CN116359646A - Frequency converter detection method and device, electronic equipment and storage medium - Google Patents
Frequency converter detection method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a frequency converter detection method, a frequency converter detection device, electronic equipment and a storage medium, wherein the frequency converter detection method comprises the following steps: periodically acquiring three-phase current of a frequency converter; according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current; determining parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods; and if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter. Therefore, the frequency converter can rapidly and accurately detect the corresponding sudden faults in a long-time working state, and the detection accuracy is improved.
Description
Technical Field
The invention relates to the technical field of frequency converters, in particular to a frequency converter detection method, a frequency converter detection device, electronic equipment and a storage medium.
Background
The frequency conversion technology is a conversion technology for converting direct current into alternating current with different frequencies. The current industrial frequency converter converts a power frequency alternating current power supply into an alternating current power supply with adjustable frequency and voltage, realizes the speed regulation of an alternating current motor and is widely applied to various production and manufacturing fields; in the related art, the existing industrial frequency converter usually needs to work for a long time, sudden faults are easy to occur in the work, the corresponding sudden faults are difficult to detect rapidly and accurately, and the detection accuracy is insufficient.
Disclosure of Invention
In a first aspect, the present invention provides a method for detecting a frequency converter, including:
periodically acquiring three-phase current of a frequency converter;
according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current;
determining parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods;
and if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter.
Preferably, the periodically obtaining the three-phase current of the frequency converter includes:
performing period division according to a preset acquisition frequency, and determining a first time period and a second time period; the first time period is before the second time period;
and acquiring the frequency converter according to the first time period to obtain a first three-phase current corresponding to the frequency converter, and acquiring the frequency converter according to the second time period to obtain a second three-phase current corresponding to the frequency converter.
Preferably, the determining parameter information of the frequency converter in a plurality of periods according to the three-phase current of the frequency converter includes:
detecting two-phase current according to the three-phase current of the frequency converter in the first time period, and determining first parameter information corresponding to the frequency converter in the first time period;
and detecting the two-phase current according to the three-phase current of the frequency converter in the second time period, and determining second parameter information corresponding to the frequency converter in the second time period.
Preferably, the determining, based on the parameter information of the frequency converter in a plurality of periods, the parameter information of the frequency converter in a next period includes:
determining a first current direction and a first current magnitude for the first time period and a second current direction and a second current magnitude for the second time period based on the first parameter information and the second parameter information;
according to the corresponding relation between the first current direction and the second current direction, calculating a parameter difference value of the frequency converter between the first time period and the second time period by adopting the first current amplitude and the second current amplitude;
and determining parameter information of the frequency converter in the next period based on the parameter difference value.
Preferably, the calculating, according to the correspondence between the first current direction and the second current direction, the parameter difference between the first time period and the second time period of the frequency converter using the first current amplitude and the second current amplitude includes:
if the first current direction and the second current direction are the same, the parameter difference is calculated using the following formula:
wherein k represents the parameter difference; i t Representing a first reference current, which is calculated for the first current amplitude, I t ' represents a second reference current, the second reference current is calculated for the second current amplitude, and n represents the number of reference currents.
Preferably, the determining the parameter information of the frequency converter in the next period based on the parameter difference value includes:
and calculating the parameter difference value and the second reference current to obtain a reference current amplitude, and determining the reference current amplitude as parameter information of the frequency converter in the next period.
Preferably, if the frequency converter meets a preset condition between the parameter information of the next period and the preset parameter information, the obtaining the detection result that the frequency converter fails includes:
comparing the parameter information of the frequency converter in the next period with preset parameter information, and when the difference value between the parameter information of the frequency converter in the next period and the preset parameter information is not in a preset range, determining that the parameter information of the frequency converter in the next period is different from the preset parameter information, obtaining a fault detection result of the frequency converter.
In a second aspect, an embodiment of the present invention provides a frequency converter detection apparatus, including:
the acquisition module is used for periodically acquiring the three-phase current of the frequency converter;
the first determining module is used for determining parameter information of the frequency converter in a plurality of periods according to the three-phase current of the frequency converter; the parameter information comprises the current direction and the current amplitude of the three-phase current;
the second determining module is used for determining the parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods;
and the detection module is used for obtaining a detection result of the frequency converter failure if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the steps of the method for detecting a frequency converter as described above are implemented when the processor executes the computer program.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of a frequency converter detection method as described above.
