CN104467392B - Prevent method, device and the photovoltaic system of five-electrical level inverter bus overvoltage - Google Patents
Prevent method, device and the photovoltaic system of five-electrical level inverter bus overvoltage Download PDFInfo
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- CN104467392B CN104467392B CN201410799352.8A CN201410799352A CN104467392B CN 104467392 B CN104467392 B CN 104467392B CN 201410799352 A CN201410799352 A CN 201410799352A CN 104467392 B CN104467392 B CN 104467392B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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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
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Abstract
This application discloses a kind of method preventing five-electrical level inverter bus overvoltage, device and photovoltaic system, wherein the method includes：Obtain the busbar voltage of five-electrical level inverter；Judge described busbar voltage whether higher than the maximum permissible voltage on bus；When described busbar voltage is higher than described maximum permissible voltage; the prime Boost circuit controlling described five-electrical level inverter is shut down; turn off the switching tube connecting photovoltaic array and net side in described five-electrical level inverter; and control described five-electrical level inverter to be operated in three level active patterns; until the busbar voltage of described five-electrical level inverter is not higher than described maximum permissible voltage, to prevent five-electrical level inverter busbar voltage too high.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more particularly, it relates to one kind prevents five-electrical level inverter bus mistake
The method of voltage, device and photovoltaic system.
Background technology
The direct current side joint photovoltaic array 20 of five-electrical level inverter 10 shown in Fig. 1, in order to receive PV input voltage, described PV is defeated
Enter the negative pole of the positive pole in electric capacity C1 for the voltage jump and electric capacity C2, the voltage at C1, C2 opposing busbars midpoint be respectively V1Pos and-
V1Neg；It is connected across bus after the two-way Boost circuit boosting also through five-electrical level inverter 10 prime for the described PV input voltage simultaneously
The positive pole of electric capacity C3 and the negative pole of bus capacitor C4, the voltage at C3, C4 opposing busbars midpoint is respectively V2Pos and-V2Neg.Five
The net side filtered device 30 of output of electrical level inverter 10 filters, transformator 40 sends into electrical network after boosting, and opens in different switching tubes
Under logical combinations of states, five-electrical level inverter 10 replaces in output+V1Pos ,-V1Neg ,+V2Pos ,-V2Neg level and bus
The corresponding zero level of point.
But, when leading to PV input energy cannot reach electrical network in time because of electric network fault, the energy of accumulation can be by mother
Line capacitance C3 and bus capacitor C4 stores, and causes the busbar voltage of five-electrical level inverter 10 too high, in turn results in inverter
Disorderly closedown or even module overvoltage demolition.
Content of the invention
In view of this, the present invention provides a kind of method preventing five-electrical level inverter bus overvoltage, device and photovoltaic system
System, to prevent five-electrical level inverter busbar voltage too high.
A kind of method preventing five-electrical level inverter bus overvoltage, including：
Obtain the busbar voltage of five-electrical level inverter；
Judge described busbar voltage whether higher than the maximum permissible voltage on bus；
When described busbar voltage is higher than described maximum permissible voltage, control prime Boost of described five-electrical level inverter
Circuit is shut down, and turns off the switching tube connecting photovoltaic array and net side in described five-electrical level inverter, and controls described five level inverse
Become device and be operated in three level active patterns, until the busbar voltage of described five-electrical level inverter is not higher than described maximum allowable electricity
Pressure.
Alternatively, when the busbar voltage of described five-electrical level inverter is not higher than described maximum permissible voltage, methods described
Also include：
Control described prime Boost circuit to start, connect the described switching tube connecting photovoltaic array and net side, and control institute
State five-electrical level inverter and be operated in five level active patterns.
A kind of device preventing five-electrical level inverter bus overvoltage, including：
Acquiring unit, for obtaining the busbar voltage of five-electrical level inverter；
Whether judging unit, for judging described busbar voltage higher than the maximum permissible voltage on bus；
And first processing units, for when judging that obtaining described busbar voltage is higher than described maximum permissible voltage, controlling
The prime Boost circuit making described five-electrical level inverter is shut down, and turns off and connects photovoltaic array and net in described five-electrical level inverter
The switching tube of side, and control described five-electrical level inverter to be operated in three level active patterns, until described five-electrical level inverter
Busbar voltage is not higher than described maximum permissible voltage.
