CN106026172A - Distributed photovoltaic inverter system and power-limiting control method thereof - Google Patents
Distributed photovoltaic inverter system and power-limiting control method thereof Download PDFInfo
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Abstract
The application provides a distributed photovoltaic inverter system and a power-limiting control method thereof. An inverter generates and outputs a power difference value according to a preset power limit value and a grid-connected main power obtained by real-time collection; and when the power difference value meets a preset power-limiting condition, power adjusting modules in N independent power optimizers adjust PV voltages at respective input sides synchronously until the power difference value does not meet the preset power-limiting condition. Therefore, power-limiting control of the distributed photovoltaic inverter system is realized without the need to limit the grid-connected current of the inverter. Besides, because the PV voltages at respective input sides of all power optimizers are adjusted synchronously until the power difference value does not meet the preset power-limiting condition, the output limiting on the total output power of the whole inverter system is realized, so that problems in the prior art are solved.
Description
Technical field
The present invention relates to power converter technical field, particularly relate to a kind of collecting and distributing type photovoltaic inverting system and
Limit Poewr control method.
Background technology
Collecting and distributing type photovoltaic inverting system, combines group string data and the advantage of centralized inverter, to distributed
The generated energy in power station is obviously improved effect.Its system is constituted as it is shown in figure 1,1MW square formation includes 1
1MW centralized inverter, the power optimization device that N platform controls independently of one another, and 1 booster transformer；
N is positive integer.
In this system, the inverter of rear class works with DC voltage-stabilizing pattern, and N number of power optimization device of prime is complete
Become MPPT (Maximum Power Point Tracking, MPPT maximum power point tracking) search work.In other words,
The grid-connected power of this system is determined by N number of power optimization device of prime.It is thus impossible to by traditional method
Limit the grid-connected power of this system, that is limit the grid-connected current of inverter.Because the topology of this system is certainly
Having determined inverter to need to control and stable DC busbar voltage, otherwise dc bus is uncontrolled, even crosses punching,
Damage equipment.But when limiting the grid-connected current of inverter, its Voltage loop lost efficacy, it is impossible to control direct current female
Line voltage.
Further, can not be allowed each by the way of inverter issues limit power percentage by correspondence
Power optimization device each limits output by limit power percentage.Due to each power optimization device irradiation
Intensity is different, group string is differently configured, and some power optimization devices input energy is relatively big, and power is clamped down on；Have
Power optimization device input energy less, not yet reach power limit；The power that so system is total is not
Reaching power limit, limit power is inaccurate, wastes generated energy.And the number of the power optimization device run
Amount is not unalterable, and when running quantity minimizing, the generated energy of waste is more.
Based on above-mentioned variety of problems, it is provided that one can limit whole inversion system gross output rather than
The limit Poewr control method of separate unit power optimization device output, is problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of collecting and distributing type photovoltaic inverting system and limit Poewr control method thereof,
To solve the problem that prior art cannot limit whole inversion system gross output.
To achieve these goals, the technical scheme that the embodiment of the present invention provides is as follows:
The limit Poewr control method of a kind of collecting and distributing type photovoltaic inverting system, is applied to collecting and distributing type photovoltaic inversion system
System, described collecting and distributing type photovoltaic inverting system includes: inverter and N number of independent power optimization device, N is
Positive integer；The limit Poewr control method of described collecting and distributing type photovoltaic inverting system includes:
The grid-connected general power that described inverter obtains according to predetermined power limits value and Real-time Collection, generates also
Output difference；
When described power difference meets and limits power condition in advance, in described N number of independent power optimization device
The PV voltage of power regulation module synchronization control each input side, until described power difference is unsatisfactory for institute
State pre-power condition of limiting.
Preferably, described inverter includes: power collecting unit, difference computational unit and communication unit；
The grid-connected general power that described inverter obtains according to predetermined power limits value and Real-time Collection, generates and exports
The step of power difference includes:
Described power collecting unit Real-time Collection obtains described grid-connected general power；
Described difference computational unit is calculated described predetermined power limits value and deducts described grid-connected general power,
Generate described power difference；
Described communication unit exports described power difference by communication mode.
