CN113064008B - Medium voltage fuse quality detection method, medium voltage fuse quality detection device, medium voltage fuse quality detection equipment and medium - Google Patents
Medium voltage fuse quality detection method, medium voltage fuse quality detection device, medium voltage fuse quality detection equipment and medium Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Abstract
The application discloses a medium voltage fuse quality detection method, device, equipment and medium, scan the medium voltage fuse that waits to detect through impedance analyzer, obtain the impedance-frequency curve and the impedance angle-frequency curve of waiting to detect the medium voltage fuse, calculate impedance similarity coefficient and impedance angle similarity coefficient according to the impedance-frequency curve, the impedance angle-frequency curve of waiting to detect medium voltage fuse and standard medium voltage fuse, finally judge whether waiting to detect the medium voltage fuse according to the size of impedance similarity coefficient and impedance angle similarity coefficient. The method has the advantages that the technical problems that in the prior art, a rated current temperature rise experiment method is adopted to detect the quality of the fuse, a plurality of professional devices are needed, the test process is complex, the time consumption is long, the influence of experimental conditions is easy to occur, the test results of different testers are large in dispersibility, and the test result errors are large are solved.
Description
Technical Field
The application relates to the technical field of quality detection, in particular to a medium voltage fuse quality detection method, a medium voltage fuse quality detection device, medium voltage fuse quality detection equipment and medium.
Background
The medium voltage fuse serves as a protection device in a medium voltage power distribution system and plays an important role in the medium voltage power distribution system. Therefore, quality inspection of the inspected medium voltage fuses is required. The prior art adopts a rated current temperature rise experiment method, the method needs a plurality of professional equipment, the test process is complex, the time consumption is long, and the method is easily influenced by experimental conditions (such as laboratory temperature, humidity, through-flow stability, contact areas of bases at two ends of a fuse, contact pressure and the like), so that the test results of different testers are large in dispersity, and the test result errors are large.
Disclosure of Invention
The application provides a medium voltage fuse quality detection method, device, equipment and medium, which are used for solving the technical problems that in the prior art, a rated current temperature rise experiment method is adopted for fuse quality detection, the method needs a plurality of professional equipment, the test process is complex, the time consumption is long, the influence of experimental conditions is easy to occur, the test result dispersibility of different testers is large, and the test result error is large.
In view of this, a first aspect of the present application provides a medium voltage fuse quality detection method, including:
scanning a medium voltage fuse to be detected through an impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected;
calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected, and an impedance-frequency curve and an impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected;
and judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
Optionally, the method further comprises:
acquiring a first maximum impedance value, a first frequency corresponding to the first maximum impedance value, a turning frequency of capacitive inductance of impedance and an impedance minimum value corresponding to the turning frequency according to the impedance-frequency curve of the medium voltage fuse to be detected;
and determining the internal condition of the medium voltage fuse to be detected according to the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected.
Optionally, the determining whether the medium voltage fuse to be detected is qualified according to the impedance similarity coefficient and the impedance angle similarity coefficient includes:
if the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified;
and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to the preset threshold value, judging that the medium voltage fuse to be detected is unqualified.
Optionally, the scanning frequency range of the impedance analyzer for scanning the medium voltage fuse to be detected is 50Hz-120MHz.
A second aspect of the present application provides a medium voltage fuse quality detection device, comprising:
the scanning unit is used for scanning the medium-voltage fuse to be detected through the impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium-voltage fuse to be detected;
the calculating unit is used for calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the impedance-frequency curve and the impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected;
and the judging unit is used for judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
Optionally, the method further comprises: an acquisition unit for
Acquiring a first maximum impedance value, a first frequency corresponding to the first maximum impedance value, a turning frequency of capacitive inductance of impedance and an impedance minimum value corresponding to the turning frequency according to the impedance-frequency curve of the medium voltage fuse to be detected;
and determining the internal condition of the medium voltage fuse to be detected according to the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected.
Optionally, the judging unit is specifically configured to:
if the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified;
and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to the preset threshold value, judging that the medium voltage fuse to be detected is unqualified.
Optionally, the scanning frequency range of the impedance analyzer for scanning the medium voltage fuse to be detected is 50Hz-120MHz.
A third aspect of the present application provides a medium voltage fuse quality detection device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the medium voltage fuse quality detection method according to any one of the first aspects according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium storing program code for executing the medium voltage fuse quality detection method of any one of the first aspects.
