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CN111725879B - 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
CN111725879B
CN111725879B CN201910223525.4A CN201910223525A CN111725879B CN 111725879 B CN111725879 B CN 111725879B CN 201910223525 A CN201910223525 A CN 201910223525A CN 111725879 B CN111725879 B CN 111725879B
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CN
China
Prior art keywords
energy storage
converter
storage battery
photovoltaic cell
power supply
Prior art date
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Active
Application number
CN201910223525.4A
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Chinese (zh)
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CN111725879A (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
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
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
Application granted granted Critical
Publication of CN111725879B publication Critical patent/CN111725879B/en
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Classifications

    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application relates to a movable energy storage system with combined light and storage power supply and a control method thereof, comprising a movable container, a photovoltaic cell arranged outside the movable container, an energy storage battery, 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 battery, the energy storage converter control loop, the uninterruptible power supply, the storage battery, the reverse switch, the DC/DC converter and the monitoring system are arranged inside the movable container; when the mobile energy storage system is in shutdown, the photovoltaic cell and the storage battery supply power to the internal load, so that the electric energy of the energy storage battery is not consumed, and when the mobile energy storage system is in operation, the photovoltaic cell can 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 application relates to the field of mobile emergency power supply, in particular to a mobile energy storage system with combined light and storage power supply and a control method thereof.
Background
The dependence of the modern society on electric power energy is increasingly stronger, the electricity demand is rapidly increased, the power supply quality requirement is higher and higher, and particularly for the load which is particularly important in primary loads, once the power supply is interrupted, great political influence or economic loss can be caused; in particular, temporary power supply to branch electrical loads or construction equipment is often required in electrical construction, electrical equipment retrofit, and field operations.
As the main strength of the power grid emergency power supply equipment, the working environment of the mobile energy storage system is free from external commercial power, and in the prior art, an energy storage battery in the mobile energy storage system supplies power to an external load and simultaneously supplies power to an internal load, so that the power supply time of the energy storage system to the load is shortened to a certain extent.
Disclosure of Invention
Aiming at the defects of the prior art, the application aims to provide the movable energy storage system with combined light and storage power supply and the control method thereof, when the movable energy storage system is stopped, the photovoltaic cell and the storage battery supply power to an internal load, the electric energy of the energy storage battery is not consumed, and when the movable energy storage system is operated, the photovoltaic cell can charge the energy storage battery, so that the power supply time of the movable energy storage system is prolonged.
The application aims at adopting the following technical scheme:
the application provides a movable energy storage system with combined light and storage power supply, which is characterized in that the movable energy storage system comprises: the device comprises a movable container, a photovoltaic cell arranged outside the movable container, an energy storage battery, 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 battery, the energy storage converter control loop, the uninterruptible power supply, the storage battery, the reverse switch, the DC/DC converter and the monitoring system 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 inverted switch is connected with the energy storage battery, the uninterruptible power supply and the DC/DC converter, and the DC/DC converter is connected with the photovoltaic cell;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, wherein the direct current end of the uninterruptible power supply is respectively connected with the inverted 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 loop and the monitoring system.
Preferably, the monitoring system is used for controlling the back-off 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;
and if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state.
Further, the monitoring system includes:
the first monitoring unit is used for controlling the inverted switch to switch on the DC/DC converter and the energy storage battery when the state of the movable energy storage system is an operation state, and sending a fourth control instruction to the DC/DC converter;
the second monitoring unit is used for controlling the inverted switch to switch on the DC/DC converter and the uninterrupted power supply when the state of the movable energy storage system is in the off-state, and sending a control instruction to the DC/DC converter according to the 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 battery is larger than the power of the load and the charge state of the storage battery is larger 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 battery is larger than the power of the load and the charge state of the storage battery is smaller 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 smaller than the power of the load and the charge state 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 smaller than the power of the load and the charge state of the storage battery is smaller 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 communicating the 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 stop the discharge 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 flyback switch is to turn on the uninterruptible power supply and the DC/DC converter.
The application provides a control method of a light-storage combined power supply mobile energy storage system, which is improved in that the method comprises the following steps:
controlling a reversing switch to switch on the energy storage battery and the DC/DC converter according to the state of the movable energy storage system, or switching on an uninterruptible power supply and the DC/DC converter;
and if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state.
