WO2023000581A1 - Procédé et dispositif de commande de charge pour une alimentation en énergie sans coupure pour un nouveau système de génération d'énergie électrique - Google Patents

Procédé et dispositif de commande de charge pour une alimentation en énergie sans coupure pour un nouveau système de génération d'énergie électrique Download PDF

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Publication number
WO2023000581A1
WO2023000581A1 PCT/CN2021/135654 CN2021135654W WO2023000581A1 WO 2023000581 A1 WO2023000581 A1 WO 2023000581A1 CN 2021135654 W CN2021135654 W CN 2021135654W WO 2023000581 A1 WO2023000581 A1 WO 2023000581A1
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WIPO (PCT)
Prior art keywords
current moment
power
charging
power supply
storage device
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PCT/CN2021/135654
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English (en)
Chinese (zh)
Inventor
胡欣
黄詹江勇
陈仲清
Original Assignee
科华数据股份有限公司
漳州科华电气技术有限公司
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Publication of WO2023000581A1 publication Critical patent/WO2023000581A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—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 for AC powered loads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

Definitions

  • the present application belongs to the technical field of uninterruptible power supplies, and in particular relates to a charging control method and device for uninterruptible power supplies of new energy power generation systems.
  • new energy power generation is an important source of electric energy.
  • new energy power generation systems are usually combined with UPS (Uninterruptible Power System, uninterruptible power supply).
  • UPS Uninterruptible Power System, uninterruptible power supply.
  • the energy storage device in the UPS system can store part of the input electric energy when the electric energy is sufficient, as an emergency use, and can also improve the quality of power supply.
  • the purpose of this application is to provide a charging control method and device for an uninterruptible power supply of a new energy power generation system, so as to solve the problem of low utilization rate of new energy power generation electric energy.
  • the first aspect of the embodiment of this application provides a charging control method for an uninterruptible power supply of a new energy power generation system, including:
  • Data acquisition step obtain the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the charging parameters of the energy storage device in the uninterruptible power supply at the current moment; the input power is the power input to the uninterruptible power supply of the new energy power generation system;
  • Power calculation step subtract the input power from the maximum allowable power at the current moment to obtain the surplus power at the current moment;
  • Adjustment amount calculation step determine the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device;
  • Parameter determination step adjust the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment, and obtain the charging parameters of the energy storage device at the next moment.
  • the second aspect of the embodiment of the present application provides a charging control device for an uninterruptible power supply of a new energy power generation system, including:
  • the obtaining module is used to obtain the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the charging parameters of the energy storage device inside the uninterruptible power supply at the current moment; the input power is the power input to the uninterruptible power supply of the new energy power generation system;
  • the power calculation module is used to subtract the input power at the current moment from the maximum allowable power at the current moment to obtain the surplus power at the current moment;
  • An adjustment amount calculation module configured to determine the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device;
  • the parameter determination module is used to adjust the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment, so as to obtain the charging parameters of the energy storage device at the next moment.
  • the third aspect of the embodiments of the present application provides an uninterruptible power supply, which is used to implement the steps of the charging control method of the uninterruptible power supply of the new energy power generation system as described above.
  • the fourth aspect of the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it realizes the charging of the uninterruptible power supply for the new energy power generation system as described above The steps of the control method.
  • the charging control method for the uninterruptible power supply of the new energy power generation system includes: obtaining the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the charging parameters of the energy storage device in the uninterruptible power supply at the current moment ;
  • the input power is the power of the new energy power generation system input to the uninterruptible power supply;
  • the maximum allowable power at the current moment is subtracted from the input power at the current moment to obtain the surplus power at the present moment; based on the surplus power at the present moment and the energy storage
  • the device parameters determine the charging parameter adjustment amount of the energy storage device at the current moment; adjust the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment, and obtain the charging parameter of the energy storage device at the next moment.
  • the surplus electricity that has not been charged into the uninterruptible power supply energy storage device at the current moment can be accurately obtained, thereby changing the charging parameters at the next moment and improving The power generation utilization rate of the new energy power generation system.
  • Fig. 1 is the implementation flowchart of the charging control method for the uninterruptible power supply of the new energy power generation system provided by the embodiment of the present application;
  • Fig. 2 is the structural representation of the uninterruptible power supply provided by the embodiment of the present application.
  • Fig. 3 is a schematic structural diagram of a charging control device for an uninterruptible power supply of a new energy power generation system provided by an embodiment of the present application.
  • Fig. 1 shows the implementation flow chart of the charging control method for the uninterruptible power supply of the new energy power generation system provided by the embodiment of the present application, which is described in detail as follows:
  • Step 101 obtain the maximum allowable power and input power of the UPS at the current moment, and the charging parameters of the energy storage device inside the UPS at the current moment; the input power is the power input to the UPS by the new energy power generation system.
  • the front end of the uninterruptible power supply is connected to the new energy power generation system for obtaining electric energy generated by the new energy power generation system; the back end is connected to the load for outputting part of the electric energy obtained by the UPS to the load ;
  • the interior of the UPS also includes an energy storage device for storing part of the electrical energy acquired by the UPS, and outputting the stored electrical energy when necessary, wherein the energy storage device can be a battery.
