CN114576796A - Method and device for controlling air conditioning system, air conditioning system and storage medium - Google Patents
Method and device for controlling air conditioning system, air conditioning system and storage medium Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004146 energy storage Methods 0.000 claims abstract description 114
- 230000005611 electricity Effects 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 12
- 238000010248 power generation Methods 0.000 description 10
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- 230000006870 function Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 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
- F24F11/46—Improving electric energy efficiency or saving
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- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
- F24F11/88—Electrical aspects, e.g. circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for controlling an air conditioning system, wherein the air conditioning system comprises a direct-current bus, a wind power system, a photovoltaic system, an energy storage system and an air conditioner, the wind power system, the photovoltaic system, the energy storage system and the air conditioner are connected to the direct-current bus, a power grid is connected to the direct-current bus through a rectifier, and the method comprises the following steps: detecting the voltage of a direct current bus; detecting the current capacity of the energy storage system; detecting the power supply state of a power grid; and adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state. The power supply power is equal to the power consumption power of the air conditioner by adjusting the generating power and the operation mode of the energy storage system, so that the cyclic utilization of electric energy is promoted in the wind-solar-energy-storage multi-energy-source power supply air conditioner system. The application also discloses a device for controlling the air conditioning system, the air conditioning system and a storage medium.
Description
Technical Field
The present application relates to the field of intelligent home appliance technologies, and for example, to a method and an apparatus for controlling an air conditioning system, and a storage medium.
Background
At present, with the rapid development of new energy technology, more and more air conditioners adopt a multi-energy power supply system of a wind power system, a photovoltaic system, an energy storage system and a power grid, and all subsystems need to be coordinated to ensure the stable power supply of the air conditioners.
The control method of the wind-solar-storage integrated air conditioning system based on the common direct current bus in the related art comprises the following steps: collecting electric information of a direct current bus, an alternating current power grid, a solar photovoltaic cell panel and a wind driven generator; detecting whether the alternating current power grid is normal, if so, selecting the alternating current power grid to be connected to a direct current bus; if not, selecting a wind driven generator or a solar photovoltaic cell panel to be connected with a direct current bus; detecting whether the direct current bus is normal, and if so, connecting the solar photovoltaic cell panel, the wind driven generator and the air conditioning system into the bus; or the solar photovoltaic cell panel or the wind driven generator and the air conditioning system are connected to the direct current bus; and if the voltage of the direct current bus is overhigh, the unloading system is connected into the direct current bus to maintain the voltage of the direct current bus to be in a normal range, the equipment where the fault is located is judged, and the equipment where the fault is located is cut off.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the technology is used for configuring a photovoltaic system, a wind power system and an alternating current power grid according to electric information so as to adjust the voltage of a direct current bus and realize stable power supply of an air conditioner. However, when the dc bus voltage is adjusted by the unloading system, the electric energy is wasted, which is not favorable for recycling the electric energy.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling an air conditioning system, the air conditioning system and a storage medium, so as to promote the cyclic utilization of electric energy in a wind-solar-storage multi-energy-source power supply air conditioning system.
In some embodiments, the air conditioning system comprises a dc bus, and a wind power system, a photovoltaic system, an energy storage system, and an air conditioner connected to the dc bus, the grid being connected to the dc bus via a rectifier, the method comprising: detecting the voltage of a direct current bus; detecting the current capacity of the energy storage system; detecting the power supply state of a power grid; and adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state.
Optionally, adjusting the generated power of the wind power system and the photovoltaic system and the operation mode of the energy storage system includes: determining the magnitude relation between the direct current bus voltage and a preset voltage; under the condition that the voltage of the direct current bus is greater than the preset voltage, adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the current capacity; under the condition that the voltage of the direct current bus is smaller than the preset voltage, adjusting the operation mode of the energy storage system according to the current capacity and the power supply state; and under the condition that the direct current bus voltage is equal to the preset voltage, controlling the operation mode of the energy storage system to be unchanged.
Optionally, adjusting the generated power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the current capacity includes: determining the size relationship between the current capacity and the maximum capacity; under the condition that the current capacity is smaller than the maximum capacity, controlling an energy storage system to store energy; and under the condition that the current capacity is equal to the maximum capacity, controlling the energy storage system to stop running, and reducing the generated power to enable the voltage of the direct-current bus to be equal to the preset voltage.