Preferably, the power regulation module in described N number of independent power optimization device all includes: algorithm is same
Step unit, dif ference judgment unit, power corrector and power adjustments ring；When described power difference meets pre-
During power condition of limiting, the power regulation module synchronization control in described N number of independent power optimization device is each
From the PV voltage of input side, until described power difference is unsatisfactory for the step bag of described pre-power condition of limiting
Include:
Same according to described inverter of described algorithm lock unit in described N number of independent power optimization device
Step clock, synchronizes the execution moment of power regulation module in described N number of independent power optimization device；
Described dif ference judgment unit in described N number of independent power optimization device all judges described power difference
Whether less than zero；
When described power difference is less than zero, the described power school in described N number of independent power optimization device
Positive device generates respective adjustment voltage according to described power difference；
Described power adjustments ring in described N number of independent power optimization device is by respective described adjustment voltage
The Voltage loop set-point obtained with respective MPPT algorithm is added, and generates respective power optimization device input side
PV voltage-regulation reference value；
Repeat above-mentioned steps, until described power difference is more than or equal to zero.
Preferably, the power regulation module in described N number of independent power optimization device the most also includes: output
Clipping unit；Described power corrector in described N number of independent power optimization device is according to described difference power
Also include after the step of the value respective adjustment voltage of generation:
Described output violent change unit in described N number of independent power optimization device is to respective described adjustment electricity
Pressure amplitude limit exports to corresponding power adjustments ring.
A kind of collecting and distributing type photovoltaic inverting system, including: inverter and N number of independent power optimization device, N
For positive integer；Described N number of independent power optimization device all includes power regulation module；
Described inverter is for the grid-connected general power obtained according to predetermined power limits value and Real-time Collection, raw
Become and output difference；
Described power regulation module in described N number of independent power optimization device is used to when described difference power
Value meets when limiting power condition in advance, and the PV voltage of synchronization control each input side, until described difference power
Value is unsatisfactory for described pre-power condition of limiting.
Preferably, described inverter includes:
Power collecting unit, obtains described grid-connected general power for Real-time Collection；
Difference computational unit, is used for being calculated described predetermined power limits value and deducts described grid-connected general power,
Generate described power difference；
Communication unit, for exporting described power difference by communication mode.
Preferably, the described power regulation module in described N number of independent power optimization device all includes:
Algorithm lock unit, for the synchronised clock according to described inverter, synchronizes described N number of independent
The execution moment of the power regulation module in power optimization device；
Dif ference judgment unit, is used for judging that whether described power difference is less than zero；
Power corrector, for when described power difference is less than zero, generates each according to described power difference
From adjustment voltage；
Power adjustments ring, for the voltage obtained with respective MPPT algorithm by respective described adjustment voltage
Ring set-point is added, and generates the PV voltage-regulation reference value of respective power optimization device input side.
Preferably, the described power regulation module in described N number of independent power optimization device the most also includes:
Output violent change unit, for exporting to corresponding power adjustments ring respective described adjustment voltage amplitude limit.
Preferably, also include: be connected to the transformator between described inverter output end and electrical network.
The limit Poewr control method of the described collecting and distributing type photovoltaic inverting system that the application provides, passes through inverter
The grid-connected general power obtained according to predetermined power limits value and Real-time Collection, generates and output difference；
Then when described power difference meets and limits power condition in advance, in described N number of independent power optimization device
The PV voltage of power regulation module synchronization control each input side, until described power difference is unsatisfactory for institute
State pre-power condition of limiting；Achieve the limit power for described collecting and distributing type photovoltaic inverting system to control, nothing
The grid-connected current of inverter need to be limited, simultaneously by the PV electricity of each power optimization device input side of synchronization control
Pressure, until described power difference is unsatisfactory for described pre-power condition of limiting, it is achieved be for whole inversion
The export-restriction of system gross output, solves problem of the prior art.