The scheme of the invention at least comprises the following beneficial effects:
according to the frequency converter detection method provided by the invention, firstly, three-phase current of the frequency converter is periodically obtained; according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current; then, based on the parameter information of the frequency converter in a plurality of periods, determining the parameter information of the frequency converter in the next period; and finally, if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter. Therefore, the frequency converter can rapidly and accurately detect the corresponding sudden faults in a long-time working state, and the detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic overall flow chart of a frequency converter detection method according to an embodiment of the present invention;
fig. 2 is a block diagram of a frequency converter detection device according to an embodiment of the present invention;
fig. 3 is a block diagram of an electronic device according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second, third and the like in the description and in the claims of the invention and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The following embodiments of the present application will be described by way of example with reference to the accompanying drawings.
As shown in fig. 1, a specific embodiment of the present invention provides a method for detecting a frequency converter, including:
s10, periodically acquiring three-phase current of the frequency converter.
In this embodiment, three-phase currents of a plurality of different frequency converters may be obtained through the cloud control platform, and when the frequency converters work, the three-phase currents provided by the frequency converters may output corresponding waveforms and upload the waveforms to the cloud control platform, so as to perform detection processing through the cloud control platform, for example, collect waveforms of the frequency converters by using an oscilloscope and upload the waveforms to the cloud control platform; it can be understood that when the three-phase current of the frequency converter is obtained, the three-phase current corresponding to each time period can be obtained by collecting the three-phase current according to a preset time period.
Specifically, the periodically obtaining the three-phase current of the frequency converter includes: performing period division according to a preset acquisition frequency, and determining a first time period and a second time period; the first time period is before the second time period; and acquiring the frequency converter according to the first time period to obtain a first three-phase current corresponding to the frequency converter, and acquiring the frequency converter according to the second time period to obtain a second three-phase current corresponding to the frequency converter.
In this embodiment, a user may collect corresponding three-phase currents for each frequency converter by using different collection frequencies for different frequency converters, and after the user sets the collection frequency corresponding to each frequency converter, collect the corresponding three-phase currents in each time period by dividing the corresponding collection frequency into corresponding time periods; it can be understood that the first time period and the second time period may be two periods spaced from each other, for example, the second time period is the current period, and the first time period is 1 minute before the current period, that is, 1 minute between the first time period and the second time period, so that corresponding three-phase currents can be respectively collected for the first time period and the second time period; the first time period and the second time period may be short time periods, for example, 5 seconds, so that the first three-phase current corresponding to the frequency converter is obtained briefly in the first time period and the second three-phase current corresponding to the frequency converter is obtained briefly in the second time period.
S20, determining parameter information of the frequency converter in a plurality of periods according to three-phase current of the frequency converter; the parameter information includes the current direction and the current magnitude of the three-phase current.
In the present embodiment, the current direction indicates the flow direction of the current of each phase, the current amplitude indicates the current amplitude of each phase indicates the maximum absolute value of the instantaneous occurrence of the current; by detecting the three-phase current in each time period, the cloud control platform can determine the current direction and the current amplitude of the three-phase current in each time period, and therefore analysis is carried out according to the current direction and the current amplitude in each time period to determine whether the corresponding frequency converter fails or not.
Specifically, the determining the parameter information of the frequency converter in a plurality of periods according to the three-phase current of the frequency converter includes: detecting two-phase current according to three-phase current of the frequency converter in a first time period, and determining first parameter information corresponding to the frequency converter in the first time period; and detecting the two-phase current according to the three-phase current of the frequency converter in the second time period, and determining second parameter information corresponding to the frequency converter in the second time period.
When the two-phase current is detected, the corresponding parameter information can be determined by detecting the waveform of the current between the two phases and according to the waveform between the two phases; optionally, the current direction determined after the phase A, the phase B and the phase C of the frequency converter detect the waveform in the first time period is A, B and C, and the current amplitude corresponding to the three-phase current is I a 、I b 、I c The current direction determined after the waveform is detected in the second time period is A, C and B, and the current amplitude corresponding to the three-phase current is I' a 、I′ b 、I′ c Therefore, the frequency converter can be subjected to fault detection according to the current direction and the current amplitude corresponding to the first time period and the second time period.
S30, determining parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods.
In this embodiment, after the next period of the frequency converter indicates the second time period, the parameter information of the frequency converter in the next period can be calculated through the first parameter information corresponding to the first time period and the second parameter information corresponding to the second time period, so that whether the parameter information corresponding to the frequency converter in the next period is abnormal or not is detected, and whether the frequency converter fails or not is determined.