Optionally, adjusting the operation mode of the energy storage system according to the current capacity and the power supply state includes: judging whether the power grid supplies power normally; under the condition that the power grid normally supplies power, judging whether the current capacity is larger than a first preset capacity or not; under the condition that the current capacity is larger than the first preset capacity, controlling an energy storage system to generate power to enable the voltage of a direct current bus to be equal to the preset voltage; and under the condition that the current capacity is smaller than or equal to the first preset capacity, controlling the energy storage system to stop running and controlling the power supply of the power grid to supplement the power difference, so that the voltage of the direct-current bus is equal to the preset voltage.
Optionally, after determining whether the power grid supplies power normally, the method further includes: under the condition of power failure of the power grid, judging whether the current capacity is larger than a second preset capacity or not; under the condition that the current capacity is larger than a second preset capacity, controlling the energy storage system to generate electricity; and under the condition that the current capacity is smaller than or equal to the second preset capacity, controlling the energy storage system to stop running and controlling the air conditioner to stop running.
Optionally, before detecting the dc bus voltage, the method further includes: and under the condition of receiving an air conditioner starting instruction, controlling the wind power system and the photovoltaic system to operate.
Optionally, controlling the operation of the wind power system and the photovoltaic system comprises: controlling the wind power system to operate at the maximum power; controlling the photovoltaic system to operate at maximum power.
In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform the above-described method for controlling an air conditioning system.
In some embodiments, the air conditioning system comprises: a direct current bus; the wind power system is connected with the direct current bus; the photovoltaic system is connected to the direct current bus; the energy storage system is connected to the direct current bus; the input side of the rectifier is connected with a power grid, and the output side of the rectifier is connected with a direct current bus; the air conditioner is connected to the direct current bus; and, the above-mentioned apparatus for controlling an air conditioning system.
In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for controlling an air conditioning system.
The method and the device for controlling the air conditioning system, the air conditioning system and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
in the wind-solar-energy-storage multi-energy-source power supply air-conditioning system, the direct-current bus voltage is detected to determine whether the power supply power reaches the expectation. The current capacity of the energy storage system is detected to determine whether the energy storage system can supply power or consume power as a load. And detecting the power supply state of the power grid so as to supplement the power difference through the power grid or the energy storage system. And adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state so as to change the power supply power. The power supply power is equal to the power consumption power of the air conditioner by adjusting the generating power and the operation mode of the energy storage system, so that the cyclic utilization of electric energy is promoted in the wind-solar-energy-storage multi-energy-source power supply air conditioner system.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a method for controlling an air conditioning system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;
fig. 7 is a schematic diagram of an apparatus for controlling an air conditioning system according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
Referring to fig. 1, the air conditioning system includes a dc bus, a wind power system, a photovoltaic system, an energy storage system, a rectifier, and an air conditioner. The wind power system is connected to the direct current bus and used for supplying power to the air conditioner. The photovoltaic system is connected to the direct current bus and used for supplying power to the air conditioner. The energy storage system is connected to the direct current bus, and can be operated in a power generation mode to supply power to the air conditioner and can also be operated in an energy storage mode to absorb electric energy. The input side of the rectifier is connected with a power grid, the output side of the rectifier is connected with a direct current bus, and the power grid supplies power to the air conditioner after rectification. The air conditioner is connected to the direct current bus.
Referring to fig. 2, an embodiment of the present disclosure provides a method for controlling an air conditioning system, including:
and S210, detecting the direct current bus voltage by the air conditioning system.
And S220, detecting the current capacity of the energy storage system by the air conditioning system.
And S230, detecting the power supply state of the power grid by the air conditioning system.
And S240, the air conditioning system adjusts the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state.
By adopting the method for controlling the air conditioning system, the DC bus voltage is detected in the wind-solar-energy-storage multi-energy-source power supply air conditioning system to determine whether the power supply power reaches the expectation. The current capacity of the energy storage system is detected to determine whether the energy storage system can supply power or consume power as a load. And detecting the power supply state of the power grid so as to supplement the power difference through the power grid or the energy storage system. And adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state so as to change the power supply power. The power supply power is equal to the power consumption power of the air conditioner by adjusting the generating power and the operation mode of the energy storage system, so that the cyclic utilization of electric energy is promoted in the wind-solar-energy-storage multi-energy-source power supply air conditioner system.
