CN112721708A - Optical storage and charging control method and device, optical storage and charging system and storage medium - Google Patents

Optical storage and charging control method and device, optical storage and charging system and storage medium Download PDF

Info

Publication number
CN112721708A
CN112721708A CN202011471086.8A CN202011471086A CN112721708A CN 112721708 A CN112721708 A CN 112721708A CN 202011471086 A CN202011471086 A CN 202011471086A CN 112721708 A CN112721708 A CN 112721708A
Authority
CN
China
Prior art keywords
mode
energy storage
charging
bus
grade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011471086.8A
Other languages
Chinese (zh)
Inventor
刘霞
林宝伟
赖元华
南树功
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202011471086.8A priority Critical patent/CN112721708A/en
Publication of CN112721708A publication Critical patent/CN112721708A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/51—Photovoltaic means
    • 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
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Abstract

The invention discloses a light storage and charging control method and device, a light storage and charging system and a storage medium, wherein the method comprises the following steps: detecting the actually measured voltage value of the direct current bus in real time; calculating a difference value between a reference voltage value and an actually measured voltage value of the direct current bus as a bus offset; and controlling the running state of each energy storage element according to the bus offset and the preset state grade. The scheme of the invention solves the problem that the service life of the battery is influenced due to larger voltage and power fluctuation in the existing optical storage and charging system, and achieves the technical effects of ensuring the stable operation of the optical storage and charging system and prolonging the service life of the battery.