From the above technical scheme, the application has the following advantages:
the application provides a medium voltage fuse quality detection method, which comprises the following steps: scanning the medium voltage fuse to be detected through an impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected; calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected and an impedance-frequency curve and an impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected; and judging whether the medium-voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
According to the method, an impedance analyzer scans a medium voltage fuse to be detected to obtain an impedance-frequency curve and an impedance angle-frequency curve, then an impedance similarity coefficient and an impedance angle similarity coefficient are calculated according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and a standard medium voltage fuse, finally whether the medium voltage fuse to be detected is qualified or not is judged according to the impedance similarity coefficient and the impedance angle similarity coefficient, a quality detection result of the medium voltage fuse to be detected is obtained, equipment adopted in a detection process is simple, detection time is short, the detection result is not easily influenced by experimental conditions, accuracy is high, the technical problems that the quality detection of the fuse is carried out by adopting a rated current temperature rise experimental method in the prior art, the method is complex in testing process, time consumption is long, and easy to be influenced by experimental conditions, so that the test result dispersion of different testers is large, and the test result error is large are solved.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic flow chart of a medium voltage fuse quality detection method according to an embodiment of the present application;
fig. 2 is an equivalent circuit diagram of a medium voltage fuse provided in an embodiment of the present application at high frequency;
FIG. 3 is a wiring diagram of a medium voltage fuse and an impedance scanner according to an embodiment of the present application;
fig. 4 is a schematic diagram of an impedance-frequency curve and an impedance angle-frequency curve of a medium voltage fuse according to an embodiment of the present application;
fig. 5 is another flow chart of a medium voltage fuse quality detection method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a medium voltage fuse quality detection device according to an embodiment of the present application.
Detailed Description
The application provides a medium voltage fuse quality detection method, device, equipment and medium, which are used for solving the technical problems that in the prior art, a rated current temperature rise experiment method is adopted for fuse quality detection, the method needs a plurality of professional equipment, the test process is complex, the time consumption is long, the influence of experimental conditions is easy to occur, the test result dispersibility of different testers is large, and the test result error is large.
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
For ease of understanding, referring to fig. 1, an embodiment of a medium voltage fuse quality detection method provided in the present application includes:
and step 101, scanning the medium-voltage fuse to be detected through an impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium-voltage fuse to be detected.
An equivalent circuit of the medium voltage fuse under high frequency is shown in fig. 2, an impedance analyzer is adopted to scan the medium voltage fuse to be detected, the scanning frequency range is 50Hz-120MHz, an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected are obtained, as shown in fig. 4, the upper part of the diagram of fig. 4 is the impedance-frequency curve, and the lower part is the impedance angle-frequency curve. The impedance analyzer scans and connects the medium voltage fuse to be tested as shown in fig. 3. In order to ensure the accuracy of the detection result, when the quality of the medium voltage fuse with the same model is detected each time, the same special pure copper wires are adopted for the wiring at the two ends of the medium voltage fuse, and the shorter the wiring at the two ends is, the better the wiring at the two ends is.
And 102, calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the impedance-frequency curve and the impedance angle-frequency curve of the standard medium voltage fuse.
According to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected, calculating the impedance similarity coefficient and the impedance angle similarity coefficient according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected, obtaining the impedance similarity coefficient and the impedance angle similarity coefficient, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected, and the impedance-frequency curve and the impedance angle-frequency curve of the standard medium voltage fuse are obtained through scanning of an impedance analyzer when the standard medium voltage fuse is put in a warehouse, and the scanning frequency range is 50Hz-120MHz.
Impedance similarity coefficient S 1 The calculation process of (1) is as follows:
wherein Z is k Z is the discrete impedance value obtained by scanning the medium voltage fuse to be detected 0k The discrete impedance value obtained by scanning when the standard medium voltage fuse is put in storage is obtained, and N is the number of points of frequency scanning.
Impedance angle similarity coefficient S 2 The calculation process of (1) is as follows:
in θ k Discrete impedance angle theta obtained by scanning medium voltage fuse k to be detected 0k And the discrete impedance angle is obtained by scanning when the standard medium voltage fuse with the same model as the medium voltage fuse k to be detected is put in storage.
And step 103, judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
If the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified; and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to a preset threshold value, judging that the medium voltage fuse to be detected is unqualified. The preset threshold in the embodiments of the present application is preferably 0.95, i.e. when S 1 >0.95 and S 2 >And 0.95, judging that the state of the medium voltage fuse to be detected is normal, and the quality is qualified, and the medium voltage fuse to be detected can be used continuously, otherwise, judging that the quality of the medium voltage fuse to be detected is problematic and unqualified.