Accompanying drawing explanation
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 reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The structural representation of a kind of collecting and distributing type photovoltaic inverting system that Fig. 1 provides for prior art；
The limit power controlling party of a kind of collecting and distributing type photovoltaic inverting system that Fig. 2 provides for the application one embodiment
The flow chart of method；
The limit power of another collecting and distributing type photovoltaic inverting system that Fig. 3 provides for another embodiment of the application controls
The flow chart of method；
The power of the collecting and distributing type photovoltaic inverting system that Fig. 4 provides for another embodiment of the application adjusts schematic diagram；
The power of the power optimization device unit that Fig. 5 provides for another embodiment of the application adjusts schematic diagram.
Detailed description of the invention
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
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
The invention provides the limit Poewr control method of a kind of collecting and distributing type photovoltaic inverting system, existing to solve
The problem that technology cannot limit whole inversion system gross output.
Concrete, the limit Poewr control method of collecting and distributing type photovoltaic inverting system, it is applied to collecting and distributing type photovoltaic inverse
Change system, described collecting and distributing type photovoltaic inverting system includes: inverter and N number of independent power optimization device,
N is positive integer；The limit Poewr control method of described collecting and distributing type photovoltaic inverting system is as in figure 2 it is shown, include:
The grid-connected general power that S101, described inverter obtain according to predetermined power limits value and Real-time Collection,
Generate and output difference；
In described collecting and distributing type photovoltaic inverting system, predetermined power limits valueAccording to actual should
The system power limits value being set with environment；Predetermined power limits valueWith described inversion
The actual grid-connected general power that device Real-time Collection obtainsBetween difference, it is possible to embody presently described
Collecting and distributing type photovoltaic inverting system is the need of carrying out limiting power control；Concrete, when grid-connected general powerMore than predetermined power limits valueTime, presently described collecting and distributing type photovoltaic inverting system is described
Needs carry out limiting power and control.
S102, when described power difference meet limit in advance power condition time, described N number of independent power is excellent
The PV voltage of the power regulation module synchronization control each input side in change device, until described power difference is not
Meet described pre-power condition of limiting.
Described pre-power condition of limiting can be that described power difference embodies grid-connected general powerGreatly
In predetermined power limits valueTime concrete setting, be not specifically limited herein.According to photovoltaic group
The PV curve of part, is appreciated that increase PV voltage, can reduce its output.Therefore, when described
Power difference meet described pre-limit power condition time, the power in described N number of independent power optimization device
Adjusting module synchronizes to increase the PV voltage of respective input side, can reduce grid-connected general powerDirectly
No longer meeting described pre-power condition of limiting to described power difference, it is achieved that output work total to system
The restriction of rate.
The limit Poewr control method of the collecting and distributing type photovoltaic inverting system described in the present embodiment, passes through above-mentioned steps
Achieve the limit power for described collecting and distributing type photovoltaic inverting system to control, it is not necessary to limit the grid-connected of inverter
Electric current, simultaneously by the PV voltage of each power optimization device input side of synchronization control, until described difference power
Value is unsatisfactory for described pre-power condition of limiting, it is achieved be defeated for whole inversion system gross output
Go out to limit, relative to the prior art method by percentage limit power optimization device monomer power, more
Rationally, it is achieved that the optimization of generating.
What deserves to be explained is, described inverter as the measuring mechanism of described collecting and distributing type photovoltaic inverting system,
Numerous described power optimization devices is as the actuator of described collecting and distributing type photovoltaic inverting system；Actuator
A lot, and actuator controls to separate with measuring mechanism, needs to coordinate each other and coordinates, otherwise holding
Easily cause output vibration；Therefore the present embodiment passes through described N number of independent power optimization device to each
The synchronization control of the PV voltage of input side, it is to avoid the problems referred to above；And without adding any hardware cost.
It addition, the present embodiment constitutes system by described inverter and described N number of independent power optimization device
The closed loop control of gross output, not only control accuracy is high, and at the operation number of described power optimization device
When amount and input energy change, it is possible to realize self adaptation dynamic calibration.
