CN113804989A - Method, device, equipment and storage medium for calibrating variable ratio group tester - Google Patents

Method, device, equipment and storage medium for calibrating variable ratio group tester Download PDF

Info

Publication number
CN113804989A
CN113804989A CN202111362876.7A CN202111362876A CN113804989A CN 113804989 A CN113804989 A CN 113804989A CN 202111362876 A CN202111362876 A CN 202111362876A CN 113804989 A CN113804989 A CN 113804989A
Authority
CN
China
Prior art keywords
transformation ratio
group
tester
test
ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111362876.7A
Other languages
Chinese (zh)
Inventor
孙军
徐灿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Pandian Sci Tech Co ltd
Original Assignee
Wuhan Pandian Sci Tech Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Pandian Sci Tech Co ltd filed Critical Wuhan Pandian Sci Tech Co ltd
Priority to CN202111362876.7A priority Critical patent/CN113804989A/en
Publication of CN113804989A publication Critical patent/CN113804989A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention discloses a calibration method, a device, equipment and a storage medium for a transformation ratio group tester, wherein the method carries out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of a transformation ratio calibration device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out Z shape group test, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted transformation ratio measuring efficiency.

Description

Method, device, equipment and storage medium for calibrating variable ratio group tester
Technical Field
The invention relates to the technical field of power equipment detection, in particular to a method, a device, equipment and a storage medium for calibrating a transformation ratio group tester.
Background
The transformer is one of the most important devices in the power system, the transformation ratio test is to apply voltage on one side of the transformer, measure the voltage on the other side by using an instrument or a transformation ratio tester, and then calculate the voltage ratio according to the measurement result; the purpose of the transformation ratio test is to check whether the number of turns of the winding is correct, check the condition of a tap switch, check whether the winding has an inter-turn metallic short circuit and the like, and provide a basis for whether the transformer can be put into operation or parallel operation.
At present, the instrument for measuring the transformer transformation ratio is a transformation ratio tester, when the transformation ratio test is carried out, the transformation ratio tester sends out a high voltage to the high-voltage winding end of the transformer, the low voltage induced by the low-voltage winding end of the transformer is sent to the measuring end of the transformation ratio tester according to the turn ratio relation of the high winding and the low winding of the transformer, meanwhile, the singlechip in the transformation ratio tester is used for carrying out division operation according to the sampled high voltage and low voltage so as to obtain the actual transformation ratio of the transformer, the transformation ratio tester is a measuring instrument, the transformation ratio measuring error is determined by corresponding calibrating device, the existing mutual inductance calibrating device can only calibrate a certain number of values on the transformation ratio bridge ratio plate, the calibration can not be carried out disk by disk and point by point, and the standard resistor of the resistor calibration device is greatly influenced by environmental conditions, so that the defects of large isolation error, low transformation ratio measurement accuracy and low measurement efficiency exist.
Disclosure of Invention
The invention mainly aims to provide a calibration method, a calibration device, equipment and a storage medium for a transformation ratio group tester, and aims to solve the technical problems of isolation error, low transformation ratio measurement accuracy and low measurement efficiency in a transformation ratio calibration mode in the prior art.
In a first aspect, the present invention provides a calibration method for a transformation ratio group tester, comprising the steps of:
carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of the transformation ratio calibrating device;
performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device;
and carrying out Z-shaped group test on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
Optionally, the performing, resolution testing and pass-through testing on the transformation ratio group tester through the inductive voltage divider of the transformation ratio calibrating apparatus includes:
the current transformation ratio of the transformation ratio group tester is obtained through the verification of an inductive voltage divider of the transformation ratio verification device, and the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a transformation ratio error value;
calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value;
calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider;
and determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
Optionally, the calibrating, by the inductive voltage divider of the ratio calibrating apparatus, to obtain a current ratio of the ratio group tester, and comparing the current ratio with a preset ratio threshold to obtain a ratio error value, includes:
respectively connecting a first primary input voltage end and a second primary input voltage end of an inductive voltage divider of a transformation ratio calibrating device with a secondary input voltage end and a backboard voltage end of a transformation ratio group tester, and adjusting the setting number of the inductive voltage divider to obtain the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers;
and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
Optionally, the calibrating the resolution of the display value of the variable ratio group tester by adjusting the setting number of the inductive voltage divider to obtain a resolution change value includes:
and verifying and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number to obtain a resolution change value.
Optionally, the calibrating and obtaining self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the inductive voltage divider includes:
and adjusting the setting number of the induction voltage divider to be 1.000000, inputting the primary side voltage of the transformation ratio tester to a secondary input voltage end, and verifying to obtain self-correcting direct data of the transformation ratio group tester.
Optionally, the group test of the transformation ratio group tester by the standard three-phase voltage transformer of the transformation ratio calibrating apparatus includes:
forming 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star, a secondary star, a primary triangle or a secondary triangle connection method, and testing all the groups of the transformation ratio group tester to obtain a current test group;
and matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
Optionally, the performing, by the selection switch of the ratio calibrating apparatus, the Z-shaped group test on the ratio group tester includes:
and adjusting a selection switch of the transformation ratio calibrating device to a Z-shaped group gear, determining the number of corresponding inductive voltage dividers according to a preset group switch selection table, and performing Z-shaped group test on the transformation ratio group tester according to the number of the inductive voltage dividers to obtain a Z-shaped group test result of the transformation ratio group tester.
In a second aspect, to achieve the above object, the present invention further provides a calibration apparatus for a variable ratio group tester, including:
the induction voltage division testing module is used for carrying out transformation ratio testing, resolution testing and direct connection testing on the transformation ratio group tester through an induction voltage divider of the transformation ratio calibrating device;
the three-phase voltage testing module is used for testing the groups of the transformation ratio group tester through a standard three-phase voltage transformer of the transformation ratio calibrating device;
and the Z-shaped group testing module is used for carrying out Z-shaped group testing on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
In order to achieve the above object, the present invention further provides a calibration apparatus for a variable ratio group tester, including: a memory, a processor, and a variable ratio group tester certification program stored on the memory and executable on the processor, the variable ratio group tester certification program configured to implement the steps of the variable ratio group tester certification method as described above.
In a fourth aspect, to achieve the above object, the present invention further provides a storage medium, on which a calibration program of the variable ratio group tester is stored, and the calibration program of the variable ratio group tester, when executed by a processor, implements the steps of the calibration method of the variable ratio group tester as described above.
The invention provides a calibration method of a transformation ratio group tester, which is characterized in that a transformation ratio test, a resolution test and a direct connection test are carried out on the transformation ratio group tester through an inductive voltage divider of a transformation ratio calibration device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out Z shape group test, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted transformation ratio measuring efficiency.
Drawings
FIG. 1 is a schematic diagram of an apparatus architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a method for calibrating a variational ratio group tester of the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of a method for calibrating a variational ratio group tester according to the present invention;
FIG. 4 is a schematic flow chart diagram of a third embodiment of a method for calibrating a variational-ratio group tester of the present invention;
FIG. 5 is a schematic flow chart diagram of a fourth embodiment of a method for calibrating a variational ratio group tester of the present invention;
FIG. 6 is a schematic flow chart of a fifth embodiment of a method for certification of a variational ratio group tester of the present invention;
FIG. 7 is a schematic flow chart diagram of a sixth embodiment of a method for calibrating a variational group tester of the present invention;
FIG. 8 is a schematic flow chart diagram of a seventh embodiment of a method for calibrating a variational ratio group tester of the present invention;
fig. 9 is a functional block diagram of a first embodiment of a transformation ratio group tester calibrating apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of the transformation ratio calibrating device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out the test of Z shape group, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted the efficiency of transformation ratio measurement, has solved among the prior art transformation ratio examination mode and has had isolation error, the lower technical problem of transformation ratio measurement accuracy and measurement efficiency.
Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The Memory 1005 may be a high-speed RAM Memory or a Non-Volatile Memory (Non-Volatile Memory), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 1 is not intended to be limiting of the apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a storage 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a certification program of the variable ratio group tester.
The apparatus of the present invention calls, through the processor 1001, a calibration program for a transformation ratio group tester stored in the memory 1005, and executes the following operations:
carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of the transformation ratio calibrating device;
performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device;
and carrying out Z-shaped group test on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
the current transformation ratio of the transformation ratio group tester is obtained through the verification of an inductive voltage divider of the transformation ratio verification device, and the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a transformation ratio error value;
calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value;
calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider;
and determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
respectively connecting a first primary input voltage end and a second primary input voltage end of an inductive voltage divider of a transformation ratio calibrating device with a secondary input voltage end and a backboard voltage end of a transformation ratio group tester, and adjusting the setting number of the inductive voltage divider to obtain the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers;
and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
and verifying and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number to obtain a resolution change value.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
and adjusting the setting number of the induction voltage divider to be 1.000000, inputting the primary side voltage of the transformation ratio tester to a secondary input voltage end, and verifying to obtain self-correcting direct data of the transformation ratio group tester.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
forming 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star, a secondary star, a primary triangle or a secondary triangle connection method, and testing all the groups of the transformation ratio group tester to obtain a current test group;
and matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