Specifically, the determining the parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in the plurality of periods includes: determining a first current direction and a first current magnitude for a first time period and a second current direction and a second current magnitude for a second time period based on the first parameter information and the second parameter information; according to the corresponding relation between the first current direction and the second current direction, calculating a parameter difference value of the frequency converter between the first time period and the second time period by adopting the first current amplitude and the second current amplitude; and determining the parameter information of the frequency converter in the next period based on the parameter difference value.
The first current direction and the second current direction may be the same direction or opposite directions, and when the first current direction and the second current direction are the same, the corresponding first current amplitude and second current amplitude may be determined, further, the first reference current corresponding to the first time period may be determined according to the first current amplitude, and the second reference current corresponding to the second time period may also be determined according to the second current amplitude; alternatively, the first reference current may be represented as I t The second reference current may be denoted as I' t The first reference current is expressed as a total current corresponding to the first current amplitude, and the second reference current is expressed as a total current of the second current amplitude, so that the first reference current can be calculated by the following formula:
and, the second reference current may be calculated by the following formula:
therefore, after the first reference current and the second reference current are determined, the parameter difference between the first time period and the second time period can be calculated according to the first reference current and the second reference current, and further, the parameter information of the frequency converter in the next period can be determined according to the parameter difference.
Further, according to the correspondence between the first current direction and the second current direction, calculating the parameter difference between the first time period and the second time period by using the first current amplitude and the second current amplitude includes: if the first current direction is the same as the second current direction, the parameter difference is calculated using the following formula:
wherein k represents a parameter difference; i t Representing a first reference current, which is calculated as a first current amplitude, I' t And the second reference current is calculated for the second current amplitude, and n represents the number of the reference currents.
In the present embodiment, the first reference current U is calculated by the first current amplitude t And calculating a second reference current I 'through a second current amplitude' t The parameter difference between the first time period and the second time period can be determined by calculating according to a plurality of first reference currents calculated by the frequency converter in the first time period and a plurality of second reference currents calculated by the frequency converter in the second time period.
Further, determining parameter information of the frequency converter in a next period based on the parameter difference value includes: and calculating the parameter difference value and the second reference current to obtain a reference current amplitude, and determining the reference current amplitude as parameter information of the frequency converter in the next period.
And the parameter difference value and the second reference current can be summed up and calculated to determine the total current of the next period, and then the reference current amplitude corresponding to the next period can be obtained by back-pushing calculation according to the total current of the next period, so that whether the frequency converter fails in the next period or not can be detected according to the reference current amplitude obtained by calculation of the next period, and the sudden failure of the frequency converter can be timely detected.
And S40, if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter.
In this embodiment, the preset parameter information may be a current amplitude value obtained by running the frequency converter in a history time, and the preset condition indicates that a difference value between the parameter information of the next period and the preset parameter information is not in a preset range, so that the difference value between the parameter information of the next period and the preset parameter information can be calculated, whether the difference value is in the preset range or not is judged according to the difference value, and if the difference value is in the preset range, it can be determined that a detection result of the frequency converter does not have sudden faults; if the detection result is not within the preset range, the detection result of the frequency converter can be determined to be that the sudden fault occurs.
Specifically, if the frequency converter satisfies a preset condition between the parameter information of the next period and the preset parameter information, the obtaining the detection result that the frequency converter fails includes: comparing the parameter information of the frequency converter in the next period with preset parameter information, and when the difference value between the parameter information of the frequency converter in the next period and the preset parameter information is not in a preset range, determining that the parameter information of the frequency converter in the next period is different from the preset parameter information, and obtaining a fault detection result of the frequency converter.
Comparing the parameter information of the frequency converter in the next period with preset parameter information, and calculating a corresponding difference value to determine whether the detection result of the frequency converter is a fault or not according to the difference value between the parameter information and the preset parameter information; optionally, if the detection result is that a fault occurs, the cloud control platform may output the detection result that the fault occurs to the visualization platform for viewing.
According to the frequency converter detection method provided by the invention, firstly, three-phase current of the frequency converter is periodically obtained; according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current; then, based on the parameter information of the frequency converter in a plurality of periods, determining the parameter information of the frequency converter in the next period; and finally, if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter. Therefore, the frequency converter can rapidly and accurately detect the corresponding sudden faults in a long-time working state, and the detection accuracy is improved.