Referring to fig. 3, another method for controlling an air conditioning system according to an embodiment of the present disclosure includes:
and S210, detecting the direct current bus voltage by the air conditioning system.
And S220, detecting the current capacity of the energy storage system by the air conditioning system.
And S230, detecting the power supply state of the power grid by the air conditioning system.
And S250, the air conditioning system determines the magnitude relation between the direct current bus voltage and the preset voltage.
And S260, under the condition that the voltage of the direct current bus is greater than the preset voltage, the air conditioning system adjusts the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the current capacity.
And S270, under the condition that the voltage of the direct current bus is smaller than the preset voltage, the air conditioning system adjusts the operation mode of the energy storage system according to the current capacity and the power supply state.
And S280, under the condition that the voltage of the direct current bus is equal to the preset voltage, the air conditioning system controls the operation mode of the energy storage system to be unchanged.
By adopting the method for controlling the air conditioning system, whether the generated power of the wind power system and the photovoltaic system is equal to the power consumption power of the air conditioner is determined according to the voltage of the direct current bus. When the direct current bus voltage is larger than the preset voltage, the power generation power of the wind power system and the photovoltaic system is large, and the power generation power and the operation mode of the energy storage system need to be adjusted to reduce the direct current bus voltage. When the voltage of the direct current bus is smaller than the preset voltage, the power generation power of the wind power system and the photovoltaic system is insufficient, and power needs to be supplemented through the energy storage system. Under the condition that the voltage of the direct current bus is equal to the preset voltage, the sum of the generated power of the wind power system and the photovoltaic system and the power provided/consumed by the energy storage system is equal to the power consumption power of the air conditioner, and the energy storage system does not need to be adjusted. The power generation power and the operation mode of the energy storage system are adjusted under different direct current bus voltages, so that the power supply power is equal to the power consumption power, and the cyclic utilization of the electric energy is promoted.
Because the power supply power and the power consumption power are difficult to determine, the power magnitude relation is indirectly determined through the magnitude relation between the direct current bus voltage and the preset voltage. When the power supply power is larger than the power consumption power, the voltage of the direct current bus is raised, so that the voltage of the direct current bus is larger than the preset voltage. When the power supply power is less than the power consumption power, the voltage of the direct current bus is pulled down, so that the voltage of the direct current bus is less than the preset voltage. When the power supply power is equal to the power consumption power, the voltage of the direct current bus is equal to the preset voltage. When the power supply power and the power consumption power are changed and equal, the change of the direct current bus voltage is small, so that the preset voltage is set to be a fixed value.
With reference to fig. 4, another method for controlling an air conditioning system according to an embodiment of the present disclosure includes:
and S210, detecting the direct current bus voltage by the air conditioning system.
And S220, detecting the current capacity of the energy storage system by the air conditioning system.
And S230, detecting the power supply state of the power grid by the air conditioning system.
And S250, the air conditioning system determines the magnitude relation between the direct current bus voltage and the preset voltage.
And S261, determining the size relation between the current capacity and the maximum capacity by the air conditioning system under the condition that the voltage of the direct-current bus is larger than the preset voltage.
And S262, controlling the energy storage system to store energy by the air conditioning system under the condition that the current capacity is smaller than the maximum capacity.
And S263, controlling the energy storage system to stop running by the air conditioning system and reducing the generated power to enable the voltage of the direct current bus to be equal to the preset voltage under the condition that the current capacity is equal to the maximum capacity.
And S270, under the condition that the voltage of the direct current bus is smaller than the preset voltage, the air conditioning system adjusts the operation mode of the energy storage system according to the current capacity and the power supply state.
And S280, under the condition that the voltage of the direct current bus is equal to the preset voltage, the air conditioning system controls the operation mode of the energy storage system to be unchanged.
