Mutual inductor transient state sampling precision verification method and device, terminal and medium
A technology of sampling accuracy and verification method, which is applied in the field of data processing and can solve problems such as large errors in the accuracy verification of transformers
Inactive Publication Date: 2020-07-03
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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[0004] This application provides a transformer transient sampling accuracy verification method, device, terminal and medium, which are used to solve the existing technical problem of large error in the accuracy verification of transformers
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[0044] At present, the acquisition units of fault recording equipment all use electromagnetic transformers, which transform the primary large current into secondary small current according to the transformation ratio through the magnetic coupling between the primary and secondary side coils and the iron core. Some transformers also have the problem of unstable sampling accuracy in the transient process. If the existing calibration method is based on the actual sampling value and the reference value for comparison and calibration, when the sampling value is too large It is easy to cause misoperation, and the hidden dangers of the transformer cannot be found if the sampling value is too small, which in turn leads to the technical problem of large error in the accuracy calibration of the existing transformer.
[0045] The embodiment of the present application provides a transformer transient sampling accuracy verification method, device, terminal and medium, which are used to solv...
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The invention discloses a mutual inductor transient state sampling precision verification method and device, a terminal and a medium. According to the invention, based on first fault recording data serving as reference data and second fault recording data serving as to-be-verified data, difference value calculation is performed on sampling point data in a fault transient state in the first fault recording data and the second fault recording data, Fourier transform is carried out on the difference value to obtain a difference effective value, and the comparison result of the difference effective value and a preset error threshold is used as a precision verification result of the to-be-verified mutual inductor, thereby solving a technical problem that a conventional mutual inductor is largein precision verification error because the sampling accuracy of the conventional mutual inductor is not stable in a transient process.
Description
technical field [0001] The present application relates to the field of data processing, in particular to a method, device, terminal and medium for verifying the transient sampling accuracy of a transformer. Background technique [0002] In recent years, with the maturity of power system intelligent technology, equipment with fault recording functions such as relay protection devices and fault recorders have been widely used in power systems. In the power system, the transformer, as an indispensable measurement unit in the fault recorder, occupies an extremely important position. The error of the transformer is different in different measurement ranges, which directly affects the performance of the relay protection device and the fault recorder. Acquisition accuracy. With the continuous development of the smart grid, the scale of the system is getting bigger and bigger, the voltage level is getting higher and higher, and the structure is becoming more and more complex, espec...
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IPC IPC(8): G01R35/02G01R35/00
CPCG01R35/005G01R35/02
Inventor 刘玮屠卿瑞吴梓亮焦邵麟王增超张智锐
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD