Electronic mutual inductor frequency response test method and system
An electronic transformer, frequency response testing technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of electronic transformer frequency aliasing test, etc., to improve the measurement accuracy and ensure the test accuracy Effect
Active Publication Date: 2016-04-06
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0005] The embodiment of the present invention provides an electronic transformer frequency response testing method and system to solve the problem of realizing the research on the frequency response characteristics of electronic transformers in smart substations in the prior art, and failing to test the frequency of electronic transformers. Problems with aliasing for omni-directional testing
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[0034] The embodiment of the present invention provides a method and system for testing the frequency response of an electronic transformer. In order to enable those skilled in the art to better understand the technical solution in the present invention, the following will describe the present invention in conjunction with the accompanying drawings in the embodiment of the present invention The technical solutions in the embodiments are described clearly and completely, obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunct...
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The embodiment of the invention discloses an electronic mutual inductor frequency response test method and system. The method comprises: controlling test signals generating a plurality of different frequencies, and correspondingly converting the test signals generating a plurality of different frequencies into different frequency instantaneous values; performing digital analog conversion on the frequency instantaneous values, and forming corresponding first current signals; performing power amplification on the first current signals to obtain second current signals, and collecting the second current signals; collecting data signals to be measured of the second current signals after conversion by an electronic mutual inductor; and recording and comparing the frequency aliasing frequency spectrum mapping relation between the second current signals and the data signals to be measured, and determining the frequency response characteristics of the electronic mutual inductor according to the frequency spectrum mapping relation. The method disclosed in the invention employs a standard source back production mode, and meanwhile collects source signals and the data signals to be measured through the electronic mutual inductor to guarantee test precision.
Description
technical field [0001] The invention relates to the technical field of electronic transformers, in particular to a method and system for testing the frequency response of electronic transformers. Background technique [0002] At present, the power grid construction is mainly based on smart substations or digital substations. The main technical feature of smart substations or digital substations is the intelligence of primary equipment, so electronic transformers will definitely be the main smart primary equipment for future smart substation construction. At present, the sensors of electronic transformers mostly adopt Rogowski coil principle and Faraday magneto-optic principle. The biggest characteristics of electronic transformers with these two principles are good transmission characteristics and wide frequency band response range. However, the output of the electronic transformer is a digital signal with a sampling rate of 4k, so it is difficult to avoid frequency aliasing...
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IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 翟少磊何兆磊朱梦梦罗强沈鑫朱全聪于辉张建伟
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST