CN112271748A - Energy control method and device for mobile energy storage power supply - Google Patents
Energy control method and device for mobile energy storage power supply Download PDFInfo
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- 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
- H02J3/381—Dispersed generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- 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
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- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Engineering & Computer Science (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an energy control method and device for a mobile energy storage power supply, which comprises the following steps: the method comprises the steps of obtaining operation modes of a plurality of mobile energy storage power supplies, and determining a control source of each mobile energy storage power supply according to the operation modes; acquiring the operation mode of each mobile energy storage power supply; and when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management strategy. The energy control method for the mobile energy storage power supply realizes coordinated operation and energy management of the mobile energy storage power supply in a multi-scene multi-working-condition operation mode according to the operation modes of a plurality of energy management systems, an energy management strategy corresponding to a grid-connected and off-grid state and a peak clipping and valley filling control strategy; the problem of quickly constructing an energy management system can be solved when emergency parallel power supply is performed, and charging and discharging management can be efficiently and economically performed when the mobile energy storage power supply is idle; the comprehensive energy management requirement of the mobile energy storage power supply can be met.
Description
Technical Field
The invention relates to the technical field of mobile energy storage and mobile micro-grids, in particular to an energy control method and device for a mobile energy storage power supply.
Background
With the increasing dependence on electric power energy in modern society and the rapid increase of power consumption demand, the requirement on power supply quality is higher and higher, and the sudden power failure inevitably damages the normal life order of people and the normal operation of the society, so that the application of mobile energy storage is more and more widespread. However, when the plurality of independent mobile energy storages are used for actual emergency parallel power supply, how to quickly construct an energy management system in a networking manner is achieved, and the energy efficiency of an emergency power supply system formed by the plurality of mobile energy storages is improved; how to scientifically charge and discharge the management when the mobile energy storage is idle and realize the maximum economic benefit is a practical problem to be solved by the energy management in the mobile energy storage emergency power supply system.
An invention patent (201680003783.6) "energy management system" discloses an energy management system using power generated in a home environment, a factory, or the like, and aims to provide an energy management system capable of stabilizing output power of an inverter by power electronic control; the invention patent (201810835315.6) discloses an intelligent energy management system and a general management system, which aims to solve the problem that the supply energy of a power distribution network is not matched when an ultra-large batch of battery packs are charged and discharged. But does not solve the problem of how to realize the energy optimization of a plurality of mobile energy storages in parallel and the scientific and economic charge and discharge management when the mobile energy storages are idle.
Disclosure of Invention
The invention provides an energy control method and system for a mobile energy storage power supply, and aims to solve the problem of how to manage the mobile energy storage power supply.
In order to solve the above problem, according to an aspect of the present invention, there is provided an energy control method for a mobile energy storage power supply, the method including:
the method comprises the steps of obtaining operation modes of a plurality of mobile energy storage power supplies, and determining a control source of each mobile energy storage power supply according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end;
acquiring the operation mode of each mobile energy storage power supply; wherein the operation modes include: a manual mode and an automatic mode;
and when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management strategy.
Preferably, the determining the control source of each mobile energy storage power supply according to the operation mode includes:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end;
and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
Preferably, when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management policy includes:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
Preferably, the determining, by the control source of the mobile energy storage power source, a power control command according to a preset peak clipping and valley filling strategy includes:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
Preferably, wherein the method further comprises:
judging whether the power control instruction causes power out-of-limit or not; and if so, correcting the power control command, and otherwise, maintaining the power control command unchanged.
Preferably, wherein the method further comprises:
when the operation mode of the mobile energy storage power supply is the manual mode, the mobile energy storage power supply controls the energy according to the control instruction issued by the control source manually.
Preferably, wherein the energy management system comprises: the device comprises an analog input unit, an analog output unit, a digital input unit, a digital output unit, a control unit, a communication management unit and a human-computer interaction unit.
According to another aspect of the invention, there is provided an energy control device for a mobile energy storage power supply, the device comprising:
the control source determining module is used for acquiring the operation modes of the plurality of mobile energy storage power supplies and determining the control source of each mobile energy storage power supply according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end;
the operation mode acquisition module is used for acquiring the operation mode of each mobile energy storage power supply; wherein the operation modes include: a manual mode and an automatic mode;
and the energy control module is used for controlling energy by utilizing the control source of each mobile energy storage power supply according to a preset energy management strategy when the operation mode of the mobile energy storage power supply is an automatic mode.
