CN115980654B - Current transformer detection method and system - Google Patents
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Abstract
The application relates to the technical field of sensor detection, and discloses a current transformer detection method and a system, wherein the current transformer detection method comprises the following steps: identifying marking information of the current transformer to be tested, wherein the marking information comprises model information, and matching corresponding performance parameters based on the model information; determining a primary test parameter and a primary test threshold parameter based on the performance parameter, wherein the primary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer; the primary test parameters are sent to test equipment to modulate primary test current for inputting a primary side coil of the current transformer, and primary detection parameters measured on current of a secondary side coil of the current transformer are received; comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result; the application has the effect of being convenient for improving the detection precision of the current transformer.
Description
Technical Field
The application relates to the technical field of sensor detection, in particular to a method and a system for detecting a current transformer.
Background
In the power generation, transformation, transmission, distribution and power consumption lines, the current in different lines is greatly different and needs to be converted into uniform weak current so as to be convenient for measurement, protection and control; the current transformer is an instrument for converting primary side large current into secondary side small current to measure the current according to the electromagnetic induction principle, the current transformer can play roles of current transformation and electric isolation in a circuit, and the core component is composed of a closed iron core and a winding and belongs to an electromagnetic device.
However, since the current transformer has a nonlinear characteristic, besides the self-inductance effect on the operation of the current transformer, residual magnetism is generated inside the current transformer when the current suddenly changes, which brings great difficulty to the detection and calibration of the current transformer.
As is apparent from the above related art, the conventional current transformer has a problem of low detection accuracy.
Disclosure of Invention
In order to facilitate improvement of detection accuracy of a current transformer, the application provides a current transformer detection method and a current transformer detection system.
The first technical scheme adopted by the application is as follows:
a current transformer detection method, comprising:
identifying marking information of the current transformer to be tested, wherein the marking information comprises model information, and matching corresponding performance parameters based on the model information;
Determining a primary test parameter and a primary test threshold parameter based on the performance parameter, wherein the primary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the primary test parameters are sent to test equipment to modulate primary test current for inputting a primary side coil of the current transformer, and primary detection parameters measured on current of a secondary side coil of the current transformer are received;
and comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
By adopting the technical scheme, the marking information is identified from the shell of the current transformer to be tested, wherein the marking information comprises model information, and the performance parameters of the current transformer to be tested are obtained from the product catalog according to the model information; determining a current value of a required input when testing the current transformer based on the performance parameter, thereby generating a primary test parameter, wherein the primary test parameter comprises a plurality of stages of current data set based on a rated current value percentage of the current transformer; and after the primary test current is input into the primary side coil of the current transformer, receiving the primary detection parameter measured from the secondary side coil of the current transformer, and comparing the primary detection parameter with the primary test threshold parameter so as to judge whether the current transformer to be tested is qualified or not to generate a primary test result.
The present application is in a preferred example: the marking information comprises identification information, the primary detection parameter is compared with the primary test threshold parameter, and after the step of generating a primary test result, the marking information comprises the following steps:
if the primary test result is unqualified, generating a secondary test signal, and storing primary test parameters and identification information into a test database;
determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, wherein the secondary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer to be tested;
the secondary test parameters are sent to test equipment, and secondary detection parameters measured on the current of a secondary side coil of the current transformer are received;
and comparing the secondary detection parameter with the secondary test threshold parameter, and generating a reworked secondary test result if the secondary detection parameter exceeds the secondary test threshold parameter.
By adopting the technical scheme, the marking information comprises the unique identification information of the current transformer to be tested, and if the primary test result is unqualified, a secondary test signal is generated, so that the current transformer to be tested can be retested conveniently, and the performance condition of the current transformer to be tested can be verified conveniently; the primary test parameters and the identification information are stored in a test database, so that the primary test parameters can be conveniently fetched according to the identification information of the current transformer to be tested; and determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, modulating a secondary test current based on the secondary test parameter, receiving a corresponding secondary detection parameter, comparing the secondary detection parameter with the secondary test threshold parameter, and if the secondary detection parameter exceeds the secondary test threshold parameter, considering that the current transformer to be tested does not pass the secondary test and needs to be reworked, thereby generating a reworked secondary test result.
The present application is in a preferred example: after the step of generating the reworked secondary test result, the method further comprises the following steps:
generating a detection report based on the primary test parameter, the secondary test parameter and the identification information of the current transformer to be detected;
and sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected.
By adopting the technical scheme, when the current transformer to be tested needs to be reworked, the corresponding primary test parameters and secondary test parameters are acquired based on the identification information of the current transformer so as to generate a detection report of the current transformer to be tested, thereby being convenient for recording the disqualification condition of the current transformer to be tested; and sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected, so that workers can know unqualified items of each reworked current transformer conveniently, and the targeted reworking flow is carried out conveniently.
The present application is in a preferred example: after the step of comparing the secondary detection parameter with the secondary test threshold parameter, the method further comprises:
if the secondary detection parameter does not exceed the secondary test threshold parameter, generating a re-evaluation signal as a secondary test result;
the primary test parameters are called, and the maximum deviation rate of the secondary test parameters relative to the primary test parameters is calculated;
Comparing the maximum deviation rate with a precision grade threshold value group to determine the testing precision grade of the current transformer to be tested;
and if the testing precision grade is smaller than the precision grade corresponding to the current transformer to be tested, changing the model information of the current transformer to be tested based on the testing precision grade.
By adopting the technical scheme, if the secondary detection parameter does not exceed the secondary test threshold parameter, the accuracy of the current transformer to be tested is considered acceptable, and a re-evaluation signal is generated as a secondary test result so as to further evaluate the current transformer to be tested; according to the identification information of the current transformer to be tested, the corresponding primary test parameters are called, and the maximum deviation rate of the secondary test parameters relative to the primary test parameters is calculated based on the primary test parameters and the secondary test parameters so as to judge the deviation condition of the current transformer to be tested and the primary test in the secondary test, so that the deviation condition of the current transformer to be tested in the repeated test is evaluated; comparing the maximum deviation rate with a precision grade threshold value group, thereby determining the testing precision grade of the current transformer to be tested according to the maximum deviation rate of the current transformer to be tested, comparing the testing precision grade measured in the reevaluation stage with the precision grade corresponding to the model of the current transformer to be tested, and if the testing precision grade is smaller than the precision grade corresponding to the model of the current transformer to be tested, changing the model information of the current transformer to be tested based on the testing precision grade so as to achieve the effect of degrading the precision grade of the current transformer to be tested.
The present application is in a preferred example: comparing the maximum deviation rate with a precision grade threshold value group, and after the step of determining the testing precision grade of the current transformer to be tested, further comprising:
if the testing precision grade is greater than or equal to the precision grade corresponding to the current transformer to be tested, generating a recalibration signal;
determining calibration test parameters based on performance parameters, wherein the calibration test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
transmitting the calibration test parameters to test equipment, and receiving calibration detection parameters measured on the current of the secondary side coil of the current transformer;
and calculating the calibration multiplying power information of the current transformer to be measured in each current interval based on the calibration test parameters and the calibration detection parameters, and writing the calibration multiplying power information into a signal conversion chip of the current transformer to be measured.
After determining the testing precision grade of the current transformer to be tested by adopting the technical scheme, if the testing precision grade is greater than or equal to the precision grade corresponding to the model of the current transformer to be tested, the precision of the sensor to be tested is considered to be in accordance with the precision requirement of the model, recalibration processing can be performed to generate a recalibration signal so as to recalibrate the current transformer to be tested; determining calibration test parameters based on performance parameters, wherein the calibration test parameters are based on a plurality of levels of current data set by the current transformer rated current numerical percentage, and based on the calibration test parameters, controlling test equipment to modulate corresponding calibration test currents to be input into a current transformer to be tested, and receiving calibration detection parameters obtained by testing the current transformer output currents; and calculating multiplying power data between the calibration detection parameters and the calibration test parameters as calibration multiplying power information to determine the actual conversion multiplying power of the current transformer to be measured, and writing the calibration multiplying power information into a signal conversion chip of the current transformer to be measured so as to perform multiplying power conversion on the current measured by a secondary side coil of the current transformer according to the calibration multiplying power information, thereby achieving the effect of recalibrating the current transformer.
The present application is in a preferred example: before the step of determining the primary test parameter and the primary test threshold parameter based on the performance parameter, comprising:
acquiring a corresponding precision grade and a corresponding multiplying power characteristic curve based on model information of the current transformer to be tested;
and determining a primary test parameter and a corresponding primary test threshold parameter based on the multiplying power characteristic curve and the precision grade.
By adopting the technical scheme, after the model information of the current transformer to be measured is obtained, determining the corresponding precision grade and the corresponding transformation multiplying power characteristic curve of the current transformer to be measured through a technical manual based on the model information so as to acquire the precision requirement and the transformation multiplying power characteristic of the current transformer; based on the multiplying power characteristic curve and the precision grade, determining a primary test parameter and a corresponding primary test threshold parameter when the current transformer to be tested is tested, so that a primary test work is executed according to the precision requirement of the current transformer to be tested.
The present application is in a preferred example: and sending the secondary test parameters to test equipment, and performing secondary test of the current transformer for a plurality of times according to each group of secondary test parameters in the step of receiving the secondary detection parameters measured on the secondary coil current of the current transformer.
By adopting the technical scheme, the secondary test of the current transformer is carried out for a plurality of times aiming at each group of secondary parameters, so that more test parameters are obtained in the secondary test to form the secondary test parameters, and more accurate secondary test results are conveniently obtained after the secondary test parameters are analyzed later.
