CN106972772A - A kind of inversion system and its operating voltage control method - Google Patents
A kind of inversion system and its operating voltage control method Download PDFInfo
- Publication number
- CN106972772A CN106972772A CN201710317164.0A CN201710317164A CN106972772A CN 106972772 A CN106972772 A CN 106972772A CN 201710317164 A CN201710317164 A CN 201710317164A CN 106972772 A CN106972772 A CN 106972772A
- Authority
- CN
- China
- Prior art keywords
- power
- source
- predetermined power
- inverter
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of operating voltage control method of inversion system, by the way that the power output of dc source is compared with corresponding predetermined power；When the power output of dc source is more than the peak power that inverter can be exported, such as when more than the first predetermined power, export new MPPT maximum power point tracking instruction, control MPPT maximum power point tracking voltage gradually reduces according to default step-length；And when the power output of dc source is more than the second predetermined power, not only control MPPT maximum power point tracking voltage gradually to be reduced according to default step-length, while controlling the adjusting means conducting of inverter direct-flow side, consume the power output of dc source；Avoid dc source power output be more than inverter can export peak power when, because inverter is operated in high voltage, caused by inverter longevity shorten and system lower power production.
Description
Technical field
The present invention relates to contravarianter voltage control technology field, more particularly to a kind of inversion system and its operating voltage control
Method.
Background technology
In the application field of inverter, there are some factors will cause the power output of dc source to be more than inverter energy
The peak power enough exported；Such as when inverter is in super match somebody with somebody under working condition, i.e. assuming that the rated power of inverter is P, and
The capacity for configuring its dc source (such as photovoltaic battery panel) is N*P so that inverter is under the conditions of certain illumination temperature, and its is defeated
Go out power and will be greater than P.
When the super timing of inverter, and under certain illumination and temperature conditionss, the power output of dc source is more than inverter
During the peak power that can be exported, inverter will can not be operated in the MPP electrical voltage point Umpp of dc source output, and operating point electricity
Pressure can be more than MPP electrical voltage points Umpp；It is super match somebody with somebody it is more, its quiescent potential will be higher.
And inverter is operated in high voltage, it will influence inverter longevity, and high pressure drop volume or even shutdown occurs
Situation so that in some cases reduce system generated energy.
The content of the invention
The present invention provides a kind of inversion system and its operating voltage control method, to solve in the prior art in dc source
Power output when being more than the peak power that inverter can be exported, influence inverter longevity and reduction system generated energy are asked
Topic.
To achieve the above object, the technical scheme that the application is provided is as follows：
A kind of operating voltage control method of inversion system, the controller applied to inversion system；The inversion system
Operating voltage control method includes：
The power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the first predetermined power, new MPPT maximum power point tracking instruction, control are exported
MPPT maximum power point tracking voltage processed is gradually reduced according to default step-length；
If the power output of dc source is more than the second predetermined power, new MPPT maximum power point tracking instruction, control are exported
MPPT maximum power point tracking voltage processed is gradually reduced according to default step-length, and controls to adjust device conducting；The two of the adjusting means
End is connected with the DC side both positive and negative polarity of inverter in inversion system, is arranged between dc source and dc-link capacitance respectively；
Second predetermined power is more than first predetermined power, and first predetermined power can be defeated more than inverter
The peak power gone out.
It is preferred that, after the control and regulation device conducting, in addition to：
If the power output of dc source drops to less than the 3rd predetermined power, the adjusting means is controlled to turn off；
The new MPPT maximum power point tracking instruction of the output, control MPPT maximum power point tracking voltage according to default step-length by
After gradually reducing, in addition to：
If the power output of dc source drops to less than the maximum under the 4th predetermined power, output normal operating conditions
Power points trace command；
3rd predetermined power is less than second predetermined power, and the 4th predetermined power, which is less than described first, to be preset
Power, the 3rd predetermined power is more than the 4th predetermined power, the 3rd predetermined power and the 4th predetermined power
The peak power that can be exported more than or equal to inverter.
It is preferred that, in addition to：
The lower voltage limit of smaller operating voltage and inverter corresponding to the peak power that inverter can be exported is carried out
Compare；
If the smaller operating voltage is less than the lower voltage limit, new MPPT maximum power point tracking instruction, control are exported
MPPT maximum power point tracking voltage is the lower voltage limit, and controls the adjusting means to turn on.
