CN111725879A - Light-storage combined power supply mobile energy storage system and control method thereof - Google Patents

Light-storage combined power supply mobile energy storage system and control method thereof Download PDF

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Publication number
CN111725879A
CN111725879A CN201910223525.4A CN201910223525A CN111725879A CN 111725879 A CN111725879 A CN 111725879A CN 201910223525 A CN201910223525 A CN 201910223525A CN 111725879 A CN111725879 A CN 111725879A
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China
Prior art keywords
energy storage
converter
state
photovoltaic cell
storage battery
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Granted
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CN201910223525.4A
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Chinese (zh)
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CN111725879B (en
Inventor
周晨
陶以彬
吴福保
余豪杰
杨波
李官军
庄俊
刘欢
秦昊
李跃龙
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China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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Priority to CN201910223525.4A priority Critical patent/CN111725879B/en
Priority to PCT/CN2019/110929 priority patent/WO2020192086A1/en
Publication of CN111725879A publication Critical patent/CN111725879A/en
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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
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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

Abstract

The invention relates to a mobile energy storage system with light storage combined power supply and a control method thereof, wherein the mobile energy storage system comprises a mobile container, a photovoltaic cell arranged outside the mobile container, an energy storage cell arranged inside the mobile container, an energy storage converter control circuit, an uninterrupted power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system; when the mobile energy storage system is shut down, the photovoltaic cell and the storage battery supply power to the internal load, the electric energy of the energy storage battery is not consumed, and when the mobile energy storage system is operated, the photovoltaic cell can also charge the energy storage battery, so that the power supply time of the mobile energy storage system is prolonged.

