of the 5th power MOS switch tube Q5 and the drain electrode phase of the 6th power MOS switch tube Q6
Even, the source electrode of the 7th power MOS switch tube Q7 and the drain electrode of the 8th power MOS switch tube Q8 are connected, the 6th power MOS switch tube
The source electrode of Q6, the source electrode of the 8th power MOS switch tube Q8 are connected with output bus negative pole BUSN, and the first bus capacitor C1 is connected across
Output bus positive pole BUSP and output bus negative pole BUSN two ends.
As further restriction of the present utility model, the described main circuit from power model include the first inductance LM1, the 9th
Power MOS pipe Q9, the second inductance LM2, the 3rd electric capacity C3, the tenth power MOS pipe Q10, the second electric capacity C2；9th power MOS pipe
The drain electrode of Q9 connects bus positive pole BUSP, the source electrode of the 9th power MOS pipe Q9 and one end of the 3rd electric capacity C3 and is connected, the 3rd electric capacity
The other end of C3 and the drain electrode of the tenth power MOS pipe Q10 are connected, and the source electrode of the second power MOS pipe connects bus negative pole BUSN phase
Connect, the termination other end of bus positive pole BUSP, the first inductance LM1 of the first inductance LM1 and the tenth power MOS pipe Q10's
Drain electrode is connected, and one end of the second inductance LM2 is connected with the source electrode of the 9th power MOS pipe Q9, the other end of the second inductance LM2
Connecing inverter inlet highway, bus negative pole BUSN is connected with the outfan of photovoltaic module, a termination inverter of the second electric capacity C2
Inlet highway, another termination bus negative pole BUSN of the second electric capacity C2.
Compared with prior art, the beneficial effects of the utility model are: utilize RF power converter technique by one just
Negative continuous controllable voltage source is inserted in photovoltaic module so that often the photovoltaic module of group parallel connection generating can work in maximum output
Power points；Controllable voltage source voltage owing to inserting is low, so the electrical power of the process of principal and subordinate's power model is the lowest, i.e. practical new
The optimization system proposed in type is the least relative to the loss of existing scheme.This utility model can be used in photovoltaic generation.
Accompanying drawing explanation
Fig. 1 is this utility model system structure schematic diagram.
Fig. 2 is main power module circuit figure in this utility model.
Fig. 3 is from power module circuit figure in this utility model.
Fig. 4 is main power model control principle drawing in this utility model.
Fig. 5 is from power model control principle drawing in this utility model.
Detailed description of the invention
A kind of photovoltaic module string power optimized system as Figure 1-3, including control system and main circuit, described main electricity
The optimization component composition that route many groups structure is identical, described optimization component includes:
Main power model PM, in order to input the energy of coupling photovoltaic module to from power model SM, balance is from power model
The energy of SM output, described main power model PM is isolation type bidirectional DC-to-DC converter, inputs as inverter direct current female
Line voltage, is output as low-voltage DC；Its main circuit includes the first power IGBT switching tube Q1, the second power IGBT switching tube
Q2, the 3rd power IGBT switching tube Q3, the 4th power IGBT switching tube Q4, power transformer T, the 5th power MOS pipe Q5, the 6th
Power MOS pipe Q6, the 7th power MOS pipe Q7, the 8th power MOS pipe Q8 and the first bus capacitor C1；First power IGBT opens
Close the colelctor electrode of pipe Q1, the colelctor electrode of the 3rd power IGBT switching tube Q3 is connected with inverter inlet highway, the first power IGBT
The source electrode of switching tube and the colelctor electrode of the second power IGBT switching tube Q2 are connected, the source electrode of the 3rd power IGBT switching tube Q3 and the
The colelctor electrode of four power IGBT switching tube Q4 is connected, the source electrode of the second power IGBT switching tube Q2, the 4th power IGBT switching tube