It is preferred that, the control and regulation device conducting, including：
The adjusting means normal open or copped wave is controlled to export.
It is preferred that, the power output by dc source is compared with corresponding predetermined power, including：
First the power output of the dc source is compared with first predetermined power；
If the power output of the dc source is more than first predetermined power, export new maximum power point with
After track instruction, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length, then by the output of the dc source
Power is compared with second predetermined power.
A kind of inversion system, including：Inverter, adjusting means and controller；The two ends of the adjusting means respectively with institute
The DC side both positive and negative polarity for stating inverter is connected, is arranged between dc source and dc-link capacitance；
The controller is used for the operating voltage control method for performing any of the above-described described inversion system.
It is preferred that, the adjusting means includes：Resistance and switching tube；
The resistance is connected in series with the switching tube, and DC side of the two ends after series connection respectively with the inverter is positive and negative
Extremely it is connected；
The control end of the switching tube is connected with the controller.
A kind of operating voltage control method of inversion system, the controller applied to stage type inversion system；The inversion
The operating voltage control method of system includes：
The power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the 5th predetermined power, new MPPT maximum power point tracking instruction, control are exported
MPPT maximum power point tracking voltage processed is gradually reduced according to default step-length；
If the power output of dc source is more than the switching tube in the 6th predetermined power, control prime DC/DC converters
Conducting, declines DC bus-bar voltage；When DC bus-bar voltage drops to predetermined threshold value, the switching tube shut-off is controlled, with
The predetermined threshold value instructs for the MPPT maximum power point tracking of initial order voltage output, until the power output of rear class inverter is it
The peak power that can be exported；
6th predetermined power is more than the 5th predetermined power, and the 5th predetermined power is more than rear class inverter energy
The peak power enough exported.
It is preferred that, the power output by dc source is compared with corresponding predetermined power, including：
First the power output of the dc source is compared with the 5th predetermined power；
If the power output of the dc source is more than the 5th predetermined power, export new maximum power point with
After track instruction, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length, then by the output of the dc source
Power is compared with the 6th predetermined power.
A kind of inversion system, including：Rear class inverter, controller and at least one prime DC/DC converters；
The controller is used for the operating voltage control method for performing above-mentioned inversion system.
The operating voltage control method for the inversion system that the present invention is provided, by by the power output of dc source with
Corresponding predetermined power is compared；When the power output of dc source is more than the peak power that inverter can be exported, such as
When more than the first predetermined power, new MPPT maximum power point tracking instruction, control MPPT maximum power point tracking voltage are exported according to pre-
If step-length is gradually reduced；And dc source power output be more than the second predetermined power when, not only control maximum power point with
Track voltage is gradually reduced according to default step-length, while the adjusting means conducting of inverter direct-flow side is controlled, consumption dc source
Power output；When avoiding the power output of dc source more than the peak power that inverter can be exported, due to inverter work
In high voltage, caused by inverter longevity shorten and system lower power production.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly or in prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, the accompanying drawing in description is only this below
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the operating voltage control method of inversion system provided in an embodiment of the present invention；
Fig. 2 is the changing rule figure of the power output for the dc source that another embodiment of the present invention is provided；
Fig. 3 is the changing rule figure of the power output for the dc source that another embodiment of the present invention is provided；
Fig. 4 is the changing rule figure of the power output for the dc source that another embodiment of the present invention is provided；
Fig. 5 is the changing rule of the power output for the dc source that another embodiment of the present invention is provided；
Fig. 6 is the flow chart of the operating voltage control method for the inversion system that another embodiment of the present invention is provided；
Fig. 7 is the flow chart of the operating voltage control method for the inversion system that another embodiment of the present invention is provided；
Fig. 8 is the flow chart of the operating voltage control method for the inversion system that another embodiment of the present invention is provided；
Fig. 9 is the changing rule figure of the power output for the dc source that another embodiment of the present invention is provided；
Figure 10 is the structural representation for the inversion system that another embodiment of the present invention is provided；
Figure 11 is the structural representation for the stage type inversion system that another embodiment of the present invention is provided；
Figure 12 is the flow chart of the operating voltage control method for the inversion system that another embodiment of the present invention is provided；
Figure 13 is the flow chart of the operating voltage control method for the inversion system that another embodiment of the present invention is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
The present invention provides a kind of operating voltage control method of inversion system, to solve in the prior art in dc source
When power output is more than the peak power that inverter can be exported, the problem of influence inverter longevity is with system generated energy is reduced.
Specifically, the operating voltage control method of the inversion system, the controller applied to inversion system；, should referring to Fig. 1
The operating voltage control method of inversion system includes：
S101, the power output of dc source is compared with corresponding predetermined power；
These corresponding predetermined powers have certain relation with the peak power that inverter can be exported, by the device of inverter
Part design, height above sea level, environment temperature, DC bus-bar voltage etc. influence, you can to characterize under conditions present, what inverter can be exported
Peak power, and then can obtain whether the power output of dc source is more than the peak power that inverter can be exported.
If the power output of dc source is more than the first predetermined power, step S102 is performed；
S102, the new MPPT maximum power point tracking instruction of output, control MPPT maximum power point tracking voltage according to default step-length by
Gradually reduce；
First predetermined power can be a performance number more somewhat larger than the peak power that inverter can be exported, specifically
It can be set, be not specifically limited herein according to actual application environment.
When dc source power output be more than first predetermined power when, control by export new maximum power point with
Track is instructed, to control the MPPT maximum power point tracking voltage that dc source is exported, such as the output of the collector-shoe gear of photovoltaic battery panel
Voltage, is gradually reduced according to default step-length；Depending on the default step-length can be according to concrete application environment, specific limit is not done herein
It is fixed, in the protection domain of the application.
If the power output of dc source is more than the second predetermined power, step S103 is performed；
S103, the new MPPT maximum power point tracking instruction of output, control MPPT maximum power point tracking voltage according to default step-length by
Gradually reduce, and control to adjust device conducting；
The two ends of adjusting means are connected with the DC side both positive and negative polarity of inverter in inversion system, are arranged at dc source respectively
Between dc-link capacitance；
Second predetermined power is more than the first predetermined power, and the first predetermined power is more than the maximum work that inverter can be exported
Rate.
When the power output of dc source is more than second predetermined power higher than the first predetermined power, then conducting is needed
The adjusting means of inverter direct-flow side, can specifically control its normal open or copped wave to export, to consume the output work of dc source
Rate, it is to avoid the excessive power output of dc source is fully entered to inverter, causes the operating voltage of inverter to raise.
In specific practical application, the peak power Pinv_m that inverter can be exported by inverter design in itself,
The factors such as dc source (DC side photovoltaic battery panel) configuration, voltage, temperature, height above sea level are together decided on.What inverter can be exported
The maximum work that relation between peak power Pinv_m and the output voltage Udc of dc source can be exported referring to Fig. 2, inverter
Relation between rate Pinv_m and temperature T is referring to Fig. 3, the pass between peak power Pinv_m and height above sea level that inverter can be exported
System is referring to Fig. 4.
Under inverter normal operating conditions, controller control dc source is exported with MPPT maximum power point tracking voltage,
The power output of inverter is equal to the power output of the dc source of its reception；But, due to some factors, cause dc source
Maximum power point Pmpp when being more than the peak power Pinv_m that inverter can be exported, the power output of dc source and inversion
Relation between the operating voltage of device is referring to Fig. 5, peak power Pinv_m two operating voltages of correspondence that inverter can be exported：
Less operating voltage Uwork' and larger operating voltage Uwork；When the power output of dc source can more than inverter
During the peak power Pinv_m of output, the operating voltage of inverter will be increased to more than Uwork', the output work of dc source
Rate is bigger, and the operating voltage of inverter is higher, and the operating voltage is too high, it will influence inverter longevity, and high pressure occurs
The situation that drop volume is even shut down, so as to reduce system generated energy in some cases.