Preferably, the controlling the back-off switch to switch on the energy storage battery and the DC/DC converter or to switch on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system includes:
when the state of the movable energy storage system is an operation state, the monitoring system controls the back-off 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 state of the movable energy storage system is in an off-line state, the monitoring system controls the back-off switch to switch on the DC/DC converter and the uninterrupted power supply, and sends a control instruction to the DC/DC converter according to the 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 a control command to the DC/DC converter according to the comparison result of 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 charge state 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 charge state 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 charge state of the storage battery is more than or equal to 10%, the monitoring system sends a fourth 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 charge state of the storage battery is smaller 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, regulating the output power of the photovoltaic cell to be the maximum output power, and switching on the storage battery;
when the DC/DC converter receives the second control instruction, regulating the output power of the photovoltaic cell to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is regulated to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, regulating the output power of the photovoltaic cell to be the maximum output power.
Compared with the closest prior art, the application has the following beneficial effects:
the application provides a movable energy storage system with combined light and storage power supply and a control method thereof, comprising a movable container, a photovoltaic cell arranged outside the movable container, an energy storage battery, 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 battery, the energy storage converter control loop, the uninterruptible power supply, the storage battery, the reverse switch, the DC/DC converter and the monitoring system are arranged inside the movable container; when the mobile energy storage system is in shutdown, the photovoltaic cells and the storage batteries which are arranged in the mobile energy storage system supply power to the internal load, so that the electric energy of the energy storage battery is not consumed; when the mobile energy storage system operates, the photovoltaic cell 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 of the present application;
FIG. 2 is a flow chart of a control method of the mobile energy storage system of the present application.
Detailed Description
The following describes the embodiments of the present application in further detail with reference to the drawings.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides a mobile energy storage system powered by light and storage combination, as shown in fig. 1, the mobile energy storage system comprises: a mobile container (not shown), a photovoltaic cell arranged outside the mobile container, and an energy storage battery, 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 mobile container;
the energy storage battery is connected with the energy storage converter, and the energy storage converter is connected with a load;
the inverted switch is connected with the energy storage battery, the uninterruptible power supply and the DC/DC converter, and the DC/DC converter is connected with the photovoltaic cell;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, wherein the direct current end of the uninterruptible power supply is respectively connected with the inverted 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 loop and the monitoring system.
In the embodiment provided by the application, the monitoring system is used for controlling the back-off switch to switch on the energy storage battery and the DC/DC converter or switch on the uninterrupted power supply and the DC/DC converter according to the state of the mobile energy storage system;
and if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state.
To achieve the above functions, the monitoring system includes:
the first monitoring unit is used for controlling the inverted switch to switch on the DC/DC converter and the energy storage battery when the state of the movable energy storage system is an operation state, and sending a fourth control instruction to the DC/DC converter; at the moment, the energy storage battery supplies power for external load, and the photovoltaic cell 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 inverted switch to switch on the DC/DC converter and the uninterrupted power supply when the state of the movable energy storage system is in the off-state, and sending a control instruction to the DC/DC converter according to the 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 this time, the power supply of the internal load of the energy storage system is derived from the storage battery and the photovoltaic cell, the electric quantity of the energy storage battery is not consumed, the electric quantity of the energy storage battery is saved, the photovoltaic cell can charge the storage battery, and the service time of the internal load is prolonged.
The second monitoring unit of the monitoring system 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 battery is larger than the power of the load and the charge state of the storage battery is larger 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 battery is larger than the power of the load and the charge state of the storage battery is smaller 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 smaller than the power of the load and the charge state 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 smaller than the power of the load and the charge state of the storage battery is smaller than 10%.
In an embodiment of the present application, 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 communicating the 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 stop the discharge 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 is a DC/DC converter with an MPPT function, so that the purpose of adjusting the output power of the photovoltaic cell to be the maximum output power can be achieved; the default state of the flyback switch is to turn on the uninterruptible power supply and the DC/DC converter.
The application provides a control method of a movable energy storage system powered by light and storage in a combined mode, which comprises the following steps:
controlling a reversing switch to switch on the energy storage battery and the DC/DC converter according to the state of the movable energy storage system, or switching on an uninterruptible power supply and the DC/DC converter;
and if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state.
In an embodiment of the present application, as shown in fig. 2, the controlling the inverted switch to switch on the energy storage battery and the DC/DC converter or to switch on the uninterruptible power supply and the DC/DC converter according to the state of the mobile energy storage system includes:
when the state of the movable energy storage system is an operation state, the monitoring system controls the back-off 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 state of the movable energy storage system is in an off-line state, the monitoring system controls the back-off switch to switch on the DC/DC converter and the uninterrupted power supply, and sends a control instruction to the DC/DC converter according to the 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 a control command to the DC/DC converter according to the comparison result of 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 charge state 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 charge state 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 charge state of the storage battery is more than or equal to 10%, the monitoring system sends a fourth 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 charge state of the storage battery is smaller 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, regulating the output power of the photovoltaic cell to be the maximum output power, and switching on the storage battery;
when the DC/DC converter receives the second control instruction, regulating the output power of the photovoltaic cell to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is regulated to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, regulating the output power of the photovoltaic cell to be the maximum output power.