The source ground of Q4, the former limit of power transformer T one terminates the electricity between the first power IGBT pipe Q1 and the second power IGBT pipe Q2
Limit A, electrode points B between another termination the 3rd power IGBT pipe Q3 and the 4th power IGBT pipe Q4, power transformer T secondary
One end be connected with electrode points C, the other end is connected with electrode points D, electrode points C be positioned at the 5th power MOS pipe Q5 source electrode with
Between 6th power MOS pipe Q6 drain electrode, electrode points D is positioned at the 7th power MOS pipe Q7 source electrode and the 8th power MOS pipe Q8 drains it
Between, the drain electrode of the 5th power MOS switch tube Q5, the drain electrode of the 7th power MOS switch tube Q7 are connected with output bus positive pole BUSP,
The source electrode of the 5th power MOS switch tube Q5 and the drain electrode of the 6th power MOS switch tube Q6 are connected, the 7th power MOS switch tube Q7
Source electrode and the 8th power MOS switch tube Q8 drain electrode be connected, the source electrode of the 6th power MOS switch tube Q6, the 8th power MOS open
The source electrode closing pipe Q8 is connected with output bus negative pole BUSN, and the first bus capacitor C1 is connected across output bus positive pole BUSP and output
Bus negative pole BUSN two ends；
From power model SM, the voltage x current sent according to photovoltaic module controls the output voltage of himself, to keep light
Photovoltaic assembly sends current maximum steady state power, and the described main circuit from power model SM includes the first inductance LM1, the 9th power
Metal-oxide-semiconductor Q9, the second inductance LM2, the 3rd electric capacity C3, the tenth power MOS pipe Q10, the second electric capacity C2；9th power MOS pipe Q9's
Drain electrode connects bus positive pole BUSP, the source electrode of the 9th power MOS pipe Q9 and one end of the 3rd electric capacity C3 and is connected, the 3rd electric capacity C3's
The drain electrode of the other end and the tenth power MOS pipe Q10 is connected, and the source electrode of the second power MOS pipe meets bus negative pole BUSN and is connected,
The one termination bus positive pole BUSP of the first inductance LM1, the other end of the first inductance LM1 and the drain electrode phase of the tenth power MOS pipe Q10
Connecting, one end of the second inductance LM2 is connected with the source electrode of the 9th power MOS pipe Q9, another termination inversion of the second inductance LM2
Device inlet highway, bus negative pole BUSN is connected with the outfan of photovoltaic module, a termination inverter input mother of the second electric capacity C2
Line, another termination bus negative pole BUSN of the second electric capacity C2；
Photovoltaic module, is in series by multiple photovoltaic panel, forms photovoltaic string PV；
The input of main power model PM is connected between inverter inlet highway P and ground GND；The output of main power model PM
End is connected with the input from power model SM；Main power model PM outfan bus the most extremely BUSP, bus negative pole are BUSN,
Managing photovoltaic module from power model SM, each outfan from power model SM is connected to the positive output end of photovoltaic module and inverse
Becoming between device bus, meet inverter inlet highway P from one end StringP of power model SM outfan, other end StringN connects
Photovoltaic string PV output but；
Described control system controls main power model PM and exports low-voltage dc voltage, keeps output balance；Described control
System processed controls from power model SM according to inverter DC bus-bar voltage and the photovoltaic module maximum power point voltage calculated
Adjust its output voltage values in real time, keep each photovoltaic string PV to be in the maximum power output under system restriction and environmental constraints
Point.
In this utility model, control system mainly realizes two functions during controlling, 1) main power model PM is controlled defeated
Go out to hold the energy balance between BUSPi and BUSNi；2) control from power model according to the voltage x current that often string photovoltaic cell sends
The output voltage of SM, keeps often string photovoltaic cell to send current maximum steady state power；Above-mentioned two functions are by following controlling party
Method realizes.