The operating voltage control method for the inversion system that the present embodiment is provided, is more than inverse in the power output of dc source
When becoming the peak power Pinv_m that device can be exported, such as when more than the first predetermined power, export new maximum power point with
Track instruction, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length；And be more than in the power output of dc source
During the second predetermined power, not only MPPT maximum power point tracking voltage is controlled gradually to be reduced according to default step-length, while controlling inverter
The adjusting means conducting of DC side, consumes the power output of dc source；The power output of dc source is avoided to be more than inverter
During the peak power Pinv_m that can be exported, because inverter is operated in high voltage, caused by inverter longevity shorten and
System lower power production.
What deserves to be explained is, in specific practical application, step S101 can be by the power output of dc source point
It is not compared with the first predetermined power and the second predetermined power, referring to Fig. 1, when the power output of dc source is pre- more than first
If during power, then performing step S102；When the power output of dc source is more than the second predetermined power, then step is performed
S103。
Or, referring to Fig. 6, step S101 can also be respectively with according to sequencing by the power output of dc source
One predetermined power and the second predetermined power are compared, specifically, step S101 includes：The step S111 first carried out, and in step
Step S112 after rapid S102；
S111, the power output of dc source is compared with the first predetermined power；
If the power output of dc source is more than the first predetermined power, is performing step S102, exporting new maximum work
After rate point trace command, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length, then perform step S112；
S112, the power output of dc source is compared with the second predetermined power；If the power output of dc source
During more than the second predetermined power, then perform the new MPPT maximum power point tracking instruction of step S103, output, control maximum power point with
Track voltage is gradually reduced according to default step-length, and controls to adjust device conducting.
The comparison of corresponding predetermined power is carried out according to sequencing as shown in Figure 6, maximum can be made by step S102
Power points floating voltage is gradually reduced, then judges whether to need to control to adjust device conducting, it is to avoid erroneous judgement and adjusting means
Turn on repeatedly.
On above-described embodiment and Fig. 1 to Fig. 6 basis, another embodiment of the present invention additionally provides a kind of specific inverse
The operating voltage control method of change system, referring to Fig. 7, including：
S201, the power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the first predetermined power, step S202 is performed；
S202, the new MPPT maximum power point tracking instruction of output, control MPPT maximum power point tracking voltage according to default step-length by
Gradually reduce；
If the power output of dc source is more than the second predetermined power, step S203 is performed；
S203, the new MPPT maximum power point tracking instruction of output, control MPPT maximum power point tracking voltage according to default step-length by
Gradually reduce, and control to adjust device conducting；
If the power output of dc source drops to less than the 3rd predetermined power, step S204 is performed；
S204, control and regulation device shut-off；
If the power output of dc source drops to less than the 4th predetermined power, step S205 is performed；
MPPT maximum power point tracking instruction under S205, output normal operating conditions；
Wherein, the 3rd predetermined power is less than the second predetermined power, and the 4th predetermined power is less than the first predetermined power, and the 3rd is pre-
If power is more than the 4th predetermined power, the 3rd predetermined power and the 4th predetermined power are more than or equal to the maximum that inverter can be exported
Power.
When the power output of dc source is more than the second predetermined power, controller will control the regulation of inverter direct-flow side
Device is turned on, to consume the power output of dc source, with being gradually reduced for dc source power output, when dc source
When power output drops to less than three predetermined powers, controller will control the adjusting means to turn off, and inverter will receive direct current
Whole power outputs of power supply.
When the power output of dc source is more than the first predetermined power and the second predetermined power, controller will be exported newly
MPPT maximum power point tracking instruction, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length；With maximum power point
The gradually reduction of floating voltage, the power output of dc source will be also gradually reduced, when the power output of dc source drops to
During less than four predetermined powers, controller instructs the MPPT maximum power point tracking exported under normal operating conditions, controls direct current
Source is normally exported with maximum power point voltage.
Work after being gradually reduced this gives the power output of dc source according to the control of controller is former
Reason；The value of 3rd predetermined power and the 4th predetermined power can be set according to specific application environment, not done herein
It is specific to limit, in the protection domain of the application.
In addition, step S201 can also be according to sequencing by the power output of dc source respectively with the first default work(
Rate and the second predetermined power are compared, then after execution of step S203, according still further to sequencing, first by the defeated of dc source
Go out power to be compared with the 3rd predetermined power, then after execution of step S204, then by the power output of dc source and the
Four predetermined powers are compared.
Depending on specifically can be according to its actual application environment, it be not specifically limited herein, the protection domain in the application
It is interior.
