CN-121984304-A - Harmonic regulation method and device of frequency converter, electronic equipment and storage medium

CN121984304ACN 121984304 ACN121984304 ACN 121984304ACN-121984304-A

Abstract

The application relates to a harmonic regulation method and device of a frequency converter, electronic equipment and a storage medium, wherein the method comprises the steps of obtaining a first parameter value related to the frequency converter, wherein the first parameter value related to the frequency converter comprises a first parameter value input into the frequency converter and a first parameter value output from the frequency converter, the first parameter value comprises voltage and current, adjusting a second parameter value related to the frequency converter, and comparing harmonic contents determined by the first parameter value before and after adjusting the second parameter value to determine final harmonic content and a corresponding second parameter value. The application solves the problem that the prior art does not detect the harmonic wave of the frequency converter and realize the self-adjustment scheme.

Inventors

TANG HAIYANG
ZHOU JIABAO
LUO DEHUI

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251218

Claims (10)

1. A method for harmonic regulation of a frequency converter, comprising: Obtaining a first parameter value associated with the frequency converter, wherein the first parameter value associated with the frequency converter comprises a first parameter value input to the frequency converter and a first parameter value output from the frequency converter; and adjusting a second parameter value associated with the frequency converter, and comparing the harmonic content determined by the first parameter value before and after adjusting the second parameter value to determine a final harmonic content and a corresponding second parameter value.
2. The method of claim 1, wherein adjusting a second parameter value associated with the frequency converter and comparing harmonic content determined by the first parameter value before and after adjusting the second parameter value to determine a final harmonic content and a corresponding second parameter value comprises: After determining the corresponding harmonic content based on the first parameter value, adjusting a second parameter value associated with the frequency converter and determining the corresponding harmonic content again based on the first parameter; And comparing the two times of harmonic contents obtained before and after the second parameter value is adjusted, and determining whether the process of determining the harmonic content is repeatedly executed or not according to the comparison result until the determined current harmonic content is lower than the harmonic content determined last time, so as to determine the current harmonic content and the corresponding second parameter value as a final harmonic regulation result.
3. The method of claim 2, wherein, in the case where the second parameter value is a reactance inductance, adjusting the second parameter value associated with the frequency converter after determining the corresponding harmonic content based on the first parameter value, and determining the corresponding harmonic content again based on the first parameter comprises: S11, determining corresponding first harmonic content based on the first parameter value under the condition that the first parameter value is in a first preset range; And S12, after the reactance induction quantity of the adjustable inductor in the frequency converter is increased by a first target value, if the first parameter after the first target value is increased is within the first preset range, determining the corresponding second harmonic content based on the first parameter after the first target value is increased.
4. A method according to claim 3, wherein comparing the two harmonic contents obtained before and after adjusting the second parameter value, and determining whether to repeatedly perform the above-mentioned process of determining the harmonic content according to the comparison result until the determined current harmonic content is lower than the last determined harmonic content, so as to determine the current harmonic content and the corresponding second parameter value as a final harmonic adjustment result, comprises: In the case where the second harmonic content is greater than or equal to the first harmonic content, the above S12 is performed again; And determining the second harmonic content and the corresponding reactance induction amount as a final harmonic regulation result when the second harmonic content is smaller than the first harmonic content.
5. The method of claim 2, wherein, in the case where the second parameter value is a switching frequency, adjusting the second parameter value associated with the frequency converter after determining the corresponding harmonic content based on the first parameter value, and determining the corresponding harmonic content again based on the first parameter comprises: S21, detecting the temperature of a power module of the frequency converter under the condition that the first parameter value is in a second preset range; s22, determining the corresponding third harmonic content based on the first parameter value under the condition that the temperature of the power module is in a third preset range; s23, after the switching frequency in the frequency converter is increased by a second target value, if the first parameter is in the second preset range after the second target value is increased, detecting the temperature of the power module of the frequency converter again; And S24, determining the corresponding fourth harmonic content based on the first parameter after the second target value is increased under the condition that the temperature of the frequency converter is in a fourth preset range.
6. The method of claim 5, wherein comparing the two harmonic contents obtained before and after adjusting the second parameter value, and determining whether to repeatedly perform the above-mentioned process of determining the harmonic content according to the comparison result until the determined current harmonic content is lower than the last determined harmonic content, so as to determine the current harmonic content and the corresponding second parameter value as a final harmonic adjustment result, comprises: In the case where the fourth harmonic content is greater than or equal to the third harmonic content, S23 described above is performed again; And determining the fourth harmonic content and the corresponding reactance induction amount as a final harmonic regulation result when the fourth harmonic content is smaller than the third harmonic content.
7. The method of claim 1, wherein the step of determining the position of the substrate comprises, Under the condition that the first parameter value is the first parameter value input to the frequency converter, the determined final harmonic content and the corresponding second parameter value are target values in an input harmonic scheme of the frequency converter; and in the case that the first parameter value is the first parameter value output from the frequency converter, the determined final harmonic content and the corresponding second parameter value are target values in an output harmonic scheme of the frequency converter.
8. A harmonic regulation device of a frequency converter, comprising: an acquisition module for acquiring a first parameter value associated with the frequency converter, wherein the first parameter value associated with the frequency converter comprises a first parameter value input to the frequency converter and a first parameter value output from the frequency converter; And the processing module is used for adjusting a second parameter value associated with the frequency converter and comparing the harmonic content determined by the first parameter value before and after adjusting the second parameter value so as to determine the final harmonic content and the corresponding second parameter value.
9. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are in communication with each other through the communication bus, the memory is used for storing a computer program, and the processor is used for realizing the harmonic regulation method of the frequency converter according to any one of claims 1-7 when the computer program is executed.
10. A storage medium having stored thereon a computer program, which when executed by a processor implements a method of harmonic tuning of a frequency converter according to any one of claims 1-7.

Description

Harmonic regulation method and device of frequency converter, electronic equipment and storage medium Technical Field The present application relates to the field of harmonic adjustment of frequency converters, and in particular, to a method and apparatus for harmonic adjustment of a frequency converter, an electronic device, and a storage medium. Background At present, the influence on the harmonic wave of the high-power frequency converter is huge, for example, in the aspect of a power grid, the harmonic wave can lead to voltage waveform distortion, and the voltage instability can be caused, and even the normal operation of other equipment is influenced. In terms of equipment, such as the frequency converter itself, heat may be generated due to harmonics, shortening the life. In the motor sector, harmonics can cause additional losses, generate heat, and even cause vibrations and noise. In addition, harmonics may also interfere with other electronic devices. At present, no scheme for detecting the harmonic waves of the frequency converter and realizing self-adjustment exists. Disclosure of Invention The application provides a harmonic wave adjusting method and device of a frequency converter, electronic equipment and a storage medium, and aims to solve the problem that in the prior art, the harmonic wave of the frequency converter is not detected and a self-adjusting scheme is realized. In a first aspect, the application provides a harmonic regulation method of a frequency converter, which comprises the steps of obtaining a first parameter value associated with the frequency converter, wherein the first parameter value associated with the frequency converter comprises a first parameter value input into the frequency converter and a first parameter value output from the frequency converter, the first parameter value comprises voltage and current, adjusting a second parameter value associated with the frequency converter, and comparing harmonic contents determined by the first parameter value before and after adjusting the second parameter value to determine final harmonic contents and corresponding second parameter values. Optionally, adjusting a second parameter value associated with the frequency converter and comparing the harmonic content determined by the first parameter value before and after adjusting the second parameter value to determine a final harmonic content and a corresponding second parameter value includes adjusting the second parameter value associated with the frequency converter after determining the corresponding harmonic content based on the first parameter value and determining the corresponding harmonic content again based on the first parameter, comparing two harmonic contents obtained before and after adjusting the second parameter value and determining whether to repeatedly perform the above-mentioned process of determining the harmonic content according to the comparison result until the determined current harmonic content is lower than the last determined harmonic content, so as to determine the current harmonic content and the corresponding second parameter value as a final harmonic adjustment result. Optionally, when the second parameter value is the reactance sensing amount, adjusting the second parameter value associated with the frequency converter after determining the corresponding harmonic content based on the first parameter value, and determining the corresponding harmonic content based on the first parameter again includes S11 determining the corresponding first harmonic content based on the first parameter value when the first parameter value is within a first preset range, S12 determining the corresponding second harmonic content based on the first parameter after increasing the reactance sensing amount of the adjustable inductor in the frequency converter by a first target value, if the first parameter after increasing the first target value is within the first preset range, and if the first parameter after increasing the first target value is within the first preset range. Optionally, comparing the two harmonic contents obtained before and after the second parameter value is adjusted, and determining whether to repeatedly execute the process of determining the harmonic content according to the comparison result until the determined current harmonic content is lower than the previously determined harmonic content, so as to determine the current harmonic content and the corresponding second parameter value as a final harmonic adjustment result, wherein the process of executing the step S12 again when the second harmonic content is greater than or equal to the first harmonic content, and determining the second harmonic content and the corresponding reactance induction quantity as a final harmonic adjustment result when the second harmonic content is less than the first harmonic content. Optionally, when the second parameter value is the switching frequency, after det