CN109347140A - Photovoltaic air conditioner, control method and device thereof, direct current power grid and readable storage medium - Google Patents
Photovoltaic air conditioner, control method and device thereof, direct current power grid and readable storage medium Download PDFInfo
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- CN109347140A CN109347140A CN201811188216.XA CN201811188216A CN109347140A CN 109347140 A CN109347140 A CN 109347140A CN 201811188216 A CN201811188216 A CN 201811188216A CN 109347140 A CN109347140 A CN 109347140A
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- air
- conditioner
- grid
- side converter
- control device
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000005611 electricity Effects 0.000 claims description 23
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H02J3/383—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
- F24F2005/0067—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a photovoltaic air conditioner, a control method and a control device thereof, a direct current power grid and a readable storage medium. This photovoltaic air conditioner includes: the system comprises a grid-side converter and a photovoltaic air conditioner control device, wherein the photovoltaic air conditioner is used for opening a direct current bus as a direct current energy source for other direct current loads; and the photovoltaic air conditioner control device is used for limiting the power output of the grid-side converter under the condition of multi-direct-current load power utilization. According to the invention, through power control, the grid-side converter limits the grid-side power output under the condition of multi-direct-current load power utilization, so that the output of the grid-side converter within the rated power can be ensured.
Description
Technical field
The present invention relates to PV air-conditioner field, in particular to a kind of PV air-conditioner and its control method and device, direct current
Net and readable storage medium storing program for executing.
Background technique
With the universal use of PV air-conditioner, the relevant technologies are proposed: straight to be formed based on the open DC bus of PV air-conditioner
Household micro-capacitance sensor or direct current are flowed for electricity consumption port, thus solves the power issue of direct-current grid, and well as friendship
The shared transition of direct current.
Summary of the invention
It is found by the applicant that: due to this application of PV air-conditioner, the unstability of photovoltaic power generation, needs to consider net side in addition
The power of current transformer is greater than pressure generator-side converter wear power, so that open DC bus has the ability with DC load；And by
DC load equipment is brought into open DC bus, and there are more capacitive loads to exist for the relevant technologies, and leads to PV air-conditioner system
The problem of starting failure.The presence of two problems as above results in PV air-conditioner higher cost, and in open DC bus
PV air-conditioner under system starts abnormal.
In view of at least one of the above technical problem, the present invention provides a kind of PV air-conditioner and its control method and dresses
It sets, DC grid and readable storage medium storing program for executing, net side power output can be limited, guarantee that grid-side converter is defeated within rated power
Out.
According to an aspect of the present invention, a kind of PV air-conditioner, including grid-side converter and PV air-conditioner control dress are provided
It sets, in which:
PV air-conditioner is used for opening DC bus as DC energy source for other DC loads；
PV air-conditioner control device, for limiting the power output of grid-side converter in more DC load electricity consumptions.
In some embodiments of the invention, PV air-conditioner control device, for setting the rated power of grid-side converter
Be set to and generator-side converter wear rated power it is consistent.
In some embodiments of the invention, PV air-conditioner control device, for controlling net side by energy management system
The actual motion power output of current transformer is not more than the rated power of grid-side converter.
In some embodiments of the invention, the grid-side converter includes multiple grid-side converter modules；
PV air-conditioner control device becomes for the load power grade according to the open DC load of DC bus for net side
Flow the grid-side converter module of device addition respective numbers.
In some embodiments of the invention, the grid-side converter includes charge-variable circuit.
In some embodiments of the invention, the on-off mode that the charge-variable circuit uses resistance value can be changed.
In some embodiments of the invention, PV air-conditioner control device, for increasing in PV air-conditioner system start-up phase
Big charging current limiter resistance；Charging current limiter resistance is adjusted according to charging situation.
In some embodiments of the invention, PV air-conditioner control device, for adopting in PV air-conditioner system start-up phase
Charge-variable circuit is controlled with the on-off mode of dispersion.
