CN114285142A - Photovoltaic energy storage circuit and control method thereof, as well as photovoltaic air conditioning system and photovoltaic air conditioning - Google Patents
Photovoltaic energy storage circuit and control method thereof, as well as photovoltaic air conditioning system and photovoltaic air conditioning Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 45
- 238000004378 air conditioning Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 238000005070 sampling Methods 0.000 claims description 20
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
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- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
本发明公开了一种光伏储能电路、光伏空调系统及光伏空调，属于光伏储能领域。光伏储能电路中光伏电池的正输出端连接第一MOS管源极，第一MOS管的漏极连接转换控制模块的正输入端，光伏电池的负输出端连接第二MOS管的漏极，第二MOS管的源极连接转换控制模块的负输入端，第一MOS管和第二MOS管的栅极与转换控制模块电连接，此外转换控制模块与光伏电池之间设有第三MOS管和第四MOS管，在光伏电池反接时，能够断开第一MOS管和第二MOS管并导通第三MOS管和第四MOS管，无论光伏电池正接还是反接，都可以保证光伏电池与与转换控制模块的连接正确，这样温度不会升高，且无需采用直流接触器，成本低。
The invention discloses a photovoltaic energy storage circuit, a photovoltaic air conditioning system and a photovoltaic air conditioner, and belongs to the field of photovoltaic energy storage. In the photovoltaic energy storage circuit, the positive output end of the photovoltaic cell is connected to the source of the first MOS tube, the drain of the first MOS tube is connected to the positive input end of the conversion control module, and the negative output end of the photovoltaic cell is connected to the drain of the second MOS tube, The source of the second MOS tube is connected to the negative input terminal of the conversion control module, the gates of the first MOS tube and the second MOS tube are electrically connected to the conversion control module, and a third MOS tube is arranged between the conversion control module and the photovoltaic cell And the fourth MOS tube, when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube can be disconnected and the third MOS tube and the fourth MOS tube can be turned on. Regardless of whether the photovoltaic cell is connected directly or reversely, the photovoltaic cell can be guaranteed. The battery is properly connected to the conversion control module, so that the temperature does not rise, and the DC contactor is not required, and the cost is low.
Description
Technical Field
The invention relates to the field of photovoltaic energy storage, in particular to a photovoltaic energy storage circuit, a control method of the photovoltaic energy storage circuit, a photovoltaic air conditioning system and a photovoltaic air conditioner.
Background
A basic topological structure of a traditional photovoltaic (storage) air conditioning system is shown in fig. 1, a direct current contactor is added on a photovoltaic side to realize the isolation of a photovoltaic system and the air conditioning system, but the cost is high; in order to reduce the cost, a second basic topology of a photovoltaic (storage) air conditioning system is proposed, as shown in fig. 2, the photovoltaic input side is connected directly to the photovoltaic DC/DC, but also brings new problems: when the photovoltaic is in positive and negative reverse connection, the electric energy output by the photovoltaic is consumed all the time through the switching tube Q1 and the inductor L1, and at the moment, the photovoltaic cell is close to open circuit, the electric energy output by the photovoltaic is converted into heat energy to be consumed, so that the temperature rise problem of the controller is aggravated; in addition, at the moment, the photovoltaic input voltage is sampled by the sampling unit and sent to the control unit, and the control unit judges that the photovoltaic input is reversely connected, so that a fault can be reported, but the photovoltaic can not be cut out. The photovoltaic end connection is carried out in the engineering installation link, and the problem that the photovoltaic end connection is reversely connected can be frequently reported.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a photovoltaic energy storage circuit, a control method thereof, a photovoltaic air conditioning system and a photovoltaic air conditioner, and aims to solve the problems that the cost of the conventional photovoltaic air conditioning system is high due to the use of a direct current contactor, temperature rise is easy to occur when the direct current contactor is not used, and the photovoltaic air conditioning system cannot be switched out when the direct current contactor is reversely connected.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect,
a photovoltaic energy storage circuit comprises a photovoltaic cell, a conversion control module and an energy storage system, wherein the conversion control module is connected with the energy storage system; further comprising:
the MOS transistor comprises a first MOS transistor and a second MOS transistor;
the positive output end of the photovoltaic cell is connected with the source electrode of the first MOS tube, and the drain electrode of the first MOS tube is connected with the positive input end of the conversion control module;
the negative output end of the photovoltaic cell is connected with the drain electrode of the second MOS tube, and the source electrode of the second MOS tube is connected with the negative input end of the conversion control module;
and the grids of the first MOS tube and the second MOS tube are electrically connected with the conversion control module.
Further, still include: a third MOS transistor and a fourth MOS transistor;
the negative output end of the photovoltaic cell is connected with the source electrode of a third MOS tube, and the drain electrode of the third MOS tube is connected with the positive input end of the conversion control module;
the positive output end of the photovoltaic cell is connected with the drain electrode of a fourth MOS tube, and the source electrode of the fourth MOS tube is connected with the negative input end of the conversion control module;
and the grids of the third MOS tube and the fourth MOS tube are electrically connected with the conversion control module.
Further, the conversion control module comprises a control unit, an auxiliary power supply and a conversion circuit; the grid electrodes of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are connected with the control unit, the conversion circuit is connected with the energy storage system, and the auxiliary power supply takes electricity from the conversion circuit and does not supply power to the control unit.
Further, the conversion control module further comprises: and the sampling unit is connected with the control unit and used for sampling whether the photovoltaic cell is reversely connected or not and sending a sampling result to the control unit so that the control unit can control the connection and disconnection of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube.
Further, the sampling unit samples a voltage between the positive output end and the negative output end of the photovoltaic cell.
Further, when the photovoltaic cell is connected positively, the first MOS tube and the second MOS tube are connected, and the third MOS tube and the fourth MOS tube are disconnected.
Further, when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube are turned off, and the third MOS tube and the fourth MOS tube are turned on.
Further, the conversion circuit includes: the charging and discharging controller is connected with the boost circuit;
one end of the boosting circuit is connected with the input end of the conversion circuit, and the input end of the conversion circuit is a positive input end and a negative input end of the conversion circuit;
one end of the charge and discharge controller is connected with the energy storage system, and the other end of the charge and discharge controller is connected with the other end of the conversion booster circuit; one end of the bidirectional controller is connected with the other end of the charge-discharge controller, and the other end of the bidirectional controller is connected with a direct-current bus.
In a second aspect of the present invention,
a photovoltaic energy storage circuit control method is applied to the circuit in the technical scheme of the first aspect, and comprises the following steps:
obtaining the wiring condition of the photovoltaic cell, wherein the wiring condition comprises positive connection and reverse connection;
when the photovoltaic cell is connected positively, the first MOS tube and the second MOS tube are controlled to be conducted, and the third MOS tube and the fourth MOS tube are controlled to be disconnected; when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube are controlled to be switched off, and the third MOS tube and the fourth MOS tube are switched on.
In a third aspect,
a photovoltaic air conditioning system comprises the circuit of any one of the technical solutions of the first aspect
In a fourth aspect of the present invention,
a photovoltaic air conditioner comprises the system in the technical scheme of the third aspect.
Has the advantages that:
the technical scheme of the application provides a photovoltaic energy storage circuit and a control method thereof, a photovoltaic air-conditioning system and a photovoltaic air conditioner, wherein a positive output end of a photovoltaic battery in the photovoltaic energy storage circuit is connected with a source electrode of a first MOS (metal oxide semiconductor) tube, a drain electrode of the first MOS tube is connected with a positive input end of a conversion control module, a negative output end of the photovoltaic battery is connected with a drain electrode of a second MOS tube, a source electrode of the second MOS tube is connected with a negative input end of the conversion control module, and grid electrodes of the first MOS tube and the second MOS tube are electrically connected with the conversion control module. The conversion control module can be through the signal that changes the grid of first MOS pipe and second MOS pipe like this, and then change the break-make of first MOS pipe and second MOS pipe, with realize photovoltaic cell and conversion control module's connection and disconnection, can break off first MOS pipe and second MOS pipe when photovoltaic cell joins conversely, avoid taking place photovoltaic cell still to be connected with conversion control module, the condition that the temperature rose, adopt first MOS pipe and second MOS pipe need not to adopt direct current contactor, have advantage with low costs.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional photovoltaic energy storage circuit employing a DC contactor;
FIG. 2 is a schematic diagram of a photovoltaic energy storage circuit of a conventional photovoltaic cell direct-connection conversion control module;
fig. 3 is a schematic structural diagram of a photovoltaic energy storage circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a specific photovoltaic energy storage circuit according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling a photovoltaic energy storage circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the technical solutions of the present invention is provided with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 3, an embodiment of the present invention provides a photovoltaic energy storage circuit, including a photovoltaic cell, a conversion control module, and an energy storage system, where the conversion control module is connected to the energy storage system; further comprising:
a first MOS transistor Q3 and a second MOS transistor Q4;
the positive output end of the photovoltaic cell is connected with the source electrode of a first MOS tube Q3, and the drain electrode of the first MOS tube Q3 is connected with the positive input end of the conversion control module;
the negative output end of the photovoltaic cell is connected with the drain electrode of a second MOS tube Q4, and the source electrode of the second MOS tube Q4 is connected with the negative input end of the conversion control module;
the gates of the first MOS transistor Q3 and the second MOS transistor Q4 are electrically connected with the conversion control module.