The second object of the application is realized by the following technical scheme:
a current transformer detection system comprising:
the marking information identification module is used for identifying marking information of the current transformer to be tested, the marking information comprises model information, and corresponding performance parameters are matched based on the model information;
the primary test data acquisition module is used for determining primary test parameters and primary test threshold parameters based on performance parameters, wherein the primary test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the primary test execution module is used for sending the primary test parameters to test equipment to modulate primary test current for inputting a primary side coil of the current transformer and receiving primary detection parameters measured on a secondary side coil current of the current transformer;
and the primary test result generation module is used for comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
By adopting the technical scheme, the marking information is identified from the shell of the current transformer to be tested, wherein the marking information comprises model information, and the performance parameters of the current transformer to be tested are obtained from the product catalog according to the model information; determining a current value of a required input when testing the current transformer based on the performance parameter, thereby generating a primary test parameter, wherein the primary test parameter comprises a plurality of stages of current data set based on a rated current value percentage of the current transformer; and after the primary test current is input into the primary side coil of the current transformer, receiving the primary detection parameter measured from the secondary side coil of the current transformer, and comparing the primary detection parameter with the primary test threshold parameter so as to judge whether the current transformer to be tested is qualified or not to generate a primary test result.
The third object of the application is realized by the following technical scheme:
a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the current transformer detection method described above when the computer program is executed.
The fourth object of the application is realized by the following technical scheme:
a computer readable storage medium storing a computer program which when executed by a processor implements the steps of the current transformer detection method described above.
In summary, the present application includes at least one of the following beneficial technical effects:
1. identifying mark information from a shell of the current transformer to be tested, wherein the mark information comprises model information, and acquiring performance parameters of the current transformer to be tested from a product catalog according to the model information; determining a current value of a required input when testing the current transformer based on the performance parameter, thereby generating a primary test parameter, wherein the primary test parameter comprises a plurality of stages of current data set based on a rated current value percentage of the current transformer; and after the primary test current is input into the primary side coil of the current transformer, receiving the primary detection parameter measured from the secondary side coil of the current transformer, and comparing the primary detection parameter with the primary test threshold parameter so as to judge whether the current transformer to be tested is qualified or not to generate a primary test result.
2. The marking information comprises unique identification information of the current transformer to be tested, and if the primary test result is unqualified, a secondary test signal is generated, so that the current transformer to be tested can be retested conveniently, and the performance condition of the current transformer to be tested can be verified conveniently; the primary test parameters and the identification information are stored in a test database, so that the primary test parameters can be conveniently fetched according to the identification information of the current transformer to be tested; and determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, modulating a secondary test current based on the secondary test parameter, receiving a corresponding secondary detection parameter, comparing the secondary detection parameter with the secondary test threshold parameter, and if the secondary detection parameter exceeds the secondary test threshold parameter, considering that the current transformer to be tested does not pass the secondary test and needs to be reworked, thereby generating a reworked secondary test result.
3. When the current transformer to be tested needs to be reworked, acquiring corresponding primary test parameters and secondary test parameters based on the identification information of the current transformer so as to generate a detection report of the current transformer to be tested, thereby being convenient for recording the disqualification condition of the current transformer to be tested; and sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected, so that workers can know unqualified items of each reworked current transformer conveniently, and the targeted reworking flow is carried out conveniently.
Drawings
Fig. 1 is a flowchart of a current transformer detection method according to a first embodiment of the present application.
Fig. 2 is another flow chart of the current transformer detection method of the present application.
Fig. 3 is a flowchart of step S80 in the current transformer detection method of the present application.
Fig. 4 is another flow chart of the current transformer detection method of the present application.
Fig. 5 is a flowchart of step S110 in the current transformer detection method of the present application.
Fig. 6 is a schematic block diagram of a current transformer detection system according to a second embodiment of the present application.
Fig. 7 is a schematic view of an apparatus according to a third embodiment of the present application.
Detailed Description
The application is described in further detail below with reference to fig. 1 to 7.
The application discloses a current transformer detection method and a current transformer detection system.
Example 1
The application discloses a current transformer detection method which can be applied to quality detection of a current transformer so as to determine whether the current transformer is qualified or not and further analyze and process the current transformer which is unqualified.
As shown in fig. 1, the method specifically comprises the following steps:
s10: identifying the marking information of the current transformer to be tested, wherein the marking information comprises model information, and matching corresponding performance parameters based on the model information.
In this embodiment, the marking information refers to information of spraying marks on the surface of the shell of the current transformer to be tested, including model information and identification information, each current transformer to be tested has unique identification information, and the identification information is a group of numbers.
Specifically, identifying marking information on the surface of the shell of the current transformer to be tested through the shooting device, wherein the marking information comprises model information, matching a technical manual of the current transformer of a corresponding model from a technical manual library according to the model information, and acquiring performance parameter information corresponding to the current transformer to be tested from the technical manual.
S20: a primary test parameter and a primary test threshold parameter are determined based on the performance parameter, the primary test parameter including a number of levels of current data set based on a current transformer rated current value percentage.
In the present embodiment, the performance parameters include information such as rated current, precision level, and rate characteristic curve.
Wherein, in step S20, the specific steps of determining the primary test parameter and the primary test threshold parameter based on the performance parameter include:
s21: and acquiring a corresponding precision grade and a corresponding multiplying power characteristic curve based on the model information of the current transformer to be tested.