The apparatus of the present invention calls, via the processor 1001, the transformation ratio group tester calibration program stored in the memory 1005, and also performs the following operations:
and adjusting a selection switch of the transformation ratio calibrating device to a Z-shaped group gear, determining the number of corresponding inductive voltage dividers according to a preset group switch selection table, and performing Z-shaped group test on the transformation ratio group tester according to the number of the inductive voltage dividers to obtain a Z-shaped group test result of the transformation ratio group tester.
According to the scheme, the transformation ratio test, the resolution test and the direct connection test are carried out on the transformation ratio group tester through the induction voltage divider of the transformation ratio calibrating device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out Z shape group test, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted transformation ratio measuring efficiency.
Based on the hardware structure, the embodiment of the method for calibrating the variable ratio group tester is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the calibration method for the transformation ratio group tester of the present invention.
In a first embodiment, the method of calibrating a variational group tester comprises the steps of:
and step S10, carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through the induction voltage divider of the transformation ratio calibrating device.
It should be noted that the inductive voltage divider of the transformation ratio calibrating apparatus can perform transformation ratio test, resolution test and pass-through test on the transformer transformation ratio tester, and can perform test on various types of transformer transformation ratio testers, for example, the inductive voltage divider can be used to calibrate the transformation ratio precision and resolution of the transformer transformation ratio tester of 0.05 level or below, and the present embodiment does not limit this.
And step S20, performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of the transformation ratio calibrating device.
It will be appreciated that a standard three-phase voltage transformer passing through the ratio verification apparatus may be used to verify the group test function of the ratio group tester.
And step S30, carrying out Z-shaped group test on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
It should be understood that the Z-type group test can be performed on the transformation ratio group tester through a standard three-phase voltage transformer regulating selection switch of the transformation ratio calibrating device, and generally, three voltage ratio selections are available.
According to the scheme, the transformation ratio test, the resolution test and the direct connection test are carried out on the transformation ratio group tester through the induction voltage divider of the transformation ratio calibrating device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out Z shape group test, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted transformation ratio measuring efficiency.
Further, fig. 3 is a schematic flow chart of a second embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 3, the second embodiment of the calibration method for a transformation ratio group tester of the present invention is proposed based on the first embodiment, and in this embodiment, the step S10 specifically includes the following steps:
and step S11, obtaining the current transformation ratio of the transformation ratio group tester through the verification of the inductive voltage divider of the transformation ratio verification device, and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a transformation ratio error value.
It should be noted that the transformation ratio of the transformation ratio group tester can be identified through the inductive voltage divider of the transformation ratio calibrating device, and the transformation ratio error value can be obtained by comparing the current transformation ratio with the preset transformation ratio threshold value.
In a specific implementation, the preset transformation ratio threshold may be an inverse number of any value between 1.111111 and 0.0000001, for example, when the transformation ratio value to be verified is 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 2500, the dial of the inductive voltage divider should be selected to be 1.000000, 0.5000000, 0.2000000, 0.1000000, 0.0500000, 0.0200000, 0.0100000, 0.0050000, 0.0020000, 0.0010000, 0.00050000, 0.00040000.
And step S12, calibrating and obtaining the resolution of the display value of the transformation ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value.
It can be understood that by adjusting the setting number of the inductive voltage divider, the resolution of various transformation ratio testers can be tested, so as to obtain the resolution change value of the display value of the corresponding transformation ratio group tester.
In a specific implementation, when the resolution of the ratio transformer is verified, the display value of the ratio transformer should change significantly with the increase or decrease of the resolution, and generally, the number of the inductive voltage dividers may be adjusted to be between 0.1000000 and 0.0999900 (i.e., the ratio of the transformation is between 10.000 and 11.100), or of course, other values may be used, which is not limited in this embodiment.
And step S13, calibrating to obtain self-calibration through data of the transformation ratio group tester by adjusting the setting number of the induction voltage divider.
It should be understood that the pass-through function of the ratio tester can be tested by adjusting the setting number of the inductive voltage divider, so as to obtain the self-correcting pass-through data of the ratio group tester.
Step S14, determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
It can be understood that, whether the transformation ratio test of the transformation ratio group tester passes or not can be judged through the size of the transformation ratio error value, an error threshold value is generally set to be compared with the transformation ratio error value, if the error threshold value is larger than the transformation ratio error value, the transformation ratio test fails, and if the error threshold value is not larger than the transformation ratio error value, the transformation ratio test passes; whether the resolution test of the transformation ratio group tester passes or not can be judged according to the size of the resolution change value, a change value threshold value can be generally set, the resolution test fails when the resolution change value is larger than the change value threshold value, and the resolution test passes when the resolution change value is not larger than the change value threshold value; through analysis of the self-correcting pass data, a pass test result can be determined, and therefore whether the pass test of the variable ratio group tester passes or not is determined.