In another specific embodiment of the present invention, described inverter includes: power collecting unit, difference meter
Calculate unit and communication unit；On the basis of Fig. 2, it is preferred that as it is shown on figure 3, step S101 bag
Include:
S1011, described power collecting unit Real-time Collection obtain described grid-connected general power；
S1012, described difference computational unit be calculated described predetermined power limits value deduct described grid-connected always
Power, generates described power difference；
S1013, described communication unit export described power difference by communication mode.
The predetermined power limits value that described inverter will be configured according to actual application environmentWith
The grid-connected general power collectedDiffer from, and by this power differenceIt is handed down to all power optimization devices by communication mode.
Preferably, the power regulation module in described N number of independent power optimization device all includes: algorithm is same
Step unit, dif ference judgment unit, power corrector and power adjustments ring；As it is shown on figure 3, step S102
Including:
Described algorithm lock unit in S1021, described N number of independent power optimization device is according to described inversion
The synchronised clock of device, when synchronizing the execution of power regulation module in described N number of independent power optimization device
Carve；
It is described N number of independent that described synchronised clock can also be that described inverter is handed down to by communication mode
Power optimization device, it is not specifically limited herein.Synchronize described N number of independent by described synchronised clock
The execution moment of the power regulation module in power optimization device so that it is inverter described in same time response
Scheduling.
Described dif ference judgment unit in S1022, described N number of independent power optimization device all judges described merit
Whether rate difference is less than zero；
WhenTime, representNeed to limit power, now increase input
The PV voltage of side, reaches to drop the purpose of power.
S1023, when described power difference is less than zero, described in described N number of independent power optimization device
Power corrector generates respective adjustment voltage according to described power difference；
Each described power corrector according toGenerate respective adjustment voltage Vdelta。
Described power adjustments ring in S1025, described N number of independent power optimization device is by respective described tune
The Voltage loop set-point that whole voltage obtains with respective MPPT algorithm is added, and generates respective power optimization device defeated
Enter the PV voltage-regulation reference value of side；
Each described power adjustments ring, will adjust voltage VdeltaThe Voltage loop obtained with respective MPPT algorithm
Set-point VrefIt is added the PV voltage-regulation reference value as respective power optimization device input sideControl
PV voltage processed.
Repeat above-mentioned steps, until described power difference is more than or equal to zero.
Being more highly preferred to, the power regulation module in described N number of independent power optimization device the most also includes:
Output violent change unit；As it is shown on figure 3, also include after step S1023:
Described output violent change unit in S1024, described N number of independent power optimization device is to respective described
Adjust voltage amplitude limit to export to corresponding power adjustments ring.
The adjustment voltage V that described power corrector can be exported by described output violent change unitdeltaAmplitude limit is in advance
If scopeIn, and then avoid correction excessively.
Another embodiment of the present invention additionally provides a kind of collecting and distributing type photovoltaic inverting system, as described in Figure 4, bag
Include: inverter 101 and N number of independent power optimization device 102, N is positive integer；N number of independent merit
Rate optimizer 102 all includes power regulation module；
Inverter 101 is for according to predetermined power limits valueWith Real-time Collection obtain grid-connected always
PowerGenerate and output difference
Described power regulation module in N number of independent power optimization device 102 is used to work as power differenceMeeting when limiting power condition in advance, the PV voltage of synchronization control each input side, until power
DifferenceIt is unsatisfactory for described pre-power condition of limiting.
Collecting and distributing type photovoltaic inverting system described in the present embodiment, is achieved for described collection by above-mentioned principle
The limit power dissipating formula photovoltaic inverting system controls, it is not necessary to limit the grid-connected current of inverter, simultaneously by same
The PV voltage of each power optimization device input side of successive step, until described power difference is unsatisfactory for described presetting
Limit power condition, it is achieved be the export-restriction for whole inversion system gross output, relative to existing
There is the method that technology passes through percentage limit power optimization device monomer power, the most rationally, it is achieved that generating
Optimization.
What deserves to be explained is, the present embodiment passes through described N number of independent power optimization device to respective input side
The synchronization control of PV voltage, it is to avoid actuator controls to separate to easily cause output work with measuring mechanism
The problem of rate vibration；And without adding any hardware cost.By described inverter and described N number of solely
Vertical power optimization device constitutes the closed loop control of system gross output, and not only control accuracy is high, Er Qie
When the operation quantity of described power optimization device and input energy change, it is possible to realize the dynamic school of self adaptation
Just.
In another specific embodiment of the present invention, the power of described collecting and distributing type photovoltaic inverting system adjusts signal
As shown in Figure 4, inverter 101 includes figure:
Power collecting unit 111, obtains grid-connected general power for Real-time Collection
Difference computational unit 112, is used for being calculated predetermined power limits valueDeduct grid-connected always
PowerGenerate power difference
Communication unit 113, for by communication mode output difference
Certainly, as shown in Figure 4, inverter 101 also includes inversion unit 114, is used for collecting all power
The dc power of optimizer 102, is converted into AC power and carries out grid-connected.Can answer according to concrete reality
Select with environment, be not specifically limited herein.
Preferably, as it is shown in figure 5, the described power in described N number of independent power optimization device adjusts mould
Block all includes:
Algorithm lock unit 121, for the synchronised clock clock according to described inverter, synchronizes described N
The execution moment of the power regulation module in individual independent power optimization device；
Preferably, inverter 101 issues synchronised clock clock also by communication mode.
Dif ference judgment unit 122, is used for judging power differenceWhether less than zero；
Power corrector 123, for working as power differenceDuring less than zero, according to power differenceGenerate respective adjustment voltage Vdelta；
Power adjustments ring 125, for by respective adjustment voltage VdeltaObtain with respective MPPT algorithm
Voltage loop set-point VrefIt is added, generates the PV voltage-regulation reference value of respective power optimization device input side
Preferably, as it is shown in figure 5, the described power in described N number of independent power optimization device adjusts mould
Block the most also includes: output violent change unit 124, for respective adjustment voltage VdeltaAmplitude limit exports to phase
The power adjustments ring 125 answered.
Preferably, as it is shown in figure 5, described power optimization device also includes MPPT controller 126 and DC/DC
Changer 127, both concrete implementation forms, it is not specifically limited herein, can specifically apply ring depending on it
Depending on border.
Preferably, collecting and distributing type photovoltaic inverting system also includes: be connected to described inverter output end and electrical network
Between transformator.
Described transformator is specifically as follows booster transformer, identical with application of the prior art, the most not
Repeat again.
In the present invention, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is
With the difference of other embodiments, between each embodiment, identical similar portion sees mutually.Right
For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so describe
Fairly simple, relevant part sees method part and illustrates.
Below it is only the preferred embodiment of the present invention, makes to skilled artisans appreciate that or realize this
Invention.Multiple amendment to these embodiments will be apparent to one skilled in the art,
Generic principles defined herein can without departing from the spirit or scope of the present invention, at it
Its embodiment realizes.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and
It is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (9)
1. the limit Poewr control method of a collecting and distributing type photovoltaic inverting system, it is characterised in that be applied to collection
Dissipating formula photovoltaic inverting system, described collecting and distributing type photovoltaic inverting system includes: inverter and N number of independent merit
Rate optimizer, N is positive integer；The limit Poewr control method of described collecting and distributing type photovoltaic inverting system includes:
The grid-connected general power that described inverter obtains according to predetermined power limits value and Real-time Collection, generates also
Output difference；
When described power difference meets and limits power condition in advance, in described N number of independent power optimization device
The PV voltage of power regulation module synchronization control each input side, until described power difference is unsatisfactory for institute
State pre-power condition of limiting.
The limit Poewr control method of collecting and distributing type photovoltaic inverting system the most according to claim 1, it is special
Levying and be, described inverter includes: power collecting unit, difference computational unit and communication unit；Described
The grid-connected general power that inverter obtains according to predetermined power limits value and Real-time Collection, generates and output
The step of difference includes:
Described power collecting unit Real-time Collection obtains described grid-connected general power；
Described difference computational unit is calculated described predetermined power limits value and deducts described grid-connected general power,
Generate described power difference；
Described communication unit exports described power difference by communication mode.