According to the method, an impedance analyzer scans the medium voltage fuse to be detected to obtain an impedance-frequency curve and an impedance angle-frequency curve, then an impedance similarity coefficient and an impedance angle similarity coefficient are calculated according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the standard medium voltage fuse, finally whether the medium voltage fuse to be detected is qualified or not is judged according to the impedance similarity coefficient and the impedance angle similarity coefficient, a quality detection result of the medium voltage fuse to be detected is obtained, equipment adopted in a detection process is simple, detection time is short, the detection result is not easily influenced by experimental conditions, accuracy is high, the technical problems that in the prior art, the quality detection of the fuse is carried out by adopting a rated current temperature rise experimental method, the method needs a plurality of professional equipment, the test process is complex, time consumption is long, and the influence of experimental conditions is easy, so that the test result dispersion of different testers is large, and the test result error is large are solved.
The foregoing is one embodiment of a method for detecting quality of a medium voltage fuse provided in the present application, and the following is another embodiment of a method for detecting quality of a medium voltage fuse provided in the present application.
Referring to fig. 5, a method for detecting quality of a medium voltage fuse according to an embodiment of the present application includes:
step 201, scanning the medium voltage fuse to be detected through an impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected.
Step 202, determining the internal condition of the medium voltage fuse to be detected according to the impedance-frequency curve of the medium voltage fuse to be detected.
In power distribution systems, many fuses have been in use for some time. During this time, although some process may occur, no fusing occurs. In addition, when the fuse is in overcurrent and blows, only one phase of the fuse is blown, the other phases are not blown, and the inside of the fuse is not necessarily subjected to a serious overcurrent process. When the fuse is in a fusing accident, power maintenance workers usually adopt a strategy of completely replacing the three-phase fuse, so that great waste is caused. However, whether these fuses, which do not exhibit the fuse phenomenon, can be used further, has been a concern of the power system. The prior method can not solve the problem. In the prior art, the LCR digital bridge is generally adopted to test the fuse resistor, so that the size of the fuse resistor can be obtained, but the useful information is less, and the change of the internal structure of the fuse cannot be judged; the medium voltage fuse is scanned by an X-ray scanning device, so that imaging can be performed to obtain the internal structural details of the fuse, but the device is expensive, radioactive and has a certain danger.
In order to solve the above problem, the embodiment of the present application may further determine the internal condition of the medium voltage fuse to be detected after acquiring the impedance-frequency curve thereof. Acquiring a first impedance maximum value Z according to an impedance-frequency curve of the medium voltage fuse to be detected 1 A first frequency f corresponding to the first impedance maximum 1 The impedance is changed from the turning frequency f of capacitive inductance 2 And the minimum value Z of impedance corresponding to the turning frequency 2 The method comprises the steps of carrying out a first treatment on the surface of the According to the first impedance maximum Z of the medium voltage fuse to be detected 1 First frequency f 1 Frequency f of turning 2 And an impedance minimum Z 2 The determination of the internal condition of the medium voltage fuse to be detected may be made with reference to fig. 4.
When the first impedance maximum Z of the medium voltage fuse to be detected 1 If the first maximum impedance Z of the medium voltage fuse to be detected is compared with the first maximum impedance Z of the standard medium voltage fuse in warehouse entry 1 When the number is obviously increased, then the judgment is to be madeDetecting that the fuse wires in a plurality of melts of the medium voltage fuse are broken or abnormal; first frequency f 1 The resonance frequency of the medium voltage fuse itself L, C reflects the subtle change of the medium voltage fuse itself L, C, and the change of C is not large, so that the change of the equivalent inductance L of the medium voltage fuse itself is mainly. Frequency f of turning 2 The resonance frequency of the equivalent capacitance of the medium voltage fuse and the inductance of the external lead is mainly reflected by the change of the self capacitance C of the medium voltage fuse. If Z of medium voltage fuse to be detected 1 、f 1 、f 2 And Z 2 Wherein the absolute value of the parameter variation ratio is greater than 10%, the internal state of the fuse is judged to be abnormal so as to detect the first maximum impedance Z of the medium voltage fuse 1 For example, the parameter varies by a proportion k Z The method comprises the following steps:
wherein Z is O1 Is the first maximum impedance of a standard medium voltage fuse. Other parameter change proportion calculating method and k Z Similarly, the description is not repeated here.
And 203, calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected, and the impedance-frequency curve and the impedance angle-frequency curve of the standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected.