According to the scheme, the current transformation ratio of the transformation ratio group tester is obtained through verification of the inductive voltage divider of the transformation ratio verification device, and the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a transformation ratio error value; calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value; calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider; determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data; the comprehensive test can be carried out on the transformation ratio group tester, the isolation error is eliminated, and the accuracy of transformation ratio measurement is improved.
Further, fig. 4 is a schematic flow chart of a third embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 4, the third embodiment of the calibration method for a transformation ratio group tester of the present invention is provided based on the second embodiment, and in this embodiment, the step S11 specifically includes the following steps:
and S111, respectively connecting a primary input voltage first end and a primary input voltage second end of an inductive voltage divider of the transformation ratio calibrating device with a secondary input voltage end and a back plate voltage end of the transformation ratio group tester, and adjusting the setting number of the inductive voltage divider to obtain the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers.
It should be noted that, a first primary input voltage end and a second primary input voltage end of an inductive voltage divider of the transformation ratio calibrating apparatus are respectively connected to a secondary input voltage end and a backplane voltage end of the transformation ratio group tester, and the first primary input voltage end is generally in short circuit with the secondary input voltage end and the backplane voltage end, so as to perform different numbers setting on the inductive voltage divider to obtain different transformation ratio values.
Step S112, comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
It can be understood that the transformation ratio group testers may be tested one by one, and the error of each transformation ratio may be calculated one by one according to the result displayed by the tested transformation ratio tester, so as to determine the accuracy of the transformation ratio tester, where the transformation ratio error value may be a result of dividing the difference between the current transformation ratio and the preset transformation ratio threshold by the preset transformation ratio threshold, where the preset transformation ratio threshold is a standard transformation ratio value preset by the transformation ratio verification apparatus, and may generally be the reciprocal of the number of induced voltage division devices, and this embodiment is not limited thereto.
According to the scheme, the first primary input voltage end and the second primary input voltage end of the induction voltage divider of the transformation ratio calibrating device are respectively connected with the secondary input voltage end and the back plate voltage end of the transformation ratio group tester, the setting number of the induction voltage divider is adjusted, and the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers is obtained; the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and the reciprocal of the relative difference value is used as a transformation ratio error value, so that the transformation ratio test can be performed on the transformation ratio group tester in detail and accurately, the accuracy of transformation ratio measurement is improved, full-automatic verification is realized, the operation is convenient and fast, and the efficiency and the speed of transformation ratio measurement are improved.
Further, fig. 5 is a schematic flow chart of a fourth embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 5, the fourth embodiment of the calibration method for a transformation ratio group tester of the present invention is provided based on the second embodiment, and in this embodiment, the step S12 specifically includes the following steps:
and S121, calibrating the resolution of the display value of the variable ratio group tester to obtain a resolution change value by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number.
It should be noted that, when performing the resolution test, different setting numbers can be performed on the inductive voltage divider, and then the step-by-step setting number is changed, the display value of the transformation ratio tester will obviously change, for example: the number of the inductive voltage dividers is 0.1000000, and then the inductive voltage dividers are changed between 0.1000000-0.0999900, so that the display value resolution of the transformation ratio tester is determined by the obvious change of the transformation ratio tester.
According to the scheme, the resolution of the display value of the variable ratio group tester is obtained through verification by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number, so that the resolution change value is obtained, the change condition of the resolution can be accurately obtained, and the accuracy and the efficiency of the resolution test are improved.
Further, fig. 6 is a schematic flow chart of a fifth embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 6, a fifth embodiment of the calibration method for a transformation ratio group tester of the present invention is provided based on the second embodiment, in this embodiment, the step S13 specifically includes the following steps:
step S131, adjusting the setting number of the induction voltage divider to be 1.000000, inputting the primary side voltage of the transformation ratio tester to a secondary input voltage end, and verifying to obtain self-correcting through data of the transformation ratio group tester.
It should be noted that when the setting number of the inductive voltage divider is 1.000000, that is, the direct connection is performed, the primary side voltage of the transformation ratio tester is input to the secondary input voltage end, so that the self-calibration direct connection data of the transformation ratio group tester is obtained through verification.
In a specific implementation, the primary voltage U of the transformation ratio tester can be adjustedABDirectly connected to secondary terminals (a, b terminals), i.e. UAB=UabThe method can carry out 1/1 self-calibration on the transformation ratio tester, generally cannot carry out verification on the transformation ratio tester which does not allow through, and can carry out 1/1 isolation test on the transformation ratio tester which does not allow through by using an inductive separation winding; the voltage of the primary side of the transformation ratio tester is directly input to the secondary side, and the value displayed by the transformation ratio is 1.0000. If the difference is not the same, the error of the tested transformation ratio tester at the moment is obtained.