By adopting the method for controlling the air conditioning system provided by the embodiment of the disclosure, when the power generation power of the wind power system and the photovoltaic system is large, a power difference exists between the power generation power and the power consumption power, and the power is consumed through a load so as to enable the air conditioner to stably operate. When the current capacity of the energy storage system is smaller than the maximum capacity, the energy storage system is used as a load consuming power, and additionally generated electric energy is stored in the energy storage system. When the energy storage system is required to generate electricity, the part of the electric energy can be reused to promote the recycling of the electric energy. When the current capacity of the energy storage system has reached the maximum capacity, continued charging of the energy storage system may result in damage to the energy storage system. And controlling the energy storage system to stop running at the moment, and reducing the generated power to enable the direct current bus voltage to be equal to the preset voltage so as to improve the stability of the air conditioner power supply.
Referring to fig. 5, another method for controlling an air conditioning system according to an embodiment of the present disclosure includes:
and S210, detecting the direct current bus voltage by the air conditioning system.
And S220, detecting the current capacity of the energy storage system by the air conditioning system.
And S230, detecting the power supply state of the power grid by the air conditioning system.
And S250, the air conditioning system determines the magnitude relation between the direct current bus voltage and the preset voltage.
And S260, under the condition that the voltage of the direct current bus is greater than the preset voltage, the air conditioning system adjusts the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the current capacity.
And S271, under the condition that the voltage of the direct current bus is less than the preset voltage, judging whether the power grid supplies power normally by the air conditioning system. If yes, go to step S272. If not, go to step S275.
S272, the air conditioning system determines whether the current capacity is greater than a first preset capacity. If yes, go to step S273. If not, go to step S274.
And S273, controlling the energy storage system to generate power by the air conditioning system so that the voltage of the direct current bus is equal to the preset voltage.
And S274, the air conditioning system controls the energy storage system to stop running and controls the power supply of the power grid to supplement the power difference, so that the voltage of the direct current bus is equal to the preset voltage.
And S275, judging whether the current capacity is larger than a second preset capacity by the air conditioning system. If yes, go to step S276. If not, go to step S277.
And S276, controlling the energy storage system to generate power by the air conditioning system.
And S277, controlling the energy storage system to stop running and controlling the air conditioner to stop running by the air conditioning system.
And S280, under the condition that the voltage of the direct current bus is equal to the preset voltage, the air conditioning system controls the operation mode of the energy storage system to be unchanged.
By adopting the method for controlling the air conditioning system provided by the embodiment of the disclosure, when the generated power of the wind power system and the photovoltaic system is small, a negative power difference exists between the generated power and the consumed power, and the power difference needs to be eliminated through the power supply of the energy storage system or the power grid so as to enable the air conditioner to stably operate. When the power grid normally supplies power, the energy storage system is preferentially considered to be used for generating power. The stored generated electric energy of the wind power system and the photovoltaic system is reused to promote the cyclic utilization of the electric energy. When the current capacity of the energy storage system is lower than the first preset capacity, the residual capacity is low due to the fact that power generation is continuously carried out through the energy storage system, and the emergency function cannot be achieved when the power grid is powered off. And at the moment, the energy storage system is controlled to stop running, and the power difference is eliminated only by supplying power to the power grid, so that the energy storage system plays an emergency role when the power grid is powered off. When the power grid is cut off, the power difference can be eliminated only by generating power through the energy storage system. When the current capacity of the energy storage system is lower than the second preset capacity, the loss of the service life of the energy storage system can be accelerated by continuing to generate electricity through the energy storage system, and the air conditioner can also be damaged when running under the condition that the power supply is unstable. And at the moment, the energy storage system is controlled to stop running, and the air conditioner is controlled to stop, so that the energy storage system and the air conditioner are prevented from being damaged.
The first preset capacity is the emergency capacity of the energy storage system and is used for generating power through the energy storage system when the power grid is powered off. The value range of the first preset capacity is [40, 60] percent of the maximum capacity, and preferably, the value of the first preset capacity is 45%, 50% or 55%.
The second preset capacity is a lower limit capacity of the energy storage system. When the current capacity of the energy storage system is lower than the second preset capacity, the reduction of the service life of the energy storage system can be accelerated by continuing to generate power through the energy storage system. The value range of the second preset capacity is [5, 15] percent of the maximum capacity, and preferably, the value of the second preset capacity is 8 percent, 10 percent or 12 percent.
