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CN-121984065-A - Multi-device control method and optical storage and charging system

CN121984065ACN 121984065 ACN121984065 ACN 121984065ACN-121984065-A

Abstract

The application discloses a multi-device control method and an optical storage and filling system, and belongs to the field of optical storage systems. The multi-device control method comprises the steps of obtaining actual charge states of all devices and maximum power capacity corresponding to the devices, wherein the maximum power capacity comprises maximum outputtable power and maximum inputtable power, sequencing the multi-devices based on the actual charge states, and controlling the operation of the devices according to the maximum power capacity corresponding to the sequenced devices. According to the multi-device control method, the power consumption requirements of the internal loads of all devices can be guaranteed without taking power from a power grid, the power consumption cost of the network side is reduced, the charge balance among the multiple devices can be improved, the utilization rate of surplus energy storage capacity is improved, and the stability of the system is improved.

Inventors

  • KE JIN
  • YANG CHENG

Assignees

  • 上海思格数字技术有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (17)

  1. 1. The control method of the multiple devices is characterized in that the devices are respectively connected with a power grid through a first alternating current bus, and are respectively connected with the same second direct current bus, and the method comprises the following steps: acquiring the actual charge state of each device and the maximum power capacity corresponding to each device, wherein the maximum power capacity comprises maximum outputtable power and maximum inputtable power; And sequencing the multiple devices based on the actual charge states, and controlling the devices to run according to the maximum power capacity corresponding to the sequenced devices.
  2. 2. The method for controlling multiple devices according to claim 1, wherein the sorting the multiple devices based on the actual states of charge and controlling the operation of the devices according to the maximum power capacities corresponding to the sorted devices includes: controlling the equipment with high actual charge state and the maximum outputtable power greater than 0to output power to the second direct current bus; controlling the device with the low actual state of charge and the maximum inputtable power greater than 0to absorb power from the second direct current bus.
  3. 3. The method for controlling multiple devices according to claim 1, wherein the sorting the multiple devices based on the actual states of charge and controlling the operation of the devices according to the maximum power capacities corresponding to the sorted devices includes: acquiring a first accumulated value of the maximum outputtable power corresponding to a first number of devices with the maximum actual state of charge and a second accumulated value of the maximum inputtable power corresponding to the remaining second number of devices, wherein the sum of the first number and the second number is the total number of the multiple devices; And controlling the working state of the equipment relative to the second direct current bus based on the first accumulated value and the second accumulated value, wherein the working state comprises output power or absorption power.
  4. 4. The method of claim 3, wherein controlling the operating state of the device relative to the second dc bus based on the first accumulated value and the second accumulated value comprises: and controlling the input and the output of each device to the second direct current bus to be 0 under the condition that the first accumulated value and/or the second accumulated value is 0.
  5. 5. The method of claim 3, wherein controlling the operating state of the device relative to the second dc bus based on the first accumulated value and the second accumulated value comprises: And controlling the first number of devices to output power to the second direct current bus based on the maximum outputtable power corresponding to each device under the condition that the first accumulated value is equal to the second accumulated value and the first accumulated value and the second accumulated value are not 0, and controlling the second number of devices to absorb power from the second direct current bus based on the maximum inputtable power corresponding to each device.
  6. 6. The method of claim 3, wherein controlling the operating state of the device relative to the second dc bus based on the first accumulated value and the second accumulated value comprises: And controlling the first number of devices to output power to the second direct current bus based on the maximum output power corresponding to each device when the second accumulated value is greater than 0, the second number is 1, and the first accumulated value is less than or equal to the second accumulated value, and controlling the second number of devices to absorb power from the second direct current bus based on the first accumulated value.
  7. 7. The method of claim 3, wherein controlling the operating state of the device relative to the second dc bus based on the first accumulated value and the second accumulated value comprises: And controlling the first number of devices to output power to the second direct current bus based on the second accumulated value under the condition that the first accumulated value is larger than 0, the first number is 1 and the first accumulated value is larger than or equal to the second accumulated value, and controlling the second number of devices to absorb power from the second direct current bus based on the maximum inputtable power corresponding to each device.
  8. 8. The method of claim 3, wherein controlling the operating state of the device relative to the second dc bus based on the first accumulated value and the second accumulated value comprises: Acquiring a third accumulated value of the maximum outputtable power corresponding to a third number of devices with the maximum actual state of charge and a fourth accumulated value of the maximum inputtable power corresponding to the remaining fourth number of devices, wherein the first number is the sum of the third number and 1, and the sum of the fourth number and the third number is the total number of the multiple devices; controlling the third number of devices to output power to the second DC bus based on the maximum available output power corresponding to each device when the first accumulated value is greater than the second accumulated value and the third accumulated value is less than the fourth accumulated value, controlling devices of the second number of devices having the maximum available input power greater than 0to absorb power from the second DC bus based on the second accumulated value, controlling a target device to output power to the second DC bus based on a third power value, The third power is a difference between the second accumulated value and the third accumulated value, and the target device is a device subsequent to the third number of devices.
  9. 9. The method for controlling multiple devices according to any one of claims 1 to 8, wherein obtaining a maximum power capability corresponding to each of the devices includes: obtaining photovoltaic maximum power, battery maximum charge and discharge capacity and load power corresponding to each acquisition time of the equipment; Determining the maximum outputtable power based on the photovoltaic maximum power, a battery maximum discharge capability, and the load power; the maximum inputtable power is determined based on a battery maximum charge capacity, the load power, and the photovoltaic maximum power.
  10. 10. The method of claim 9, wherein the determining the maximum outputtable power based on the photovoltaic maximum power, a battery maximum discharge capability, and the load power comprises: Determining the difference between the sum of the photovoltaic maximum power and the battery maximum discharge capacity and the load power as the maximum outputtable power under the condition that the sum of the photovoltaic maximum power and the battery maximum discharge capacity is larger than the load power; and determining the maximum outputtable power as 0 when the sum of the photovoltaic maximum power and the battery maximum discharge capacity is smaller than or equal to the load power.
  11. 11. The method of claim 9, wherein the determining the maximum inputtable power based on the battery maximum charge capability, the load power, and the photovoltaic maximum power comprises: Determining the maximum inputtable power based on a difference between the sum of the battery maximum charging capability and the load power and the photovoltaic maximum power, in the case that the sum of the battery maximum charging capability and the load power is greater than the photovoltaic maximum power; and determining the maximum inputtable power to be 0 when the sum of the maximum battery charging capability and the load power is smaller than or equal to the photovoltaic maximum power.
  12. 12. The method for controlling multiple devices according to any one of claims 1 to 8, wherein the sorting the multiple devices based on the actual states of charge and controlling the operation of the devices according to the maximum power capacities corresponding to the sorted devices includes: Determining an output voltage reference value corresponding to the direct current converter based on the actual state of charge and a reference value of the output voltage reference value of the direct current converter correspondingly connected with the equipment; And controlling the operation of the equipment based on the output voltage reference value, the actual output voltage of the equipment and the maximum power capacity.
  13. 13. The control device of the multiple devices is characterized in that the devices are respectively connected with a power grid through a first alternating current bus, and are respectively connected with the same second direct current bus, and the device comprises: the first processing module is used for acquiring the actual charge state of each device and the maximum power capacity corresponding to each device, wherein the maximum power capacity comprises maximum outputtable power and maximum inputtable power; And the second processing module is used for sequencing the multiple devices based on the actual charge states and controlling the operation of the devices according to the maximum power capacity corresponding to the sequenced devices.
  14. 14. An optical storage and filling system, comprising: at least one device, each device is respectively used for being connected with a power grid through a first alternating current bus, and each device is respectively connected with the same second direct current bus; Each of the devices operates based on the control method of the multi-device as claimed in any one of claims 1 to 12.
  15. 15. The optical storage and retrieval system according to claim 14, further comprising: The at least one direct current converter is arranged in one-to-one correspondence with the at least one device, the direct current converters are connected with internal direct current buses of the corresponding devices, and the direct current converters are connected through the second direct current buses.
  16. 16. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements a method of controlling a multi-device according to any one of claims 1-12.
  17. 17. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements a method of controlling a multi-device according to any of claims 1-12.

Description

Multi-device control method and optical storage and charging system Technical Field The application belongs to the field of optical storage systems, and particularly relates to a multi-device control method and an optical storage and filling system. Background Optical storage devices typically include photovoltaic, energy storage cells, dc bus, current transformers, controllers, and the like. In the related art, in order to obtain an optical storage system with a larger capacity, a plurality of optical storage devices are often subjected to ac coupling at a grid-connected point, and power exchange can be performed between the optical storage devices of the ac parallel operation, so that cooperative control is realized. However, in the ac coupling scenario, some optical storage devices often use electricity from the power grid to support the load when the energy storage capacity is insufficient due to limited local energy storage capacity, which not only affects the equalization effect between the devices, but also increases the electricity cost on the network side. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a control method of multiple devices and an optical storage and charging system, which can ensure the power consumption requirement of the internal load of each device without taking power from a power grid, reduce the power consumption cost of the network side, improve the charge balance among the multiple devices, improve the utilization rate of surplus energy storage capacity and improve the stability of the system. In a first aspect, the present application provides a method for controlling multiple devices, where each device is respectively connected to a power grid through a first ac bus, and each device is respectively connected to a same second dc bus, and the method includes: acquiring the actual charge state of each device and the maximum power capacity corresponding to each device, wherein the maximum power capacity comprises maximum outputtable power and maximum inputtable power; And sequencing the multiple devices based on the actual charge states, and controlling the devices to run according to the maximum power capacity corresponding to the sequenced devices. According to the multi-device control method, each device is connected to the same second direct current bus, and according to the maximum outputtable power and the maximum inputtable power of each device relative to the second direct current bus, the device and the second direct current bus are controlled to perform energy interaction according to the actual charge state of the energy storage system in each device, the power consumption requirement of the internal load of each device can be guaranteed without taking power from a power grid, the power consumption cost of the network side is reduced, the charge balance among the multiple devices can be improved, the utilization rate of surplus energy storage capacity is improved, and the stability of the system is improved. According to an embodiment of the present application, the sorting the multiple devices based on the actual states of charge, and controlling the operation of the devices according to the maximum power capacities corresponding to the sorted devices, includes: controlling the equipment with high actual charge state and the maximum outputtable power greater than 0to output power to the second direct current bus; controlling the device with the low actual state of charge and the maximum inputtable power greater than 0to absorb power from the second direct current bus. According to an embodiment of the present application, the sorting the multiple devices based on the actual states of charge, and controlling the operation of the devices according to the maximum power capacities corresponding to the sorted devices, includes: acquiring a first accumulated value of the maximum outputtable power corresponding to a first number of devices with the maximum actual state of charge and a second accumulated value of the maximum inputtable power corresponding to the remaining second number of devices, wherein the sum of the first number and the second number is the total number of the multiple devices; And controlling the working state of the equipment relative to the second direct current bus based on the first accumulated value and the second accumulated value, wherein the working state comprises output power or absorption power. According to one embodiment of the present application, the controlling the operating state of the device with respect to the second dc bus based on the first accumulated value and the second accumulated value includes: and controlling the input and the output of each device to the second direct current bus to be 0 under the condition that the first accumulated value and/or the second accumulated value is 0. According to one embodimen