According to the scheme, the number of the induction voltage dividers is adjusted to be 1.000000, the primary side voltage of the transformation ratio tester is input to the secondary input voltage end, the self-calibration through data of the transformation ratio group tester is obtained through calibration, through test of the transformation ratio group tester can be completed, comprehensive test of the transformation ratio group tester can be performed, and accuracy of the transformation ratio test is improved.
Further, fig. 7 is a schematic flow chart of a sixth embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 7, the sixth embodiment of the calibration method for a transformation ratio group tester of the present invention is proposed based on the first embodiment, and in this embodiment, the step S20 specifically includes the following steps:
step S21, forming 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star, a secondary star, a primary triangle or a secondary triangle connection method, and testing all the groups of the transformation ratio group tester to obtain the current test group.
It should be noted that 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device are formed by a primary star, a secondary star, a primary triangle or a secondary triangle connection method, all groups of the transformation ratio group tester can be tested, and the transformation ratio value tested in a group can be selected from three types, namely 10, 100 and 1000.
And step S22, matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
It should be understood that the current test group is matched with the group in the preset group switch selection table, if the matching is successful, the group test is passed, and if the matching is failed, the group test is not passed.
In the concrete implementation, a standard three-phase voltage transformer is used for carrying out group testing, terminals of a transformation ratio tester are respectively connected to terminals of a transformation ratio calibrating device, a group transformation ratio switch is arranged at 10, so that the position of the selection switch is selected according to a group switch selection table on a cover plate, the tested transformation ratio group tester works in a state of a tested group, the displayed group of the tested transformation ratio group tester is consistent with all groups displayed in the group switch selection table, whether a tested product is qualified or not in the group testing is determined, and the number of the group transformation ratio switches can be changed to be 100 and 1000 for carrying out the group testing.
According to the scheme, 12 groups are formed by connecting the standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star shape, a secondary star shape, a primary triangle or a secondary triangle, and all the group tests are carried out on the transformation ratio group tester to obtain the current test group; and matching the current test group with a group in a preset group switch selection table, judging whether the group test of the transformation ratio group tester passes according to a matching result, and comprehensively and delicately performing the group test.
Further, fig. 8 is a schematic flow chart of a seventh embodiment of the calibration method for a transformation ratio group tester of the present invention, and as shown in fig. 8, the seventh embodiment of the calibration method for a transformation ratio group tester of the present invention is proposed based on the first embodiment, and in this embodiment, the step S30 specifically includes the following steps:
and S31, adjusting a selection switch of the transformation ratio calibrating device to a Z-shaped group gear, determining the number of corresponding inductive voltage dividers according to a preset group switch selection table, and performing Z-shaped group test on the transformation ratio group tester according to the number of the inductive voltage dividers to obtain a Z-shaped group test result of the transformation ratio group tester.
It should be noted that, by adjusting the selection switch of the transformation ratio calibrating apparatus to the "Z-shaped group" gear, the number of the corresponding inductive voltage dividers can be determined, and then the Z-shaped group test can be performed to generate the corresponding Z-shaped group test result of the transformation ratio group tester.
In a specific implementation, the switch can be selected as a "Z-group" gear, and the switch is selected correspondingly according to the content of the number of inductive voltage dividers of the group switch selection table, so that whether the Z-group three-phase transformer can be tested by the transformation ratio group tester or not can be determined, the functional switch still needs to work in the state of the test group, the general displayed standard transformation ratio value is 100, and the transformation ratio group switch does not work at this time.
According to the scheme, the selection switch of the transformation ratio calibrating device is adjusted to the 'Z-shaped group' gear, the corresponding inductive voltage divider setting number is determined according to the preset group switch selection table, the transformation ratio group tester is subjected to Z-shaped group test to obtain the Z-shaped group test result of the transformation ratio group tester, the Z-shaped group test can be comprehensively and finely performed, the test result accuracy is high, the test process speed is high, and the operation is convenient and fast.
Correspondingly, the invention further provides a calibrating device for the transformation ratio group tester.
Referring to fig. 9, fig. 9 is a functional block diagram of a first embodiment of a transformation ratio group tester calibrating apparatus according to the present invention.
In a first embodiment of the calibrating apparatus for a transformation ratio group tester of the present invention, the calibrating apparatus for a transformation ratio group tester includes:
and the induction voltage division testing module 10 is used for carrying out transformation ratio testing, resolution testing and direct connection testing on the transformation ratio group tester through an induction voltage divider of the transformation ratio calibrating device.
And the three-phase voltage testing module 20 is used for testing the groups of the transformation ratio group tester through a standard three-phase voltage transformer of the transformation ratio calibrating device.
And the Z-shaped group testing module 30 is used for carrying out Z-shaped group testing on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