Optionally, the step S273 of controlling the energy storage system to generate power by the air conditioning system to make the dc bus voltage equal to the preset voltage includes: the air conditioning system controls the energy storage system to generate electricity at the maximum power. The air conditioning system again detects the dc bus voltage. And the air conditioning system determines the relationship between the direct current bus voltage and the preset voltage again. And under the condition that the voltage of the direct current bus is greater than the preset voltage, the air conditioning system reduces the power generation power of the energy storage system, so that the voltage of the direct current bus is equal to the preset voltage. And under the condition that the voltage of the direct current bus is less than the preset voltage, the air conditioning system controls the power supply of the power grid to supplement the power difference, so that the voltage of the direct current bus is equal to the preset voltage. And under the condition that the voltage of the direct current bus is equal to the preset voltage, the air conditioning system keeps the generated power of the energy storage system unchanged. Thus, when the energy storage system is used for generating electricity, the generated power of the wind and light storage system may not be equal to the power consumption power of the air conditioner. At this time, the dc bus voltage is detected again. When the generated power is high, the generated power of the energy storage system is reduced to enable the direct current bus voltage to be equal to the preset voltage, so that wind energy and solar energy are utilized as much as possible. When the generated power is low, the power difference is eliminated through the power supply of the power grid, so that the stability of the power supply of the air conditioner is improved.
Referring to fig. 6, another method for controlling an air conditioning system according to an embodiment of the present disclosure includes:
and S200, controlling the wind power system and the photovoltaic system to operate by the air conditioning system under the condition of receiving an air conditioning starting instruction.
And S210, detecting the direct current bus voltage by the air conditioning system.
And S220, detecting the current capacity of the energy storage system by the air conditioning system.
And S230, detecting the power supply state of the power grid by the air conditioning system.
And S240, the air conditioning system adjusts the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state.
By adopting the method for controlling the air conditioning system, after the air conditioner is started, power is preferentially supplied through the wind power system and the photovoltaic system. Because wind energy and light energy belong to renewable energy sources, power is not supplied through a power grid and an energy storage system under the condition of sufficient power supply power, so that the purpose of saving energy is achieved.
Optionally, the air conditioning system in step S200 controls the operation of the wind power system and the photovoltaic system, including: the air conditioning system controls the photovoltaic system to operate at maximum power. The air conditioning system controls the wind power system to operate at maximum power. Therefore, whether the power generation power of the current wind power system and the current photovoltaic system meets the power consumption requirement of the air conditioner or not can be determined quickly at the beginning, and the starting time of the air conditioner is shortened.
Optionally, the air conditioning system in step S200 controls the operation of the wind power system and the photovoltaic system, including: the air conditioning system controls the wind power system to operate at maximum power. The air conditioning system detects the dc bus voltage. And under the condition that the voltage of the direct current bus is less than the preset voltage, the air conditioning system controls the photovoltaic system to operate at the maximum power. Therefore, when the generated power of the wind power system is enough to supply power to the air conditioner, the power supply source is reduced to reduce the interference of power supply, and the stability of power supply of the air conditioner is improved.
Optionally, the air conditioning system in step S200 controls the operation of the wind power system and the photovoltaic system, and includes: the air conditioning system controls the photovoltaic system to operate at maximum power. The air conditioning system detects the dc bus voltage. And under the condition that the voltage of the direct current bus is smaller than the preset voltage, the air conditioning system controls the wind power system to operate at the maximum power. Therefore, when the generated power of the photovoltaic system is enough to supply power to the air conditioner, the power supply source is reduced to reduce the interference of power supply and improve the stability of the power supply of the air conditioner.
As shown in fig. 7, an embodiment of the present disclosure provides an apparatus for controlling an air conditioning system, which includes a processor (processor)41 and a memory (memory) 42. Optionally, the apparatus may further include a Communication Interface (Communication Interface)43 and a bus 44. The processor 41, the communication interface 43, and the memory 42 may communicate with each other via a bus 44. The communication interface 43 may be used for information transfer. The processor 41 may call logic instructions in the memory 42 to perform the method for controlling the air conditioning system of the above-described embodiment.