As shown in fig. 2, an embodiment of the present invention provides a frequency converter detection apparatus 10, including:
an acquisition module 11, configured to periodically acquire three-phase currents of the frequency converter;
a first determining module 12, configured to determine parameter information of the frequency converter in a plurality of periods according to three-phase currents of the frequency converter; the parameter information comprises the current direction and the current amplitude of the three-phase current;
a second determining module 13, configured to determine parameter information of the frequency converter in a next period based on parameter information of the frequency converter in a plurality of periods;
the detection module 14 is configured to obtain a detection result of the frequency converter failure if the frequency converter satisfies a preset condition between the parameter information of the next period and the preset parameter information.
The frequency converter detection device 10 provided by the invention firstly periodically acquires three-phase current of a frequency converter; according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current; then, based on the parameter information of the frequency converter in a plurality of periods, determining the parameter information of the frequency converter in the next period; and finally, if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter. Therefore, the frequency converter can rapidly and accurately detect the corresponding sudden faults in a long-time working state, and the detection accuracy is improved.
It should be noted that, the frequency converter detection device 10 provided in the embodiment of the present invention is a device corresponding to the above-mentioned frequency converter detection method, all embodiments of the above-mentioned frequency converter detection method are applicable to the frequency converter detection device 10, and the above-mentioned frequency converter detection device 10 has corresponding modules corresponding to the steps in the above-mentioned frequency converter detection method, so that the same or similar beneficial effects can be achieved, and in order to avoid excessive repetition, excessive redundant description is not performed on each module in the frequency converter detection device 2.
As shown in fig. 3, the embodiment of the present invention further provides an electronic device 20, including a memory 202, a processor 201, and a computer program stored in the memory 202 and executable on the processor 201, where the processor 201 implements the steps of the above-mentioned frequency converter detection method when executing the computer program.
Specifically, the processor 201 is configured to call a computer program stored in the memory 202, and execute the following steps:
periodically acquiring three-phase current of a frequency converter;
according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current;
determining parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods;
and if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter.
Optionally, the periodically acquiring three-phase currents of the frequency converter performed by the processor 201 includes:
performing period division according to a preset acquisition frequency, and determining a first time period and a second time period; the first time period is before the second time period;
and acquiring the frequency converter according to the first time period to obtain a first three-phase current corresponding to the frequency converter, and acquiring the frequency converter according to the second time period to obtain a second three-phase current corresponding to the frequency converter.
Optionally, determining the parameter information of the frequency converter in a plurality of periods according to the three-phase current of the frequency converter performed by the processor 201 includes:
detecting two-phase current according to three-phase current of the frequency converter in a first time period, and determining first parameter information corresponding to the frequency converter in the first time period;
and detecting the two-phase current according to the three-phase current of the frequency converter in the second time period, and determining second parameter information corresponding to the frequency converter in the second time period.
Optionally, the determining, by the processor 201, the parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in the plurality of periods includes:
determining a first current direction and a first current magnitude for a first time period and a second current direction and a second current magnitude for a second time period based on the first parameter information and the second parameter information;
according to the corresponding relation between the first current direction and the second current direction, calculating a parameter difference value of the frequency converter between the first time period and the second time period by adopting the first current amplitude and the second current amplitude;
and determining the parameter information of the frequency converter in the next period based on the parameter difference value.
Optionally, the calculating, by the processor 201, the parameter difference between the first time period and the second time period of the frequency converter according to the correspondence between the first current direction and the second current direction by using the first current amplitude and the second current amplitude includes:
if the first current direction is the same as the second current direction, the parameter difference is calculated using the following formula:
wherein k represents a parameter difference; i t Representing a first reference current, which is calculated for a first current amplitude, I t ' represents a second reference current, calculated for a second current magnitude, n represents the number of reference currents.
Optionally, the determining, by the processor 201, parameter information of the frequency converter in a next period based on the parameter difference value includes:
and calculating the parameter difference value and the second reference current to obtain a reference current amplitude, and determining the reference current amplitude as parameter information of the frequency converter in the next period.
Optionally, if the frequency converter satisfies the preset condition between the parameter information of the next period and the preset parameter information, the obtaining, by the processor 201, the detection result that the frequency converter fails includes:
comparing the parameter information of the frequency converter in the next period with preset parameter information, and when the difference value between the parameter information of the frequency converter in the next period and the preset parameter information is not in a preset range, determining that the parameter information of the frequency converter in the next period is different from the preset parameter information, and obtaining a fault detection result of the frequency converter.
That is, in the embodiment of the present invention, the steps of the above-mentioned method for detecting a frequency converter are implemented when the processor 201 of the electronic device 20 executes the computer program, so that the frequency converter can quickly and accurately detect a corresponding sudden fault in a state of long-time working, and the accuracy of detection is improved.