Preferably, the control source determining module determines the control source of each mobile energy storage power source according to the operation mode, and includes:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end; and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
Preferably, when the operation mode of the mobile energy storage power supply is the automatic mode, the energy control module performs energy control by using a control source of each mobile energy storage power supply according to a preset energy management policy, and includes:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
Preferably, the determining, by the energy control module, the power control command according to a preset peak clipping and valley filling strategy by using the control source of the mobile energy storage power source includes:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
The invention provides an energy control method and device for a mobile energy storage power supply, which comprises the following steps: the method comprises the steps of obtaining operation modes of a plurality of mobile energy storage power supplies, and determining a control source of each mobile energy storage power supply according to the operation modes; acquiring the operation mode of each mobile energy storage power supply; and when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management strategy. The energy control method for the mobile energy storage power supply realizes coordinated operation and energy management of the mobile energy storage power supply in a multi-scene multi-working-condition operation mode according to the operation modes of a plurality of energy management systems, an energy management strategy corresponding to a grid-connected and off-grid state and a peak clipping and valley filling control strategy; the problem of quickly constructing an energy management system can be solved when emergency parallel power supply is performed, and charging and discharging management can be efficiently and economically performed when the mobile energy storage power supply is idle; the comprehensive energy management requirement of the mobile energy storage power supply can be met.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a flowchart of an energy control method 100 for a mobile energy storage power supply according to an embodiment of the present invention;
fig. 2 is an architecture diagram of an energy control system facing a mobile energy storage power supply according to an embodiment of the invention;
FIG. 3 is a control logic diagram for energy management based on a mode of operation according to an embodiment of the present invention;
FIG. 4 is a control logic diagram for energy management according to an operating mode according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating control of peak clipping and valley filling according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an energy management system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an energy control device 700 facing a mobile energy storage power supply according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of an energy control method 100 for a mobile energy storage power source according to an embodiment of the present invention. As shown in fig. 1, according to the energy control method for a mobile energy storage power supply provided by the embodiment of the present invention, coordinated operation and energy management of the mobile energy storage power supply in a multi-scene and multi-operating-condition operation mode are implemented according to operation modes of a plurality of energy management systems, an energy management strategy corresponding to a grid-connected and off-grid state, and a peak-clipping and valley-filling control strategy; the problem of quickly constructing an energy management system can be solved when emergency parallel power supply is performed, and charging and discharging management can be efficiently and economically performed when the mobile energy storage power supply is idle; the comprehensive energy management requirement of the mobile energy storage power supply can be met. In the energy control method 100 for the mobile energy storage power supply, which is provided by the embodiment of the invention, starting from step 101, the operation modes of a plurality of mobile energy storage power supplies are obtained in step 101, and the control source of each mobile energy storage power supply is determined according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end.
Preferably, the determining the control source of each mobile energy storage power supply according to the operation mode includes:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end;
and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
Fig. 2 is an architecture diagram of an energy control system for a mobile energy storage power supply according to an embodiment of the invention. As shown in fig. 2, each energy management system manages the start-stop and power/voltage control of one mobile energy storage power source. When each energy management system is set to run locally, the control source is a local energy management system, and the energy management system corresponding to the mobile energy storage power supply performs energy management, power control and voltage control; when the remote operation is set, the control source is an energy management system of the master station end, and the mobile energy storage power supply listens to a control instruction of the master station to perform energy management, power control and voltage control; wherein, the mobile energy storage power supply is placed on the mobile energy storage power supply vehicle. For example, if there are 4 mobile energy storage power supplies, if the local operation mode is adopted, the energy management system is used for controlling the mobile energy storage power supplies; if the mobile energy storage power supply is in a remote operation mode, the master station uniformly regulates and controls the starting, the stopping, the power output and the like of the 4 mobile energy storage power supplies.
FIG. 3 is a control logic diagram for energy management based on a mode of operation, according to an embodiment of the present invention. As shown in fig. 3, the readings are used for telemetering data to determine the state of the energy management system EMS, and if the state is remote, the monitoring is only performed locally, and the cloud scheduling management of the master station is not managed; if the local area is available, the respective shelter (namely the mobile energy storage power supply) is locally managed.
In step 102, acquiring an operation mode of each mobile energy storage power supply; wherein the operation modes include: manual mode and automatic mode.