It should be noted that the positive output end of the photovoltaic cell is the positive level of the photovoltaic cell when the photovoltaic cell is positively connected; the negative output end of the photovoltaic cell is the negative electrode of the photovoltaic cell when the photovoltaic cell is positively connected; it will be appreciated that when the cells are reversed, the negative terminal of the photovoltaic cell is the electrically positive output and the positive terminal of the photovoltaic cell is the negative output. The positive input end of the conversion control module is a port connected with the positive output end when the photovoltaic cell is positively connected; the negative input end of the conversion control module is a port connected with the negative output end when the photovoltaic cell is positively connected.
In the photovoltaic energy storage circuit provided by the embodiment of the invention, the positive output end of the photovoltaic cell is connected with the source electrode of the first MOS transistor, the drain electrode of the first MOS transistor is connected with the positive input end of the conversion control module, the negative output end of the photovoltaic cell is connected with the drain electrode of the second MOS transistor, the source electrode of the second MOS transistor is connected with the negative input end of the conversion control module, and the grid electrodes of the first MOS transistor and the second MOS transistor are electrically connected with the conversion control module. The conversion control module can be through the signal that changes the grid of first MOS pipe and second MOS pipe like this, and then change the break-make of first MOS pipe and second MOS pipe, with realize photovoltaic cell and conversion control module's connection and disconnection, can break off first MOS pipe and second MOS pipe when photovoltaic cell joins conversely, avoid taking place photovoltaic cell still to be connected with conversion control module, the condition that the temperature rose, adopt first MOS pipe and second MOS pipe need not to adopt direct current contactor, have advantage with low costs.
As a supplementary description of the above embodiment, as shown in fig. 4, an embodiment of the present invention provides a specific photovoltaic energy storage circuit, including a photovoltaic cell, a conversion control module and an energy storage system, where the conversion control module is connected to the energy storage system; further comprising:
a first MOS transistor Q3 and a second MOS transistor Q4;
the positive output end of the photovoltaic cell is connected with the source electrode of a first MOS tube Q3, and the drain electrode of the first MOS tube Q3 is connected with the positive input end of the conversion control module;
the negative output end of the photovoltaic cell is connected with the drain electrode of a second MOS tube Q4, and the source electrode of the second MOS tube Q4 is connected with the negative input end of the conversion control module;
the gates of the first MOS transistor Q3 and the second MOS transistor Q4 are electrically connected with the conversion control module.
Further comprising: a third MOS transistor Q5 and a fourth MOS transistor Q2;
the negative output end of the photovoltaic cell is connected with the source electrode of a third MOS tube Q5, and the drain electrode of the third MOS tube Q5 is connected with the positive input end of the conversion control module;
the positive output end of the photovoltaic cell is connected with the drain electrode of a fourth MOS tube Q2, and the source electrode of the fourth MOS tube Q2 is connected with the negative input end of the conversion control module;
the gates of the third MOS transistor Q5 and the fourth MOS transistor Q2 are electrically connected to the conversion control module.
The conversion control module comprises a control unit, an auxiliary power supply and a conversion circuit; the gates of the first MOS transistor Q3, the second MOS transistor Q4, the third MOS transistor Q5 and the fourth MOS transistor Q2 are connected with the control unit, the conversion circuit is connected with the energy storage system, and the auxiliary power supply takes electricity from the conversion circuit and does not supply power to the control unit. The conversion control module further includes: and the sampling unit is connected with the control unit and is used for sampling whether the photovoltaic cell is reversely connected or not and sending a sampling result to the control unit so that the control unit can control the on-off of the first MOS transistor Q3, the second MOS transistor Q4, the third MOS transistor Q5 and the fourth MOS transistor Q2. Specifically, the sampling unit samples a voltage between a positive output terminal and a negative output terminal of the photovoltaic cell.
When the voltage between the positive output end and the negative output end is a positive value, the photovoltaic cell is indicated to be in positive connection, and when the voltage between the positive output end and the negative output end is a negative value, the photovoltaic cell is indicated to be in reverse connection.
When the photovoltaic cell is connected positively, the first MOS transistor Q3 and the second MOS transistor Q4 are switched on, and the third MOS transistor Q5 and the fourth MOS transistor Q2 are switched off. At this time, the positive output end of the photovoltaic cell is connected with the positive input end, and the negative output end is connected with the negative input end. Namely, the positive pole of the photovoltaic cell is connected with the positive input end, and the negative pole of the photovoltaic cell is connected with the negative input end.
When the photovoltaic cell is reversely connected, the first MOS transistor Q3 and the second MOS transistor Q4 are turned off, and the third MOS transistor Q5 and the fourth MOS transistor Q2 are turned on. At this time, the negative output end of the photovoltaic cell is connected with the positive input end, and the positive output end is connected with the negative input end. In essence, however, the photovoltaic cell is still connected with the positive input terminal at the positive electrode and the negative input terminal at the negative electrode. Therefore, even if the sampling unit and the control unit are reversely connected, the photovoltaic cell can be correctly connected by changing the on-off of the four MOS tubes, and the normal operation of the photovoltaic energy storage circuit is ensured.
It should be particularly noted that the control unit does not rely on a computer program to control the on/off of the MOS transistor, and based on the on/off characteristics of the MOS transistor, the control unit only needs to control the voltage of the gate of the MOS transistor, so that the control unit only needs to provide different voltages for the MOS transistor.
Wherein, converting circuit includes: the boost circuit, the charge-discharge controller DC/DC and the dual controller DC/AC;
one end of the booster circuit is connected with the input end of the conversion circuit, and the input end of the conversion circuit is a positive input end and a negative input end of the conversion circuit;
one end of the charging and discharging controller DC/DC is connected with the energy storage system, and the other end of the charging and discharging controller DC/DC is connected with the other end of the conversion booster circuit; one end of the double controller DC/AC is connected with the other end of the charging and discharging controller DC/DC, and the other end of the double controller DC/AC is connected with the direct current bus.
In the embodiment of the present invention, the boost circuit adopts a circuit as shown in fig. 4, a positive input end is connected to one end of an inductor L1, a switching tube Q1 is connected between the other end of the inductor L1 and a negative input end, the switching tube Q1 is a triode whose collector and emitter are connected to a diode, wherein an anode of the diode is connected to an emitter of the triode, a cathode of the diode is connected to a collector, the other end of the inductor L1 is connected to the collector of the triode, the negative input end is connected to the emitter of the triode, the other end of the inductor L1 is connected to an anode of a boost diode D1, a cathode of the boost diode D1 is connected to a charge-discharge controller and a positive input end of a bidirectional controller, and a capacitor C1 is arranged between the charge-discharge controller and the bidirectional controller.
The circuit shown in fig. 4 is composed of an energy storage system (with BMS), a photovoltaic cell, a charge-discharge controller (DC/DC), a booster circuit (composed of L1, Q1, D1), a bidirectional controller DC/AC, a direct current contactor K7/K8, an auxiliary power supply, a control unit, a sampling unit, and an alternating current bus. The auxiliary power supply supplies power to the control unit and the sampling unit, the sampling unit can sample the voltage on the photovoltaic side, and the control unit can output control signals S1/S2/S3/S4/S5 to respectively control the on and off of the switching tube Q1 and the MOS tube Q2/Q3/Q4/Q5.