During utility model works, as illustrated in figures 4-5, to main power model PM and control from power model SM respectively
System；Described main power model PM control method is: before controlling, regulation the first power IGBT switching tube Q1 and the 4th power IGBT opens
Close the same logic of pipe Q4, the first power IGBT switching tube Q1 and the second power IGBT switching tube Q2 logical complement, the 3rd power IGBT
Switching tube Q3 and the 4th power IGBT switching tube Q4 logical complement, the 5th power MOS pipe Q5 and the 8th power MOS pipe Q8 is with patrolling
Volume, the 5th power MOS pipe Q5 and the 6th power MOS pipe Q6 logical complement, the 7th power MOS pipe Q7 and the 8th power MOS pipe Q8
Logical complement, directly there is phase contrast phase in the first power IGBT switching tube Q1 and the 5th power MOS pipe Q5；During control, will be main
Module output voltagev BUSAfter sampling and setting valueV * BUSCompare, carry out closed loop control, by coupling photovoltaic string PV energy extract out or
Sending inverter dc bus back to, closed loop control process middle controller output violent change is between [-90,90]；
The described control method from power model SM is: regulate the 9th power MOS pipe Q9 and the tenth power MOS pipe before Kong Zhiing
Q10 logical complement, during control, measures the voltage and current of photovoltaic string PV, calculates according to conventional maximum power point tracking algorithm
The steady state voltage point that this photovoltaic string PV should run, further according to real-time inverter busbar voltage VP-GNDCalculate the voltage of insertion, pass through
Closed loop control utilizes voltage controller to calculate dutycycle d of the 9th power MOS pipe Q9, thus controls from power model SM output electricity
Pressure, i.e. voltage between StringP and StringN.After this voltage inserts between photovoltaic module and inverter dc bus, from
So terminal voltage of forcibly changing photovoltaic module, can adjust the operating point of photovoltaic module to optimal working point, export current environment
Under maximum electric power.
This utility model is not limited to above-described embodiment, on the basis of technical scheme disclosed in this utility model, this
The technical staff in field is according to disclosed technology contents, it is not necessary to performing creative labour just can be special to some of which technology
Levying and make some replacements and deformation, these are replaced and deformation is all in protection domain of the present utility model.
Claims (3)
1. a photovoltaic module string power optimized system, it is characterised in that include control system and main circuit, described main circuit by
The optimization component composition that many group structures are identical, described optimization component includes:
Main power model, it is provided that or absorbed power, in order to mate the peak power output of photovoltaic module；
From power model, the voltage x current sent according to photovoltaic module controls the output voltage of himself, to keep photovoltaic module
Send current maximum steady state power；
Photovoltaic module, is in series by multiple photovoltaic panel, forms photovoltaic string；
The input of main power model is connected between inverter inlet highway and ground；The outfan of main power model with from power mould
The input of block is connected；Managing photovoltaic module from power model, each outfan from power model is connected to photovoltaic module
Between positive output end and inverter bus；
Described control system controls main power model output low-voltage dc voltage, keeps output balance；Described control system
Control to adjust in real time according to inverter DC bus-bar voltage and the photovoltaic module maximum power point voltage calculated from power model
Its output voltage values, keeps the maximum power point (mpp) that each photovoltaic string is under system restriction and environmental constraints.
A kind of photovoltaic module string power optimized system the most according to claim 1, it is characterised in that described main power model
For isolation type bidirectional DC-to-DC converter, input as inverter DC bus-bar voltage, be output as low-voltage DC；Its main electricity
Road includes the first power IGBT switching tube Q1, the second power IGBT switching tube Q2, the 3rd power IGBT switching tube Q3, the 4th power
IGBT switching tube Q4, power transformer T, the 5th power MOS pipe Q5, the 6th power MOS pipe Q6, the 7th power MOS pipe Q7, the 8th
Power MOS pipe Q8 and the first bus capacitor C1；The colelctor electrode of the first power IGBT switching tube Q1, the 3rd power IGBT switching tube
The colelctor electrode of Q3 is connected with inverter inlet highway, the source electrode of the first power IGBT switching tube and the second power IGBT switching tube Q2
Colelctor electrode be connected, the source electrode of the 3rd power IGBT switching tube Q3 and the colelctor electrode of the 4th power IGBT switching tube Q4 are connected, the
The source electrode of two power IGBT switching tube Q2, the source ground of the 4th power IGBT switching tube Q4, the former limit of power transformer T one terminates
Electrode points A between first power IGBT pipe Q1 and the second power IGBT pipe Q2, another termination the 3rd power IGBT pipe Q3 and the
Electrode points B between four power IGBT pipe Q4, one end of power transformer T secondary is connected with electrode points C, the other end and electrode
Point D is connected, and electrode points C is between the 5th power MOS pipe Q5 source electrode and the 6th power MOS pipe Q6 drain, and electrode points D is positioned at
Between 7th power MOS pipe Q7 source electrode and the 8th power MOS pipe Q8 drain electrode, the drain electrode of the 5th power MOS switch tube Q5, the 7th merit
The drain electrode of rate MOS switch pipe Q7 is connected with output bus positive pole BUSP, the source electrode of the 5th power MOS switch tube Q5 and the 6th power
The drain electrode of MOS switch pipe Q6 is connected, the source electrode of the 7th power MOS switch tube Q7 and the drain electrode phase of the 8th power MOS switch tube Q8
Even, the source electrode of the 6th power MOS switch tube Q6, the source electrode of the 8th power MOS switch tube Q8 are connected with output bus negative pole BUSN,
First bus capacitor C1 is connected across output bus positive pole BUSP and output bus negative pole BUSN two ends.