In step 103, when the operation mode of the mobile energy storage power supply is the automatic mode, the control source of each mobile energy storage power supply is utilized to perform energy control according to a preset energy management strategy.
Preferably, when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management policy includes:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
Preferably, the determining, by the control source of the mobile energy storage power source, a power control command according to a preset peak clipping and valley filling strategy includes:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
Preferably, wherein the method further comprises:
judging whether the power control instruction causes power out-of-limit or not; and if so, correcting the power control command, and otherwise, maintaining the power control command unchanged.
Preferably, wherein the method further comprises:
when the operation mode of the mobile energy storage power supply is the manual mode, the mobile energy storage power supply controls the energy according to the control instruction issued by the control source manually.
In an embodiment of the present invention, determining an operation mode of each mobile energy storage power supply includes: manual mode and automatic mode, and energy control is performed according to the operation mode. If the operation mode of the mobile energy storage power supply is a manual mode, the energy management system only monitors, and the power instruction and the start-stop command are issued by a human-computer, and the mobile energy storage power supply controls the energy according to the control instruction manually issued by the control source. If the operation mode of the mobile energy storage power supply is an automatic mode, judging the grid-connected and off-grid state of the mobile energy storage power supply, and if the operation mode of the mobile energy storage power supply is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude value of the power grid side is within a preset voltage range so as to update the conversion of the mobile energy storage power supply into the grid-connected state; and otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state. In an embodiment of the invention, the predetermined voltage range is [085, 1.3] times the rated voltage of the grid. The preset voltage range can be set according to actual requirements, and is not limited to the above range.
And then, determining a control instruction by using the control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply. If the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control command by using a corresponding control source according to a preset peak clipping and valley filling strategy. The energy management system manages the mobile energy storage power supply to carry out peak clipping and valley filling, and energy is transmitted to a power grid during a load peak; and when the load is in a low valley, energy is absorbed from the power grid, and the peak-valley difference of the power grid is reduced. Meanwhile, when renewable energy sources such as photovoltaic energy, wind power energy and the like exist in the system, the stored energy can stabilize power fluctuation, and the renewable energy sources are utilized to the maximum extent to meet the requirement of system load. If the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting part of the mobile energy storage power supplies as a main power supply according to load requirements to maintain system voltage and frequency; or a part of the mobile energy storage power supply is selected to carry out energy transfer, so that the role of energy handling is played.
FIG. 4 is a control logic diagram for energy management according to an operating mode according to an embodiment of the present invention. As shown in fig. 4, the state of the energy management system is determined, and if the state is manual, the energy management system only monitors, and power instructions, start-stop commands and the like are issued by a human-machine; and if the grid connection is automatic, judging whether the energy storage system is connected to the grid or not. If not, issuing a starting command to the mobile energy storage power supply which is not connected to the grid; and if the grid connection is realized, calculating the required power by utilizing a peak clipping and valley filling sub-process, and adjusting according to the required power. If not, issuing a starting command and directly ending; the peak clipping and valley filling sub-process is effective only when the energy storage system is connected to the grid, and the peak clipping and valley filling sub-process can be started if the energy storage system is judged to be connected to the grid in the next cycle.
Preferably, the determining, by the control source of the mobile energy storage power source, a power control command according to a preset peak clipping and valley filling strategy includes:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
Preferably, wherein the method further comprises:
judging whether the power control instruction causes power out-of-limit or not; and if so, correcting the power control command, and otherwise, maintaining the power control command unchanged.
Fig. 5 is a flowchart illustrating a control procedure for peak clipping and valley filling according to an embodiment of the present invention. As shown in fig. 5, the control flow of the peak clipping and valley filling strategy includes:
the first step is as follows: determining the maximum charge and discharge power allowed by energy storage according to the running state of the mobile energy storage power supply vehicle and the system reserved capacity (0-100% of the rated power of the mobile energy storage power supply vehicle);
the second step is that: and reading a system clock, determining the power required by the system according to the current time period, and finally determining the energy storage and charge and discharge instructions of the shelter. If the current time is the valley electricity price time period, the demand power is charging power, the stored energy is charged by constant power, the stored energy is not discharged and is not charged after the SOC reaches the upper limit, and the power instruction of the lower shelter is 0; if the current time is the peak electricity price time period, the demand power is the discharge power; energy storage is not discharged and not charged in the period of flat electricity price, and the active instruction is 0.
The third step: and judging whether the obtained energy storage power instruction causes power out-of-limit, if so, correcting the power instruction, and otherwise, keeping the power instruction unchanged.
Preferably, wherein the energy management system comprises: the device comprises an analog input unit, an analog output unit, a digital input unit, a digital output unit, a control unit, a communication management unit and a human-computer interaction unit.
Fig. 6 is a schematic structural diagram of an energy management system according to an embodiment of the present invention. As shown in fig. 6, the energy management system for a mobile energy storage power supply according to the embodiment of the present invention includes: the device comprises an analog input unit, an analog output unit, a digital input unit, a digital output unit, a control unit, a protection unit, a communication management unit and a human-computer interaction interface. The analog input unit is responsible for system side alternating voltage and current sampling, energy storage PCS branch three-phase voltage and current sampling, direct current side voltage sampling and the like; the analog quantity output unit is responsible for outputting the internal parameters of the system in an analog quantity mode, so that the observation of an oscilloscope is facilitated; the digital output unit is responsible for switching control, synchronous signal control, fault/alarm/running state output and the like of a system side branch, a PCS energy storage branch and a load side branch; the digital input unit is used for receiving switch position signals, emergency stop input and the like; the control unit is responsible for completing the control and regulation functions of the system; the protection unit is responsible for the line protection of each branch of the system; the communication management unit provides communication interfaces with the power module, the battery BMS, the human-computer interface and the master station, and has a communication expansion function and is used for multi-machine parallel connection, diesel engine matching or other functions of the system; the man-machine interaction interface has friendly man-machine interaction functions, including remote regulation, remote measurement, remote signaling, remote control, wave recording and the like; and the master station is used as the highest-level command to carry out energy management. An energy management system can be configured in the vehicle where each mobile energy storage power supply is located, an energy management system is also configured in the master station, and the energy management system is communicated with the energy management system of each mobile energy storage power supply vehicle so as to optimally manage the energy of the whole mobile energy storage power supply vehicle.
The method can realize coordinated operation and energy management of the mobile energy storage power supply in a multi-scene and multi-working-condition operation mode, and meets the comprehensive management requirement of a mobile energy storage power supply network.
Fig. 7 is a schematic structural diagram of an energy control device 700 facing a mobile energy storage power supply according to an embodiment of the present invention. As shown in fig. 7, an energy control apparatus 700 facing a mobile energy storage power supply according to an embodiment of the present invention includes: a control source determination module 701, an operation mode acquisition module 702, and an energy control module 703.
Preferably, the control source determining module 701 is configured to obtain operation modes of a plurality of mobile energy storage power supplies, and determine a control source of each mobile energy storage power supply according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end.
Preferably, the control source determining module 701, determining the control source of each mobile energy storage power source according to the operation mode, includes:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end; and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
Preferably, the operation mode acquiring module 702 is configured to acquire an operation mode of each mobile energy storage power supply; wherein the operation modes include: manual mode and automatic mode.
Preferably, the energy control module 703 is configured to, when the operation mode of the mobile energy storage power supply is the automatic mode, perform energy control according to a preset energy management policy by using a control source of each mobile energy storage power supply.
Preferably, when the operation mode of the mobile energy storage power supply is the automatic mode, the energy control module 703 performs energy control by using a control source of each mobile energy storage power supply according to a preset energy management policy, including:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
Preferably, the determining, by the energy control module 703, a power control command according to a preset peak clipping and valley filling strategy by using the control source of the mobile energy storage power source includes:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
The energy control apparatus 700 facing a mobile energy storage power supply according to an embodiment of the present invention corresponds to the energy control method 100 facing a mobile energy storage power supply according to another embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
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. An energy control method for a mobile energy storage power supply is characterized by comprising the following steps:
the method comprises the steps of obtaining operation modes of a plurality of mobile energy storage power supplies, and determining a control source of each mobile energy storage power supply according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end;
acquiring the operation mode of each mobile energy storage power supply; wherein the operation modes include: a manual mode and an automatic mode;
and when the operation mode of the mobile energy storage power supply is an automatic mode, performing energy control by using the control source of each mobile energy storage power supply according to a preset energy management strategy.
2. The method of claim 1, wherein determining the control source of each mobile energy storage power source according to the operation mode comprises:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end;
and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
3. The method according to claim 1, wherein when the operation mode of the mobile energy storage power supply is an automatic mode, the energy control is performed by using the control source of each mobile energy storage power supply according to a preset energy management strategy, and the method comprises the following steps:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
4. The method according to claim 3, wherein the determining the power control command according to the preset peak clipping and valley filling strategy by the control source of the mobile energy storage power source comprises:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
5. The method of claim 4, further comprising:
judging whether the power control instruction causes power out-of-limit or not; and if so, correcting the power control command, and otherwise, maintaining the power control command unchanged.
6. The method of claim 1, further comprising:
when the operation mode of the mobile energy storage power supply is the manual mode, the mobile energy storage power supply controls the energy according to the control instruction issued by the control source manually.
7. The method of claim 1, wherein the energy management system comprises: the device comprises an analog input unit, an analog output unit, a digital input unit, a digital output unit, a control unit, a communication management unit and a human-computer interaction unit.
8. An energy control device for a mobile energy storage power supply, the device comprising:
the control source determining module is used for acquiring the operation modes of the plurality of mobile energy storage power supplies and determining the control source of each mobile energy storage power supply according to the operation modes; wherein the control source comprises: the energy management system of the master station end and the energy management system of the mobile energy storage power supply end;
the operation mode acquisition module is used for acquiring the operation mode of each mobile energy storage power supply; wherein the operation modes include: a manual mode and an automatic mode;
and the energy control module is used for controlling energy by utilizing the control source of each mobile energy storage power supply according to a preset energy management strategy when the operation mode of the mobile energy storage power supply is an automatic mode.
9. The apparatus of claim 8, wherein the control source determining module determines the control source of each mobile energy storage power source according to the operation mode, and comprises:
if a certain mobile energy storage power supply is in a local operation mode, determining that the control source of the mobile energy storage power supply is the energy management system of the corresponding mobile energy storage power supply end; one mobile energy storage power supply corresponds to an energy management system of one mobile energy storage power supply end; and if a certain mobile energy storage power supply is in a remote operation mode, determining that a control source of the mobile energy storage power supply is an energy management system of the master station end.
10. The apparatus of claim 8, wherein the energy control module performs energy control according to a preset energy management policy by using the control source of each mobile energy storage power supply when the operation mode of the mobile energy storage power supply is the automatic mode, and includes:
if the grid-connected state of the mobile energy storage power supply with the automatic operation mode is the off-grid state, issuing a grid-connected command to the mobile energy storage power supply through a control source of the mobile energy storage power supply when the three-phase voltage amplitude of the power grid side is within a preset voltage range so as to update the mobile energy storage power supply to be converted into the grid-connected state; otherwise, a grid connection command is not issued, and the mobile energy storage power supply is maintained in an off-grid state;
determining a control instruction by using a control source of each mobile energy storage power supply according to the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies, and sending the control instruction to the corresponding mobile energy storage power supply; if the current grid-connected and off-grid state of the plurality of mobile energy storage power supplies is a grid-connected state, determining a power control instruction by using a corresponding control source according to a preset peak clipping and valley filling strategy; if the grid-connected and off-grid state of the plurality of mobile energy storage power supplies is an off-grid state, selecting the mobile energy storage power supply as a main power supply according to load requirements to maintain system voltage and frequency; or the mobile energy storage power supply is selected for energy transfer.
11. The apparatus of claim 10, wherein the energy control module determines the power control command according to a preset peak clipping and valley filling strategy by using a control source of the mobile energy storage power source, and comprises:
determining the maximum charge and discharge power of the mobile energy storage power supply according to the current working state of the mobile energy storage power supply and the set reserved capacity;
reading a system clock, determining the required power of the mobile energy storage power supply according to the current system clock, and determining a power control instruction according to the required power; if the current system clock is determined to be the valley electricity price time period, determining that the power control instruction is charging power, charging the mobile energy storage power supply with constant power, determining that the power control instruction is 0 after the SOC reaches the upper limit, and stopping charging; if the current system clock is determined to be the peak electricity price time period, determining the power control command to be the discharging power; and if the previous flat price time interval is determined according to the current system clock, determining that the power control command is 0, and not performing charging and discharging operations on the mobile energy storage power supply.
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| CN117698487A (en) * | 2024-02-05 | 2024-03-15 | 四川智能建造科技股份有限公司 | Dynamic scheduling method for electric energy of mobile charging and storing vehicle |
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