Segmented current transformer correction method and device, electronic device and storage medium
A technology of a current transformer and a correction method, applied in the electrical field, can solve the problem of low measurement accuracy of the current transformer, and achieve the effect of being simple and easy to understand and improving the measurement accuracy.
Active Publication Date: 2021-07-23
杭州拓深科技有限公司
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[0004]
The embodiment of the present application provides a segmented current transformer calibration method, device, electronic device and storage medium to at least solve the problem of low measurement accuracy of current transformers in the related art
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[0037] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application. Based on the embodiments provided in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0038] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application, and those skilled in the art can also apply the present application to other similar scenarios. In addition, it can also be understood that although such development efforts may be complex and lengthy, for those of ordinary skill in the a...
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The invention relates to a segmented current transformer correction method. The segmented current transformer correction method comprises the steps of: dividing a measuring point into 50 equal parts according to the measuring range of a current transformer; measuring the current at the measuring point, calculating the theoretical power value of the measuring point, and recording the actual power value of the measuring point; calculating an error percentage of the theoretical power value and the actual power value according to the theoretical power value and the actual power value; obtaining a linearity curve of the current transformer according to the error percentage, and dividing the measuring range of the current transformer into three sections according to the linearity curve; selecting one calibration point for each of the three sections of measuring ranges for power calibration to obtain corresponding calibrated values; and when the magnitude of the current at the measuring point is in one of the three sections of measuring ranges, correcting the current of the measuring point by using the calibrated value of the section. According to the invention, the problem that the measurement precision of the current transformer is not high in the prior art is solved, and segmented correction of a current transformer is realized.
Description
technical field [0001] The present application relates to the electrical field, in particular to a calibration method, device, electronic device and storage medium for a segmented current transformer. Background technique [0002] A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. It consists of a closed iron core and a winding. In the production and operation, the currents in the lines of power generation, transformation, transmission, distribution and consumption are very different. In order to facilitate measurement, protection and control, it needs to be converted into a relatively uniform current. In addition, the voltage on the lines is generally very high, such as direct The measurement is very dangerous, so the current transformer plays the role of current transformation and electrical isolation. At present, most curre...
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IPC IPC(8): G01R35/02
CPCG01R35/02Y02E10/50
Inventor 梁昆王观亮黄栋张轩铭钱伟
Owner 杭州拓深科技有限公司