In some embodiments of the invention, the PV air-conditioner further includes that the direct current supply of each DC load is arranged in enter
Controllable switch at mouthful, in which:
PV air-conditioner control device is run for starting in PV air-conditioner system, after bypassing charging circuit, is controlled each straight
Current load incision.
In some embodiments of the invention, PV air-conditioner control device is run for starting in PV air-conditioner system, other
After charging circuit is fallen on road, controls each DC load and cut in batches.
In some embodiments of the invention, PV air-conditioner control device, for by the busbar voltage of each DC load
Starting voltage is set as PV air-conditioner voltage rating.
According to another aspect of the present invention, a kind of PV air-conditioner, including grid-side converter are provided, in which:
PV air-conditioner is used for opening DC bus as DC energy source for other DC loads；
The grid-side converter includes charge-variable circuit.
According to another aspect of the present invention, a kind of PV air-conditioner control method is provided, comprising:
In more DC load electricity consumptions, the power output of the grid-side converter of PV air-conditioner is limited, wherein the light
Lying prostrate air-conditioning is the PV air-conditioner as described in above-mentioned any embodiment.
In some embodiments of the invention, the power output of the grid-side converter of the limitation PV air-conditioner includes:
By the rated power of grid-side converter be set as with and generator-side converter wear rated power it is consistent；
It is not more than the volume of grid-side converter by the actual motion power output that upper layer energy management system controls grid-side converter
Determine power.
In some embodiments of the invention, the power output of the grid-side converter of the limitation PV air-conditioner includes:
According to the load power grade of the open DC load of DC bus, the net side of respective numbers is added for grid-side converter
Converter module.
In some embodiments of the invention, the PV air-conditioner control method further include:
In PV air-conditioner system start-up phase, increase the charging current limiter resistance of charge-variable circuit in grid-side converter；
The charging current limiter resistance is adjusted according to charging situation.
In some embodiments of the invention, the PV air-conditioner control method further include:
In PV air-conditioner system start-up phase, charge-variable circuit is controlled using the on-off mode of dispersion.
In some embodiments of the invention, the PV air-conditioner control method further include:
Start in PV air-conditioner system and run, after bypassing charging circuit, controls each DC load and cut in batches.
In some embodiments of the invention, the PV air-conditioner control method further include:
PV air-conditioner voltage rating is set by the starting voltage of the busbar voltage of each DC load.
According to another aspect of the present invention, a kind of PV air-conditioner control method is provided, comprising:
In PV air-conditioner system start-up phase, increase the charging current limiter resistance of charge-variable circuit in grid-side converter,
In, the PV air-conditioner is the PV air-conditioner as described in above-mentioned any embodiment；
The charging current limiter resistance is adjusted according to charging situation.
According to another aspect of the present invention, a kind of PV air-conditioner control device is provided, comprising:
Power limiting unit, for limiting the function of the grid-side converter of PV air-conditioner in more DC load electricity consumptions
Rate output, wherein the PV air-conditioner is the PV air-conditioner as described in above-mentioned any embodiment.
In some embodiments of the invention, the PV air-conditioner control device realizes such as any of the above-described implementation for executing
The operation of PV air-conditioner control method described in example.
In some embodiments of the invention, the PV air-conditioner control device is the light as described in above-mentioned any embodiment
Lie prostrate the PV air-conditioner control device of air-conditioning.
According to another aspect of the present invention, a kind of PV air-conditioner control device is provided, comprising:
Memory, for storing instruction；
Processor, for executing described instruction, so that the battery charge controller, which executes, realizes such as above-mentioned any embodiment
The operation of the PV air-conditioner control method.
According to another aspect of the present invention, a kind of DC grid is provided, including the photovoltaic as described in above-mentioned any embodiment
Air-conditioning.
According to another aspect of the present invention, a kind of computer readable storage medium, the computer-readable storage medium are provided
Matter is stored with computer instruction, and the PV air-conditioner control as described in above-mentioned any embodiment is realized when described instruction is executed by processor
The operation of method processed.
The present invention is by power control, and by grid-side converter in more DC load electricity consumptions, limitation net side power is defeated
Out, it thereby may be ensured that grid-side converter exports within rated power.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of some embodiments of PV air-conditioner of the present invention.
Fig. 2 is the schematic diagram of other embodiments of PV air-conditioner of the present invention.
Fig. 3 is the schematic diagram of some embodiments of PV air-conditioner control method of the present invention.
Fig. 4 is the schematic diagram of other embodiments of PV air-conditioner control method of the present invention.
Fig. 5 is the schematic diagram of the other embodiment of PV air-conditioner control method of the present invention.
Fig. 6 is the schematic diagram of some embodiments of PV air-conditioner control device of the present invention.
Fig. 7 is the schematic diagram of other embodiments of PV air-conditioner control device of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality
Proportionate relationship draw.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 1 is the schematic diagram of some embodiments of PV air-conditioner of the present invention.As shown in Figure 1, the PV air-conditioner may include
Grid-side converter, generator-side converter wear and PV air-conditioner control device, in which:
The PV air-conditioner is used for opening DC bus as DC energy source for other DC loads.
In some embodiments of the invention, other described DC loads may include load 1- load 6, energy-storage battery etc.
DC equipment.
PV air-conditioner control device, for limiting the power output of grid-side converter in more DC load electricity consumptions.
In some embodiments of the invention, PV air-conditioner control device can be set in grid-side converter, PV air-conditioner
In controller or energy information control cabinet.
In some embodiments of the invention, PV air-conditioner control device, for setting the rated power of grid-side converter
Be set to and generator-side converter wear rated power it is consistent.It is possible thereby to guarantee design cost；Ensure in pure PV air-conditioner as negative
In the case where load, system margin will not be caused excessive and caused by system wastes.
In some embodiments of the invention, PV air-conditioner control device, it is negative for other direct currents to be added in PV air-conditioner
In the case where carrying application, electric power restriction is done by upper layer energy management system, no matter system application photovoltaic power generation, energy storage storage
Electricity need to all contribute in the actual motion of default grid-side converter and be not more than the rated power of PV air-conditioner.
In some embodiments of the invention, this strategy is incorporated in grid-side converter to be run.
In some embodiments of the invention, as shown in Figure 1, the upper layer energy management system can be G-IEMS (office
Domain energy internet system) interactive terminal.
It, can be by grid-side converter according to PV air-conditioner function itself based on the PV air-conditioner that the above embodiment of the present invention provides
Rate is adapted to, and without grid-side converter design capacity is excessive, under single PV air-conditioner, is configured optimal.
The above embodiment of the present invention can by power control, by grid-side converter in more DC load electricity consumptions,
Net side power output is limited, guarantees that grid-side converter exports within the rated power of PV air-conditioner.
Fig. 2 is the schematic diagram of other embodiments of PV air-conditioner of the present invention.As shown in Fig. 2, the PV air-conditioner can wrap
Include grid-side converter, generator-side converter wear and PV air-conditioner control device, in which:
The PV air-conditioner is used for opening DC bus as DC energy source for other DC loads.
In some embodiments of the invention, other described DC loads may include load 1- load 6, energy-storage battery etc.
DC equipment.
In some embodiments of the invention, as shown in Fig. 2, the grid-side converter can also include multiple net side unsteady flows
Device module.
PV air-conditioner control device can be used for the load power grade according to the open DC load of DC bus, be net side
The grid-side converter module of current transformer addition respective numbers.
The two or more modules of the grid-side converter of the above embodiment of the present invention point, the grid-side converter of PV air-conditioner can wait
Volume adaptation, according to the load power grade of DC bus open applications, adds the grid-side converter of respective numbers, so as to each direct current
Load can have net power in the case where reliability service.
In some embodiments of the present invention (such as Fig. 1 or Fig. 2 embodiment), the grid-side converter can also include can
Become charging circuit.
The above embodiment of the present invention can guarantee that the high current current limliting when starting overcurrent while can not promote start-up course
In load capacity.
In some embodiments of the invention, the on-off mode that the charge-variable circuit uses resistance value can be changed.