The inductive partial pressure test module 10 is further configured to obtain a current transformation ratio of the transformation ratio group tester through verification of an inductive voltage divider of the transformation ratio verification device, and compare the current transformation ratio with a preset transformation ratio threshold value to obtain a transformation ratio error value; calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value; calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider; and determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
The induced voltage division testing module 10 is further configured to connect a first primary input voltage end and a second primary input voltage end of an induced voltage divider of the transformation ratio calibrating apparatus to a secondary input voltage end and a back panel voltage end of the transformation ratio group tester, respectively, and adjust the setting number of the induced voltage divider to obtain current transformation ratios of the transformation ratio group tester corresponding to different setting numbers; and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
The sensing voltage division testing module 10 is further configured to verify the resolution of the display value of the variable ratio group tester obtained by adjusting the setting number of the sensing voltage divider to 0.1000000-0.0999900 and changing the number of the gear-by-gear, so as to obtain a resolution change value.
The inductive voltage division testing module 10 is further configured to adjust the setting number of the inductive voltage divider to 1.000000, input a primary-side voltage of the transformation ratio tester to a secondary input voltage end, and verify to obtain self-calibration through data of the transformation ratio group tester.
The three-phase voltage testing module 20 is further configured to connect the standard three-phase voltage transformers of the transformation ratio calibrating apparatus into 12 groups according to a primary star, a secondary star, a primary triangle, or a secondary triangle, and perform all group tests on the transformation ratio group tester to obtain a current test group; and matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
The Z-shaped group testing module 30 is further configured to adjust a selector switch of the transformation ratio calibrating apparatus to a "Z-shaped group" level, determine a corresponding number of inductive voltage dividers according to a preset group switch selection table, perform Z-shaped group testing on the transformation ratio group tester according to the number of inductive voltage dividers, and obtain a Z-shaped group testing result of the transformation ratio group tester.
The steps implemented by each functional module of the calibration device for the variable ratio group tester can refer to each embodiment of the calibration method for the variable ratio group tester, and are not described herein again.
In addition, an embodiment of the present invention further provides a storage medium, where a calibration program of the transformation ratio group tester is stored on the storage medium, and when executed by a processor, the calibration program of the transformation ratio group tester implements the following operations:
carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of the transformation ratio calibrating device;
performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device;
and carrying out Z-shaped group test on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
the current transformation ratio of the transformation ratio group tester is obtained through the verification of an inductive voltage divider of the transformation ratio verification device, and the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a transformation ratio error value;
calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value;
calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider;
and determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
respectively connecting a first primary input voltage end and a second primary input voltage end of an inductive voltage divider of a transformation ratio calibrating device with a secondary input voltage end and a backboard voltage end of a transformation ratio group tester, and adjusting the setting number of the inductive voltage divider to obtain the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers;
and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
and verifying and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number to obtain a resolution change value.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
and adjusting the setting number of the induction voltage divider to be 1.000000, inputting the primary side voltage of the transformation ratio tester to a secondary input voltage end, and verifying to obtain self-correcting direct data of the transformation ratio group tester.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
forming 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star, a secondary star, a primary triangle or a secondary triangle connection method, and testing all the groups of the transformation ratio group tester to obtain a current test group;
and matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
Further, the calibration program of the transformation ratio group tester is executed by the processor to realize the following operations:
and adjusting a selection switch of the transformation ratio calibrating device to a Z-shaped group gear, determining the number of corresponding inductive voltage dividers according to a preset group switch selection table, and performing Z-shaped group test on the transformation ratio group tester according to the number of the inductive voltage dividers to obtain a Z-shaped group test result of the transformation ratio group tester.
According to the scheme, the transformation ratio test, the resolution test and the direct connection test are carried out on the transformation ratio group tester through the induction voltage divider of the transformation ratio calibrating device; performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device; the selector switch through the transformation ratio calibrating device is right the transformation ratio group tester carries out Z shape group test, can carry out comprehensive test to the transformation ratio group tester, has eliminated isolation error, has improved the accuracy of transformation ratio measurement, has realized full-automatic examination, and convenient operation is swift, has promoted transformation ratio measuring efficiency.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A calibration method for a variable ratio group tester is characterized by comprising the following steps:
carrying out transformation ratio test, resolution test and direct connection test on the transformation ratio group tester through an inductive voltage divider of the transformation ratio calibrating device;
performing group test on the transformation ratio group tester through a standard three-phase voltage transformer of a transformation ratio calibrating device;
and carrying out Z-shaped group test on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