And 204, judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
According to the method, an impedance analyzer scans the medium voltage fuse to be detected to obtain an impedance-frequency curve and an impedance angle-frequency curve, then an impedance similarity coefficient and an impedance angle similarity coefficient are calculated according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the standard medium voltage fuse, finally whether the medium voltage fuse to be detected is qualified or not is judged according to the impedance similarity coefficient and the impedance angle similarity coefficient, a quality detection result of the medium voltage fuse to be detected is obtained, equipment adopted in a detection process is simple, detection time is short, the detection result is not easily influenced by experimental conditions, accuracy is high, the technical problems that in the prior art, the quality detection of the fuse is carried out by adopting a rated current temperature rise experimental method, the method needs a plurality of professional equipment, the test process is complex, time consumption is long, and the influence of experimental conditions is easy, so that the test result dispersion of different testers is large, and the test result error is large are solved.
Further, the embodiment of the application determines the internal condition of the medium voltage fuse to be detected according to the impedance-frequency curve of the medium voltage fuse to be detected, can help a power maintenance worker to maintain the medium voltage fuse, avoids the waste caused by violent replacement, can avoid the expensive equipment with the X-ray scanning equipment, has the problem of radioactivity, and is low in cost and high in safety.
The foregoing is another embodiment of a medium voltage fuse quality detection method provided in the present application, and the following is an embodiment of a medium voltage fuse quality detection device provided in the present application.
Referring to fig. 6, a medium voltage fuse quality detection device provided in an embodiment of the present application includes:
the scanning unit is used for scanning the medium-voltage fuse to be detected through the impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium-voltage fuse to be detected;
the calculating unit is used for calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected and an impedance-frequency curve and an impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected;
and the judging unit is used for judging whether the medium-voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
As a further improvement, further comprising: an acquisition unit for
Acquiring a first maximum impedance value, a first frequency corresponding to the first maximum impedance value, a turning frequency of which the impedance is converted from capacitive to inductive and an impedance minimum corresponding to the turning frequency according to an impedance-frequency curve of the medium voltage fuse to be detected;
and determining the internal condition of the medium voltage fuse to be detected according to the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected.
As a further improvement, the judging unit is specifically configured to:
if the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified;
and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to a preset threshold value, judging that the medium voltage fuse to be detected is unqualified.
As a further improvement, the impedance analyzer scans the medium voltage fuse to be detected at a scanning frequency ranging from 50Hz to 120MHz.
According to the method, an impedance analyzer scans the medium voltage fuse to be detected to obtain an impedance-frequency curve and an impedance angle-frequency curve, then an impedance similarity coefficient and an impedance angle similarity coefficient are calculated according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the standard medium voltage fuse, finally whether the medium voltage fuse to be detected is qualified or not is judged according to the impedance similarity coefficient and the impedance angle similarity coefficient, a quality detection result of the medium voltage fuse to be detected is obtained, equipment adopted in a detection process is simple, detection time is short, the detection result is not easily influenced by experimental conditions, accuracy is high, the technical problems that in the prior art, the quality detection of the fuse is carried out by adopting a rated current temperature rise experimental method, the method needs a plurality of professional equipment, the test process is complex, time consumption is long, and the influence of experimental conditions is easy, so that the test result dispersion of different testers is large, and the test result error is large are solved.
Further, the embodiment of the application determines the internal condition of the medium voltage fuse to be detected according to the impedance-frequency curve of the medium voltage fuse to be detected, can help a power maintenance worker to maintain the medium voltage fuse, avoids the waste caused by violent replacement, can avoid the expensive equipment with the X-ray scanning equipment, has the problem of radioactivity, and is low in cost and high in safety.