The linear mode that the above embodiment of the present invention will be charged by resistance changes into the variable on-off mode of resistance value, thus
It can guarantee that overcurrent and the ability with load trade off consideration.
In some embodiments of the invention, PV air-conditioner control device can be also used for starting rank in PV air-conditioner system
Section increases charging current limiter resistance；Charging current limiter resistance is adjusted according to charging situation.The above embodiment of the present invention current limliting electricity
Resistance does not continue to increase always, can also be adjusted according to charging situation.
In some embodiments of the invention, PV air-conditioner control device can be also used for starting rank in PV air-conditioner system
Section controls charge-variable circuit using the on-off mode of dispersion.
Thus the above embodiment of the present invention can guarantee that each device will not cause to damage because of lasting overcurrent in charge circuit
It is bad, so overcurrent protection can be opened or directly cancel overcurrent protection, guarantee the load capacity in circuit.
In some embodiments of the invention, as shown in Figure 1 or 2, the PV air-conditioner further includes being arranged in each direct current
The controllable switch (such as breaker in Fig. 1 or Fig. 2 embodiment) of the direct current supply inlet of load, in which:
PV air-conditioner control device is run for starting in PV air-conditioner system, after bypassing charging circuit, is controlled each straight
Current load incision.
The above embodiment of the present invention it is controllable can to add contactor etc. in the direct current supply inlet of each DC load equipment
Switch guarantees the starting operation of PV air-conditioner system, after bypassing charging circuit, cuts each DC load in transmitting order to lower levels.
In some embodiments of the invention, PV air-conditioner control device is run for starting in PV air-conditioner system, other
After charging circuit is fallen on road, controls each DC load and cut in batches.
Such as in Fig. 1 or Fig. 2 embodiment, 400VDC power bus and 48VVDC essential supplies bus is respectively set, in which:
Load 1-3 can be accessed on 400VDC power bus, and spare interface is to access other DC loads.
48VVDC essential supplies bus can access the DC loads such as load 4-6.
400VDC power can be realized by the on-off of control breaker and DC/DC converter in Fig. 1 or Fig. 2 embodiment
The access in batches of DC load on bus and 48VVDC essential supplies bus.
Each DC load of the above embodiment of the present invention can also be cut in batches, to guarantee the open DC bus of PV air-conditioner
The stabilization of voltage.
In some embodiments of the invention, PV air-conditioner control device can be also used for the bus electricity of each DC load
The starting voltage of pressure is set as PV air-conditioner voltage rating or slightly less than busbar voltage point, so that PV air-conditioner starting only considers directly
The capacitive load being added on stream bus, and do not have to consider the band of auxiliary electric power supply etc. and carry.Thus the above embodiment of the present invention can
Directly first to charge, when avoiding establishing busbar voltage, DC load starts power consumption, influences on charging.
The above embodiment of the present invention not only can be by power control, by grid-side converter in more DC load electricity consumption situations
Under, net side power output is limited, guarantees that grid-side converter exports within rated power.And the above embodiment of the present invention may be used also
In open DC bus, to add the DC load not limited, PV air-conditioner also can normally start operation.
According to another aspect of the present invention, a kind of PV air-conditioner is provided, may include net side unsteady flow as shown in Figure 1 or 2
Device, in which: PV air-conditioner is used for opening DC bus as DC energy source for other DC loads；The net side becomes
Flowing device includes charge-variable circuit.
The above embodiment of the present invention can also be improved only on the charging circuit of grid-side converter, it is possible thereby to solve
The technical issues of starting failure.The above embodiment of the present invention opens DC bus so that the PV air-conditioner of DC load, starting is added
Charging circuit can intelligent control, using busbar voltage as closed loop, guarantee start successfully.