2. The method of calibrating a ratiometric group tester of claim 1, wherein performing the ratio test, the resolution test, and the pass-through test on the ratiometric group tester through the inductive voltage divider of the ratiometric calibrating device comprises:
the current transformation ratio of the transformation ratio group tester is obtained through the verification of an inductive voltage divider of the transformation ratio verification device, and the current transformation ratio is compared with a preset transformation ratio threshold value to obtain a transformation ratio error value;
calibrating and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider, and obtaining a resolution change value;
calibrating to obtain self-calibration direct-current data of the variable ratio group tester by adjusting the setting number of the induction voltage divider;
and determining whether the transformation ratio test of the transformation ratio group tester passes or not according to the transformation ratio error value, determining whether the resolution ratio test of the transformation ratio group tester passes or not according to the resolution ratio change value, and determining whether the through test of the transformation ratio group tester passes or not according to the self-correcting through data.
3. The method for calibrating a variable ratio group tester as claimed in claim 2, wherein the calibrating of the inductive voltage divider of the variable ratio calibrating device to obtain the current variable ratio of the variable ratio group tester and comparing the current variable ratio with a preset variable ratio threshold to obtain a variable ratio error value comprises:
respectively connecting a first primary input voltage end and a second primary input voltage end of an inductive voltage divider of a transformation ratio calibrating device with a secondary input voltage end and a backboard voltage end of a transformation ratio group tester, and adjusting the setting number of the inductive voltage divider to obtain the current transformation ratio of the transformation ratio group tester corresponding to different setting numbers;
and comparing the current transformation ratio with a preset transformation ratio threshold value to obtain a relative difference value of the current transformation ratio and the preset transformation ratio threshold value, and taking the reciprocal of the relative difference value as a transformation ratio error value.
4. The calibration method of the variable ratio group tester as claimed in claim 2, wherein calibrating the resolution of the display value of the variable ratio group tester by adjusting the setting number of the inductive voltage divider to obtain the resolution variation value comprises:
and verifying and obtaining the resolution of the display value of the variable ratio group tester by adjusting the setting number of the induction voltage divider to be 0.1000000-0.0999900 and changing the step-by-step setting number to obtain a resolution change value.
5. The method for calibrating a variable ratio group tester as claimed in claim 2, wherein the calibrating and obtaining the self-calibration pass-through data of the variable ratio group tester by adjusting the setting number of the inductive voltage divider comprises:
and adjusting the setting number of the induction voltage divider to be 1.000000, inputting the primary side voltage of the transformation ratio tester to a secondary input voltage end, and verifying to obtain self-correcting direct data of the transformation ratio group tester.
6. The method for calibrating a transformation ratio group tester as claimed in claim 1, wherein said group testing of said transformation ratio group tester by a standard three-phase voltage transformer of a transformation ratio calibration apparatus comprises:
forming 12 groups of standard three-phase voltage transformers of the transformation ratio calibrating device according to a primary star, a secondary star, a primary triangle or a secondary triangle connection method, and testing all the groups of the transformation ratio group tester to obtain a current test group;
and matching the current test group with a group in a preset group switch selection table, and judging whether the group test of the transformation ratio group tester passes according to a matching result.
7. The method of calibrating a ratio group tester as recited in claim 1, wherein said Z-grouping test of said ratio group tester by a selector switch of a ratio calibrating device comprises:
and adjusting a selection switch of the transformation ratio calibrating device to a Z-shaped group gear, determining the number of corresponding inductive voltage dividers according to a preset group switch selection table, and performing Z-shaped group test on the transformation ratio group tester according to the number of the inductive voltage dividers to obtain a Z-shaped group test result of the transformation ratio group tester.
8. The utility model provides a transformer ratio group tester calibrating installation which characterized in that, transformer ratio group tester calibrating installation includes:
the induction voltage division testing module is used for carrying out transformation ratio testing, resolution testing and direct connection testing on the transformation ratio group tester through an induction voltage divider of the transformation ratio calibrating device;
the three-phase voltage testing module is used for testing the groups of the transformation ratio group tester through a standard three-phase voltage transformer of the transformation ratio calibrating device;
and the Z-shaped group testing module is used for carrying out Z-shaped group testing on the transformation ratio group tester through a selection switch of the transformation ratio calibrating device.
9. The utility model provides a transformation ratio group tester calibration equipment which characterized in that, transformation ratio group tester calibration equipment includes: a memory, a processor, and a transformation ratio group tester certification program stored on the memory and executable on the processor, the transformation ratio group tester certification program configured to implement the steps of the transformation ratio group tester certification method according to any one of claims 1 to 7.
10. A storage medium having stored thereon a transformation ratio group tester certification program which, when executed by a processor, performs the steps of the transformation ratio group tester certification method according to any one of claims 1 to 7.
CN202111362876.7A 2021-11-17 2021-11-17 Method, device, equipment and storage medium for calibrating variable ratio group tester Pending CN113804989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111362876.7A CN113804989A (en) 2021-11-17 2021-11-17 Method, device, equipment and storage medium for calibrating variable ratio group tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111362876.7A CN113804989A (en) 2021-11-17 2021-11-17 Method, device, equipment and storage medium for calibrating variable ratio group tester