Another embodiment of the present invention additionally provides the operating voltage control method of another inversion system, in above-mentioned implementation
On example and Fig. 1 to Fig. 7 basis, the operating voltage control method of the inversion system is also included as shown in Figure 8：
The lower voltage limit of smaller operating voltage and inverter corresponding to S301, the peak power that can export inverter
It is compared；
If smaller operating voltage is less than lower voltage limit, step S302 is performed；
The new MPPT maximum power point tracking of S302, output instructs, controls MPPT maximum power point tracking voltage to be lower voltage limit, and controls
Adjusting means conducting processed.
Referring to Fig. 9, the peak power Pinv_m that the maximum power point Pmpp of dc source is more than that inverter can export is inverse
Become peak power Pinv_m two operating voltages of correspondence that device can be exported：Less operating voltage Uwork' and larger work
Voltage Uwork；If the lower voltage limit Umin of inverter is more than less operating voltage Uwork', controller will control direct current
The MPPT maximum power point tracking voltage in source is lower voltage limit, inverter is operated on its lower voltage limit Umin；Also, controller will
Device conducting is controlled to adjust, its normal open or copped wave is exported, to consume the power output of dc source, direct current source stream is reduced
Enter the power of inverter, it is to avoid the life-span of influence inverter and system generated energy.
Another embodiment of the present invention additionally provides a kind of inversion system, referring to Figure 10, including：Inverter 101, adjusting means
102 and controller；The two ends of adjusting means 102 are connected with the DC side both positive and negative polarity of inverter 101, are arranged at dc source respectively
Between dc-link capacitance C；
Controller is used to the power output of dc source being compared with corresponding predetermined power；If the output of dc source
Power is more than the first predetermined power, then export new MPPT maximum power point tracking instruction, control MPPT maximum power point tracking voltage according to
Default step-length is gradually reduced；If the power output of dc source be more than the second predetermined power, export new maximum power point with
Track instruction, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length, and control to adjust device conducting；Second presets
Power is more than the first predetermined power, and the first predetermined power is more than the peak power that inverter can be exported.
It is preferred that, controller is additionally operable to：
After device conducting is controlled to adjust, if the power output of dc source drops to less than the 3rd predetermined power,
Control to adjust device shut-off；
Gradually dropped according to default step-length exporting new MPPT maximum power point tracking instruction, control MPPT maximum power point tracking voltage
After low, if the power output of dc source drops to less than the maximum under the 4th predetermined power, output normal operating conditions
Power points trace command；
3rd predetermined power is less than the second predetermined power, and the 4th predetermined power is less than the first predetermined power, the 3rd default work(
Rate is more than the 4th predetermined power, and the 3rd predetermined power and the 4th predetermined power are more than or equal to the maximum work that inverter can be exported
Rate.
It is preferred that, controller is additionally operable to：
The lower voltage limit of smaller operating voltage and inverter corresponding to the peak power that inverter can be exported is carried out
Compare；If smaller operating voltage is less than lower voltage limit, export new MPPT maximum power point tracking instruction, control maximum power point with
Track voltage is lower voltage limit, and controls to adjust device conducting.
It is preferred that, controller is turned on for controlling to adjust device 102, specifically for：
Control to adjust the normal open of device 102 or copped wave output.
It is preferred that, referring to Fig. 9, adjusting means 102 includes：Resistance R0 and switch transistor T 0；
Resistance R0 is connected in series with switch transistor T 0, the DC side both positive and negative polarity phase of the two ends after series connection respectively with inverter 101
Even；
The control end of switch transistor T 0 is connected with controller.
It is preferred that, switch transistor T 0 is：MOSFET(Metal-Oxide-Semiconductor Field-Effect
Transistor, metal-oxide half field effect transistor), (Insulated Gate Bipolar Transistor, insulated gate is double by IGBT
Bipolar transistor) pliotron, (Intergrated Gate Commutated Thyristors, integral gate is changed IGCT
Flow IGCT) or D.C. contactor etc..It is not specifically limited herein, depending on its application environment, the protection in the application
In the range of.
In addition, controller can be single controller, it can also be integrated in inverter 101, not do specific limit herein
It is fixed, depending on its application environment, in the protection domain of the application.