Description

Light-storage combined power supply mobile energy storage system and control method thereof
Technical Field
The invention relates to the field of mobile emergency power supply, in particular to a mobile energy storage system with light storage combined power supply and a control method thereof.
Background
The dependence of modern society on electric power energy is increasingly strengthened, the demand for electricity is rapidly increased, the requirement on power supply quality is higher and higher, and particularly for loads which are particularly important in first-level loads, once the power supply is interrupted, great political influence or economic loss can be caused; in particular, temporary power supply is usually required for branch electric loads or construction equipment during electric power construction, electric power equipment transformation and field operation.
As the main power of the emergency power supply equipment of the power grid, the working environment of the mobile energy storage system does not have an external commercial power, and in the prior art, the energy storage battery inside the mobile energy storage system supplies power to an external load and an internal load at the same time, so that the power supply time of the energy storage system to the load is reduced to a certain extent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a mobile energy storage system with light storage combined power supply and a control method thereof.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides a movable energy storage system with light storage combined power supply, and the improvement is that the movable energy storage system comprises: the system comprises a movable container, a photovoltaic cell arranged outside the movable container, and an energy storage cell, an energy storage converter control loop, an uninterruptible power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system which are arranged inside the movable container;
the energy storage battery is connected with the energy storage converter, and the energy storage converter is connected with a load;
the reverse switch is connected with the energy storage battery, an uninterruptible power supply and a DC/DC converter, and the DC/DC converter is connected with the photovoltaic battery;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, the direct current end of the uninterruptible power supply is respectively connected with the reverse switch and the storage battery, the alternating current input end of the uninterruptible power supply is connected with the energy storage converter, and the alternating current output end of the uninterruptible power supply is connected with the energy storage converter control circuit and the monitoring system.
Preferably, the monitoring system is used for controlling a reverse switch to switch on the energy storage battery and the DC/DC converter or switch on an uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
Further, the monitoring system includes:
the first monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the energy storage battery and sending a fourth control instruction to the DC/DC converter when the state of the mobile energy storage system is the running state;
the second monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the uninterruptible power supply when the state of the mobile energy storage system is in an off state, and sending a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load;
the load comprises an energy storage converter control loop and a monitoring system.
Further, the second monitoring unit includes:
the first monitoring subunit is used for sending a second control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is greater than or equal to 60%;
the second monitoring subunit is used for sending a first control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is less than 60%;
the third monitoring subunit is used for sending a fourth control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is more than or equal to 10%;
and the fourth monitoring subunit is used for sending a third control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%.
Further, the DC/DC converter includes:
the first adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the first control instruction and is communicated with a storage battery;
the second adjusting unit is used for adjusting the output power of the photovoltaic cell to be the load power when receiving the second control instruction;
the third adjusting unit is used for adjusting the photovoltaic cell to be in a discharge stopping mode when receiving the third control instruction;
and the fourth adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the fourth control instruction.
Preferably, the DC/DC converter is a DC/DC converter having an MPPT function.
Preferably, the default state of the reverse switch is to turn on the uninterruptible power supply and the DC/DC converter.
The invention provides a control method of a mobile energy storage system powered by light storage in a combined manner, which is improved in that the method comprises the following steps:
controlling a reverse switch to switch on the energy storage battery and the DC/DC converter or switch on an uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
Preferably, the controlling the reverse switch to switch on the energy storage battery and the DC/DC converter or switch on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system includes:
when the mobile energy storage system is in the running state, the monitoring system controls the reverse switch to switch on the DC/DC converter and the energy storage battery and sends a fourth control instruction to the DC/DC converter;
when the mobile energy storage system is in an off state, the monitoring system controls the reverse switch to connect the DC/DC converter and the uninterruptible power supply, and sends a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load;
the load comprises an energy storage converter control loop and a monitoring system.
Preferably, the sending of the control command to the DC/DC converter according to the comparison result between the output power of the photovoltaic cell and the power of the load includes:
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is larger than or equal to 60%, the monitoring system sends a second control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is smaller than 60%, the monitoring system sends a first control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is smaller than the power of the load and the state of charge of the storage battery is larger than or equal to 10%, the monitoring system sends a fourth control instruction to the DC/DC converter;
and when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%, the monitoring system sends a third control instruction to the DC/DC converter.
Further, when the DC/DC converter receives the first control instruction, the output power of the photovoltaic cell is adjusted to be the maximum output power, and the storage battery is switched on;
when the DC/DC converter receives the second control instruction, the output power of the photovoltaic cell is adjusted to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is adjusted to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, adjusting the output power of the photovoltaic cell to be the maximum output power.
Compared with the closest prior art, the invention has the following beneficial effects:
the invention provides a mobile energy storage system with light storage combined power supply and a control method thereof, wherein the mobile energy storage system comprises a mobile container, a photovoltaic cell arranged outside the mobile container, an energy storage cell arranged inside the mobile container, an energy storage converter control loop, an uninterrupted power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system; the mobile energy storage system provided by the invention supplies power to an internal load through the photovoltaic cell and the storage battery arranged in the mobile energy storage system during outage, and does not consume the electric energy of the energy storage cell; when the mobile energy storage system operates, the photovoltaic battery can charge the energy storage battery, so that the power supply time of the energy storage battery is prolonged.