The limit Poewr control method of collecting and distributing type photovoltaic inverting system the most according to claim 2, it is special
Levying and be, the power regulation module in described N number of independent power optimization device all includes: algorithm synchronizes single
Unit, dif ference judgment unit, power corrector and power adjustments ring；Limit in advance when described power difference meets
During power condition, the power regulation module synchronization control in described N number of independent power optimization device is the most defeated
Enter the PV voltage of side, until the step that described power difference is unsatisfactory for described pre-power condition of limiting includes:
Same according to described inverter of described algorithm lock unit in described N number of independent power optimization device
Step clock, synchronizes the execution moment of power regulation module in described N number of independent power optimization device；
Described dif ference judgment unit in described N number of independent power optimization device all judges described power difference
Whether less than zero；
When described power difference is less than zero, the described power school in described N number of independent power optimization device
Positive device generates respective adjustment voltage according to described power difference；
Described power adjustments ring in described N number of independent power optimization device is by respective described adjustment voltage
The Voltage loop set-point obtained with respective MPPT algorithm is added, and generates respective power optimization device input side
PV voltage-regulation reference value；
Repeat above-mentioned steps, until described power difference is more than or equal to zero.
The limit Poewr control method of collecting and distributing type photovoltaic inverting system the most according to claim 3, it is special
Levying and be, the power regulation module in described N number of independent power optimization device the most also includes: output violent change
Unit；Described power corrector in described N number of independent power optimization device is raw according to described power difference
Also include after becoming the step of respective adjustment voltage:
Described output violent change unit in described N number of independent power optimization device is to respective described adjustment electricity
Pressure amplitude limit exports to corresponding power adjustments ring.
5. a collecting and distributing type photovoltaic inverting system, it is characterised in that including: inverter and N number of independent
Power optimization device, N is positive integer；Described N number of independent power optimization device all includes power regulation module；
Described inverter is for the grid-connected general power obtained according to predetermined power limits value and Real-time Collection, raw
Become and output difference；
Described power regulation module in described N number of independent power optimization device is used to when described difference power
Value meets when limiting power condition in advance, and the PV voltage of synchronization control each input side, until described difference power
Value is unsatisfactory for described pre-power condition of limiting.
Collecting and distributing type photovoltaic inverting system the most according to claim 5, it is characterised in that described inversion
Device includes:
Power collecting unit, obtains described grid-connected general power for Real-time Collection；
Difference computational unit, is used for being calculated described predetermined power limits value and deducts described grid-connected general power,
Generate described power difference；
Communication unit, for exporting described power difference by communication mode.
Collecting and distributing type photovoltaic inverting system the most according to claim 6, it is characterised in that described N number of
The independent described power regulation module in power optimization device all includes:
Algorithm lock unit, for the synchronised clock according to described inverter, synchronizes described N number of independent
The execution moment of the power regulation module in power optimization device；
Dif ference judgment unit, is used for judging that whether described power difference is less than zero；
Power corrector, for when described power difference is less than zero, generates each according to described power difference
From adjustment voltage；
Power adjustments ring, for the voltage obtained with respective MPPT algorithm by respective described adjustment voltage
Ring set-point is added, and generates the PV voltage-regulation reference value of respective power optimization device input side.
Collecting and distributing type photovoltaic inverting system the most according to claim 7, it is characterised in that described N number of
The independent described power regulation module in power optimization device the most also includes: output violent change unit, for right
Respective described adjustment voltage amplitude limit exports to corresponding power adjustments ring.