Alternatively, described device also includes：Second processing unit, for judging to obtain the mother of described five-electrical level inverter
When line voltage is not higher than described maximum permissible voltage, controls described prime Boost circuit to start, connect described connection photovoltaic array
With the switching tube of net side, and described five-electrical level inverter is controlled to be operated in five level active patterns.
A kind of photovoltaic system, including photovoltaic array, two-way Boost circuit, five-electrical level inverter, wave filter and transformator,
Wherein, the photovoltaic array described in direct current side joint of described five-electrical level inverter, indirectly by described two-way Boost circuit and institute simultaneously
State photovoltaic array to be connected, its net side is connected with electrical network with described transformator through described wave filter, in addition：
Described photovoltaic system also includes the control being connected respectively with described two-way Boost circuit and described five-electrical level inverter
Device, for obtaining the busbar voltage of described five-electrical level inverter, judges whether described busbar voltage permits higher than the maximum on bus
Permitted voltage, and when described busbar voltage is higher than described maximum permissible voltage, controls described two-way Boost circuit to shut down, close
The interior switching tube connecting described photovoltaic array and net side of the described five-electrical level inverter that breaks, and control described five-electrical level inverter work
In three level active patterns, until the busbar voltage of described five-electrical level inverter is not higher than described maximum permissible voltage.
Alternatively, the busbar voltage that described controller is additionally operable in described five-electrical level inverter is not higher than described maximum allowable
During voltage, control described prime Boost circuit to start, connect the described switching tube connecting photovoltaic energy input and net side, and control
Make described five-electrical level inverter and be operated in five level active patterns.
Wherein, described wave filter is LCL type wave filter.
Wherein, described wave filter is LC mode filter.
Wherein, described LC mode filter has N number of filter capacitor branch road parallel with one another, wherein 2≤N；
Described LC mode filter also includes：It is connected on the filter of each of M described filter capacitor branch road parallel with one another
Damping resistance on ripple electric capacity, wherein 1≤M≤N-1.
Alternatively, described LC mode filter also includes：It is connected in parallel on the by-pass inductor on each described damping resistance.
It can be seen from above-mentioned technical scheme that, the present invention is higher than on bus five-electrical level inverter busbar voltage is detected
Maximum permissible voltage when, control the prime Boost circuit of described five-electrical level inverter to shut down, close connection breaking photovoltaic array and net
The switching tube of side, and control described five-electrical level inverter to be operated in three level active patterns.Due to PV input energy now by
It is fully disconnected, thus avoids busbar voltage and continue to raise, the energy being stored on bus capacitor is also gradually transported on electrical network,
So that busbar voltage is gradually lowered, until recovering to normal value.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of photovoltaic system structural representation disclosed in prior art；
Fig. 2 is a kind of method flow diagram preventing five-electrical level inverter bus overvoltage disclosed in the embodiment of the present invention；
Fig. 3 is the method flow diagram that disclosed in the embodiment of the present invention, another prevents five-electrical level inverter bus overvoltage；
Fig. 4 illustrates for a kind of apparatus structure preventing five-electrical level inverter bus overvoltage disclosed in the embodiment of the present invention
Figure；
Fig. 5 is a kind of photovoltaic system structural representation disclosed in the embodiment of the present invention；
Fig. 6 is a kind of LC mode filter structural representation disclosed in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 2, the embodiment of the invention discloses a kind of method preventing five-electrical level inverter bus overvoltage, to prevent
Five-electrical level inverter busbar voltage is too high, including：
Step 201：Obtain the busbar voltage of five-electrical level inverter；
Step 202：Judge described busbar voltage whether higher than the maximum permissible voltage on bus；When described busbar voltage is high
When described maximum permissible voltage, enter step 203, otherwise return to step 201；
Step 203：The prime Boost circuit controlling described five-electrical level inverter is shut down, and turns off described five-electrical level inverter
The interior switching tube connecting photovoltaic array and net side, and control described five-electrical level inverter to be operated in three level active patterns；
Step 204：Obtain and judge whether the busbar voltage of described five-electrical level inverter is not higher than described maximum allowable electricity
During pressure, if so, this secondary control terminates, otherwise return to step 203.
Referring also to Fig. 1, under normal circumstances, five-electrical level inverter 10 is operated in five level active patterns, i.e. five level inverse conversion
Device 10 under different switching tube opening state combinations alternately output+V1Pos ,-V1Neg, 0, five electricity of+V2Pos and-V2Neg
Flat.When connecting net side with switching tube (or switching tube combines) the S1Pos conducting of the positive PV input voltage of photovoltaic array 20, corresponding
Output level+V1Pos；When the switching tube (or switching tube combines) connecting net side and the negative PV input voltage of photovoltaic array 20
During S1Neg conducting, corresponding output level-V1Neg；Lead with switching tube (or the switching tube combines) S0 at bus midpoint when connecting net side
When logical, corresponding output level 0；Lead with switching tube (or the switching tube combines) S2Pos of first via Boost circuit 50 when connecting net side
When logical, corresponding output+V2Pos；As switching tube (or the switching tube combines) S2Neg connecting net side and the second tunnel Boost circuit 60
During conducting, corresponding output-V2Neg.
The busbar voltage of five-electrical level inverter 10 is equal to the voltage sum on bus capacitor C3 and bus capacitor C4, and size is
V2Pos+V2Neg.When electrical network occurs LVRT (Low voltage ride through, low voltage crossing), ZVRT (Zero
Voltage Ride Through, no-voltage is passed through) or HVRT (High Voltage Ride Through, high voltage crossing)
During etc. fault, for avoiding PV input energy to pile up on bus, the present embodiment takes following measure：
Control first via Boost circuit 50 and the second tunnel Boost circuit 60 to shut down, and photovoltaic array 20 and net side will be connected
Switching tube S1Pos, S1Neg turn off, because PV input energy is now disconnected completely, thus avoid busbar voltage continue
Raise；Afterwards control S2Pos, S2Neg, S0 turn in turn, by five-electrical level inverter 10 by five level active pattern switchings be three
Level active pattern, the energy being now stored on bus capacitor C3 and bus capacitor C4 can gradually be transported on electrical network, thus
Busbar voltage is made to be gradually lowered, until recovering to normal value, to improve five-electrical level inverter reliability of operation.
Preferably, referring to Fig. 3, the embodiment of the invention discloses another prevents five-electrical level inverter bus overvoltage
Method, including：
Step 201：Obtain the busbar voltage of five-electrical level inverter；
Step 202：Judge described busbar voltage whether higher than the maximum permissible voltage on five-electrical level inverter bus；If
It is to enter step 203, otherwise return to step 201；
Step 203：The prime Boost circuit controlling described five-electrical level inverter is shut down, and turns off described five-electrical level inverter
The interior switching tube connecting photovoltaic array and net side, and control described five-electrical level inverter to be operated in three level active patterns；
Step 204：Obtain and judge whether the busbar voltage of described five-electrical level inverter is not higher than described maximum allowable electricity
During pressure, if so, enter step 205, otherwise return to step 203；
Step 205：Photovoltaic system is controlled to recover initial operating state, that is,：Control described prime Boost circuit to start, connect
The logical described switching tube connecting photovoltaic array and net side, and control described five-electrical level inverter to be operated in five level active patterns.
Compared to a upper embodiment, the present embodiment can control photovoltaic when busbar voltage is detected and recovering to normal value
System automatically switches to initial operating state, improves the automaticity preventing five-electrical level inverter bus overvoltage scheme,
Effectively reduce person works' intensity.
