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Error measurement equipment and method for current transformer

A current transformer and error measurement technology, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of difficult calibration of the ground terminal error of the current transformer

Pending Publication Date: 2021-09-28
CHINA ELECTRIC POWER RES INST +4
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Problems solved by technology

[0004] The present invention proposes an error measuring device and method for a current transformer to solve the problem of how to realize the difficult calibration of the ground terminal error of the current transformer

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  • Error measurement equipment and method for current transformer
  • Error measurement equipment and method for current transformer
  • Error measurement equipment and method for current transformer

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Embodiment Construction

[0025] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0026] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses error measurement equipment and method for a current transformer. The equipment comprises a detected current transformer, a first standard current transformer, a second standard current transformer and a difference measurement type error measurement device. The current source is controlled to output current to a preset number of percentage current points, the difference measurement type error measurement device is used to read the ratio difference value and the phase difference of the detected current transformer, and the error of the detected current transformer under the preset number of percentage current points is obtained; According to the invention, error measurement of 0.1%-1% of current points of the current transformer can be realized, the problem that low-end errors of a wide-range current transformer and a wide-range standard current transformer are difficult to calibrate is solved, and technical support can be provided for low-end metering performance value traceability of the wide-range current transformer.

Description

technical field [0001] The present invention relates to the technical field of error measurement, and more specifically, to an error measurement device and method for a current transformer. Background technique [0002] With the construction of the Energy Internet and the development of modern industries, a large number of distributed energy sources are connected to the grid, and the load of grid users is also showing a trend of diversification, and the range of current fluctuations is increasing. However, traditional current transformers are difficult to simultaneously meet the energy measurement requirements of extremely large loads and extremely small loads. It is urgent to further expand the measurement range of current transformers for metering to achieve higher accuracy current measurement capabilities within a larger range. The wide-range current transformer for metering is based on the new core material and error compensation technology, which expands the accurate me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 熊魁岳长喜李鹤李登云朱凯余佶成刘洋
Owner CHINA ELECTRIC POWER RES INST
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