The embodiment of the application also provides medium voltage fuse quality detection equipment, which comprises a processor and a memory;
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is configured to execute the medium voltage fuse quality detection method in the foregoing method embodiment according to instructions in the program code.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium is used for storing program codes, and the program codes are used for executing the medium voltage fuse quality detection method in the embodiment of the method.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the apparatus and units described above may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to execute all or part of the steps of the methods described in the embodiments of the present application by a computer device (which may be a personal computer, a server, or a network device, etc.). And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. The medium voltage fuse quality detection method is characterized by comprising the following steps:
scanning a medium voltage fuse to be detected through an impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected;
acquiring a first maximum impedance value, a first frequency corresponding to the first maximum impedance value, a turning frequency of capacitive inductance of impedance and an impedance minimum value corresponding to the turning frequency according to the impedance-frequency curve of the medium voltage fuse to be detected;
determining the internal condition of the medium voltage fuse to be detected according to the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected; specifically, if the absolute value of the change ratio of one parameter of the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected is greater than 10%, judging that the internal state of the medium voltage fuse to be detected is abnormal;
calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to an impedance-frequency curve and an impedance angle-frequency curve of the medium voltage fuse to be detected, and an impedance-frequency curve and an impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected;
specifically, the impedance similarity coefficient S 1 The calculation process of (1) is as follows:
wherein Z is k Z is the discrete impedance value obtained by scanning the medium voltage fuse k to be detected 0k The discrete impedance value obtained by scanning when the standard medium voltage fuse is put in storage is obtained, and N is the number of points of frequency scanning;
the impedance angle similarity coefficient S 2 The calculation process of (1) is as follows:
in θ k Discrete impedance angle theta obtained by scanning medium voltage fuse k to be detected 0k The discrete impedance angle is obtained by scanning when the standard medium voltage fuse with the same model as the medium voltage fuse k to be detected is put in storage;
and judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
2. The method for detecting the quality of the medium voltage fuse according to claim 1, wherein the step of judging whether the medium voltage fuse to be detected is qualified according to the impedance similarity coefficient and the impedance angle similarity coefficient comprises the steps of:
if the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified;
and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to the preset threshold value, judging that the medium voltage fuse to be detected is unqualified.
3. The medium voltage fuse quality detection method of claim 1 wherein the impedance analyzer scans the medium voltage fuse to be detected at a scanning frequency ranging from 50Hz to 120MHz.
4. A medium voltage fuse quality detection device, comprising:
the scanning unit is used for scanning the medium-voltage fuse to be detected through the impedance analyzer to obtain an impedance-frequency curve and an impedance angle-frequency curve of the medium-voltage fuse to be detected;
the acquisition unit is used for acquiring a first maximum impedance value, a first frequency corresponding to the first maximum impedance value, a turning frequency of capacitive inductance of impedance and an impedance minimum value corresponding to the turning frequency according to the impedance-frequency curve of the medium voltage fuse to be detected;
determining the internal condition of the medium voltage fuse to be detected according to the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected; specifically, if the absolute value of the change ratio of one parameter of the first maximum impedance value, the first frequency, the turning frequency and the minimum impedance value of the medium voltage fuse to be detected is greater than 10%, judging that the internal state of the medium voltage fuse to be detected is abnormal;
the calculating unit is used for calculating an impedance similarity coefficient and an impedance angle similarity coefficient according to the impedance-frequency curve and the impedance angle-frequency curve of the medium voltage fuse to be detected and the impedance-frequency curve and the impedance angle-frequency curve of a standard medium voltage fuse, wherein the standard medium voltage fuse is a qualified medium voltage fuse with the same model as the medium voltage fuse to be detected;
specifically, the impedance similarity coefficient S 1 The calculation process of (1) is as follows:
wherein Z is k Z is the discrete impedance value obtained by scanning the medium voltage fuse k to be detected 0k The discrete impedance value obtained by scanning when the standard medium voltage fuse is put in storage is obtained, and N is the number of points of frequency scanning;
the impedance angle similarity coefficient S 2 The calculation process of (1) is as follows:
in θ k Discrete impedance angle theta obtained by scanning medium voltage fuse k to be detected 0k The discrete impedance angle is obtained by scanning when the standard medium voltage fuse with the same model as the medium voltage fuse k to be detected is put in storage;
and the judging unit is used for judging whether the medium voltage fuse to be detected is qualified or not according to the impedance similarity coefficient and the impedance angle similarity coefficient.
5. The medium voltage fuse quality detection device of claim 4, wherein the determination unit is specifically configured to:
if the impedance similarity coefficient and the impedance angle similarity coefficient are both larger than a preset threshold value, judging that the medium voltage fuse to be detected is qualified;
and if the impedance similarity coefficient or the impedance angle similarity coefficient is smaller than or equal to the preset threshold value, judging that the medium voltage fuse to be detected is unqualified.
6. The medium voltage fuse quality inspection device of claim 4 wherein the impedance analyzer scans the medium voltage fuse to be inspected at a scanning frequency ranging from 50Hz to 120MHz.
7. A medium voltage fuse quality detection device, the device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the medium voltage fuse quality detection method of any one of claims 1-3 according to instructions in the program code.
8. A computer readable storage medium for storing a program code for performing the medium voltage fuse quality detection method of any one of claims 1-3.
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