In addition it should be noted that the method preventing five-electrical level inverter bus overvoltage described herein, also can open up
Exhibition is applied to multi-electrical level inverter field, such as seven electrical level inverters, nine electrical level inverters etc..Its principle is similar to, and is all that disconnection is inverse
Becoming the PV input energy input of device DC side, reduce level active pattern, thus reducing the needs of busbar voltage, realizing many
The bus overvoltage protection of electrical level inverter.
Referring to Fig. 4, the embodiment of the invention also discloses a kind of device preventing five-electrical level inverter bus overvoltage, bag
Include：
Acquiring unit 41, for obtaining the busbar voltage of five-electrical level inverter；
Whether judging unit 42, for judging described busbar voltage higher than the maximum permissible voltage on bus；
And first processing units 43, for judge obtain described busbar voltage be higher than described maximum permissible voltage when,
The prime Boost circuit controlling described five-electrical level inverter is shut down, turn off described five-electrical level inverter in connect photovoltaic array with
The switching tube of net side, and control described five-electrical level inverter to be operated in three level active patterns, until described five-electrical level inverter
Busbar voltage be not higher than described maximum permissible voltage.
Preferably, referring also to Fig. 4, described device also includes：
Second processing unit 44, for judging to obtain the busbar voltage not higher than described maximum of described five-electrical level inverter
When allowing voltage, control described prime Boost circuit to start, connect the described switching tube connecting photovoltaic array and net side, and control
Make described five-electrical level inverter and be operated in five level active patterns.
Referring to Fig. 5, the embodiment of the invention discloses a kind of photovoltaic system, including five-electrical level inverter 10, photovoltaic array 20,
Wave filter 30, transformator 40, two-way Boost circuit 50 and controller 60, wherein：
The direct current side joint photovoltaic array 20 of five-electrical level inverter 10, passes through two-way Boost circuit 50 indirectly and photovoltaic simultaneously
Array 10 is connected, and the filtered device of its net side 30 is connected with electrical network with transformator 40；
Controller 60 is connected with two-way Boost circuit 50 and five-electrical level inverter 10 respectively, for obtaining five level inverse conversions
Whether the busbar voltage of device 10, judge described busbar voltage higher than the maximum permissible voltage on bus, and when described bus electricity
When pressure is higher than described maximum permissible voltage, controls the prime Boost circuit of five-electrical level inverter 10 to shut down, turn off described five level
Connect the switching tube of photovoltaic array 20 and net side in inverter, and control five-electrical level inverter 10 to be operated in three level active moulds
Formula, until the busbar voltage of five-electrical level inverter 10 is not higher than described maximum permissible voltage.
Preferably, the busbar voltage that controller 60 is additionally operable in described five-electrical level inverter is not higher than described maximum allowable
During voltage, control described prime Boost circuit to start, connect the described switching tube connecting photovoltaic energy input and net side, and control
Make described five-electrical level inverter and be operated in five level active patterns.
Wherein, the LC mode filter shown in the preferred Fig. 5 of wave filter 30, including brachium pontis reactor L and filter capacitor C.For
For the five-electrical level inverter 10 of pulse modulation technology, necessarily contain the harmonic wave relevant with carrier wave in its output waveform and divide
Amount, and then cause harmonic pollution it is therefore necessary to the outlet side in five-electrical level inverter 10 sets up wave filter 30 to filter this portion
Subharmonic component.Wherein, filter capacitor C can adopt Y-connection, it would however also be possible to employ triangle connects to constitute described LC type
The filter-capacitor circuit of wave filter, Fig. 5 is only with delta connection as an example.
Preferably, referring to Fig. 6, described LC mode filter has N number of filter capacitor branch road parallel with one another, wherein 2≤
N；Described LC mode filter also includes：It is connected on each of M described filter capacitor branch road parallel with one another filter capacitor
On damping resistance Rd, wherein 1≤M≤N-1.As：In Fig. 5, Fig. 6 will be equivalent to by the filter-capacitor circuit that filter capacitor C is constituted
Two shown filter capacitor branch roads, including by filter capacitor Cf1The the first filter capacitor branch road constituting, and by filter capacitor
Cf2The the second filter capacitor branch road constituting.