9. according to the arbitrary described collecting and distributing type photovoltaic inverting system of claim 5 to 8, it is characterised in that
Also include: be connected to the transformator between described inverter output end and electrical network.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786737A (en) * | 2016-12-22 | 2017-05-31 | 国电南京自动化股份有限公司 | A kind of low voltage traversing control method for collecting and distributing type photovoltaic generating system |
| CN106786804A (en) * | 2017-03-24 | 2017-05-31 | 阳光电源股份有限公司 | Light storage mixing grid-connected system power output regulation and control method and EMS |
| CN106849179A (en) * | 2017-04-18 | 2017-06-13 | 阳光电源股份有限公司 | Photovoltaic generation control method and photovoltaic plant |
| CN106972772A (en) * | 2017-05-08 | 2017-07-21 | 阳光电源股份有限公司 | A kind of inversion system and its operating voltage control method |
| CN107154642A (en) * | 2017-06-08 | 2017-09-12 | 阳光电源股份有限公司 | A kind of grid-connected photovoltaic system and its direct current bus voltage control method and device |
| CN107248843A (en) * | 2017-05-31 | 2017-10-13 | 华为技术有限公司 | A kind of control method of photovoltaic generation, control device and photovoltaic generating system |
| CN107623488A (en) * | 2017-08-29 | 2018-01-23 | 深圳市禾望电气股份有限公司 | Limit Poewr control method, collecting and distributing type photovoltaic combiner box and storage medium |
| CN108258718A (en) * | 2016-12-29 | 2018-07-06 | 北京天诚同创电气有限公司 | Inverter, collecting and distributing type header box, limit power control system and method |
| WO2018206010A1 (en) * | 2017-05-12 | 2018-11-15 | Huawei Technologies Co., Ltd. | Power systems with inverter input voltage control |
| CN109167392A (en) * | 2018-10-09 | 2019-01-08 | 珠海格力电器股份有限公司 | A kind of system control method and photovoltaic system and air-conditioning system |
| CN109888827A (en) * | 2019-03-13 | 2019-06-14 | 阳光电源股份有限公司 | Photovoltaic combining inverter power limitation method, device, controller and inverter |
| CN116760107A (en) * | 2023-08-16 | 2023-09-15 | 锦浪科技股份有限公司 | Method, system and storage medium for over-distribution load limiting of photovoltaic inverter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001224183A (en) * | 2000-02-08 | 2001-08-17 | Okinawa Electric Power Co Ltd | Link inverter having dc power limiting function |
| CN103354365A (en) * | 2013-06-26 | 2013-10-16 | 国家电网公司 | Intelligent power adjusting method for photovoltaic power station |
| CN103378603A (en) * | 2012-04-24 | 2013-10-30 | 通用电气公司 | Open-circuit fault detection device, converter controller, and energy conversion system and method |
| CN103762620A (en) * | 2013-05-10 | 2014-04-30 | 南京南瑞集团公司 | New-energy connected-grid power control method based on prediction and adjustment performance and safety constraint |
| CN103855726A (en) * | 2014-03-05 | 2014-06-11 | 深圳市长昊机电有限公司 | Photovoltaic power generation control system and control method of photovoltaic power generation system |
| CN104779823A (en) * | 2015-05-08 | 2015-07-15 | 阳光电源股份有限公司 | Method and device for controlling photovoltaic inverter and photovoltaic inverter system |
-
2016
- 2016-06-28 CN CN201610500005.XA patent/CN106026172B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001224183A (en) * | 2000-02-08 | 2001-08-17 | Okinawa Electric Power Co Ltd | Link inverter having dc power limiting function |
| CN103378603A (en) * | 2012-04-24 | 2013-10-30 | 通用电气公司 | Open-circuit fault detection device, converter controller, and energy conversion system and method |
| CN103762620A (en) * | 2013-05-10 | 2014-04-30 | 南京南瑞集团公司 | New-energy connected-grid power control method based on prediction and adjustment performance and safety constraint |
| CN103354365A (en) * | 2013-06-26 | 2013-10-16 | 国家电网公司 | Intelligent power adjusting method for photovoltaic power station |
| CN103855726A (en) * | 2014-03-05 | 2014-06-11 | 深圳市长昊机电有限公司 | Photovoltaic power generation control system and control method of photovoltaic power generation system |