It should be noted that, since the steps of the above-mentioned frequency converter detection method are implemented when the processor 201 of the electronic device 20 executes the computer program, all embodiments of the above-mentioned frequency converter detection method are applicable to the electronic device 20, and the same or similar advantages can be achieved.
The computer readable storage medium provided in the embodiments of the present invention stores a computer program, and when the computer program is executed by a processor, the process of the frequency converter detection method or the application-side frequency converter detection method provided in the embodiments of the present invention is implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is provided herein.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM) or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. A method for detecting a frequency converter, comprising:
periodically acquiring three-phase current of a frequency converter;
according to the three-phase current of the frequency converter, determining parameter information of the frequency converter in a plurality of periods; the parameter information comprises the current direction and the current amplitude of the three-phase current;
determining parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods;
and if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information, obtaining a fault detection result of the frequency converter.
2. The method of claim 1, wherein periodically obtaining three-phase currents of the frequency converter comprises:
performing period division according to a preset acquisition frequency, and determining a first time period and a second time period; the first time period is before the second time period;
and acquiring the frequency converter according to the first time period to obtain a first three-phase current corresponding to the frequency converter, and acquiring the frequency converter according to the second time period to obtain a second three-phase current corresponding to the frequency converter.
3. The method for detecting a frequency converter according to claim 2, wherein determining parameter information of the frequency converter in a plurality of periods according to three-phase currents of the frequency converter comprises:
detecting two-phase current according to the three-phase current of the frequency converter in the first time period, and determining first parameter information corresponding to the frequency converter in the first time period;
and detecting the two-phase current according to the three-phase current of the frequency converter in the second time period, and determining second parameter information corresponding to the frequency converter in the second time period.
4. A method of detecting a frequency converter according to claim 3, wherein the determining parameter information of the frequency converter in a next period based on parameter information of the frequency converter in a plurality of periods includes:
determining a first current direction and a first current magnitude for the first time period and a second current direction and a second current magnitude for the second time period based on the first parameter information and the second parameter information;
according to the corresponding relation between the first current direction and the second current direction, calculating a parameter difference value of the frequency converter between the first time period and the second time period by adopting the first current amplitude and the second current amplitude;
and determining parameter information of the frequency converter in the next period based on the parameter difference value.
5. The method according to claim 4, wherein calculating the parameter difference between the first time period and the second time period of the frequency converter using the first current amplitude and the second current amplitude according to the correspondence between the first current direction and the second current direction comprises:
if the first current direction and the second current direction are the same, the parameter difference is calculated using the following formula:
wherein k represents the parameter difference; u (U) t Representing a first reference current, which is calculated for the first current amplitude, I t ' represents a second reference current, the second reference current is calculated for the second current amplitude, and n represents the number of reference currents.
6. The method according to claim 5, wherein determining parameter information of the frequency converter in a next period based on the parameter difference value comprises:
and calculating the parameter difference value and the second reference current to obtain a reference current amplitude, and determining the reference current amplitude as parameter information of the frequency converter in the next period.
7. The method for detecting a frequency converter according to claim 1, wherein if the frequency converter satisfies a preset condition between the parameter information of the next period and the preset parameter information, obtaining a detection result that the frequency converter fails includes:
comparing the parameter information of the frequency converter in the next period with preset parameter information, and when the difference value between the parameter information of the frequency converter in the next period and the preset parameter information is not in a preset range, determining that the parameter information of the frequency converter in the next period is different from the preset parameter information, obtaining a fault detection result of the frequency converter.
8. A frequency converter detection device, comprising:
the acquisition module is used for periodically acquiring the three-phase current of the frequency converter;
the first determining module is used for determining parameter information of the frequency converter in a plurality of periods according to the three-phase current of the frequency converter; the parameter information comprises the current direction and the current amplitude of the three-phase current;
the second determining module is used for determining the parameter information of the frequency converter in the next period based on the parameter information of the frequency converter in a plurality of periods;
and the detection module is used for obtaining a detection result of the frequency converter failure if the frequency converter meets the preset condition between the parameter information of the next period and the preset parameter information.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the frequency converter detection method according to any one of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the frequency converter detection method according to any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116593811A (en) * | 2023-07-17 | 2023-08-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116593811A (en) * | 2023-07-17 | 2023-08-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
| CN116593811B (en) * | 2023-07-17 | 2023-09-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
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