The operation of the circuit shown in fig. 4 is as follows:
when the positive electrode and the negative electrode of the photovoltaic cell are correctly connected, the sampling unit can sample a voltage signal at the photovoltaic side and send the voltage signal to the control unit, and the control unit judges that the photovoltaic cell is connected positively and sends a control signal S3/S4 to enable the first MOS transistor Q3 and the second MOS transistor Q4 to be switched on, so that the photovoltaic cell is switched on to normally work.
When the positive electrode and the negative electrode of the photovoltaic cell are reversely connected, the sampling unit can sample a voltage signal of the photovoltaic cell and send the voltage signal to the control unit, and the control unit judges that the photovoltaic cell is reversely connected and sends a control signal S2/S5 to enable the fourth MOS tube Q2 and the third MOS tube Q5 to be switched on, so that the photovoltaic cell is switched on to normally work.
Because the newly added auxiliary device in the circuit in fig. 4 is an MOS transistor, the current passing through the MOS transistor can flow in both directions, so that charging and discharging can be realized, and a device with small on-resistance can be selected to reduce the on-loss thereof.
According to the specific photovoltaic energy storage circuit provided by the embodiment of the invention, the auxiliary device and the optimized control logic are added on the basis of the traditional topology, so that the system can be kept to normally work no matter whether the anode and the cathode are reversely connected during photovoltaic access, manual intervention is not needed, and the problem caused by reverse photovoltaic connection is solved. Compared with a direct current contactor, the added auxiliary device is low in cost, and the function of the photovoltaic energy storage circuit can be perfected on the basis of cost reduction.
In one embodiment, the present invention provides a method for controlling a photovoltaic energy storage circuit, which is applied to the photovoltaic energy storage circuit provided in the above embodiment, and the method includes the following steps:
obtaining the wiring condition of the photovoltaic cell, wherein the wiring condition comprises positive connection and reverse connection; the wiring condition can be obtained by measuring the voltages at the two ends of the photovoltaic cell by the sampling unit, and the positive connection condition and the negative connection condition of the photovoltaic cell are obtained according to the positive and negative of the voltages.
When the photovoltaic cell is connected positively, the first MOS tube and the second MOS tube are controlled to be conducted, and the third MOS tube and the fourth MOS tube are controlled to be disconnected; when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube are controlled to be switched off, and the third MOS tube and the fourth MOS tube are controlled to be switched on.
According to the control method provided by the embodiment of the invention, when the photovoltaic cell is connected, the system can be kept to normally work no matter whether the anode and the cathode are reversely connected, manual intervention is not needed, and the problem caused by reverse connection of the photovoltaic cell is solved.
In one embodiment, the invention provides a photovoltaic air conditioning system, which includes the photovoltaic energy storage circuit provided in the above embodiment.
The photovoltaic air conditioning system provided by the embodiment of the invention has a direct current input self-correcting function. The auxiliary device and the optimized control logic are added on the basis of the traditional topology, so that the system can normally work no matter whether the anode and the cathode are reversely connected during photovoltaic access, manual intervention is not needed, and the problem caused by reverse photovoltaic connection is solved. Compared with a direct current contactor, the added auxiliary device is low in cost, and the functions of the photovoltaic air conditioning system can be perfected on the basis of cost reduction.
In one embodiment, the invention provides a photovoltaic air conditioner, which comprises the photovoltaic air conditioning system provided by the embodiment.
According to the photovoltaic air conditioner provided by the embodiment of the invention, when photovoltaic access is carried out, the system can be kept to normally work no matter whether the anode and the cathode are reversely connected, manual intervention is not needed, and the problem caused by reverse connection of photovoltaic is solved. Compared with a direct current contactor, the added auxiliary device is low in cost, and the function of the photovoltaic energy storage circuit can be perfected on the basis of cost reduction.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (11)
1. A photovoltaic energy storage circuit comprises a photovoltaic cell, a conversion control module and an energy storage system, wherein the conversion control module is connected with the energy storage system; it is characterized by also comprising:
the MOS transistor comprises a first MOS transistor and a second MOS transistor;
the positive output end of the photovoltaic cell is connected with the source electrode of the first MOS tube, and the drain electrode of the first MOS tube is connected with the positive input end of the conversion control module;
the negative output end of the photovoltaic cell is connected with the drain electrode of the second MOS tube, and the source electrode of the second MOS tube is connected with the negative input end of the conversion control module;
and the grids of the first MOS tube and the second MOS tube are electrically connected with the conversion control module.