In this embodiment, the magnification characteristic curve refers to a curve of the current in the secondary side coil as a function of the current in the primary side coil.
Specifically, since the current transformer is that the current in the secondary side coil is not completely linear with the current change condition in the primary side coil when the measured current is, the current transformer has a rate characteristic curve; and acquiring performance parameters of the current transformer based on the acquired model information of the current transformer, wherein the performance parameters comprise the precision grade and the multiplying power characteristic curve of the current transformer to be tested.
S22: and determining a primary test parameter and a corresponding primary test threshold parameter based on the multiplying power characteristic curve and the precision grade.
In this embodiment, the primary test parameters include several levels of current data set based on the current transformer rated current value percentages.
Specifically, after model information of the current transformer to be measured is obtained, determining the corresponding precision grade of the current transformer to be measured and a corresponding transformation multiplying power characteristic curve according to the model information through a technical manual so as to acquire the precision requirement and transformation multiplying power characteristic of the current transformer, wherein the multiplying power transformation characteristic curve can be obtained by carrying out experiments on a large number of qualified current transformers of the model; determining error rates of the current transformers to be tested in all current test intervals based on the precision grades of the current transformers to be tested; and setting a primary test threshold parameter based on the maximum error rate corresponding to the multiplying power characteristic curve and the precision grade.
Specifically, determining a current value required to be input when testing the current transformer based on the performance parameters, so as to generate primary test parameters, and calculating corresponding primary test threshold parameters according to the primary test parameters, the multiplying power characteristic curve and the precision level; for example, for a current transformer for measurement, if the rated maximum measurement current is 10A, the primary test parameters for the current transformer may be set to 1A, 2A, 3A, 4A, 5A, 6A, 7A, 8A, 9A, 10A; assuming that the transformation ratio of the current transformer to be tested is 5:1 and the maximum error rate of the current transformer to be tested in the whole rated current range is 0.5%, the primary test threshold parameters are set to be 0.2+/-0.001, 0.4+/-0.002, 0.6+/-0.003, 0.8+/-0.004, 1+/-0.005, 1.2+/-0.006, 1.4+/-0.007, 1.6+/-0.008, 1.8+/-0.009 and 2+/-0.01, so that the primary test work can be conveniently executed according to the accuracy requirement of the current transformer to be tested.
S30: and sending the primary test parameters to test equipment to modulate primary test current for inputting the primary side coil of the current transformer, and receiving primary detection parameters measured on the current of the secondary side coil of the current transformer.
In this embodiment, the test device refers to a device for modulating a corresponding current according to an input parameter.
Specifically, primary test parameters are sent to test equipment to control the test equipment to modulate primary test current for executing primary test work, the primary test current is sent to a primary side coil of a current transformer, the primary test current is subjected to multiplying power conversion in the current transformer, the current subjected to multiplying power conversion is generated in a secondary side coil, the current in the secondary side coil of the current transformer is detected, the detected current value is used as a primary detection parameter, and whether the current transformer to be tested is qualified or not is judged according to the detected primary detection parameter and a primary test threshold value.
S40: and comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
In this embodiment, the primary test result refers to a result of a primary test operation performed on the current transformer to be tested, which is determined according to a relationship between a primary detection parameter and a primary test threshold parameter.
Specifically, comparing each current value in the primary detection parameter with a corresponding value in the primary test threshold parameter, thereby judging whether the current transformer to be tested is qualified or not to generate a primary test result; if the values of all the primary detection parameters do not exceed the primary test threshold parameters, the primary test result is qualified; for example, when the primary test parameters are 1A, 2A, 3A, 4A, 5A, 6A, 7A, 8A, 9A, and 10A, the currents of the corresponding test points in the primary test parameters are within the ranges of 0.2±0.001, 0.4±0.002, 0.6±0.003, 0.8±0.004, 1±0.005, 1.2±0.006, 1.4±0.007, 1.6±0.008, 1.8±0.009, and 2±0.01, respectively, then a qualified primary test result is generated.
Referring to fig. 2, after step S40, the current transformer detection method further includes:
s50: if the primary test result is unqualified, generating a secondary test signal, and storing the primary test parameters and the identification information into a test database.
In this embodiment, the secondary test signal refers to a signal for triggering execution of a secondary test job; the test database is a database for storing test data acquired during each test operation.
Specifically, if the primary test result is unqualified, a secondary test signal is generated, so that the current transformer to be tested is conveniently retested, and the performance condition of the current transformer to be tested is conveniently verified; and storing the primary test parameters and the identification information of the current transformer to be tested in a test database, so that the primary test parameters of the corresponding current transformer can be conveniently called according to the identification information of the current transformer to be tested, and the primary test parameters participate in subsequent test work.
S60: and determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, wherein the secondary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer to be tested.
In this embodiment, the secondary test parameters include several levels of current data set based on the current transformer rated current value percentages.