Any bar filter capacitor branch road of described LC mode filter can adopt Y-connection, it would however also be possible to employ triangle is even
Connect, wherein there is damping resistance RdFilter capacitor branch road can play damping action to differential mode resonance.The present embodiment passes through will
The filter-capacitor circuit of described LC mode filter is equivalent to multiple filter capacitor branch roads being in parallel, and part only wherein is propped up
Series damping resistor R on roadd, thus reducing reduction filter-capacitor circuit in the impedance of high band, contribute to improving described LC
The filter effect of mode filter.Additionally, work as there is damping resistance RdFilter capacitor branch road when adopting Y-connection, by by star
Shape midpoint is connected with bus capacitor midpoint, can make damping resistance RdDamping action is all played to common mode resonance and differential mode resonance.
Preferably, referring also to Fig. 6, described LC mode filter also includes：It is connected in parallel on each damping resistance RdOn side
Road inductance Ld.By-pass inductor LdThere is by-pass overdamp resistance RdOn low-frequency current effect, to reduce damping resistance Rd's
Loss.
Additionally, wave filter 30 also can adopt LCL filter, do not limit to.
In sum, the present invention is detecting the maximum permissible voltage that five-electrical level inverter busbar voltage is higher than on bus
When, control the prime Boost circuit of described five-electrical level inverter to shut down, close the switching tube of connection breaking photovoltaic array and net side, and
Described five-electrical level inverter is controlled to be operated in three level active patterns.Because PV input energy is now disconnected completely, thus
Avoid busbar voltage to continue to raise, the energy being stored on bus capacitor is also gradually transported on electrical network, so that bus is electric
Pressure is gradually lowered, until recovering to normal value.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it corresponds to the method disclosed in Example, so description is fairly simple, say referring to method part in place of correlation
Bright.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized in the case of the spirit or scope without departing from the embodiment of the present invention in other embodiments.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent scope the widest of features of novelty.
Claims (10)
1. a kind of method preventing five-electrical level inverter bus overvoltage is it is characterised in that include：
Obtain the busbar voltage of five-electrical level inverter；
Judge described busbar voltage whether higher than the maximum permissible voltage on bus；
When described busbar voltage is higher than described maximum permissible voltage, control the prime Boost circuit of described five-electrical level inverter
Shut down, turn off the switching tube connecting photovoltaic array and net side in described five-electrical level inverter, and control described five-electrical level inverter
It is operated in three level active patterns, until the busbar voltage of described five-electrical level inverter is not higher than described maximum permissible voltage.
2. method according to claim 1 is it is characterised in that the busbar voltage working as described five-electrical level inverter is not higher than institute
When stating maximum permissible voltage, also include：
Control described prime Boost circuit to start, connect the described switching tube connecting photovoltaic array and net side, and control described five
Electrical level inverter is operated in five level active patterns.
3. a kind of device preventing five-electrical level inverter bus overvoltage is it is characterised in that include：
Acquiring unit, for obtaining the busbar voltage of five-electrical level inverter；
Whether judging unit, for judging described busbar voltage higher than the maximum permissible voltage on bus；
And first processing units, for when judging that obtaining described busbar voltage is higher than described maximum permissible voltage, controlling institute
The prime Boost circuit stating five-electrical level inverter is shut down, and turns off and connects photovoltaic array and net side in described five-electrical level inverter
Switching tube, and control described five-electrical level inverter to be operated in three level active patterns, until the bus of described five-electrical level inverter
Voltage is not higher than described maximum permissible voltage.
4. device according to claim 3 is it is characterised in that described device also includes：Second processing unit, for sentencing
When the disconnected busbar voltage obtaining described five-electrical level inverter is not higher than described maximum permissible voltage, control described prime Boost electricity
Road starts, and connects the described switching tube connecting photovoltaic array and net side, and controls described five-electrical level inverter to be operated in five level
Mode of operation.