Fig. 3 is the schematic diagram of some embodiments of PV air-conditioner control method of the present invention.Preferably, the present embodiment can be by this hair
Mingguang City's volt air conditioning control device or PV air-conditioner of the present invention execute execution.As shown in figure 3, the method may include:
Step 31, in more DC load electricity consumptions, the power output of the grid-side converter of PV air-conditioner is limited,
In, the PV air-conditioner is the PV air-conditioner as described in above-mentioned any embodiment (such as Fig. 1 or Fig. 2 embodiment).
In some embodiments of the invention, in step 31, the power of the grid-side converter of the limitation PV air-conditioner is defeated
Out the step of may include:
Step 311, by the rated power of grid-side converter be set as with and generator-side converter wear rated power it is consistent.
Step 312, become by the actual motion power output that upper layer energy management system controls grid-side converter no more than net side
Flow the rated power of device.
It, can be by grid-side converter according to photovoltaic sky based on the PV air-conditioner control method that the above embodiment of the present invention provides
It adjusts power itself to be adapted to, without grid-side converter design capacity is excessive, under single PV air-conditioner, configures optimal.
In some embodiments of the invention, in step 31, the power of the grid-side converter of the limitation PV air-conditioner is defeated
Out the step of may include: according to the load power grade of the open DC load of DC bus, accordingly for grid-side converter addition
The grid-side converter module of quantity.
The above embodiment of the present invention can by power control, by grid-side converter in more DC load electricity consumptions,
Net side power output is limited, guarantees that grid-side converter exports within the rated power of PV air-conditioner.
Fig. 4 is the schematic diagram of other embodiments of PV air-conditioner control method of the present invention.Preferably, the present embodiment can be by this
Invention PV air-conditioner control device or PV air-conditioner of the present invention execute execution.As shown in figure 4, the method may include:
Step 41, in more DC load electricity consumptions, the power output of the grid-side converter of PV air-conditioner is limited,
In, the PV air-conditioner is the PV air-conditioner as described in above-mentioned any embodiment (such as Fig. 1 or Fig. 2 embodiment).
Step 42, in PV air-conditioner system start-up phase, increase the charging current limiter of charge-variable circuit in grid-side converter
Resistance.
Step 43, the charging current limiter resistance is adjusted according to charging situation.
The above embodiment of the present invention can guarantee that the high current current limliting when starting overcurrent while can not promote start-up course
In load capacity.
The linear mode that the above embodiment of the present invention will be charged by resistance changes into the variable on-off mode of resistance value, thus
It can guarantee that overcurrent and the ability with load trade off consideration.
The above embodiment of the present invention current-limiting resistance does not continue to increase always, can also be adjusted according to charging situation.
In some embodiments of the invention, the PV air-conditioner control method can also include: in PV air-conditioner system
Startup stage controls charge-variable circuit using the on-off mode of dispersion.
Thus the above embodiment of the present invention can guarantee that each device will not cause to damage because of lasting overcurrent in charge circuit
It is bad, so overcurrent protection can be opened or directly cancel overcurrent protection, guarantee the load capacity in circuit.
In some embodiments of the invention, the PV air-conditioner control method can also include: in PV air-conditioner system
Starting operation, after bypassing charging circuit, controls each DC load and cuts in batches.
The above embodiment of the present invention it is controllable can to add contactor etc. in the direct current supply inlet of each DC load equipment
Switch guarantees the starting operation of PV air-conditioner system, after bypassing charging circuit, cuts each DC load in transmitting order to lower levels.This hair
Each DC load of bright above-described embodiment can also be cut in batches, to guarantee the stabilization of the open DC bus-bar voltage of PV air-conditioner.
In some embodiments of the invention, the PV air-conditioner control method can also include: by each DC load
The starting voltage of busbar voltage is set as PV air-conditioner voltage rating.
The above embodiment of the present invention not only can be by power control, by grid-side converter in more DC load electricity consumption situations
Under, net side power output is limited, guarantees that grid-side converter exports within rated power；And the above embodiment of the present invention may be used also
In open DC bus, to add the DC load not limited, PV air-conditioner also can normally start operation.