Specifically, determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, wherein the specific steps can refer to the acquisition methods of the primary test parameter and the secondary test threshold parameter; the accuracy requirement of the secondary test threshold parameter is lower than that of the primary test threshold parameter, the secondary test threshold parameter is determined according to the minimum accuracy level requirement of the current transformer product, for example, the current transformer product produced by the enterprise comprises three accuracy levels, and the maximum error rate of each accuracy level is respectively 0.2%, 0.5% and 1.0%, and the secondary test threshold parameter is determined according to the accuracy requirement that the maximum error rate is 1.0%.
S70: and sending the secondary test parameters to test equipment, and receiving secondary detection parameters measured on the current of the secondary side coil of the current transformer.
Specifically, the secondary test parameters are sent to the test equipment so as to control the test equipment to modulate secondary test current for executing secondary test work, the secondary test current is sent to a primary side coil of the current transformer, the secondary test current is subjected to multiplying power conversion in the current transformer, the current subjected to multiplying power conversion is generated in the secondary side coil, the current in the secondary side coil of the current transformer is detected, the detected current value is used as a secondary detection parameter, and whether the current transformer to be tested is qualified or not is judged according to the detected secondary detection parameter and a secondary test threshold value.
In this embodiment, the number of execution times of the secondary test work is one; in other embodiments of the present application, the number of times of execution of the secondary test operation may be multiple times, so as to improve accuracy of the secondary test parameters obtained in the secondary test operation and current data in the actual secondary side coil of the current transformer.
S80: and comparing the secondary detection parameter with the secondary test threshold parameter, and generating a reworked secondary test result if the secondary detection parameter exceeds the secondary test threshold parameter.
In this embodiment, the secondary test result refers to a result of a secondary test operation performed on the current transformer to be tested, which is determined according to a relationship between a secondary detection parameter and a secondary test threshold parameter.
Specifically, comparing each current value in the secondary detection parameter with a corresponding value in the secondary test threshold parameter, thereby judging whether the current transformer to be tested is qualified or not to generate a secondary test result; if the numerical value of any secondary detection parameter exceeds the secondary test threshold parameter, the actual precision of the current transformer to be tested cannot meet the requirement of the lowest precision level of the current transformer product produced by the enterprise, and the current transformer to be tested fails the secondary test, so that a secondary test result of reworking is generated, and the current transformer to be tested is reworked.
Referring to fig. 3, in step S80, the method includes:
s81: and generating a detection report based on the primary test parameter, the secondary test parameter and the identification information of the current transformer to be detected.
Specifically, based on the identification information of the current transformer to be tested, the primary test parameter, the secondary test parameter and the identification information corresponding to the current transformer to be tested are used for generating a detection report, so that the unqualified condition of the current transformer to be tested can be recorded conveniently.
S82: and sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected.
Specifically, when the current transformer to be tested needs to be reworked, a detection report is sent to a workshop terminal of a reworking workshop corresponding to the current transformer to be tested, so that workers can conveniently learn unqualified items of each reworked current transformer, and a targeted reworking flow is conveniently carried out.
Referring to fig. 4, after step S80, the current transformer detection method further includes:
s90: and if the secondary detection parameter does not exceed the secondary test threshold parameter, generating a re-evaluation signal as a secondary test result.
In this embodiment, the re-evaluation signal refers to a signal for further evaluating the test work on the current transformer to be tested.
Specifically, if the values of all the secondary detection parameters do not exceed the secondary test threshold parameters, the accuracy of the current transformer to be tested is considered acceptable, and degradation processing of the accuracy level can be performed, so that a re-evaluation signal is generated as a secondary test result to further evaluate the current transformer to be tested.
S100: and calling the primary test parameters, and calculating the maximum deviation rate of the secondary test parameters relative to the primary test parameters.
Specifically, the corresponding primary test parameters are called according to the identification information of the current transformer to be tested, and the maximum deviation rate of the secondary test parameters relative to the primary test parameters is calculated based on the primary test parameters and the secondary test parameters so as to judge the deviation condition of the current transformer to be tested and the primary test in the secondary test and evaluate the deviation condition of the current transformer to be tested during repeated test.
Specifically, for example, referring to the current transformer mentioned in step S40, if the primary test parameters of the current transformer are 0.401, 0.802, 1.203, 1.604, 2.005, respectively; and the secondary test parameters are respectively 0.401, 0.802, 1.203, 1.608 and 2.005, the maximum deviation rate is as follows:
i 1.604-1.608 i 1.604=0.25%.
S110: and comparing the maximum deviation rate with a precision grade threshold value group to determine the testing precision grade of the current transformer to be tested.
In this embodiment, the precision level threshold set is used to compare with the maximum deviation rate of the secondary test parameter relative to the primary test parameter, so as to evaluate the deviation degree between the data measured by the current transformer to be tested in each test, for example, the precision level threshold set of the current transformer to be tested may include 0.2%, 0.5%, 1.0% and other data to respectively correspond to the product precision level of the current transformer.