Description

Optical storage and charging control method and device, optical storage and charging system and storage medium
Technical Field
The invention belongs to the technical field of equipment control, and particularly relates to an optical storage and charging control method and device, an optical storage and charging system and a storage medium.
Background
With the continuous development of new energy vehicles, the requirements for low carbon, intellectualization and informatization of the vehicles are higher and higher, and more charging devices and places of the new energy vehicles can appear, for example: light storage and charging parking lot.
The existing light storage and charging parking lot generally comprises a photovoltaic power generation system, an energy storage system, a charging pile and a related control system, and the energy storage system of the light storage and charging parking lot generally uses an energy type lead-acid storage battery or a lithium battery.
However, in the application of the light storage and charging parking lot, a photovoltaic micro source with large fluctuation and a charging pile load with rapid change exist in the system, the system generates high-frequency power fluctuation due to the problems, and the storage battery pack has the problem of overcharge or overdischarge due to rapid power fluctuation, so that the service life of the storage battery is influenced.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The present invention aims to provide a method and an apparatus for controlling optical storage and charging, an optical storage and charging system, and a storage medium, so as to solve the problem that the fluctuation of voltage and power in the optical storage and charging system in the prior art is large, which affects the service life of a battery.
The invention provides a light storage and charging control method, which comprises the following steps:
detecting the actually measured voltage value of the direct current bus in real time;
calculating a difference value between a reference voltage value and an actually measured voltage value of the direct current bus as a bus offset;
and controlling the running state of each energy storage element according to the bus offset and the preset state grade.
Further, according to the bus offset and the preset state grade, the operation state of each energy storage element is controlled, and the method comprises the following steps:
calling a corresponding relation between a preset state grade and a control mode;
determining a grade at which the bus bar offset is located;
and calling a control mode corresponding to the determined grade to control the running state of each energy storage element.
Further, invoking a control mode corresponding to the determined grade to control the operation state of each energy storage element, including:
calling a control mode corresponding to the determined grade to determine the operating state of each energy storage element;
and the operating state of each energy storage element is controlled by the micro-source converter connected with each energy storage element.
Further, the energy storage element comprises at least one of: the system comprises a photovoltaic, a storage battery, a super capacitor, a charging pile and a direct current load; correspondingly, the micro-source converter connected with the energy storage element comprises at least one of the following components: the system comprises photovoltaic DC/DC, storage battery DC/DC, super capacitor DC/DC, charging pile DC/DC and direct current load DC/DC.
Further, the preset state level includes at least one of: the energy storage and discharge regulation method comprises a limit operation energy excess mode, an energy storage and charge regulation mode, an energy optimal utilization mode, an energy storage and discharge regulation mode and a limit operation energy shortage mode.
Further, invoking a control manner corresponding to the determined level, and determining the operating state of each energy storage element comprises:
under the condition that the state grade is the mode that the processing grade is the limit operation energy surplus, photovoltaic voltage-stabilizing operation, storage battery maximum current charging, charging pile constant current charging and super capacitor quit operation;
under the condition that the state grade is in an energy storage charging regulation mode, the photovoltaic system runs in a maximum power point tracking mode, runs in a storage battery droop mode, charges a charging pile in a constant current mode, and the super capacitor quits running;
under the condition that the state grade is an energy optimal utilization mode, the photovoltaic system runs in a maximum power point tracking mode, the super capacitor and the storage battery run in a frequency division controlled hybrid energy storage mode, and the charging pile is charged in a constant current mode;
under the condition that the state grade is in an energy storage discharge regulation mode, the photovoltaic system runs in a maximum power point tracking mode, a super capacitor is put forward to run, and a storage battery operates in a droop mode;
under the condition that the state grade is in the mode of limited running energy shortage, the photovoltaic runs in a maximum power point tracking mode, the super capacitor operates in a promotion mode, and the storage battery is charged with the maximum current.
In accordance with the above method, another aspect of the present invention provides a light storage and charge control apparatus, including:
the detection module is used for detecting the actually measured voltage value of the direct current bus in real time;
the calculating module is used for calculating the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset;
and the control module is used for controlling the running state of each energy storage element according to the bus offset and the preset state grade.
Further, the control module includes:
the calling unit is used for calling the corresponding relation between the preset state grade and the control mode;
the determining unit is used for determining the grade of the bus offset;
and the control unit is used for calling a control mode corresponding to the determined grade and controlling the running state of each energy storage element.
In accordance with the above apparatus, a further aspect of the present invention provides a terminal, including: the light charging and storing system described above.
In accordance with the above method, a further aspect of the present invention provides a storage medium comprising: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the light storage and charging control method by the processor.
In accordance with the above method, a further aspect of the present invention provides a terminal, including: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the optical storage and charging control method.
Therefore, according to the scheme of the invention, the actually measured voltage value of the direct current bus is detected in real time, the difference value between the reference voltage value and the actually measured voltage value of the direct current bus is calculated to be used as the bus offset, and then the running state of each energy storage element is controlled according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a light storage and charging control method according to the present invention;
fig. 2 is an architecture diagram of the light storage and charging parking lot system of the present invention;
FIG. 3 is a schematic view of the status level of the light charging system of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a light storage and charge control device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, a method for controlling optical storage and charging is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The light storage and charge control method may include:
step 101: detecting the actually measured voltage value of the direct current bus in real time;
step 102: calculating a difference value between a reference voltage value and an actually measured voltage value of the direct current bus as a bus offset;
step 103: and controlling the running state of each energy storage element according to the bus offset and the preset state grade.
In the above embodiment, the actually measured voltage value of the dc bus is detected in real time, and the difference between the reference voltage value and the actually measured voltage value of the dc bus is calculated as the bus offset, and then the operating state of each energy storage element is controlled according to the bus offset and the preset state level. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
Specifically, when the operating state of each energy storage element is controlled according to the bus offset and the preset state grade, the corresponding relation between the preset state grade and the control mode can be called; determining a grade at which the bus bar offset is located; and calling a control mode corresponding to the determined grade to control the running state of each energy storage element. That is, a plurality of state levels may be set, different state levels may be set, the operating state of each energy storage element is different, and after the state level is determined, the energy storage elements are operated according to the operating mode corresponding to the state level.
When the method is realized, a control mode corresponding to the determined grade can be called to determine the running state of each energy storage element; and the operating state of each energy storage element is controlled by the micro-source converter connected with each energy storage element. That is, a micro-source converter is provided to realize control of each energy storage element.
For example, the energy storage element may include, but is not limited to, at least one of: the system comprises a photovoltaic, a storage battery, a super capacitor, a charging pile and a direct current load; accordingly, the energy storage element connected micro-source converter may include, but is not limited to, at least one of: the system comprises photovoltaic DC/DC, storage battery DC/DC, super capacitor DC/DC, charging pile DC/DC and direct current load DC/DC.
At the time of the preset state level, the preset state level may include, but is not limited to, at least one of: the energy storage and discharge regulation method comprises a limit operation energy excess mode, an energy storage and charge regulation mode, an energy optimal utilization mode, an energy storage and discharge regulation mode and a limit operation energy shortage mode.
Specifically, invoking a control manner corresponding to the determined level, and determining the operating state of each energy storage element may include:
under the condition that the state grade is the mode that the processing grade is the limit operation energy surplus, photovoltaic voltage-stabilizing operation, storage battery maximum current charging, charging pile constant current charging and super capacitor quit operation;
under the condition that the state grade is in an energy storage charging regulation mode, the photovoltaic system runs in a maximum power point tracking mode, runs in a storage battery droop mode, charges a charging pile in a constant current mode, and the super capacitor quits running;
under the condition that the state grade is an energy optimal utilization mode, the photovoltaic system runs in a maximum power point tracking mode, the super capacitor and the storage battery run in a frequency division controlled hybrid energy storage mode, and the charging pile is charged in a constant current mode;
under the condition that the state grade is in an energy storage discharge regulation mode, the photovoltaic system runs in a maximum power point tracking mode, a super capacitor is put forward to run, and a storage battery operates in a droop mode;
under the condition that the state grade is in the mode of limited running energy shortage, the photovoltaic runs in a maximum power point tracking mode, the super capacitor operates in a promotion mode, and the storage battery is charged with the maximum current.
The above method is described below with reference to a specific example, however, it should be noted that the specific example is only for better describing the present application and is not to be construed as limiting the present application.
In the light storage and charging parking lot system, due to the existence of photovoltaic micro sources with large fluctuation and charging pile loads with rapid change, the system generates high-frequency power fluctuation, and the rapid power fluctuation can cause the overcharge and over-discharge of the storage battery pack, so that the service life of the storage battery is influenced. In the embodiment, energy storage elements with high power density, such as a super capacitor, a flywheel battery and the like, are added in the system to respond to high-frequency fluctuation in the system, so that the overcharge and the over-discharge of the storage battery are avoided, the charging process of the storage battery is optimized, and the service life of the storage battery is prolonged. Furthermore, by utilizing the complementary characteristics of large power density of the super capacitor and large energy density of the storage battery, the high and medium frequency power fluctuation generated by the randomness of the power generation of the photovoltaic system and the low frequency power fluctuation generated by the load switching of the direct current bus of the optical storage and charging parking lot system are responded, and the hybrid energy storage system is coordinately controlled to maintain the stability of the direct current bus.
Specifically, power fluctuation in the optical storage and charging parking lot system is equivalent to voltage fluctuation, hierarchy is divided to form hierarchical control, different energy storage elements are started to respond in different hierarchies, and the hybrid energy storage system is coordinately controlled to maintain stability of the direct-current bus. As shown in fig. 2, which is an architecture diagram of the optical storage and charging parking lot system, whether power in the system is balanced is reflected by a dc bus voltage, and when considering that modes of system operation are different, corresponding power balance points are different, the dc bus voltage reached when the system is stable is also different.
Therefore, information exchange between the sources is realized by using the direct-current bus voltage as a signal, voltage thresholds of the converters are set, and control strategies of the micro-source converters (namely, DC \ DC in fig. 2) are designed on different voltage layers, so that the input and output power of the micro-source converters is changed, and the balance of the bus voltage is maintained.
Specifically, the micro-source converter may include:
1) photovoltaic (PV) DC/DC, which can generate power in a voltage constant voltage mode to maintain stable bus voltage, and can also generate power in an MPPT (maximum power point tracking) mode to output the photovoltaic power generation at the maximum power;
2) a battery DC/DC having a BMS (Battery management System) for controlling and managing charging and discharging of the battery;
3) the super capacitor DC/DC is used for controlling the charging and discharging of the super capacitor;
4) the charging pile DC/DC is used for controlling the charging control of the charging pile;
5) and the DC/DC of the DC load is converted into power supply voltage required by the DC load, and the power is supplied to the DC load for use.
Specifically, the reference voltage of the dc bus voltage can be designed to be UdcAccording to the offset DeltaU of the busbardc＝Udc-UrefFive levels are designed, as shown in fig. 3, five operation states of serious power shortage, insufficient power, power balance, excessive power and serious power surplus of the system are sequentially corresponded:
1) first tier, limit operation, energy surplus:
the bus voltage is raised to 1.03U due to the surplus of power in the systemdcTo 1.05UdcIn the meantime. In this state, the photovoltaic power generation system maintains the bus voltage stable by adopting a direct current bus voltage Constant Voltage (CVC) voltage stabilization mode, the storage battery is charged with the maximum current, and in order to protect the storage battery and set the maximum charging current for the storage battery, the charging pile module charges for the constant current, and the super capacitor stops running because the power limit of the super capacitor is reached at the moment.
Namely, the system hierarchical control refers to the upper-layer control of the whole system, the switching-out and the switching-in of the super capacitor are completed by the fact that an upper-layer control system issues an instruction to the DC/DC, the operation mode of the photovoltaic system, the charging and discharging of the storage battery and the operation mode of the charging pile are completed by the fact that the upper-layer control system sends out a corresponding instruction according to a system direct-current bus voltage signal.
2) Second floor, energy storage charging altitude mode:
at this time, the bus voltage is at 1.01UdcTo 1.03UdcIn the meantime, the power in the system is excessive, the photovoltaic power generation system operates in a Maximum Power Point Tracking (MPPT) control mode, and the storage battery operatesAnd in the droop mode, the charging current is adjusted at any time to maintain the power balance in the system, and the charging pile module is used for constant-current charging. At this time, the super capacitor is removed from operation in order to keep the performance of the super capacitor good.
3) Third, energy optimal utilization:
at this time,. DELTA.Udc≤±1％UdcAnd the energy in the system can be maintained stably to achieve optimal utilization, at the moment, when the photovoltaic runs in an MPPT mode, the super capacitor is put into use and coacts with the storage battery to form a frequency division controlled hybrid energy storage system, so that the power fluctuation of each frequency band in the direct current micro-grid is stabilized, the stability of the system is maintained, and the charging pile module is used for constant current charging.
4) Fourth layer, energy storage discharge regulation mode:
at this time, the bus voltage is at 0.97UdcTo 0.99UdcMeanwhile, the energy in the system is slightly insufficient, at the moment, the photovoltaic system still operates in the MPPT mode, the super capacitor stops operating in order to protect the super capacitor, and the storage battery adopts droop control to adjust the discharge current of the storage battery and maintain the power balance in the system.
5) Fifth, limit operation, energy deficit:
the bus voltage is at 0.95Udc0.97UdcMeanwhile, the energy in the system is seriously insufficient, at the moment, the photovoltaic operation is in the MPPT mode, the energy is transmitted to the system as far as possible, the storage battery uses the maximum current to discharge into the system, the super capacitor reaches the power limit, and the operation is quitted.
After a large number of tests, the technical scheme of the embodiment is adopted to detect the actually measured voltage value of the direct current bus in real time, calculate the difference between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset, and then control the running state of each energy storage element according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
According to the embodiment of the invention, a light storage and charging control device corresponding to the light storage and charging control method is also provided. Referring to fig. 4, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The light charge-storage control device may include:
the detection module 401 is configured to detect an actually measured voltage value of the dc bus in real time;
a calculating module 402, configured to calculate a difference between a reference voltage value and an actually measured voltage value of the dc bus as a bus offset;
and a control module 403, configured to control an operating state of each energy storage element according to the bus offset and a preset state level.
In one embodiment, the control module 403 may include: the calling unit is used for calling the corresponding relation between the preset state grade and the control mode; the determining unit is used for determining the grade of the bus offset; and the control unit is used for calling a control mode corresponding to the determined grade and controlling the running state of each energy storage element.
In one embodiment, the control unit may specifically invoke a control manner corresponding to the determined level to determine the operating state of each energy storage element; and the operating state of each energy storage element is controlled by the micro-source converter connected with each energy storage element.
In one embodiment, the energy storage element may include, but is not limited to, at least one of: the system comprises a photovoltaic, a storage battery, a super capacitor, a charging pile and a direct current load; accordingly, the energy storage element connected micro-source converter may include, but is not limited to, at least one of: the system comprises photovoltaic DC/DC, storage battery DC/DC, super capacitor DC/DC, charging pile DC/DC and direct current load DC/DC.
In one embodiment, the preset status level may include, but is not limited to, at least one of the following: the energy storage and discharge regulation method comprises a limit operation energy excess mode, an energy storage and charge regulation mode, an energy optimal utilization mode, an energy storage and discharge regulation mode and a limit operation energy shortage mode.
In one embodiment, the control unit may specifically perform photovoltaic voltage stabilization operation, maximum current charging of the storage battery, constant current charging of the charging pile, and exit from operation of the super capacitor when the state level is the processing level in the limit operation energy surplus mode; under the condition that the state grade is in an energy storage charging regulation mode, the photovoltaic system runs in a maximum power point tracking mode, runs in a storage battery droop mode, charges a charging pile in a constant current mode, and the super capacitor quits running; under the condition that the state grade is an energy optimal utilization mode, the photovoltaic system runs in a maximum power point tracking mode, the super capacitor and the storage battery run in a frequency division controlled hybrid energy storage mode, and the charging pile is charged in a constant current mode; under the condition that the state grade is in an energy storage discharge regulation mode, the photovoltaic system runs in a maximum power point tracking mode, a super capacitor is put forward to run, and a storage battery operates in a droop mode; under the condition that the state grade is in the mode of limited running energy shortage, the photovoltaic runs in a maximum power point tracking mode, the super capacitor operates in a promotion mode, and the storage battery is charged with the maximum current.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
After a large number of tests, the technical scheme of the invention and the technical scheme of the embodiment are adopted to detect the actually measured voltage value of the direct current bus in real time, calculate the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset, and then control the running state of each energy storage element according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
According to the embodiment of the invention, a terminal corresponding to the light storage and charge control device is also provided. The terminal may include: the light storage and charging control device is described above.
Since the processes and functions implemented by the terminal of this embodiment substantially correspond to the embodiments, principles, and examples of the apparatus shown in fig. 4, reference may be made to the related descriptions in the foregoing embodiments for details which are not described in detail in the description of this embodiment, and no further description is given here.
After a large number of tests, the technical scheme of the invention and the technical scheme of the embodiment are adopted to detect the actually measured voltage value of the direct current bus in real time, calculate the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset, and then control the running state of each energy storage element according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
According to an embodiment of the present invention, there is also provided a storage medium corresponding to the optical storage control method. The storage medium may include: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the light storage and charging control method by the processor.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 3, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
After a large number of tests, the technical scheme of the invention and the technical scheme of the embodiment are adopted to detect the actually measured voltage value of the direct current bus in real time, calculate the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset, and then control the running state of each energy storage element according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
According to the embodiment of the invention, a terminal corresponding to the optical storage and charging control method is also provided. The terminal can include: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the optical storage and charging control method.
Since the processing and functions implemented by the terminal of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 3, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
After a large number of tests, the technical scheme of the invention and the technical scheme of the embodiment are adopted to detect the actually measured voltage value of the direct current bus in real time, calculate the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset, and then control the running state of each energy storage element according to the bus offset and the preset state grade. Namely, the operating state of each energy storage element can be controlled according to the voltage condition detected in real time, so that the problem that the battery life is influenced due to the fact that the voltage and power fluctuation in the existing light storage charging system is large can be solved, the stable operation of the light storage charging system is guaranteed, and the technical effect of prolonging the service life of the battery is achieved.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (11)

1. A method for controlling optical charging, comprising:
detecting the actually measured voltage value of the direct current bus in real time;
calculating a difference value between a reference voltage value and an actually measured voltage value of the direct current bus as a bus offset;
and controlling the running state of each energy storage element according to the bus offset and the preset state grade.
2. The method of claim 1, wherein controlling the operating state of each energy storage element based on the bus offset and a predetermined state level comprises:
calling a corresponding relation between a preset state grade and a control mode;
determining a grade at which the bus bar offset is located;
and calling a control mode corresponding to the determined grade to control the running state of each energy storage element.
3. The method of claim 2, wherein invoking a control mode corresponding to the determined level to control the operating state of each energy storage element comprises:
calling a control mode corresponding to the determined grade to determine the operating state of each energy storage element;
and the operating state of each energy storage element is controlled by the micro-source converter connected with each energy storage element.
4. The method of claim 3, wherein the energy storage element comprises at least one of: the system comprises a photovoltaic, a storage battery, a super capacitor, a charging pile and a direct current load; correspondingly, the micro-source converter connected with the energy storage element comprises at least one of the following components: the system comprises photovoltaic DC/DC, storage battery DC/DC, super capacitor DC/DC, charging pile DC/DC and direct current load DC/DC.
5. The method of claim 4, wherein the preset status level comprises at least one of: the energy storage and discharge regulation method comprises a limit operation energy excess mode, an energy storage and charge regulation mode, an energy optimal utilization mode, an energy storage and discharge regulation mode and a limit operation energy shortage mode.
6. The method of claim 5, wherein invoking a control regime corresponding to the determined level, determining the operating state of each energy storage element comprises:
under the condition that the state grade is the mode that the processing grade is the limit operation energy surplus, photovoltaic voltage-stabilizing operation, storage battery maximum current charging, charging pile constant current charging and super capacitor quit operation;
under the condition that the state grade is in an energy storage charging regulation mode, the photovoltaic system runs in a maximum power point tracking mode, runs in a storage battery droop mode, charges a charging pile in a constant current mode, and the super capacitor quits running;
under the condition that the state grade is an energy optimal utilization mode, the photovoltaic system runs in a maximum power point tracking mode, the super capacitor and the storage battery run in a frequency division controlled hybrid energy storage mode, and the charging pile is charged in a constant current mode;
under the condition that the state grade is in an energy storage discharge regulation mode, the photovoltaic system runs in a maximum power point tracking mode, a super capacitor is put forward to run, and a storage battery operates in a droop mode;
under the condition that the state grade is in the mode of limited running energy shortage, the photovoltaic runs in a maximum power point tracking mode, the super capacitor operates in a promotion mode, and the storage battery is charged with the maximum current.
7. A light charging control device, comprising:
the detection module is used for detecting the actually measured voltage value of the direct current bus in real time;
the calculating module is used for calculating the difference value between the reference voltage value and the actually measured voltage value of the direct current bus as the bus offset;
and the control module is used for controlling the running state of each energy storage element according to the bus offset and the preset state grade.
8. The apparatus of claim 7, wherein the control module comprises:
the calling unit is used for calling the corresponding relation between the preset state grade and the control mode;
the determining unit is used for determining the grade of the bus offset;
and the control unit is used for calling a control mode corresponding to the determined grade and controlling the running state of each energy storage element.
9. A light charging and storage system, comprising: a light charging control device as claimed in any one of claims 7 to 8.
10. A storage medium having a plurality of instructions stored therein; the plurality of instructions for being loaded by a processor and for performing the method of light charging control according to any one of claims 1 to 6.
11. A terminal, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are stored by the memory and loaded and executed by the processor to perform the optical charging control method according to any one of claims 1 to 6.
CN202011471086.8A 2020-12-14 2020-12-14 Optical storage and charging control method and device, optical storage and charging system and storage medium Pending CN112721708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011471086.8A CN112721708A (en) 2020-12-14 2020-12-14 Optical storage and charging control method and device, optical storage and charging system and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011471086.8A CN112721708A (en) 2020-12-14 2020-12-14 Optical storage and charging control method and device, optical storage and charging system and storage medium

Publications (1)

Publication Number Publication Date
CN112721708A true CN112721708A (en) 2021-04-30

Family

ID=75599911

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011471086.8A Pending CN112721708A (en) 2020-12-14 2020-12-14 Optical storage and charging control method and device, optical storage and charging system and storage medium

Country Status (1)

Country Link
CN (1) CN112721708A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023130799A1 (en) * 2022-01-05 2023-07-13 珠海格力电器股份有限公司 Photovoltaic, energy storage, direct current and flexibility system and control method and apparatus therefor, and storage medium
CN116526445A (en) * 2023-05-10 2023-08-01 北京索英电气技术股份有限公司 Energy router

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181099B1 (en) * 1999-12-03 2001-01-30 General Electric Company Method and apparatus for correcting DC offset in a frequency to voltage converter and motor drive using the same
CN102931653A (en) * 2012-11-02 2013-02-13 浙江工业大学 Comprehensive coordination control method of wind-solar direct current micro-grid
CN104967112A (en) * 2015-06-26 2015-10-07 上海电力学院 Direct current micro-grid coordination control method of light storage electric car charging station
CN107681687A (en) * 2017-05-19 2018-02-09 许继电气股份有限公司 Distributed system bus Overvoltage suppressing control method and system based on energy storage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181099B1 (en) * 1999-12-03 2001-01-30 General Electric Company Method and apparatus for correcting DC offset in a frequency to voltage converter and motor drive using the same
CN102931653A (en) * 2012-11-02 2013-02-13 浙江工业大学 Comprehensive coordination control method of wind-solar direct current micro-grid
CN104967112A (en) * 2015-06-26 2015-10-07 上海电力学院 Direct current micro-grid coordination control method of light storage electric car charging station
CN107681687A (en) * 2017-05-19 2018-02-09 许继电气股份有限公司 Distributed system bus Overvoltage suppressing control method and system based on energy storage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023130799A1 (en) * 2022-01-05 2023-07-13 珠海格力电器股份有限公司 Photovoltaic, energy storage, direct current and flexibility system and control method and apparatus therefor, and storage medium
CN116526445A (en) * 2023-05-10 2023-08-01 北京索英电气技术股份有限公司 Energy router
CN116526445B (en) * 2023-05-10 2024-02-02 北京索英电气技术股份有限公司 Energy router

Similar Documents

Publication Publication Date Title
CN102270884B (en) Energy-storage system and control method thereof
US8938323B2 (en) Power storage system and method of controlling the same
Vasallo et al. Optimal sizing for UPS systems based on batteries and/or fuel cell
CN112510798B (en) Power distribution method of echelon battery hybrid energy storage system
Faisal et al. Fuzzy-based charging–discharging controller for lithium-ion battery in microgrid applications
JP2014124063A (en) Storage battery state of charge management device
CN112721708A (en) Optical storage and charging control method and device, optical storage and charging system and storage medium
CN112165109B (en) Plug-and-play grid-connected operation coordination control method and system for multi-type energy storage system
Zhang et al. Fast state-of-charge balancing control strategies for battery energy storage systems to maximize capacity utilization
KR20210032261A (en) System for heterogeneous power balancing using clustering, apparatus thereof and method thereof
CN117220384B (en) Current distribution method for parallel operation of batteries and battery parallel system
JP2023535099A (en) Charging and discharging device, battery charging and discharging method, and charging and discharging system
CN112886623A (en) Energy storage converter VSG mode energy management coordination control method and system
CN113937751B (en) Direct-current micro-grid group power coordination control method and system
CN115566756A (en) Battery system and method for balancing electric quantity between battery plug boxes
CN109560336B (en) Active maintenance method and system for vehicle-mounted power battery
CN111490555A (en) Bidirectional converter control method and device
CN112242709A (en) Hybrid energy storage capacity determination method with reliable load power supply of micro-grid system
Faisal et al. Real time implementation of fuzzy based charging-discharging controller for lithium-ion battery in microgrid applications
Jung et al. Grid-connected electric vehicles charger station based on lithium polymer battery energy storage system
KR102598680B1 (en) Uninterruptible power supply using recycled lithium ion battery
CN115021302B (en) Control method of megawatt hybrid energy storage device with electric energy quality regulation function
CN117048435B (en) Coordinated control method for power supply of multiple fuel cells and related device
KR20140058770A (en) Method and system for operation mode decision of power management system
Chen et al. Soc balance and economic dispatch using distributed cooperative control for distributed energy storage systems in dc microgrid applications

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210430

RJ01 Rejection of invention patent application after publication