Remaining operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Another embodiment of the present invention additionally provides a kind of operating voltage control method of inversion system, inverse applied to stage type
The controller of change system (as shown in figure 11)；The operating voltage control method of the inversion system referring to Figure 12, including：
S401, the power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the 5th predetermined power, step S402 is performed；
S402, the new MPPT maximum power point tracking instruction of output, control MPPT maximum power point tracking voltage according to default step-length by
Gradually reduce；
If the power output of dc source is more than the 6th predetermined power, step S403 is performed；
Switching tube (the T in such as Figure 11 in S403, control prime DC/DC converters1) conducting, make under DC bus-bar voltage
Drop；When DC bus-bar voltage drops to predetermined threshold value, controlling switch pipe shut-off, using predetermined threshold value as initial order voltage output
MPPT maximum power point tracking is instructed, until the power output of rear class inverter is the peak power that it can be exported；
6th predetermined power is more than the 5th predetermined power, and the 5th predetermined power is more than the maximum that rear class inverter can be exported
Power.
It is preferred that, the power output of dc source is compared with corresponding predetermined power in step S401, can be by
The power output of dc source is compared with the 5th predetermined power and the 6th predetermined power respectively according to sequencing, i.e. step
S401 is included as shown in fig. 13 that：
The step S411 first carried out, and step S412 after step s 102；
S411, the power output of dc source is compared with the 5th predetermined power；
If the power output of dc source is more than the 5th predetermined power, is performing step S402, exporting new maximum work
After rate point trace command, control MPPT maximum power point tracking voltage are gradually reduced according to default step-length, then perform step S412；
S412, the power output of dc source is compared with the 6th predetermined power；If the power output of dc source
During more than six predetermined powers, then the switching tube conducting in step S403, control prime DC/DC converters is performed, makes direct current female
Line voltage declines；When DC bus-bar voltage drops to predetermined threshold value, controlling switch pipe shut-off, using predetermined threshold value as initial order
Voltage output MPPT maximum power point tracking is instructed, until the power output of rear class inverter is the peak power that it can be exported.
The comparison of corresponding predetermined power is carried out according to sequencing as shown in fig. 13 that, maximum can be made by step S402
Power points floating voltage is gradually reduced, then judges whether to need the switching tube for controlling prime DC/DC converters to turn on, it is to avoid erroneous judgement
The conducting repeatedly of disconnected and switching tube.
Another embodiment of the present invention additionally provides another inversion system, as shown in figure 11, including：Rear class inverter
201st, controller and at least one prime DC/DC converters 202；
Controller is used for the operating voltage control method for performing above-described embodiment and Figure 12 and the inversion system described in Figure 13.
Remaining operation principle is same as the previously described embodiments, no longer repeats one by one herein.
The embodiment of each in the present invention is described by the way of progressive, and what each embodiment was stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
The above described is only a preferred embodiment of the present invention, not making any formal limitation to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and techniques content of the disclosure above to the present invention
Technical scheme makes many possible variations and modification, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, the technical spirit according to the present invention is to any simple modification made for any of the above embodiments, equivalent
Change and modify, still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. a kind of operating voltage control method of inversion system, it is characterised in that the controller applied to inversion system；It is described inverse
The operating voltage control method of change system includes：
The power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the first predetermined power, exports new MPPT maximum power point tracking instruction, control most
High-power floating voltage is gradually reduced according to default step-length；
If the power output of dc source is more than the second predetermined power, exports new MPPT maximum power point tracking instruction, control most
High-power floating voltage is gradually reduced according to default step-length, and controls to adjust device conducting；The two ends of the adjusting means point
It is not connected with the DC side both positive and negative polarity of inverter in inversion system, is arranged between dc source and dc-link capacitance；
Second predetermined power is more than first predetermined power, and first predetermined power is more than what inverter can be exported
Peak power.