Fig. 5 is the schematic diagram of the other embodiment of PV air-conditioner control method of the present invention.Preferably, the present embodiment can be by this
Invention PV air-conditioner control device or PV air-conditioner of the present invention execute execution.As shown in figure 5, the method may include:
Step 51, in PV air-conditioner system start-up phase, increase the charging current limiter of charge-variable circuit in grid-side converter
Resistance, wherein the PV air-conditioner is the PV air-conditioner as described in above-mentioned any embodiment (such as Fig. 1 or Fig. 2 embodiment).
Step 52, the charging current limiter resistance is adjusted according to charging situation.
The above embodiment of the present invention can also be improved only on the charging circuit of grid-side converter, it is possible thereby to solve
The technical issues of starting failure.The above embodiment of the present invention opens DC bus so that the PV air-conditioner of DC load, starting is added
Charging circuit can intelligent control, using busbar voltage as closed loop, guarantee start successfully.
Fig. 6 is the schematic diagram of some embodiments of PV air-conditioner control device of the present invention.As shown in fig. 6, above-mentioned of the present invention
PV air-conditioner control device described in one embodiment (such as Fig. 1 or Fig. 2 embodiment) may include power limiting unit 61 and fill
At least one of in electric circuit control unit 62, in which:
Power limiting unit 61, for limiting the grid-side converter of PV air-conditioner in more DC load electricity consumptions
Power output, wherein the PV air-conditioner is that the photovoltaic as described in above-mentioned any embodiment (such as Fig. 1 or Fig. 2 embodiment) is empty
It adjusts.
Charging circuit control unit 62, in PV air-conditioner system start-up phase, increasing, which can be changed in grid-side converter, to fill
The charging current limiter resistance of circuit；The charging current limiter resistance is adjusted according to charging situation.
In some embodiments of the invention, the PV air-conditioner control device realizes such as any of the above-described implementation for executing
The operation of PV air-conditioner control method described in example (such as Fig. 3-Fig. 5 any embodiment).
It, not only can be by power control, by net based on the PV air-conditioner control device that the above embodiment of the present invention provides
Side current transformer limits net side power output in more DC load electricity consumptions, guarantees grid-side converter within rated power
Output；And the above embodiment of the present invention can also add the DC load not limited, photovoltaic in open DC bus
Air-conditioning also can normally start operation.
Fig. 7 is the schematic diagram of other embodiments of PV air-conditioner control device of the present invention.As shown in fig. 7, the present invention is above-mentioned
PV air-conditioner control device described in any embodiment (such as Fig. 1 or Fig. 2 embodiment) may include memory 71 and processor
72, in which:
Memory 71, for storing instruction；
Processor 72, for executing described instruction, so that the battery charge controller, which executes, realizes such as any of the above-described implementation
The operation of PV air-conditioner control method described in example (such as Fig. 3-Fig. 5 any embodiment).
The above embodiment of the present invention can be using the limit power control or the G-IEMS energy of the grid-side converter of PV air-conditioner
The energy power output strategy of management system, thus the above embodiment of the present invention can be by grid-side converter according to PV air-conditioner function itself
Rate adaptation under single PV air-conditioner, configures optimal without grid-side converter design capacity is excessive.
The open DC bus of the above embodiment of the present invention is to be added the PV air-conditioner of DC load, and charging circuit can when starting
Intelligent control, using busbar voltage as closed loop, guarantee starts successfully the above embodiment of the present invention.Thus the above embodiment of the present invention exists
In the case of open DC bus, add the DC load not limited, PV air-conditioner also can normally start operation.
Fig. 1 and Fig. 2 embodiment gives the schematic diagram of DC grid of the present invention.As depicted in figs. 1 and 2, the present invention is straight
Galvanic electricity net may include the PV air-conditioner as described in above-mentioned any embodiment, can also include energy-storage battery, DC load 1-6 and
The interactive terminal G-IEMS.
Based on the DC grid that the above embodiment of the present invention provides, PV air-conditioner uses the limit power control of grid-side converter
The energy of system or G-IEMS energy management system power output strategy, thus the above embodiment of the present invention can be by grid-side converter root
According to PV air-conditioner power adaptation itself, without grid-side converter design capacity is excessive, under single PV air-conditioner, configuration is most
It is excellent.