Specifically, comparing the maximum deviation rate with a precision grade threshold value group, so as to determine the testing precision grade of the current transformer to be tested according to the maximum deviation rate of the current transformer to be tested; for example, when the calculation result of the maximum deviation rate is 0.25%, determining that the testing precision grade of the current transformer to be tested is the grade corresponding to 0.5%.
Referring to fig. 5, in step S110, the method includes:
s111: and if the testing precision grade is greater than or equal to the precision grade corresponding to the current transformer to be tested, generating a recalibration signal.
In this embodiment, the recalibration signal refers to a signal for performing recalibration operation on the current transformer to be measured.
Specifically, after determining the test precision level of the current transformer to be tested, if the test precision level is greater than or equal to the precision level corresponding to the model of the current transformer to be tested, the current transformer to be tested cannot pass through one test operation, but the deviation degree between measured data in each test process is smaller, the precision of the sensor to be tested meets the precision requirement of the model, and only the multiplying power characteristic curve is abnormal, recalibration processing can be performed, and a recalibration signal is generated to recalibrate the current transformer to be tested.
S112: calibration test parameters are determined based on the performance parameters, and include a plurality of levels of current data set based on the current transformer rated current value percentages.
In this embodiment, the calibration test parameter refers to a parameter for modulating a calibration test current when the current transformer to be tested is recalibrated; the calibration test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
specifically, calibration test parameters are determined based on performance parameters, so that the calibration test current is conveniently modulated according to the calibration test parameters, and calibration test work is executed.
S113: and sending the calibration test parameters to test equipment, and receiving calibration detection parameters measured on the current of the secondary side coil of the current transformer.
Specifically, the calibration test parameters are sent to the test equipment, the test equipment is controlled to modulate corresponding calibration test current based on the calibration test parameters so as to input the corresponding calibration test current into the current transformer to be tested, and the calibration detection parameters obtained by testing the current in the secondary side coil of the current transformer are received, so that the current transformer to be tested can be conveniently and subsequently recalibrated according to the calibration detection parameters.
S114: and calculating the calibration multiplying power information of the current transformer to be measured in each current interval based on the calibration test parameters and the calibration detection parameters, and writing the calibration multiplying power information into a signal conversion chip of the current transformer to be measured.
In this embodiment, the calibration rate information refers to rate information for calibrating each measured current interval of the current transformer to be measured; the signal conversion chip is a chip for calculating and outputting a primary coil current value according to the current measured by the secondary coil, and stores conversion rate information of the primary coil current and the secondary coil current.
Specifically, multiplying power data between the calibration detection parameters and the calibration test parameters of the input current in each current value interval are calculated to be calibration multiplying power information, so that the actual conversion multiplying power of the current transformer to be measured in each current value interval of the input current is determined, the calibration multiplying power information is written into a signal conversion chip of the current transformer to be measured, and then the current measured by a secondary side coil of the current transformer is subjected to multiplying power conversion according to the calibration multiplying power information, so that the effect of recalibrating the current transformer is achieved.
S120: and if the testing precision grade is smaller than the precision grade corresponding to the current transformer to be tested, changing the model information of the current transformer to be tested based on the testing precision grade.
Specifically, comparing the test precision grade measured in the reevaluation stage with the precision grade corresponding to the model of the current transformer to be tested, and if the test precision grade is smaller than the precision grade corresponding to the model of the current transformer to be tested, changing the model information of the current transformer to be tested based on the test precision grade so as to achieve the effect of degrading the precision grade of the current transformer to be tested; for example, the maximum deviation rate of the precision requirement corresponding to the model information of the current transformer to be tested is 0.2%, and the maximum deviation rate of the precision requirement corresponding to the testing precision grade is 0.5%, and the model information of the current transformer to be tested needs to be modified into the model corresponding to the precision grade with the maximum deviation rate of 0.5%.
It should be understood that the sequence number of each step in the above embodiment does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiment of the present application.
Example two
As shown in fig. 6, the present application discloses a current transformer detection system for performing the steps of the current transformer detection method described above, which corresponds to the current transformer detection method in the above-described embodiment.
The current transformer detection system comprises a marking information identification module, a primary test data acquisition module, a primary test execution module and a primary test result generation module. The detailed description of each functional module is as follows:
the marking information identification module is used for identifying marking information of the current transformer to be tested, the marking information comprises model information, and corresponding performance parameters are matched based on the model information;
the primary test data acquisition module is used for determining primary test parameters and primary test threshold parameters based on performance parameters, wherein the primary test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
The primary test execution module is used for sending the primary test parameters to test equipment to modulate primary test current for inputting a primary side coil of the current transformer and receiving primary detection parameters measured on a secondary side coil current of the current transformer;
and the primary test result generation module is used for comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
The primary test data acquisition module comprises:
the performance data acquisition sub-module is used for acquiring corresponding precision grade and multiplying power characteristic curves based on model information of the current transformer to be tested;
and the primary test data generation sub-module is used for determining primary test parameters and corresponding primary test threshold parameters based on the multiplying power characteristic curve and the precision grade.
