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Testing device and method for online self-calibration of mutual inductor

A technology for testing devices and transformers, applied in the directions of measuring devices, instruments, measuring electrical variables, etc., can solve the problem that transformers cannot be calibrated online, and achieve the effects of reducing labor input costs, eliminating hidden dangers, and reducing workload

Active Publication Date: 2022-07-29
WUHAN PANDIAN TECH +1
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Problems solved by technology

[0005] The embodiment of the present application provides a test device and method for online self-calibration of transformers to solve the technical problem that transformers cannot be calibrated online in the related art

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  • Testing device and method for online self-calibration of mutual inductor
  • Testing device and method for online self-calibration of mutual inductor

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Embodiment Construction

[0048] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0049] The flowcharts shown in the figures are for illustration only, and do not necessarily include all contents and operations / steps, nor do they have to be performed in the order described. For example, some operations / steps can also be decomposed, combined or partially combined, so the actual execution order may be changed acco...

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Abstract

The invention discloses a testing device and method for online self-calibration of a mutual inductor, and the testing device is used for calibrating a to-be-tested mutual inductor with N secondary windings, and comprises M pairs of winding joints, a line switching module, a direct sampling module, a difference measurement sampling module and a processing module. The winding joints are connected with the direct sampling module and the difference measurement sampling module through the circuit switching module, and the N pairs of winding joints are respectively connected with a secondary winding, so that the direct sampling module or the difference measurement sampling module obtains an electrical characteristic signal of each secondary winding; one end of the processing module is connected with the direct sampling module and the difference measurement sampling module, the other end of the processing module is connected with the line switching module, and the processing module is configured to control the line switching module to conduct each secondary winding connected with the direct sampling module or the difference measurement sampling module according to electrical characteristic signals of a plurality of different secondary windings; and an error between any two different secondary windings is calculated. According to the invention, real-time monitoring of the winding error of the transformer in operation can be realized.

Description

technical field [0001] The present application relates to the technical field of transformer calibration, in particular to a testing device and method for online self-calibration of transformers. Background technique [0002] In the intelligent monitoring of electric energy metering devices, it is often necessary to understand the operating errors of the transformer and the transformer merging unit, such as digital voltage transformers. [0003] In the current method of measuring the operating error, most of them are to compare the standard transformer and the tested transformer in the state of power failure, but in the actual verification, the transformers on some lines cannot be measured when the power is cut off. The transformer can be powered off, but the workload of offline measurement error is large and the detection period is long. [0004] Transformer power failure calibration is an important part of the periodic detection of electric energy metering devices, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 吴志武詹文周峰殷小东陈秀丽黄天富王春光聂琪孙军林彤尧阮聿津苏志生贾芳艳
Owner WUHAN PANDIAN TECH
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