The open DC bus of the above embodiment of the present invention is to be added the PV air-conditioner of DC load, and charging circuit can when starting
Intelligent control, using busbar voltage as closed loop, guarantee starts successfully the above embodiment of the present invention.Thus the above embodiment of the present invention exists
In the case of open DC bus, add the DC load not limited, PV air-conditioner also can normally start operation.
The PV air-conditioner of the above embodiment of the present invention can open DC bus as DC energy source, directly for other
Flow device uses.The PV air-conditioner of the above embodiment of the present invention can be used for direct-current grid or direct current for direct currents such as electricity consumption ports
Power grid occasion.
According to another aspect of the present invention, a kind of computer readable storage medium, the computer-readable storage medium are provided
Matter is stored with computer instruction, is realized when described instruction is executed by processor as (such as Fig. 3-Fig. 5 is any for above-mentioned any embodiment
Embodiment) described in PV air-conditioner control method operation.
Based on the computer readable storage medium that the above embodiment of the present invention provides, using the grid-side converter of PV air-conditioner
Limit power control or G-IEMS energy management system the energy contribute strategy, thus the above embodiment of the present invention can be by net
Side current transformer is according to PV air-conditioner power adaptation itself, without grid-side converter design capacity is excessive, in single PV air-conditioner
Under, it configures optimal.
The open DC bus of the above embodiment of the present invention is to be added the PV air-conditioner of DC load, and charging circuit can when starting
Intelligent control, using busbar voltage as closed loop, guarantee starts successfully the above embodiment of the present invention.Thus the above embodiment of the present invention exists
In the case of open DC bus, add the DC load not limited, PV air-conditioner also can normally start operation.
PV air-conditioner control device described above can be implemented as executing the logical of function described herein
It can with processor, programmable logic controller (PLC) (PLC), digital signal processor (DSP), specific integrated circuit (ASIC), scene
Program gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components
Or it is any appropriately combined.
So far, the present invention is described in detail.In order to avoid covering design of the invention, it is public that this field institute is not described
The some details known.Those skilled in the art as described above, completely it can be appreciated how implementing technology disclosed herein
Scheme.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Description of the invention is given for the purpose of illustration and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage
The solution present invention is to design various embodiments suitable for specific applications with various modifications.
Claims (26)
1. a kind of PV air-conditioner, which is characterized in that including grid-side converter and PV air-conditioner control device, in which:
PV air-conditioner is used for opening DC bus as DC energy source for other DC loads；
PV air-conditioner control device, for limiting the power output of grid-side converter in more DC load electricity consumptions.
2. PV air-conditioner according to claim 1, which is characterized in that
PV air-conditioner control device, for by the rated power of grid-side converter be set as with and generator-side converter wear rated power
Unanimously.
3. PV air-conditioner according to claim 2, which is characterized in that
PV air-conditioner control device, the actual motion power output for controlling grid-side converter by energy management system are not more than net
The rated power of side current transformer.
4. PV air-conditioner according to claim 1, which is characterized in that
The grid-side converter includes multiple grid-side converter modules；
PV air-conditioner control device is grid-side converter for the load power grade according to the open DC load of DC bus
Add the grid-side converter module of respective numbers.
5. PV air-conditioner described in any one of -4 according to claim 1, which is characterized in that the grid-side converter includes variable
Charging circuit.
6. PV air-conditioner according to claim 5, which is characterized in that the charge-variable circuit is opened using what resistance value can be changed
Pass mode.
7. PV air-conditioner according to claim 6, which is characterized in that
PV air-conditioner control device, for increasing charging current limiter resistance in PV air-conditioner system start-up phase；According to charging situation
Charging current limiter resistance is adjusted.
8. PV air-conditioner according to claim 5, which is characterized in that
PV air-conditioner control device, for being filled using the on-off mode control of dispersion is variable in PV air-conditioner system start-up phase
Circuit.