Drawings
FIG. 1 is a schematic diagram of a mobile energy storage system according to the present invention;
fig. 2 is a flowchart of a control method of the mobile energy storage system according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a mobile energy storage system with light storage combined power supply, as shown in fig. 1, the mobile energy storage system comprises: the system comprises a movable container (not shown), a photovoltaic cell arranged outside the movable container, an energy storage cell arranged inside the movable container, an energy storage converter control loop, an uninterruptible power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system, wherein the energy storage cell is connected with the energy storage converter;
the energy storage battery is connected with the energy storage converter, and the energy storage converter is connected with a load;
the reverse switch is connected with the energy storage battery, an uninterruptible power supply and a DC/DC converter, and the DC/DC converter is connected with the photovoltaic battery;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, the direct current end of the uninterruptible power supply is respectively connected with the reverse switch and the storage battery, the alternating current input end of the uninterruptible power supply is connected with the energy storage converter, and the alternating current output end of the uninterruptible power supply is connected with the energy storage converter control circuit and the monitoring system.
In the embodiment provided by the invention, the monitoring system is used for controlling the reverse switch to switch on the energy storage battery and the DC/DC converter or switch on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
To achieve the above-mentioned function, the monitoring system includes:
the first monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the energy storage battery and sending a fourth control instruction to the DC/DC converter when the state of the mobile energy storage system is the running state; at the moment, the energy storage battery supplies power for an external load, and the photovoltaic battery charges the energy storage battery, so that the service time of the energy storage system is prolonged.
The second monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the uninterruptible power supply when the state of the mobile energy storage system is in an off state, and sending a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load; the load comprises an energy storage converter control loop and a monitoring system; at the moment, the power supply of the internal load of the energy storage system is from the storage battery and the photovoltaic cell, the electric quantity of the energy storage cell is not consumed, the electric quantity of the energy storage cell is saved, the photovoltaic cell can also charge the storage battery, and the service time of the internal load is prolonged.
The second monitoring unit of the monitoring system comprises:
the first monitoring subunit is used for sending a second control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is greater than or equal to 60%;
the second monitoring subunit is used for sending a first control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is less than 60%;
the third monitoring subunit is used for sending a fourth control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is more than or equal to 10%;
and the fourth monitoring subunit is used for sending a third control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%.
In an embodiment of the present invention, the DC/DC converter includes:
the first adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the first control instruction and is communicated with a storage battery;
the second adjusting unit is used for adjusting the output power of the photovoltaic cell to be the load power when receiving the second control instruction;
the third adjusting unit is used for adjusting the photovoltaic cell to be in a discharge stopping mode when receiving the third control instruction;
and the fourth adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the fourth control instruction.
In addition, the DC/DC converter of the mobile energy storage system in the embodiment of the invention is a DC/DC converter with an MPPT function, so that the aim of adjusting the output power of the photovoltaic cell to be the maximum output power can be realized; the default state of the reverse switch is to turn on the uninterruptible power supply and the DC/DC converter.
The invention provides a control method of a mobile energy storage system with light storage combined power supply, which comprises the following steps:
controlling a reverse switch to switch on the energy storage battery and the DC/DC converter or switch on an uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
In an embodiment of the present invention, as shown in fig. 2, the controlling the reverse switch to switch on the energy storage battery and the DC/DC converter or switch on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system includes:
when the mobile energy storage system is in the running state, the monitoring system controls the reverse switch to switch on the DC/DC converter and the energy storage battery and sends a fourth control instruction to the DC/DC converter;
when the mobile energy storage system is in an off state, the monitoring system controls the reverse switch to connect the DC/DC converter and the uninterruptible power supply, and sends a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load;
the load comprises an energy storage converter control loop and a monitoring system.
Specifically, the sending of the control instruction to the DC/DC converter according to the comparison result between the output power of the photovoltaic cell and the power of the load includes:
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is larger than or equal to 60%, the monitoring system sends a second control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is smaller than 60%, the monitoring system sends a first control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is smaller than the power of the load and the state of charge of the storage battery is larger than or equal to 10%, the monitoring system sends a fourth control instruction to the DC/DC converter;
and when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%, the monitoring system sends a third control instruction to the DC/DC converter.
Further, when the DC/DC converter receives the first control instruction, the output power of the photovoltaic cell is adjusted to be the maximum output power, and the storage battery is switched on;
when the DC/DC converter receives the second control instruction, the output power of the photovoltaic cell is adjusted to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is adjusted to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, adjusting the output power of the photovoltaic cell to be the maximum output power.
In summary, the present invention provides a mobile energy storage system with optical storage combined power supply and a control method thereof, including a mobile container, a photovoltaic cell disposed outside the mobile container, and an energy storage cell, an energy storage converter control circuit, an uninterruptible power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system disposed inside the mobile container; the mobile energy storage system provided by the invention supplies power to an internal load through the photovoltaic cell and the storage battery arranged in the mobile energy storage system during outage, and does not consume the electric energy of the energy storage cell; when the mobile energy storage system operates, the photovoltaic battery can charge the energy storage battery, so that the power supply time of the energy storage battery is prolonged.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (11)