| CN104779823A (en) * | 2015-05-08 | 2015-07-15 | 阳光电源股份有限公司 | Method and device for controlling photovoltaic inverter and photovoltaic inverter system |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786737A (en) * | 2016-12-22 | 2017-05-31 | 国电南京自动化股份有限公司 | A kind of low voltage traversing control method for collecting and distributing type photovoltaic generating system |
| CN106786737B (en) * | 2016-12-22 | 2019-03-08 | 国电南京自动化股份有限公司 | A kind of low voltage traversing control method for collecting and distributing type photovoltaic generating system |
| CN108258718A (en) * | 2016-12-29 | 2018-07-06 | 北京天诚同创电气有限公司 | Inverter, collecting and distributing type header box, limit power control system and method |
| CN106786804A (en) * | 2017-03-24 | 2017-05-31 | 阳光电源股份有限公司 | Light storage mixing grid-connected system power output regulation and control method and EMS |
| CN106786804B (en) * | 2017-03-24 | 2020-03-24 | 阳光电源股份有限公司 | Output power regulation and control method and energy management system of light storage hybrid grid-connected power generation system |
| CN106849179A (en) * | 2017-04-18 | 2017-06-13 | 阳光电源股份有限公司 | Photovoltaic generation control method and photovoltaic plant |
| CN106849179B (en) * | 2017-04-18 | 2020-07-07 | 阳光电源股份有限公司 | Photovoltaic power generation control method and photovoltaic power station |
| CN106972772A (en) * | 2017-05-08 | 2017-07-21 | 阳光电源股份有限公司 | A kind of inversion system and its operating voltage control method |
| CN106972772B (en) * | 2017-05-08 | 2019-04-09 | 阳光电源股份有限公司 | A kind of inversion system and its operating voltage control method |
| US11437823B2 (en) | 2017-05-12 | 2022-09-06 | Huawei Digital Power Technologies Co., Ltd. | Power systems with inverter input voltage control |
| WO2018206010A1 (en) * | 2017-05-12 | 2018-11-15 | Huawei Technologies Co., Ltd. | Power systems with inverter input voltage control |
| US10536002B2 (en) | 2017-05-12 | 2020-01-14 | Futurewei Technologies, Inc. | Power systems with inverter input voltage control |
| CN107248843B (en) * | 2017-05-31 | 2019-04-05 | 华为技术有限公司 | A kind of control method of photovoltaic power generation, control equipment and photovoltaic generating system |
| WO2018219256A1 (en) * | 2017-05-31 | 2018-12-06 | 华为技术有限公司 | Photovoltaic power generation control method, control device, and photovoltaic power generation system |
| CN107248843A (en) * | 2017-05-31 | 2017-10-13 | 华为技术有限公司 | A kind of control method of photovoltaic generation, control device and photovoltaic generating system |
| US11652442B2 (en) | 2017-05-31 | 2023-05-16 | Huawei Digital Power Technologies Co., Ltd. | Method for controlling photovoltaic power generation, control device, and photovoltaic power generation system |
| CN107154642B (en) * | 2017-06-08 | 2020-02-14 | 合肥阳光智维科技有限公司 | Photovoltaic grid-connected power generation system and direct current bus voltage control method and device thereof |
| CN107154642A (en) * | 2017-06-08 | 2017-09-12 | 阳光电源股份有限公司 | A kind of grid-connected photovoltaic system and its direct current bus voltage control method and device |
| CN107623488A (en) * | 2017-08-29 | 2018-01-23 | 深圳市禾望电气股份有限公司 | Limit Poewr control method, collecting and distributing type photovoltaic combiner box and storage medium |
| CN109167392A (en) * | 2018-10-09 | 2019-01-08 | 珠海格力电器股份有限公司 | A kind of system control method and photovoltaic system and air-conditioning system |
| CN109167392B (en) * | 2018-10-09 | 2020-07-24 | 珠海格力电器股份有限公司 | System control method, photovoltaic system and air conditioning system |
| CN109888827A (en) * | 2019-03-13 | 2019-06-14 | 阳光电源股份有限公司 | Photovoltaic combining inverter power limitation method, device, controller and inverter |
| CN109888827B (en) * | 2019-03-13 | 2020-11-10 | 阳光电源股份有限公司 | Photovoltaic grid-connected inverter power limiting method and device, controller and inverter |
| CN116760107A (en) * | 2023-08-16 | 2023-09-15 | 锦浪科技股份有限公司 | Method, system and storage medium for over-distribution load limiting of photovoltaic inverter |
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