A kind of photovoltaic module string power optimized system the most according to claim 1 and 2, it is characterised in that described from power
The main circuit of module includes the first inductance LM1, the 9th power MOS pipe Q9, the second inductance LM2, the 3rd electric capacity C3, the tenth power
Metal-oxide-semiconductor Q10, the second electric capacity C2；The drain electrode of the 9th power MOS pipe Q9 connects bus positive pole BUSP, the source electrode of the 9th power MOS pipe Q9
Being connected with one end of the 3rd electric capacity C3, the other end of the 3rd electric capacity C3 and the drain electrode of the tenth power MOS pipe Q10 are connected, the
The source electrode of two power MOS pipes meets bus negative pole BUSN and is connected, a termination bus positive pole BUSP of the first inductance LM1, the first electricity
The other end of sense LM1 and the drain electrode of the tenth power MOS pipe Q10 are connected, one end of the second inductance LM2 and the 9th power MOS pipe
The source electrode of Q9 is connected, and another termination inverter inlet highway of the second inductance LM2, bus negative pole BUSN is defeated with photovoltaic module
Go out end to be connected, a termination inverter inlet highway of the second electric capacity C2, another termination bus negative pole BUSN of the second electric capacity C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673062.3U CN205792438U (en) | 2016-06-30 | 2016-06-30 | A kind of photovoltaic module string power optimized system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673062.3U CN205792438U (en) | 2016-06-30 | 2016-06-30 | A kind of photovoltaic module string power optimized system |
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| CN205792438U true CN205792438U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620673062.3U Withdrawn - After Issue CN205792438U (en) | 2016-06-30 | 2016-06-30 | A kind of photovoltaic module string power optimized system |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026903A (en) * | 2016-06-30 | 2016-10-12 | 扬州华鼎电器有限公司 | Power optimization system and optimization method for photovoltaic assembly string |
| CN110768359A (en) * | 2019-11-22 | 2020-02-07 | 中国联合网络通信集团有限公司 | Voltage control method and photovoltaic power supply device and system |
-
2016
- 2016-06-30 CN CN201620673062.3U patent/CN205792438U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026903A (en) * | 2016-06-30 | 2016-10-12 | 扬州华鼎电器有限公司 | Power optimization system and optimization method for photovoltaic assembly string |
| CN106026903B (en) * | 2016-06-30 | 2017-12-01 | 扬州华鼎电器有限公司 | A kind of photovoltaic module string power optimized system and its optimization method |
| CN110768359A (en) * | 2019-11-22 | 2020-02-07 | 中国联合网络通信集团有限公司 | Voltage control method and photovoltaic power supply device and system |
| CN110768359B (en) * | 2019-11-22 | 2021-11-19 | 中国联合网络通信集团有限公司 | Voltage control method and photovoltaic power supply device and system |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20171201 |
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| AV01 | Patent right actively abandoned |