1. A mobile energy storage system for combined optical and energy storage power supply, the mobile energy storage system comprising: the system comprises a movable container, a photovoltaic cell arranged outside the movable container, and an energy storage cell, an energy storage converter control loop, an uninterruptible power supply, a storage battery, a reverse switch, a DC/DC converter and a monitoring system which are arranged inside the movable container;
the energy storage battery is connected with the energy storage converter, and the energy storage converter is connected with a load;
the reverse switch is connected with the energy storage battery, an uninterruptible power supply and a DC/DC converter, and the DC/DC converter is connected with the photovoltaic battery;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, the direct current end of the uninterruptible power supply is respectively connected with the reverse switch and the storage battery, the alternating current input end of the uninterruptible power supply is connected with the energy storage converter, and the alternating current output end of the uninterruptible power supply is connected with the energy storage converter control circuit and the monitoring system.
2. The portable energy storage system of claim 1, wherein the monitoring system is configured to control a reverse switch to switch on the energy storage battery and the DC/DC converter or switch on the uninterruptible power supply and the DC/DC converter according to a state of the portable energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
3. A combined light and storage powered mobile energy storage system according to claim 2 wherein the monitoring system comprises:
the first monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the energy storage battery and sending a fourth control instruction to the DC/DC converter when the state of the mobile energy storage system is the running state;
the second monitoring unit is used for controlling the reverse switch to switch on the DC/DC converter and the uninterruptible power supply when the state of the mobile energy storage system is in an off state, and sending a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load;
the load comprises an energy storage converter control loop and a monitoring system.
4. A combined light and storage powered mobile energy storage system according to claim 3 wherein the second monitoring unit comprises:
the first monitoring subunit is used for sending a second control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is greater than or equal to 60%;
the second monitoring subunit is used for sending a first control instruction to the DC/DC converter when the output power of the photovoltaic cell is greater than the power of the load and the state of charge of the storage battery is less than 60%;
the third monitoring subunit is used for sending a fourth control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is more than or equal to 10%;
and the fourth monitoring subunit is used for sending a third control instruction to the DC/DC converter when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%.
5. A combined optical and electrical power supply mobile energy storage system according to claim 4, wherein said DC/DC converter comprises:
the first adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the first control instruction and is communicated with a storage battery;
the second adjusting unit is used for adjusting the output power of the photovoltaic cell to be the load power when receiving the second control instruction;
the third adjusting unit is used for adjusting the photovoltaic cell to be in a discharge stopping mode when receiving the third control instruction;
and the fourth adjusting unit is used for adjusting the output power of the photovoltaic cell to be the maximum output power when receiving the fourth control instruction.
6. A combined optical and storage power supply mobile energy storage system as claimed in claim 1, wherein said DC/DC converter is a DC/DC converter with MPPT function.
7. The portable energy storage system of claim 1, wherein the default state of the reverse switch is to turn on the ups and DC/DC converter.
8. A method for controlling a combined light and energy storage powered mobile energy storage system according to any of claims 1 to 7, the method comprising:
controlling a reverse switch to switch on the energy storage battery and the DC/DC converter or switch on an uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system;
if the energy storage battery is in a discharging mode or a charging mode, the state of the mobile energy storage system is an operating state, otherwise, the state of the mobile energy storage system is a shutdown state.
9. The method of claim 8, wherein controlling a reverse switch to turn on the energy storage battery and the DC/DC converter or turn on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system comprises:
when the mobile energy storage system is in the running state, the monitoring system controls the reverse switch to switch on the DC/DC converter and the energy storage battery and sends a fourth control instruction to the DC/DC converter;
when the mobile energy storage system is in an off state, the monitoring system controls the reverse switch to connect the DC/DC converter and the uninterruptible power supply, and sends a control instruction to the DC/DC converter according to a comparison result of the output power of the photovoltaic cell and the power of the load;
the load comprises an energy storage converter control loop and a monitoring system.
10. The method of claim 9, wherein sending a control command to the DC/DC converter based on the comparison of the output power of the photovoltaic cell and the power of the load comprises:
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is larger than or equal to 60%, the monitoring system sends a second control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is larger than the power of the load and the state of charge of the storage battery is smaller than 60%, the monitoring system sends a first control instruction to the DC/DC converter;
when the output power of the photovoltaic cell is smaller than the power of the load and the state of charge of the storage battery is larger than or equal to 10%, the monitoring system sends a fourth control instruction to the DC/DC converter;
and when the output power of the photovoltaic cell is less than the power of the load and the state of charge of the storage battery is less than 10%, the monitoring system sends a third control instruction to the DC/DC converter.
11. The method according to claim 10, wherein when the DC/DC converter receives the first control command, the output power of the photovoltaic cell is adjusted to the maximum output power, and the storage battery is turned on;
when the DC/DC converter receives the second control instruction, the output power of the photovoltaic cell is adjusted to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is adjusted to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, adjusting the output power of the photovoltaic cell to be the maximum output power.
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