  • the maximum allowable power of the uninterruptible power supply at the current moment indicates the maximum power that the uninterruptible power supply can obtain from the new energy power generation system, that is, the active power dispatch value of the new energy power generation system at the current moment.
  • the maximum allowable power depends on the ability of the devices in the UPS to withstand the current.
  • the input power of the uninterruptible power supply at the current moment represents the power actually obtained by the uninterruptible power supply from the new energy power generation system at the current moment, and is also equal to the sum of the power output to the load at the current moment and the power stored in the energy storage device.
  • the new energy power generation system in this embodiment may be a wind power system.
  • the front end of the uninterruptible power supply is connected to the wind power system for obtaining the electric energy generated by the wind power system.
  • the power input to the uninterruptible power supply is equal to the sum of the load power and the charging power. If the input power of the uninterruptible power supply is lower than the power required by the load, it will lead to inverter output protection; if the input power of the uninterruptible power supply is higher than the power required by the load, the excess electric energy needs to be stored in the internal storage of the uninterruptible power supply.
  • the charging power is calculated at this time to determine the charging method that maximizes the utilization rate of electric energy, and at the same time ensures the normal operation of the load.
  • step 102 the maximum allowable power at the current moment is subtracted from the input power at the current moment to obtain the surplus power at the current moment.
  • the input power at the current moment is subtracted from the maximum allowable power at the current moment, and the surplus power obtained represents the power that the UPS can still obtain and can be used to charge the energy storage device. Storing this surplus power in an energy storage device can improve the utilization rate of electric energy. If the surplus power at the current moment is not greater than 0, it means that the new energy power generation system has no redundant electric energy for the energy storage device to store at the current moment except for the UPS load and the energy storage device.
  • Step 103 Determine the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device.
  • the parameters of the energy storage device are used to reflect the charging properties of the energy storage device.
  • the parameters of the energy storage device may include the charging efficiency, maximum withstand current, and maximum withstand voltage of the energy storage device; charging status and charging rate.
  • Step 104 Adjust the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
  • the power generation of the new energy power generation system at each moment may be different, in order to ensure the utilization rate of electric energy at each moment, it is necessary to calculate the charging parameter adjustment amount at each moment in real time, and adjust the energy storage device real-time adjustment of charging parameters. If the charging parameter adjustment amount at the current moment is not greater than 0, the charging parameter will not be adjusted at the next moment.
  • the charging parameters include charging power; the energy storage device parameters include charging efficiency.
  • Determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device includes:
  • the first adjustment amount calculation formula is used to calculate the charging power adjustment amount of the energy storage device at the current moment.
  • the first adjustment amount calculation formula is:
  • Charge_Cur_Add 1 represents the charging power adjustment amount of the energy storage device at the current moment
  • P represents the surplus power at the current moment
  • ⁇ represents the charging efficiency
  • the charging efficiency represents the conversion efficiency of the energy storage device to charging electric energy
  • the surplus power is multiplied by the charging efficiency, and the result obtained represents the surplus power actually stored in the energy storage device at the current moment, that is, the energy storage device charging power adjustment.
  • the charging parameters include charging current; the parameters of the energy storage device include charging efficiency;
  • Determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device includes:
  • the charging current adjustment amount of the energy storage device at the current moment is calculated based on the second adjustment amount calculation formula, and the second adjustment amount calculation formula is:
  • Charge_Cur_Add 2 represents the charging current adjustment amount of the energy storage device at the current moment
  • P represents the surplus power at the current moment
  • ⁇ represents the charging efficiency
  • U_Bat represents the charging voltage of the energy storage device at the current moment.
  • the charging current adjustment amount of the energy storage device may be further determined. Specifically, the charging current adjustment amount of the energy storage device at the charging voltage at the current moment is calculated based on the charging power adjustment amount of the energy storage device and the charging voltage of the energy storage device at the current moment. Then, under the condition that the charging voltage remains unchanged, the charging current can be adjusted to realize the adjustment of the corresponding charging power.
  • the above step 101 includes:
  • Input_Power_Max represents the maximum allowable power of the UPS at the current moment
  • U1 represents the active input voltage of the UPS at the current moment
  • I1 represents the maximum allowable current of the UPS.
  • the maximum allowable power of the UPS at the current moment is the maximum allowable active power, and the maximum allowable power is determined based on the active input voltage of the UPS at the current moment and the maximum allowable current of the UPS.
  • the maximum allowable current of the UPS is related to the internal components of the UPS and is an inherent parameter.
  • obtaining the input power of the uninterruptible power supply at the current moment includes:
  • the active component of the three-phase input current and the active component of the three-phase input voltage of the uninterruptible power supply at the current moment are respectively extracted to obtain the active component of the input current and the active component of the input voltage of the uninterruptible power supply at the current moment;
  • the input power of the uninterruptible power supply at the current moment is calculated using the second power calculation formula, and the second power calculation formula is:
  • Input_Power_Curr represents the input power of the UPS at the current moment
  • U2 represents the active component of the input voltage
  • I2 represents the active component of the input current.
  • the method before determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameters of the uninterruptible power supply, the method further includes:
  • the surplus power at the current moment is subtracted from the margin for guaranteed load operation to obtain the surplus power for guaranteed load operation at the current moment.
  • the charging parameter adjustment amount of the energy storage device at the current moment is determined based on the surplus power at the current moment and the parameters of the energy storage device, including:
  • the charging parameter adjustment amount of the energy storage device at the current moment is determined based on the surplus power to ensure load operation at the current moment and the parameters of the energy storage device.
  • a margin to ensure load operation is also set, so as to ensure that the UPS can still supply power to the load normally after adjusting the charging parameters of the energy storage device.
  • the value of the margin to ensure load operation needs to be determined according to the actual situation.
  • the adjustment amount of the charging parameter needs to be determined based on the surplus power after subtracting the margin for ensuring the load operation.
  • the charging control method for the uninterruptible power supply of the new energy power generation system includes: obtaining the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the energy storage device in the uninterruptible power supply at the current time
  • the charging parameters at the moment; the input power is the power of the new energy power generation system input to the uninterruptible power supply; the maximum allowable power at the moment is subtracted from the input power at the moment to obtain the surplus power at the moment; the surplus power at the moment is based on
  • the power and the parameters of the energy storage device determine the charging parameter adjustment amount of the energy storage device at the current moment; adjust the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the energy storage device
  • the charging parameters at the next moment includes: obtaining the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the energy storage device in the uninterruptible power supply at the current time
  • the charging parameters at the moment; the input power is the
  • the surplus electricity that has not been charged into the uninterruptible power supply energy storage device at the current moment can be accurately obtained, thereby changing the charging parameters at the next moment and improving The power generation utilization rate of the new energy power generation system.
  • Fig. 3 shows a schematic structural diagram of the charging control device for the uninterruptible power supply of the new energy power generation system provided by the embodiment of the present application.
  • Fig. 3 shows a schematic structural diagram of the charging control device for the uninterruptible power supply of the new energy power generation system provided by the embodiment of the present application.
  • the details are as follows:
  • the charging control device 3 for the uninterruptible power supply of the new energy power generation system includes:
  • the obtaining module 31 is used to obtain the maximum allowable power and input power of the uninterruptible power supply at the current moment, and the charging parameters of the energy storage device inside the uninterruptible power supply at the current moment; the input power is the power of the new energy power generation system input to the uninterruptible power supply ;
  • the power calculation module 32 is used to subtract the input power at the current moment from the maximum allowable power at the present moment to obtain the surplus power at the present moment;
  • An adjustment amount calculation module 33 configured to determine the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device;
  • the parameter determination module 34 is configured to adjust the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment, so as to obtain the charging parameters of the energy storage device at the next moment.
  • the charging parameters include charging power; the parameters of the energy storage device include charging efficiency;
  • the adjustment calculation module 33 is specifically used for:
  • the first adjustment amount calculation formula is used to calculate the charging power adjustment amount of the energy storage device at the current moment.
  • the first adjustment amount calculation formula is:
  • Charge_Cur_Add 1 represents the charging power adjustment amount of the energy storage device at the current moment
  • P represents the surplus power at the current moment
  • ⁇ represents the charging efficiency
  • the charging parameters include charging current; the parameters of the energy storage device include charging efficiency;
  • the adjustment calculation module 33 is specifically used for:
  • the second adjustment amount calculation formula is used to calculate the charging current adjustment amount of the energy storage device at the current moment, and the second adjustment amount calculation formula is:
  • Charge_Cur_Add 2 represents the charging current adjustment amount of the energy storage device at the current moment
  • P represents the surplus power at the current moment
  • ⁇ represents the charging efficiency
  • U_Bat represents the charging voltage of the energy storage device at the current moment.
  • the acquisition module is specifically used for:
  • the maximum allowable power of the uninterruptible power supply at the current moment is calculated using the first power calculation formula, and the first power calculation formula is:
  • Input_Power_Max represents the maximum allowable power of the UPS at the current moment
  • U1 represents the active input voltage of the UPS at the current moment
  • I1 represents the maximum allowable current of the UPS.
  • the obtaining module 31 is specifically used for:
  • the active component of the three-phase input current and the active component of the three-phase input voltage of the uninterruptible power supply at the current moment are respectively extracted to obtain the active component of the input current and the active component of the input voltage of the uninterruptible power supply at the current moment;
  • the input power of the uninterruptible power supply at the current moment is calculated using the second power calculation formula, and the second power calculation formula is:
  • Input_Power_Curr represents the input power of the UPS at the current moment
  • U2 represents the active component of the input voltage
  • I2 represents the active component of the input current.
  • the power calculation module 32 is also used for:
  • the surplus power at the current moment is subtracted from the margin to ensure the operation of the load to obtain the guarantee at the current moment Surplus power for load operation;
  • the adjustment amount calculation module 33 is also used for:
  • the charging parameter adjustment amount of the energy storage device at the current moment is determined based on the surplus power to ensure load operation at the current moment and the parameters of the energy storage device.
  • the disclosed device/terminal and method may be implemented in other ways.
  • the device/terminal embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated module/unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments in the present application can also be completed by instructing related hardware through computer programs.
  • the computer programs can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps in the above-mentioned various method embodiments can be realized.
  • the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form.
  • the computer-readable storage medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM, Read-Only Memory ), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • electric carrier signal telecommunication signal and software distribution medium, etc.

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

Abstract

La présente demande est applicable au domaine technique des alimentations en énergie sans coupure, et fournit un procédé et un dispositif de commande de charge pour une alimentation en énergie sans coupure pour un nouveau système de génération d'énergie électrique. Le procédé consiste à : acquérir une énergie maximale admissible et une énergie d'entrée d'une alimentation en énergie sans coupure à un instant courant, et charger des paramètres d'un dispositif de stockage électrique dans l'alimentation en énergie sans coupure à l'instant courant ; soustraire l'énergie d'entrée à l'instant courant à partir de l'énergie maximale admissible à l'instant courant pour obtenir une énergie excédentaire à l'instant courant ; déterminer une quantité d'ajustement de paramètres de charge du dispositif de stockage électrique à l'instant courant sur la base de l'énergie excédentaire à l'instant courant et des paramètres de dispositif de stockage électrique ; et ajuster les paramètres de charge du dispositif de stockage électrique à l'instant courant sur la base de la quantité d'ajustement de paramètres de charge à l'instant courant pour obtenir les paramètres de charge du dispositif de stockage électrique à l'instant suivant. Selon la présente demande, en ajustant les paramètres de charge en temps réel, le taux d'utilisation d'énergie de génération d'énergie du nouveau système de génération d'énergie électrique peut être amélioré.
PCT/CN2021/135654 2021-07-19 2021-12-06 Procédé et dispositif de commande de charge pour une alimentation en énergie sans coupure pour un nouveau système de génération d'énergie électrique WO2023000581A1 (fr)

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