9. PV air-conditioner according to claim 5, which is characterized in that further include the direct current supply that each DC load is arranged in
The controllable switch of inlet, in which:
PV air-conditioner control device is run for starting in PV air-conditioner system, and after bypassing charging circuit, it is negative to control each direct current
Carry incision.
10. PV air-conditioner according to claim 9, which is characterized in that
PV air-conditioner control device is run for starting in PV air-conditioner system, and after bypassing charging circuit, it is negative to control each direct current
Load is cut in batches.
11. PV air-conditioner according to claim 5, which is characterized in that
PV air-conditioner control device, for setting the specified electricity of PV air-conditioner for the starting voltage of the busbar voltage of each DC load
Pressure.
12. a kind of PV air-conditioner, which is characterized in that including grid-side converter, in which:
PV air-conditioner is used for opening DC bus as DC energy source for other DC loads；
The grid-side converter includes charge-variable circuit.
13. a kind of PV air-conditioner control method characterized by comprising
In more DC load electricity consumptions, the power output of the grid-side converter of PV air-conditioner is limited, wherein the photovoltaic is empty
It is adjusted to PV air-conditioner of any of claims 1-12.
14. PV air-conditioner control method according to claim 13, which is characterized in that the net side of the limitation PV air-conditioner
The power output of current transformer includes:
By the rated power of grid-side converter be set as with and generator-side converter wear rated power it is consistent；
It is not more than the specified function of grid-side converter by the actual motion power output that upper layer energy management system controls grid-side converter
Rate.
15. PV air-conditioner control method according to claim 13, which is characterized in that the net side of the limitation PV air-conditioner
The power output of current transformer includes:
According to the load power grade of the open DC load of DC bus, the net side unsteady flow of respective numbers is added for grid-side converter
Device module.
16. PV air-conditioner control method described in any one of 3-15 according to claim 1, which is characterized in that further include:
In PV air-conditioner system start-up phase, increase the charging current limiter resistance of charge-variable circuit in grid-side converter；
The charging current limiter resistance is adjusted according to charging situation.
17. PV air-conditioner control method according to claim 16, which is characterized in that further include:
In PV air-conditioner system start-up phase, charge-variable circuit is controlled using the on-off mode of dispersion.
18. PV air-conditioner control method according to claim 16, which is characterized in that further include:
Start in PV air-conditioner system and run, after bypassing charging circuit, controls each DC load and cut in batches.
19. PV air-conditioner control method according to claim 16, which is characterized in that further include:
PV air-conditioner voltage rating is set by the starting voltage of the busbar voltage of each DC load.
20. a kind of PV air-conditioner control method characterized by comprising
In PV air-conditioner system start-up phase, increase the charging current limiter resistance of charge-variable circuit in grid-side converter, wherein institute
Stating PV air-conditioner is PV air-conditioner of any of claims 1-12；
The charging current limiter resistance is adjusted according to charging situation.
21. a kind of PV air-conditioner control device characterized by comprising
Power limiting unit, in more DC load electricity consumptions, the power for limiting the grid-side converter of PV air-conditioner to be defeated
Out, wherein the PV air-conditioner is PV air-conditioner of any of claims 1-12.
22. PV air-conditioner control device according to claim 21, which is characterized in that the PV air-conditioner control device is used
In the operation for executing PV air-conditioner control method of the realization as described in any one of claim 13-20.
23. the PV air-conditioner control device according to claim 21 or 22, which is characterized in that the PV air-conditioner control dress
It is set to the PV air-conditioner control device such as PV air-conditioner of any of claims 1-12.
24. a kind of PV air-conditioner control device characterized by comprising
Memory, for storing instruction；
Processor is realized so that the battery charge controller executes as any in claim 13-20 for executing described instruction
The operation of PV air-conditioner control method described in.
25. a kind of DC grid, which is characterized in that including PV air-conditioner such as of any of claims 1-12.
26. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the PV air-conditioner control method as described in any one of claim 13-20 is realized when described instruction is executed by processor
Operation.
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