Wherein, current transformer detecting system still includes:
the secondary test signal generating module is used for generating a secondary test signal if the primary test result is unqualified, and storing primary test parameters and identification information into a test database;
the secondary test data acquisition module is used for determining secondary test parameters and secondary test threshold parameters based on performance parameters, wherein the secondary test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer to be tested;
The secondary test execution module is used for sending the secondary test parameters to test equipment and receiving secondary detection parameters measured on the secondary side coil current of the current transformer;
the secondary test result generation module is used for comparing the secondary detection parameter with the secondary test threshold parameter, and generating a reworked secondary test result if the secondary detection parameter exceeds the secondary test threshold parameter;
the re-evaluation signal generation module is used for generating a re-evaluation signal as a secondary test result if the secondary detection parameter does not exceed the secondary test threshold parameter;
the maximum deviation rate calculation module is used for retrieving the primary test parameters and calculating the maximum deviation rate of the secondary test parameters relative to the primary test parameters;
the testing precision grade determining module is used for comparing the maximum deviation rate with a precision grade threshold value group and determining the testing precision grade of the current transformer to be tested;
and the model information changing module is used for changing the model information of the current transformer to be tested based on the testing precision grade if the testing precision grade is smaller than the precision grade corresponding to the current transformer to be tested.
The secondary test result generating module comprises:
the detection report generation sub-module is used for generating a detection report based on the primary test parameter, the secondary test parameter and the identification information of the current transformer to be detected;
And the detection report sending sub-module is used for sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected.
The test precision grade determining module comprises:
the recalibration signal generation sub-module is used for generating a recalibration signal if the testing precision grade is greater than or equal to the precision grade corresponding to the current transformer to be tested;
the calibration test parameter determining submodule is used for determining calibration test parameters based on performance parameters, and the calibration test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the calibration test execution sub-module is used for sending the calibration test parameters to test equipment and receiving calibration detection parameters measured on the current of the secondary side coil of the current transformer;
the calibration rate information generation sub-module is used for calculating the calibration rate information of the current transformer to be tested in each current interval based on the calibration test parameters and the calibration detection parameters, and writing the calibration rate information into the signal conversion chip of the current transformer to be tested.
Example III
A computer device, which may be a server, may have an internal structure as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer equipment is used for storing data such as marking information, performance parameters, primary test threshold parameters, primary detection parameters, primary test results, secondary test signals, secondary test parameters, secondary test threshold parameters, secondary detection results and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a current transformer detection method.
In one embodiment, a computer device is provided comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
s10: identifying marking information of the current transformer to be tested, wherein the marking information comprises model information, and matching corresponding performance parameters based on the model information;
s20: determining a primary test parameter and a primary test threshold parameter based on the performance parameter, wherein the primary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
s30: the primary test parameters are sent to test equipment to modulate primary test current for inputting a primary side coil of the current transformer, and primary detection parameters measured on current of a secondary side coil of the current transformer are received;
s40: and comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
s10: identifying marking information of the current transformer to be tested, wherein the marking information comprises model information, and matching corresponding performance parameters based on the model information;
S20: determining a primary test parameter and a primary test threshold parameter based on the performance parameter, wherein the primary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
s30: the primary test parameters are sent to test equipment to modulate primary test current for inputting a primary side coil of the current transformer, and primary detection parameters measured on current of a secondary side coil of the current transformer are received;
s40: and comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink), DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme described in the foregoing embodiments can be modified or some of the features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (7)
1. A current transformer detection method, comprising:
identifying marking information of the current transformer to be tested, wherein the marking information comprises model information, matching a technical manual of the current transformer with a corresponding model from a technical manual library based on the model information, and acquiring performance parameters corresponding to the current transformer to be tested, wherein the performance parameters comprise rated current, precision grade and multiplying power characteristic curve;
Determining a primary test parameter and a primary test threshold parameter based on the performance parameter, wherein the primary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the primary test parameters are sent to test equipment to modulate primary test current for inputting a primary side coil of the current transformer, and primary detection parameters measured on current of a secondary side coil of the current transformer are received;
comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result;
the step of comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result comprises the following steps:
if the primary test result is unqualified, generating a secondary test signal, and storing primary test parameters and identification information into a test database;
determining a secondary test parameter and a secondary test threshold parameter based on the performance parameter, wherein the secondary test parameter comprises a plurality of levels of current data set based on the rated current numerical percentage of the current transformer to be tested;
the secondary test parameters are sent to test equipment, and secondary detection parameters measured on the current of a secondary side coil of the current transformer are received;
Comparing the secondary detection parameter with the secondary test threshold parameter, and if the secondary detection parameter exceeds the secondary test threshold parameter, generating a reworked secondary test result;
after the step of comparing the secondary detection parameter with the secondary test threshold parameter, the method further comprises:
if the secondary detection parameter does not exceed the secondary test threshold parameter, generating a re-evaluation signal as a secondary test result;
the primary test parameters are called, and the maximum deviation rate of the secondary test parameters relative to the primary test parameters is calculated;
comparing the maximum deviation rate with a precision grade threshold value group, and determining the testing precision grade of the current transformer to be tested, wherein the precision grade threshold value group is used for comparing the maximum deviation rate of the secondary testing parameter relative to the primary testing parameter so as to evaluate the deviation degree of the current transformer to be tested among data measured in each test;
if the testing precision grade is smaller than the corresponding precision grade of the current transformer to be tested, changing the model information of the current transformer to be tested based on the testing precision grade;
the step of comparing the maximum deviation rate with a precision level threshold value group and determining the testing precision level of the current transformer to be tested further comprises the following steps:
If the testing precision grade is greater than or equal to the precision grade corresponding to the current transformer to be tested, generating a recalibration signal;
determining calibration test parameters based on performance parameters, wherein the calibration test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
transmitting the calibration test parameters to test equipment, and receiving calibration detection parameters measured on the current of the secondary side coil of the current transformer;
calculating the calibration rate information of the current transformer to be measured in each current interval based on the calibration test parameters and the calibration detection parameters, and writing the calibration rate information into a signal conversion chip of the current transformer to be measured, wherein the calibration rate information refers to the rate information for calibrating each measured current interval of the current transformer to be measured; the signal conversion chip is a chip for calculating and outputting a primary coil current value according to the current measured by the secondary coil, and stores conversion rate information of the primary coil current and the secondary coil current.