Furthermore, the logic instructions in the memory 42 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 42 is a storage medium and can be used for storing software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 41 executes functional applications and data processing, i.e., implements the method for controlling the air conditioning system in the above-described embodiment, by executing program instructions/modules stored in the memory 42.
The memory 42 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 42 may include a high speed random access memory and may also include a non-volatile memory.
The embodiment of the disclosure provides an air conditioning system, which comprises the device for controlling the air conditioning system.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling an air conditioning system.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling an air conditioning system, the air conditioning system comprising a dc bus and a wind power system, a photovoltaic system, an energy storage system and an air conditioner connected to the dc bus, a power grid being connected to the dc bus via a rectifier, the method comprising:
detecting the voltage of a direct current bus;
detecting the current capacity of the energy storage system;
detecting the power supply state of a power grid;
and adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the voltage of the direct current bus, the current capacity and the power supply state.
2. The method of claim 1, wherein adjusting the operating mode of the generated power and the energy storage system of the wind power system and the photovoltaic system comprises:
determining the magnitude relation between the direct current bus voltage and a preset voltage;
under the condition that the voltage of the direct current bus is greater than the preset voltage, adjusting the generating power of the wind power system and the photovoltaic system and the operation mode of the energy storage system according to the current capacity;
under the condition that the voltage of the direct current bus is smaller than the preset voltage, adjusting the operation mode of the energy storage system according to the current capacity and the power supply state;
and under the condition that the direct current bus voltage is equal to the preset voltage, controlling the operation mode of the energy storage system to be unchanged.
3. The method of claim 2, wherein adjusting the operating modes of the generated power of the wind power system and the photovoltaic system and the energy storage system based on the current capacity comprises:
determining the size relation between the current capacity and the maximum capacity;
under the condition that the current capacity is smaller than the maximum capacity, controlling an energy storage system to store energy;
and under the condition that the current capacity is equal to the maximum capacity, controlling the energy storage system to stop running, and reducing the generated power to enable the voltage of the direct-current bus to be equal to the preset voltage.
4. The method of claim 2, wherein adjusting the operating mode of the energy storage system based on the current capacity and the power state comprises:
judging whether the power grid supplies power normally;
under the condition that the power grid normally supplies power, judging whether the current capacity is larger than a first preset capacity or not;
under the condition that the current capacity is larger than the first preset capacity, controlling an energy storage system to generate power to enable the voltage of a direct current bus to be equal to the preset voltage;
and under the condition that the current capacity is smaller than or equal to the first preset capacity, controlling the energy storage system to stop running and controlling the power supply of the power grid to supplement the power difference so as to enable the direct-current bus voltage to be equal to the preset voltage.
5. The method of claim 4, after determining whether the power grid is normally powered, further comprising:
under the condition of power failure of the power grid, judging whether the current capacity is larger than a second preset capacity or not;
under the condition that the current capacity is larger than a second preset capacity, controlling the energy storage system to generate electricity;
and under the condition that the current capacity is smaller than or equal to the second preset capacity, controlling the energy storage system to stop running and controlling the air conditioner to stop running.
6. The method according to any one of claims 1 to 5, further comprising, prior to detecting the DC bus voltage:
and under the condition of receiving an air conditioner starting instruction, controlling the wind power system and the photovoltaic system to operate.
7. The method of claim 6, wherein controlling operation of the wind and photovoltaic systems comprises:
controlling the wind power system to operate at the maximum power;
controlling the photovoltaic system to operate at maximum power.
8. An apparatus for controlling an air conditioning system, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for controlling an air conditioning system according to any one of claims 1 to 7 when executing the program instructions.
9. An air conditioning system, comprising:
a direct current bus;
the wind power system is connected to the direct current bus;
the photovoltaic system is connected to the direct current bus;
the energy storage system is connected to the direct current bus;
the input side of the rectifier is connected with a power grid, and the output side of the rectifier is connected with a direct current bus;
the air conditioner is connected to the direct current bus; and the combination of (a) and (b),
the apparatus for controlling an air conditioning system as claimed in claim 8.
10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform a method for controlling an air conditioning system according to any one of claims 1 to 7.
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