2. The circuit of claim 1, further comprising: a third MOS transistor and a fourth MOS transistor;
the negative output end of the photovoltaic cell is connected with the source electrode of a third MOS tube, and the drain electrode of the third MOS tube is connected with the positive input end of the conversion control module;
the positive output end of the photovoltaic cell is connected with the drain electrode of a fourth MOS tube, and the source electrode of the fourth MOS tube is connected with the negative input end of the conversion control module;
and the grids of the third MOS tube and the fourth MOS tube are electrically connected with the conversion control module.
3. The circuit of claim 2, wherein: the conversion control module comprises a control unit, an auxiliary power supply and a conversion circuit; the grid electrodes of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are connected with the control unit, the conversion circuit is connected with the energy storage system, and the auxiliary power supply takes electricity from the conversion circuit and does not supply power to the control unit.
4. The circuit of claim 3, wherein the conversion control module further comprises: and the sampling unit is connected with the control unit and used for sampling whether the photovoltaic cell is reversely connected or not and sending a sampling result to the control unit so that the control unit can control the connection and disconnection of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube.
5. The circuit of claim 4, wherein: the sampling unit samples voltage between the positive output end and the negative output end of the photovoltaic cell.
6. The circuit of claim 4, wherein: when the photovoltaic cell is connected positively, the first MOS tube and the second MOS tube are connected, and the third MOS tube and the fourth MOS tube are disconnected.
7. The circuit of claim 4, wherein: when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube are switched off, and the third MOS tube and the fourth MOS tube are switched on.
8. The circuit of claim 3, wherein: the conversion circuit includes: the charging and discharging controller is connected with the boost circuit;
one end of the boosting circuit is connected with the input end of the conversion circuit, and the input end of the conversion circuit is a positive input end and a negative input end of the conversion circuit;
one end of the charge and discharge controller is connected with the energy storage system, and the other end of the charge and discharge controller is connected with the other end of the conversion booster circuit; one end of the bidirectional controller is connected with the other end of the charge-discharge controller, and the other end of the bidirectional controller is connected with a direct-current bus.
9. A photovoltaic energy storage circuit control method applied to the circuit of any one of claims 2 to 8, the method comprising the steps of:
obtaining the wiring condition of the photovoltaic cell, wherein the wiring condition comprises positive connection and reverse connection;
when the photovoltaic cell is connected positively, the first MOS tube and the second MOS tube are controlled to be conducted, and the third MOS tube and the fourth MOS tube are controlled to be disconnected; when the photovoltaic cell is reversely connected, the first MOS tube and the second MOS tube are controlled to be switched off, and the third MOS tube and the fourth MOS tube are switched on.
10. The utility model provides a photovoltaic air conditioning system which characterized in that: comprising the circuit of any one of claims 1-8.
11. The utility model provides a photovoltaic air conditioner which characterized in that: comprising the system of claim 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560577.4A CN114285142A (en) | 2021-12-20 | 2021-12-20 | Photovoltaic energy storage circuit and control method thereof, as well as photovoltaic air conditioning system and photovoltaic air conditioning |
| PCT/CN2022/106434 WO2023115924A1 (en) | 2021-12-20 | 2022-07-19 | Photovoltaic energy storage circuit and control method thereof, photovoltaic air conditioning system, and photovoltaic air conditioner |
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| CN202111560577.4A CN114285142A (en) | 2021-12-20 | 2021-12-20 | Photovoltaic energy storage circuit and control method thereof, as well as photovoltaic air conditioning system and photovoltaic air conditioning |
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Cited By (2)
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| CN114727451A (en) * | 2022-04-29 | 2022-07-08 | 成都市联洲国际技术有限公司 | A kind of double dimmer and its circuit verification method |
| WO2023115924A1 (en) * | 2021-12-20 | 2023-06-29 | 珠海格力电器股份有限公司 | Photovoltaic energy storage circuit and control method thereof, photovoltaic air conditioning system, and photovoltaic air conditioner |
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| CN118263964B (en) * | 2024-05-31 | 2024-08-30 | 合肥华思系统有限公司 | Energy storage system and power line reverse connection detection control mechanism thereof |
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Also Published As
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| WO2023115924A1 (en) | 2023-06-29 |
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