2. the operating voltage control method of inversion system according to claim 1, it is characterised in that controlled to adjust described
After device conducting, in addition to：
If the power output of dc source drops to less than the 3rd predetermined power, the adjusting means is controlled to turn off；
Gradually dropped according to default step-length in the new MPPT maximum power point tracking instruction of the output, control MPPT maximum power point tracking voltage
After low, in addition to：
If the power output of dc source drops to less than the peak power under the 4th predetermined power, output normal operating conditions
Point trace command；
3rd predetermined power is less than second predetermined power, and the 4th predetermined power is less than the described first default work(
Rate, the 3rd predetermined power is more than the 4th predetermined power, and the 3rd predetermined power and the 4th predetermined power are big
In the peak power that can be exported equal to inverter.
3. the operating voltage control method of inversion system according to claim 2, it is characterised in that also include：
The lower voltage limit of smaller operating voltage and inverter corresponding to the peak power that inverter can be exported is compared；
If the smaller operating voltage is less than the lower voltage limit, new MPPT maximum power point tracking instruction, control maximum are exported
Power points floating voltage is the lower voltage limit, and controls the adjusting means to turn on.
4. according to the operating voltage control method of any described inversion system of claims 1 to 3, it is characterised in that the control
Adjusting means conducting processed, including：
The adjusting means normal open or copped wave is controlled to export.
5. according to the operating voltage control method of any described inversion system of claims 1 to 3, it is characterised in that described to incite somebody to action
The power output of dc source is compared with corresponding predetermined power, including：
First the power output of the dc source is compared with first predetermined power；
If the power output of the dc source is more than first predetermined power, refer in the MPPT maximum power point tracking for exporting new
Make, control after MPPT maximum power point tracking voltage gradually reduces according to default step-length, then by the power output of the dc source
It is compared with second predetermined power.
6. a kind of inversion system, it is characterised in that including：Inverter, adjusting means and controller；The two ends of the adjusting means
It is connected respectively with the DC side both positive and negative polarity of the inverter, is arranged between dc source and dc-link capacitance；
The controller is used for the operating voltage control method of any described inversion system of perform claim requirement 1 to 5.
7. inversion system according to claim 6, it is characterised in that the adjusting means includes：Resistance and switching tube；
The resistance is connected in series with the switching tube, the DC side both positive and negative polarity phase of the two ends after series connection respectively with the inverter
Even；
The control end of the switching tube is connected with the controller.
8. a kind of operating voltage control method of inversion system, it is characterised in that the controller applied to stage type inversion system；
The operating voltage control method of the inversion system includes：
The power output of dc source is compared with corresponding predetermined power；
If the power output of dc source is more than the 5th predetermined power, exports new MPPT maximum power point tracking instruction, control most
High-power floating voltage is gradually reduced according to default step-length；
If the power output of dc source is more than the switching tube conducting in the 6th predetermined power, control prime DC/DC converters,
Decline DC bus-bar voltage；When DC bus-bar voltage drops to predetermined threshold value, the switching tube shut-off is controlled, with described pre-
If threshold value instructs for the MPPT maximum power point tracking of initial order voltage output, until the power output of rear class inverter can be defeated for it
The peak power gone out；
6th predetermined power is more than the 5th predetermined power, and the 5th predetermined power can be defeated more than rear class inverter
The peak power gone out.
9. the operating voltage control method of inversion system according to claim 8, it is characterised in that described by dc source
Power output be compared with corresponding predetermined power, including：
First the power output of the dc source is compared with the 5th predetermined power；
If the power output of the dc source is more than the 5th predetermined power, refer in the MPPT maximum power point tracking for exporting new
Make, control after MPPT maximum power point tracking voltage gradually reduces according to default step-length, then by the power output of the dc source
It is compared with the 6th predetermined power.