In summary, the application provides a mobile energy storage system with combined light and storage power supply and a control method thereof, which comprises a mobile container, a photovoltaic cell arranged outside the mobile container, and an energy storage battery, 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 mobile container; when the mobile energy storage system is in shutdown, the photovoltaic cells and the storage batteries which are arranged in the mobile energy storage system supply power to the internal load, so that the electric energy of the energy storage battery is not consumed; when the mobile energy storage system operates, the photovoltaic cell can charge the energy storage battery, so that the power supply time of the energy storage battery is prolonged.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 aspects of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the application without departing from the spirit and scope of the application, which is intended to be covered by the claims.

Claims (9)

1. A mobile energy storage system for optical storage and combined power supply, characterized in that the mobile energy storage system comprises: the device comprises a movable container, a photovoltaic cell arranged outside the movable container, an energy storage battery, 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 battery, the energy storage converter control loop, the uninterruptible power supply, the storage battery, the reverse switch, the DC/DC converter and the monitoring system 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 inverted switch is connected with the energy storage battery, the uninterruptible power supply and the DC/DC converter, and the DC/DC converter is connected with the photovoltaic cell;
the uninterruptible power supply comprises a direct current end, an alternating current input end and an alternating current output end, wherein the direct current end of the uninterruptible power supply is respectively connected with the inverted 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 loop and the monitoring system;
the monitoring system is used for controlling the reversing switch to be connected with the energy storage battery and the DC/DC converter according to the state of the mobile energy storage system, or connected with the uninterrupted power supply and the DC/DC converter;
if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state;
the monitoring system includes:
the first monitoring unit is used for controlling the inverted switch to switch on the DC/DC converter and the energy storage battery when the state of the movable energy storage system is an operation state, and sending a fourth control instruction to the DC/DC converter;
the second monitoring unit is used for controlling the inverted switch to switch on the DC/DC converter and the uninterrupted power supply when the state of the movable energy storage system is in the off-state, and sending a control instruction to the DC/DC converter according to the 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.
2. The mobile energy storage system of claim 1, wherein said 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 battery is larger than the power of the load and the charge state of the storage battery is larger 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 battery is larger than the power of the load and the charge state of the storage battery is smaller 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 smaller than the power of the load and the charge state 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 smaller than the power of the load and the charge state of the storage battery is smaller than 10%.
3. A mobile energy storage system for combined light and power supply as defined in claim 2, 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 communicating the 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 stop the discharge 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.
4. A mobile energy storage system for combined light and power supply as defined in claim 1, wherein said DC/DC converter is an MPPT-capable DC/DC converter.
5. A mobile energy storage system for combined light and power supply as defined in claim 1, wherein said inverter switch is default to switch on said uninterruptible power supply and DC/DC converter.
6. A method of controlling a mobile energy storage system powered by a combination of light and storage as claimed in any one of claims 1 to 5, said method comprising:
controlling a reversing switch to switch on the energy storage battery and the DC/DC converter according to the state of the movable energy storage system, or switching on an uninterruptible power supply and the DC/DC converter;
and if the energy storage battery is in a discharging mode or a charging mode, the state of the movable energy storage system is an operating state, otherwise, the state of the movable energy storage system is an off-line state.
7. The method of claim 6, wherein controlling the backcut switch to turn on the energy storage battery and the DC/DC converter or to turn on the uninterruptible power supply and the DC/DC converter based on the state of the mobile energy storage system comprises:
when the state of the movable energy storage system is an operation state, the monitoring system controls the back-off 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 state of the movable energy storage system is in an off-line state, the monitoring system controls the back-off switch to switch on the DC/DC converter and the uninterrupted power supply, and sends a control instruction to the DC/DC converter according to the 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.
8. The method of claim 7, wherein the sending a control command to the DC/DC converter based on a 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 charge state 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 charge state 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 charge state of the storage battery is more than or equal to 10%, the monitoring system sends a fourth 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 charge state of the storage battery is smaller than 10%, the monitoring system sends a third control instruction to the DC/DC converter.
9. The method of claim 8, wherein when the first control command is received by the DC/DC converter, adjusting the output power of the photovoltaic cell to a maximum output power and turning on the battery;
when the DC/DC converter receives the second control instruction, regulating the output power of the photovoltaic cell to be the load power;
when the DC/DC converter receives the third control instruction, the photovoltaic cell is regulated to be in a discharge stopping mode;
and when the DC/DC converter receives the fourth control instruction, regulating the output power of the photovoltaic cell to be the maximum output power.
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