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CN-121984334-A - Power apparatus and control method thereof

CN121984334ACN 121984334 ACN121984334 ACN 121984334ACN-121984334-A

Abstract

The application provides power equipment and a control method thereof, and relates to the technical field of power electronics, wherein the power equipment comprises a shell and at least one power module arranged in the shell; and in response to the existence of a power module in the power equipment, wherein the difference value between the running temperature and the environment temperature is larger than a preset threshold value, increasing the bus voltage of the power equipment. The application can solve the problem of condensation of the existing power module.

Inventors

  • LI JIAWANG
  • DAI SHANGFANG

Assignees

  • 阳光电源股份有限公司

Dates

Publication Date
20260505
Application Date
20251229

Claims (11)

  1. 1. A method of controlling a power device, the power device comprising a housing and at least one power module disposed within the housing, the method comprising: Acquiring the operation temperature of each power module and the environment temperature in the shell; and in response to the existence of a power module in the power equipment, wherein the difference value between the running temperature and the environment temperature is larger than a preset threshold value, increasing the bus voltage of the power equipment.
  2. 2. The method of claim 1, wherein increasing the bus voltage of the power device in response to the presence of a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold comprises: And increasing the bus voltage to a target voltage, wherein the target voltage is obtained according to the bus voltage lower limit value and preset parameters.
  3. 3. The method of claim 2, wherein the predetermined parameter has a mapping relationship with the difference value, and increasing the bus voltage to a target voltage comprises: Determining a target parameter corresponding to the difference value according to the difference value and a preset temperature difference-parameter matching relation; determining the target voltage according to the target parameter and the bus voltage lower limit value; the bus voltage is increased to the target voltage.
  4. 4. The method of claim 2, wherein increasing the bus voltage of the power device in response to the presence of a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold comprises: and regulating the bus voltage of the power equipment according to the difference value between the operating temperature of each power module and the ambient temperature until the difference value between the operating temperature of all the power modules in the power equipment and the ambient temperature is smaller than or equal to a preset threshold value, wherein the regulating variable of the target voltage is positively correlated with the difference value.
  5. 5. The method of claim 4, wherein increasing the bus voltage of the power device based on the difference between the operating temperature of each power module and the ambient temperature comprises: And in each temperature sampling period, gradually increasing the bus voltage of the power equipment according to a preset increment until the difference value between the running temperature of all power modules in the power equipment and the environment temperature is smaller than or equal to a preset threshold value.
  6. 6. The method of any of claims 1-5, wherein the power device further comprises a cooling fan for cooling the power module, the method further comprising: And in response to the power module with the difference value between the running temperature and the environment temperature being larger than a preset threshold value in the power equipment, reducing the rotating speed of the cooling fan.
  7. 7. The method of claim 6, wherein reducing the rotational speed of the cooling fan in response to the presence of a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold comprises: Determining a target rotating speed of the cooling fan based on the operating temperature of the power module and a temperature-rotating speed mapping relation; and reducing the rotating speed of the cooling fan according to the target rotating speed.
  8. 8. The method according to claim 6, characterized in that the method comprises: In response to the existence of a power module in the power equipment, wherein the difference value between the running temperature and the environment temperature is larger than a preset threshold value, and the difference value is larger than a first temperature difference, increasing the bus voltage of the power equipment; and reducing the rotation speed of the cooling fan under the condition that the difference value is larger than a second temperature difference, wherein the second temperature difference is larger than the first temperature difference.
  9. 9. A power device comprising a controller, a housing, and at least one power module disposed within the housing, the controller coupled to the at least one power module; The controller is used for acquiring the operation temperature of each power module and the environment temperature in the shell, and increasing the bus voltage of the power equipment in response to the power modules in the power equipment, wherein the difference between the operation temperature and the environment temperature is larger than a preset threshold value.
  10. 10. The power device of claim 9, further comprising a cooling fan, the controller coupled with the cooling fan; the controller is further configured to reduce a rotational speed of the cooling fan in response to a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold.
  11. 11. The power device according to claim 9 or 10, further comprising a first temperature acquisition device and a second temperature acquisition device respectively connected to the controller; the first temperature acquisition device is arranged in each power module and used for acquiring the operation temperature of each power module; The second temperature acquisition device is arranged in the shell of the power equipment and is used for acquiring the ambient temperature in the shell.

Description

Power apparatus and control method thereof Technical Field The application relates to the technical field of power electronics, in particular to power equipment and a control method thereof. Background When power equipment such as an inverter runs in areas such as high temperature, high humidity and the like, the temperature of a bin in the power equipment is higher, and certain power modules in the power equipment possibly have the condition of small heating value, so that the temperature of certain power modules is lower than the ambient temperature to generate condensation, the condensation can lead to electric insulation reduction, short circuit can be caused, and finally, devices such as a switching tube in the power equipment are invalid. Disclosure of Invention In view of the above, the present application aims to provide a power device and a control method thereof, which can solve the problem of condensation of the existing power module. Based on the above object, in a first aspect, the present application provides a control method of a power device, where the power device includes a housing and at least one power module disposed in the housing, the method includes obtaining an operation temperature of each power module and an ambient temperature in the housing, and increasing a bus voltage of the power device in response to a power module in the power device having a difference between the operation temperature and the ambient temperature greater than a preset threshold. In some embodiments, the increasing the bus voltage of the power device in response to the presence of a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold includes increasing the bus voltage to a target voltage, the target voltage being derived from the bus voltage lower limit and a preset parameter. In some embodiments, the preset parameter and the difference value have a mapping relation, and the bus voltage is increased to a target voltage, and the method comprises the steps of determining a target parameter corresponding to the difference value according to the difference value and a preset temperature difference-parameter matching relation, determining the target voltage according to the target parameter and the bus voltage lower limit value, and increasing the bus voltage to the target voltage. In some embodiments, the step of increasing the bus voltage of the power device in response to the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold includes adjusting the bus voltage of the power device according to the difference between the operating temperature of each power module and the ambient temperature until the differences between the operating temperatures of all the power modules in the power device and the ambient temperature are less than or equal to the preset threshold, and the adjustment amount of the target voltage is positively correlated with the difference. In some embodiments, the step of increasing the bus voltage of the power device according to the difference between the operating temperature of each power module and the ambient temperature includes step-by-step increasing the bus voltage of the power device according to a preset increment in each temperature sampling period until the difference between the operating temperatures of all the power modules in the power device and the ambient temperature is less than or equal to a preset threshold value, so as to obtain the target voltage. In some embodiments, the power device further comprises a cooling fan for cooling the power module, and the method further comprises reducing the rotation speed of the cooling fan corresponding to the power module in response to the power module having a difference between the operating temperature and the ambient temperature in the power device greater than a preset threshold. In some embodiments, the step of reducing the rotation speed of the cooling fan corresponding to the power module in response to the power module having the difference between the operating temperature and the ambient temperature greater than a preset threshold in the power device includes determining a target rotation speed of the cooling fan based on the operating temperature and a temperature-rotation speed mapping relationship of the power module, and reducing the rotation speed of the cooling fan according to the target rotation speed. In some embodiments, in response to a power module in the power device having a difference between the operating temperature and the ambient temperature greater than a preset threshold, the difference being greater than a first temperature difference and less than or equal to a second temperature difference, increasing a bus voltage of the power device, and decreasing a rotational speed of the cooling fan if the difference is greater than the sec