5. a kind of photovoltaic system, including photovoltaic array, two-way Boost circuit, five-electrical level inverter, wave filter and transformator, its
In, the photovoltaic array described in direct current side joint of described five-electrical level inverter, simultaneously indirect and described by described two-way Boost circuit
Photovoltaic array be connected, its net side be connected with electrical network with described transformator through described wave filter it is characterised in that：
Described photovoltaic system also includes the controller being connected respectively with described two-way Boost circuit and described five-electrical level inverter,
For obtaining the busbar voltage of described five-electrical level inverter, judge described busbar voltage whether higher than the maximum allowable electricity on bus
Pressure, and when described busbar voltage is higher than described maximum permissible voltage, controls described two-way Boost circuit to shut down, turn off institute
State the switching tube connecting described photovoltaic array and net side in five-electrical level inverter, and control described five-electrical level inverter to be operated in three
Level active pattern, until the busbar voltage of described five-electrical level inverter is not higher than described maximum permissible voltage.
6. system according to claim 5 is it is characterised in that described controller is additionally operable in described five-electrical level inverter
When busbar voltage is not higher than described maximum permissible voltage, controls described two-way Boost circuit to start, connect described switching tube, and
Described five-electrical level inverter is controlled to be operated in five level active patterns.
7. the system according to claim 5 or 6 is it is characterised in that described wave filter is LCL type wave filter.
8. the system according to claim 5 or 6 is it is characterised in that described wave filter is LC mode filter.
9. system according to claim 8 is it is characterised in that described LC mode filter has N number of filtering parallel with one another
Capacitive branch, wherein 2≤N；
Described LC mode filter also includes：It is connected on each of M described filter capacitor branch road parallel with one another filtered electrical
Damping resistance in appearance, wherein 1≤M≤N-1.
10. system according to claim 9 is it is characterised in that described LC mode filter also includes：It is connected in parallel on each institute
State the by-pass inductor on damping resistance.
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| CN105141158B (en) * | 2015-09-28 | 2018-02-16 | 阳光电源股份有限公司 | A kind of control method of multi-electrical level inverter, apparatus and system |
| CN107465207B (en) * | 2017-08-11 | 2019-08-13 | 阳光电源股份有限公司 | Flying capacitor five-electrical level inverter and its low voltage traversing control method and device |
| CN108900078B (en) * | 2018-08-03 | 2020-07-07 | 阳光电源股份有限公司 | Flying capacitor type three-level converter and control method thereof |
| CN110311581B (en) | 2019-08-06 | 2021-01-08 | 阳光电源股份有限公司 | Inverter circuit control method and device and inverter |
| CN112821744B (en) * | 2021-03-25 | 2022-07-12 | 漳州科华技术有限责任公司 | Control method and system of converter with booster circuit |
| CN113794376B (en) * | 2021-09-29 | 2024-02-09 | 阳光电源股份有限公司 | Symmetrical three-level Boost circuit and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| CN102545257A (en) * | 2012-01-12 | 2012-07-04 | 广东中商国通电子有限公司 | Solar photovoltaic generating single-phase grid-connected inverter and control method thereof |
| CN103312140A (en) * | 2013-06-07 | 2013-09-18 | 南京航空航天大学 | Starting method of multi-branch two-stage three-phase photovoltaic grid-connected inverter |
| CN104038088A (en) * | 2014-06-30 | 2014-09-10 | 阳光电源股份有限公司 | Method and device for controlling photovoltaic inverter circuit |
Family Cites Families (1)
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| CN102545257A (en) * | 2012-01-12 | 2012-07-04 | 广东中商国通电子有限公司 | Solar photovoltaic generating single-phase grid-connected inverter and control method thereof |
| CN103312140A (en) * | 2013-06-07 | 2013-09-18 | 南京航空航天大学 | Starting method of multi-branch two-stage three-phase photovoltaic grid-connected inverter |
| CN104038088A (en) * | 2014-06-30 | 2014-09-10 | 阳光电源股份有限公司 | Method and device for controlling photovoltaic inverter circuit |
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