Publications (1)

Publication Number Publication Date
CN113804989A true CN113804989A (en) 2021-12-17

Family

ID=78898637

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111362876.7A Pending CN113804989A (en) 2021-11-17 2021-11-17 Method, device, equipment and storage medium for calibrating variable ratio group tester

Country Status (1)

Country Link
CN (1) CN113804989A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101709995A (en) * 2009-12-24 2010-05-19 浙江大学 Methods for vibration online monitoring and fault diagnosis of power transformer
CN102539960A (en) * 2011-12-19 2012-07-04 上海市电力公司 Method for measuring variable ratio nonlinear primary current threshold value of current transformer
CN105548642A (en) * 2016-02-19 2016-05-04 浙江华仪电器科技有限公司 Collection circuit, electric energy quality monitoring device and ring main unit
JP2018033209A (en) * 2016-08-23 2018-03-01 ミクロン精密株式会社 Vibration signal generation method and resonant frequency search method
CN209086422U (en) * 2018-10-09 2019-07-09 国网新疆电力有限公司电力科学研究院 No-load voltage ratio group tester verification device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101709995A (en) * 2009-12-24 2010-05-19 浙江大学 Methods for vibration online monitoring and fault diagnosis of power transformer
CN102539960A (en) * 2011-12-19 2012-07-04 上海市电力公司 Method for measuring variable ratio nonlinear primary current threshold value of current transformer
CN105548642A (en) * 2016-02-19 2016-05-04 浙江华仪电器科技有限公司 Collection circuit, electric energy quality monitoring device and ring main unit
JP2018033209A (en) * 2016-08-23 2018-03-01 ミクロン精密株式会社 Vibration signal generation method and resonant frequency search method
CN209086422U (en) * 2018-10-09 2019-07-09 国网新疆电力有限公司电力科学研究院 No-load voltage ratio group tester verification device

Similar Documents

Publication Publication Date Title
US20140343883A1 (en) User Interface for Signal Integrity Network Analyzer
US20110286506A1 (en) User Interface for Signal Integrity Network Analyzer
US20110238383A1 (en) One-Port De-embedding Using Time Domain Substitution
CN101482603A (en) Automatic calibration system of frequency spectrum analyzer
CN106291432A (en) The method of inspection of CT saturation degree and system
CN116449277A (en) Detection and calibration system for ATE test equipment and control method thereof
CN101153899A (en) Automatic measuring system and method of digital multimeter
CN113093087A (en) Method, device and equipment for checking instrument integrity of mutual inductor and storage medium
JP2007003407A (en) Method and apparatus for measuring impedance
CN113804989A (en) Method, device, equipment and storage medium for calibrating variable ratio group tester
CN113341202B (en) Method and system for detecting capacitance current measurement precision of arc suppression coil
Isaiev et al. Metrological characterisation of current transformers calibration unit for accurate measurement
CN107589396A (en) A kind of dynamic property source tracing method based on conventional power calibration device
CN109387802A (en) A kind of rated current error testing method of high-tension current inductor
CN110907879B (en) Calibration method of interturn voltage-withstanding tester
WO2012097558A1 (en) System and method for debugging operating current of terminal
RU2282208C1 (en) Device for testing measuring voltage transformers
CN113534033A (en) Calibration method and calibration system of test machine
Isaiev et al. Precise low-cost method for checking accuracy of current transformers calibration unit
Singh et al. Inter-laboratory comparison of S-parameter measurements with dynamic uncertainty evaluation
CN216560964U (en) Multichannel direct current sensor testing arrangement
CN112986888B (en) Method and device for calibrating transformer short-circuit impedance tester
GB2192464A (en) Wound component tester
Brehm et al. Modeling capacitive voltage transformers for distorted waveforms measurements
Shaolei et al. Research on Automatic Calibration Technology of Transformation Ratio Tester

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20211217