2. The current transformer detection method according to claim 1, wherein: after the step of generating the reworked secondary test result, the method further comprises the following steps:
Generating a detection report based on the primary test parameter, the secondary test parameter and the identification information of the current transformer to be detected;
and sending the detection report to a workshop terminal of a reworking workshop corresponding to the current transformer to be detected.
3. The current transformer detection method according to claim 1, wherein: before the step of determining the primary test parameter and the primary test threshold parameter based on the performance parameter, comprising:
acquiring a corresponding precision grade and a corresponding multiplying power characteristic curve based on model information of the current transformer to be tested;
and determining a primary test parameter and a corresponding primary test threshold parameter based on the multiplying power characteristic curve and the precision grade.
4. The current transformer detection method according to claim 1, wherein: and sending the secondary test parameters to test equipment, and performing secondary test of the current transformer for a plurality of times according to each group of secondary test parameters in the step of receiving the secondary detection parameters measured on the secondary coil current of the current transformer.
5. A current transformer detection system, comprising:
the marking information identification module is used for identifying marking information of the current transformer to be tested, the marking information comprises model information, and corresponding performance parameters are matched based on the model information;
The primary test data acquisition module is used for determining primary test parameters and primary test threshold parameters based on performance parameters, wherein the primary test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the primary test execution module is used for sending the primary test parameters to test equipment to modulate primary test current for inputting a primary side coil of the current transformer and receiving primary detection parameters measured on a secondary side coil current of the current transformer;
the primary test result generation module is used for comparing the primary detection parameter with the primary test threshold parameter to generate a primary test result;
wherein, current transformer detecting system still includes:
the secondary test signal generating module is used for generating a secondary test signal if the primary test result is unqualified, and storing primary test parameters and identification information into a test database;
the secondary test data acquisition module is used for determining secondary test parameters and secondary test threshold parameters based on performance parameters, wherein the secondary test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer to be tested;
The secondary test execution module is used for sending the secondary test parameters to test equipment and receiving secondary detection parameters measured on the secondary side coil current of the current transformer;
the secondary test result generation module is used for comparing the secondary detection parameter with the secondary test threshold parameter, and generating a reworked secondary test result if the secondary detection parameter exceeds the secondary test threshold parameter;
the re-evaluation signal generation module is used for generating a re-evaluation signal as a secondary test result if the secondary detection parameter does not exceed the secondary test threshold parameter;
the maximum deviation rate calculation module is used for retrieving the primary test parameters and calculating the maximum deviation rate of the secondary test parameters relative to the primary test parameters;
the testing precision grade determining module is used for comparing the maximum deviation rate with a precision grade threshold value group and determining the testing precision grade of the current transformer to be tested;
the model information changing module is used for changing the model information of the current transformer to be tested based on the testing precision grade if the testing precision grade is smaller than the corresponding precision grade of the current transformer to be tested;
the test precision grade determining module comprises:
the recalibration signal generation sub-module is used for generating a recalibration signal if the testing precision grade is greater than or equal to the precision grade corresponding to the current transformer to be tested;
The calibration test parameter determining submodule is used for determining calibration test parameters based on performance parameters, and the calibration test parameters comprise a plurality of levels of current data set based on the rated current numerical percentage of the current transformer;
the calibration test execution sub-module is used for sending the calibration test parameters to test equipment and receiving calibration detection parameters measured on the current of the secondary side coil of the current transformer;
the calibration rate information generation sub-module is used for calculating the calibration rate information of the current transformer to be tested in each current interval based on the calibration test parameters and the calibration detection parameters, and writing the calibration rate information into the signal conversion chip of the current transformer to be tested.
6. A computer 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 current transformer detection method according to any one of claims 1 to 4 when the computer program is executed.
7. 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 current transformer detection method according to any one of claims 1 to 4.
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