10. a kind of inversion system, it is characterised in that including：Rear class inverter, controller and at least one prime DC/DC conversion
Device；
The controller is used for the operating voltage control method of the inversion system described in perform claim requirement 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317164.0A CN106972772B (en) | 2017-05-08 | 2017-05-08 | A kind of inversion system and its operating voltage control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317164.0A CN106972772B (en) | 2017-05-08 | 2017-05-08 | A kind of inversion system and its operating voltage control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106972772A true CN106972772A (en) | 2017-07-21 |
| CN106972772B CN106972772B (en) | 2019-04-09 |
Family
ID=59331862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710317164.0A Active CN106972772B (en) | 2017-05-08 | 2017-05-08 | A kind of inversion system and its operating voltage control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106972772B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787213A (en) * | 2017-11-13 | 2019-05-21 | 丰郅(上海)新能源科技有限公司 | Power supply system and its implementation |
| CN110957781A (en) * | 2019-12-02 | 2020-04-03 | 浙江大学 | Non-communication floating charge control method for two-stage series photovoltaic power optimizer system |
| CN114157231A (en) * | 2021-11-27 | 2022-03-08 | 深圳市禾望科技有限公司 | Photovoltaic inverter and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
| CN104767221A (en) * | 2015-04-21 | 2015-07-08 | 国家电网公司 | Voltage regulation method based on inverter power coordination control |
| CN106026172A (en) * | 2016-06-28 | 2016-10-12 | 阳光电源股份有限公司 | Distributed photovoltaic inverter system and power-limiting control method thereof |
-
2017
- 2017-05-08 CN CN201710317164.0A patent/CN106972772B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
| CN104767221A (en) * | 2015-04-21 | 2015-07-08 | 国家电网公司 | Voltage regulation method based on inverter power coordination control |
| CN106026172A (en) * | 2016-06-28 | 2016-10-12 | 阳光电源股份有限公司 | Distributed photovoltaic inverter system and power-limiting control method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787213A (en) * | 2017-11-13 | 2019-05-21 | 丰郅(上海)新能源科技有限公司 | Power supply system and its implementation |
| CN109787213B (en) * | 2017-11-13 | 2022-10-14 | 丰郅(上海)新能源科技有限公司 | Power supply system and implementation method thereof |
| CN110957781A (en) * | 2019-12-02 | 2020-04-03 | 浙江大学 | Non-communication floating charge control method for two-stage series photovoltaic power optimizer system |
| CN110957781B (en) * | 2019-12-02 | 2021-02-09 | 浙江大学 | Non-communication floating charge control method for two-stage series photovoltaic power optimizer system |
| CN114157231A (en) * | 2021-11-27 | 2022-03-08 | 深圳市禾望科技有限公司 | Photovoltaic inverter and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106972772B (en) | 2019-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104682431B (en) | Self-starting method and self-starting system of energy storage converter | |
| CN107732954B (en) | Online input control method and device for voltage source converter unit | |
| CN110042413A (en) | Non-grid connected wind power water electrolysis hydrogen production system and method | |
| CN108418455B (en) | A kind of control method of multi-electrical level inverter, device and inverter | |
| US10951131B2 (en) | Converter and method for driving converter | |
| CN106972772A (en) | A kind of inversion system and its operating voltage control method | |
| TWI694668B (en) | DC-DC converter and power conditioner | |
| US20210297009A1 (en) | Power conversion systems and methods | |
| JP6286801B2 (en) | Power converter | |
| CN105391371A (en) | Two-phase three-level inversion driving circuit based on six power switch tubes | |
| CN110571782B (en) | Energy control circuit and method | |
| CN109301855B (en) | Starting method and system of hybrid high-voltage flexible direct-current power grid | |
| US9722493B1 (en) | Power converter for ground-referenced system and floating system | |
| CN104242645B (en) | Method and device for controlling step-down circuits | |
| CN104378097B (en) | The drive system and method for a kind of insulated gate bipolar transistor | |
| CN103001518B (en) | Inversion device and method and inversion grid-connected power generation system | |
| CN113839407B (en) | Tidal current inversion control method and control device of direct current transmission system | |
| CN113258802B (en) | Submodule topological structure with direct-current fault clearing and self-voltage-equalizing capabilities | |
| CN108988649A (en) | The control method and photovoltaic inverting system of one photovoltaic DC-to-AC converter | |
| CN103916008A (en) | Output capacitance voltage-sharing control system and control method for three-level DC converter | |
| CN203352475U (en) | Bypass circuit of power unit cascaded high-voltage inverter | |
| CN109361232B (en) | Method and system for controlling voltage stabilization of extra-high voltage direct current layered feed-in power grid | |
| EP3079245A1 (en) | Control system and control method for controlling a switching device integrated in an electronic converter and switching cell comprising said system | |
| CN206402105U (en) | A kind of multi input high-gain DC/DC converters | |
| CN105720801B (en) | A kind of insulated gate bipolar transistor series average-voltage method based on Smooth Sliding-Mode control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |