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CN-115211011-B - Power supply method, device, electronic equipment and readable storage medium

CN115211011BCN 115211011 BCN115211011 BCN 115211011BCN-115211011-B

Abstract

A power supply method, apparatus, electronic device, and readable storage medium, the method includes determining whether a current power grid is a weak power grid (S301), determining a target limit current value according to an actual input voltage of a power supply system if the current power grid is the weak power grid (S302), and supplying power to a load based on the target limit current value (S303). The power supply system can adaptively adjust the limiting current value of the power supply system according to the input voltage, so that the power supply system can be prevented from being under-voltage while supplying electric energy to a load. When the input voltage is larger, the limiting current value of the power supply system is adjusted to be a higher value, so that the power supply system can output larger output current, and the load is charged with high efficiency. When the input voltage is smaller, the limiting current value of the power supply system is adjusted to be a lower value, so that the power supply system can output smaller output current, and the power supply system can be prevented from being under-voltage while supplying electric energy to a load.

Inventors

  • CHEN BAOGUO
  • CHEN PAN
  • YU HUA
  • Yi Liqiong

Assignees

  • 华为数字能源技术有限公司
  • 华为数字能源技术有限公司

Dates

Publication Date
20260421
Application Date
20200910
Priority Date
20200910

Claims (20)

  1. 1. The power supply method is used for a power supply system, and the power supply system supplies power to a load through an external power grid, and is characterized by comprising the following steps: if the frequency of the power supply system in the under-voltage state in the preset period is greater than or equal to the preset frequency, determining that the current power grid is a weak power grid; if the current power grid is a weak power grid, regulating the limiting current value of the power supply system to a first limiting current value; obtaining the sum of the first limiting current value and a preset adjusting limiting current value, and taking the sum of the first limiting current value and the preset adjusting limiting current value as a second limiting current value; Determining whether to readjust the second limiting current value of the power supply system according to the first actual input voltage when the power supply system works at the second limiting current value, and taking the second limiting current value as a target limiting current value if the actual input voltage when the power supply system works at the second limiting current value is larger than or equal to a second voltage threshold value and smaller than or equal to a first voltage threshold value; and supplying power to the load based on the target limiting current value.
  2. 2. The method as recited in claim 1, further comprising: And determining whether the power supply system is in an under-voltage state according to at least one of the bus voltage of the power supply system and the actual input voltage.
  3. 3. The method of claim 2, wherein said determining whether the power supply system is in an under-voltage condition based on at least one of a bus voltage of the power supply system and the actual input voltage comprises: and if the bus voltage is smaller than or equal to a first undervoltage threshold value and/or the actual input voltage is smaller than or equal to a second undervoltage threshold value, determining that the power supply system is in an undervoltage state.
  4. 4. The method of claim 1, wherein determining whether to readjust the second limiting current value of the power supply system based on the first actual input voltage when the power supply system is operating at the second limiting current value, wherein if the actual input voltage when the power supply system is operating at the second limiting current value is greater than or equal to a second voltage threshold and less than or equal to a first voltage threshold, then taking the second limiting current value as a target limiting current value comprises: A. If the actual input voltage of the power supply system in the iteration period t is greater than or equal to a second voltage threshold value and the actual input voltage of the iteration period t is less than or equal to a first voltage threshold value, taking a limiting current value of the iteration period t as the target limiting current value, otherwise, executing B or C, wherein the first voltage threshold value is greater than the second voltage threshold value, and when t=1, the actual input voltage of the iteration period t is the first actual input voltage, and t is an integer greater than or equal to 1; B. if the actual input voltage of the iteration period t is greater than the first voltage threshold, obtaining the sum of the limiting current value of the iteration period t and the preset adjustment limiting current value, and taking the sum of the limiting current value of the iteration period t and the preset adjustment limiting current value as the limiting current value of the next iteration period; C. if the actual input voltage of the iteration period t is smaller than a second voltage threshold, obtaining a difference value between the limiting current value of the iteration period t and the preset adjustment limiting current value, and taking the difference value between the limiting current value of the iteration period t and the preset adjustment limiting current value as a limiting current value of a next iteration period; D. And acquiring the actual input voltage of the power supply system when the power supply system works at the limiting current value of the next iteration period, entering the next iteration period, and returning to execute the A.
  5. 5. The method of any one of claims 1-4, further comprising: and if the actual output current of the power supply system is smaller than the target limiting current value, adjusting the limiting current value of the power supply system to an initial limiting current value.
  6. 6. The method of any one of claims 1-4, further comprising: And if the actual input voltage is greater than or equal to a second undervoltage threshold, regulating the limiting current value of the power supply system to an initial limiting current value.
  7. 7. The method of any of claims 1-4, wherein prior to determining a target limiting current from an actual input voltage of the power supply system, further comprising: judging whether the power supply system comprises an energy storage module or not and whether the actual input voltage of the power supply system is larger than or equal to a third voltage threshold value or not; the determining a target limiting current according to the actual input voltage of the power supply system comprises: And if the power supply system comprises the energy storage module and the actual input voltage of the power supply system is greater than or equal to the third voltage threshold, determining the target limiting current value according to the actual input voltage of the power supply system.
  8. 8. The method of any one of claims 1-4, further comprising: And if the current power grid is a weak power grid, outputting alarm information, wherein the alarm information is used for indicating that the current power grid is the weak power grid.
  9. 9. The utility model provides a power supply unit, sets up in electrical power generating system, electrical power generating system supplies power to the load through external electric wire netting, its characterized in that, power supply unit includes: The processing module is used for determining that the current power grid is a weak current grid if the frequency of the power supply system in the under-voltage state in the preset period is greater than or equal to the preset frequency, adjusting the limiting current value of the power supply system to a first limiting current value if the current power grid is a weak current grid, obtaining the sum of the first limiting current value and the preset adjusting limiting current value, taking the sum of the first limiting current value and the preset adjusting limiting current value as a second limiting current value, and determining whether to readjust the second limiting current value of the power supply system according to the first actual input voltage when the power supply system works at the second limiting current value, and taking the second limiting current value as a target limiting current value if the actual input voltage when the power supply system works at the second limiting current value is greater than or equal to a second voltage threshold and less than or equal to the first voltage threshold; And the power supply module is used for supplying power to the load based on the target limiting current value.
  10. 10. The apparatus as recited in claim 9, further comprising: The processing module is further configured to determine whether the power supply system is in an under-voltage state according to at least one of a bus voltage of the power supply system and the actual input voltage.
  11. 11. The apparatus according to claim 10, wherein the processing module is configured to determine that the power supply system is in an under-voltage state if the bus voltage is less than or equal to a first under-voltage threshold and/or the actual input voltage is less than or equal to a second under-voltage threshold.
  12. 12. The device according to claim 9, characterized in that the processing module is in particular adapted to A. If the actual input voltage of the power supply system in the iteration period t is greater than or equal to a second voltage threshold value and the actual input voltage of the iteration period t is less than or equal to a first voltage threshold value, taking a limiting current value of the iteration period t as the target limiting current value, otherwise, executing B or C, wherein the first voltage threshold value is greater than the second voltage threshold value, and when t=1, the actual input voltage of the iteration period t is the first actual input voltage, and t is an integer greater than or equal to 1; B. if the actual input voltage of the iteration period t is greater than the first voltage threshold, obtaining the sum of the limiting current value of the iteration period t and the preset adjustment limiting current value, and taking the sum of the limiting current value of the iteration period t and the preset adjustment limiting current value as the limiting current value of the next iteration period; C. if the actual input voltage of the iteration period t is smaller than a second voltage threshold, obtaining a difference value between the limiting current value of the iteration period t and the preset adjustment limiting current value, and taking the difference value between the limiting current value of the iteration period t and the preset adjustment limiting current value as a limiting current value of a next iteration period; D. And acquiring the actual input voltage of the power supply system when the power supply system works at the limiting current value of the next iteration period, entering the next iteration period, and returning to execute the A.
  13. 13. The apparatus of any of claims 9-12, wherein the processing module is further configured to adjust the limiting current value of the power supply system to an initial limiting current value if the actual output current of the power supply system is less than the target limiting current value.
  14. 14. The apparatus of any of claims 9-12, wherein the processing module is further configured to adjust the limiting current value of the power supply system to an initial limiting current value if the actual input voltage is greater than or equal to a second under-voltage threshold.
  15. 15. The apparatus of any of claims 9-12, wherein the processing module is further configured to determine whether the power system includes an energy storage module and whether an actual input voltage of the power system is greater than or equal to a third voltage threshold, and determine the target limiting current value based on the actual input voltage of the power system if the power system includes the energy storage module and the actual input voltage of the power system is greater than or equal to the third voltage threshold.
  16. 16. The apparatus according to any one of claims 9-12, wherein the processing module is further configured to output an alarm message if the current power grid is a weak power grid, the alarm message being configured to indicate that the current power grid is a weak power grid.
  17. 17. A power supply system comprising the power supply device and the monitoring device according to any one of claims 9 to 16; the monitoring device is used for monitoring the power supply device.
  18. 18. A power supply system comprising a power grid, a power transformer, and the power supply system of claim 17, wherein the power grid supplies power to the power supply system through the power transformer.
  19. 19. An electronic device is characterized by comprising a memory and a processor; The processor is configured to couple to the memory, read and execute instructions in the memory to implement the method of any one of claims 1-8.
  20. 20. A computer readable storage medium, characterized in that the computer storage medium stores computer instructions, which when executed by a computer, cause the computer to perform the method of any of claims 1-8.

Description

Power supply method, device, electronic equipment and readable storage medium Technical Field The present application relates to the field of communications technologies, and in particular, to a power supply method, a device, an electronic apparatus, and a readable storage medium. Background The power supply system is an important component in the communication system for supplying the electric energy in the electric network to the load. Some power systems may be deployed in mountainous areas, highways, etc. scenarios to power loads such as remote radio units (remote radio unit, RRU) disposed in these scenarios. In these scenarios, there may be situations where the power supply system is far from the power transformer. When the distance between the power supply system and the power transformer is far, abnormal large impedance of the power transmission cable between the power transformer and the power supply system can be caused, and correspondingly, the voltage drop of the power transmission cable is too large, so that the power supply system can be subjected to input undervoltage and restarted repeatedly, and further, the situation that loads such as RRU cannot work normally can be caused. In the prior art, after the power supply system is restarted repeatedly due to the undervoltage of the input, an engineer usually manually modifies the limiting current value of the power supply system on the site of the power supply system, so that the input voltage cannot drop below the undervoltage point of the power supply system, and the repeated restarting of the power supply system is avoided. However, the power supply capability of the power supply system is forcedly limited by the mode of the prior art, and under the condition of heavy load, the load may be powered down due to insufficient power supply. Disclosure of Invention The embodiment of the application provides a power supply method, a device, electronic equipment and a readable storage medium, wherein a power supply system can adaptively adjust a limiting current value of the power supply system according to input voltage, so that the power supply system can be prevented from being under-voltage while supplying electric energy to a load. In a first aspect, an embodiment of the present application provides a power supply method, where the method may be applied to a power supply system, or a chip in the power supply system, or a rectifier in the power supply system, or may also be applied to a chip in the rectifier. The method will be described below by taking an example of application to a rectifier, in which the power supply system supplies power to the load through an external power grid. The rectifier can judge whether the current power grid is a weak power grid or not, and if the current power grid is the weak power grid, a target limiting current value can be determined according to the actual input voltage of the power supply system, and then the load is powered on based on the target limiting current value. If the current power grid is a weak power grid, the input undervoltage of the power supply system can be caused. When the power supply system has input undervoltage, the power supply system can be self-protected, and then components (rectifier, monitoring device and the like) in the power supply system are repeatedly restarted. In the embodiment of the application, when the current power grid is a weak power grid, the rectifier can adaptively adjust the limiting current value of the power supply system according to the input voltage, so that the power supply system can be prevented from being under-voltage while supplying electric energy to the load. When the power grid is normal, for example, a larger input voltage can be provided for the power supply system, the limiting current value of the power supply system can be adjusted to be a value commonly used for the power supply system, so that the power supply system can charge a load and charge a battery in the power supply system. In one possible implementation manner, the method for determining whether the current power grid is a weak power grid by the rectifier may be that if the number of times that the power supply system is in an under-voltage state in a preset period is greater than or equal to a preset number of times, the current power grid is determined to be the weak power grid. Because the voltage output by the power grid is variable, the bus voltage of the power supply system and the actual input voltage of the power supply system can be changed, so in the embodiment of the application, if the power supply system is in an under-voltage state at one time, the current power grid is determined to be a weak power grid possibly inaccurate. Therefore, in the embodiment of the application, in order to improve the accuracy of judging whether the current power grid is a weak power grid by the rectifier, the frequency of the power supply system in the under-voltage state in the preset period