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Method for precise temperature compensation of optical fiber current transformer

A temperature compensation, fiber optic current technology, applied in voltage/current isolation, measuring current/voltage, instruments, etc., can solve problems such as unsatisfactory temperature compensation effect, inconsistent temperature field, etc., to improve temperature compensation effect, reduce temperature error, The effect of precise temperature compensation

Inactive Publication Date: 2020-04-10
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The invention provides a method for precise temperature compensation of an optical fiber current transformer, which can solve the technical problem that the temperature compensation effect is not ideal due to the inconsistency of the temperature field between the sensing ring and the acquisition unit in the optical fiber current transformer

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  • Method for precise temperature compensation of optical fiber current transformer
  • Method for precise temperature compensation of optical fiber current transformer
  • Method for precise temperature compensation of optical fiber current transformer

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit t...

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Abstract

The invention provides a method for precise temperature compensation of an optical fiber current transformer. The method comprises the following steps: obtaining the highest temperature and the lowesttemperature of an acquisition unit and a sensing ring; dividing the temperature from the lowest temperature to the highest temperature into n equal temperature sections at a preset temperature interval; acquiring the temperature of the acquisition unit and the temperature of the sensing ring at the same moment; acquiring a first ratio difference, a second ratio difference-an (m-1) th ratio difference and an mth ratio difference corresponding to the acquisition unit when the temperature in m adjacent temperature cycle periods is T1; acquiring a temperature compensation coefficient of the acquisition unit; obtaining a first ratio difference, a second ratio difference-an (m-1) th ratio difference and an mth ratio difference corresponding to the sensing ring when the temperature is T2 in m adjacent temperature cycle periods; obtaining a temperature compensation coefficient of the sensing ring; obtaining comprehensive temperature compensation coefficients. According to the technical scheme, the technical problem that in the prior art, the temperature compensation effect is not ideal due to the fact that temperature fields of a sensing ring and an acquisition unit in an optical fiber current transformer are inconsistent is solved.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a method for precise temperature compensation of an optical fiber current transformer. Background technique [0002] The fiber optic current transformer includes three parts: the acquisition unit, the polarization maintaining optical cable and the sensing ring. The acquisition unit is usually placed on the low-voltage side, and contains light sources, circuits and other photoelectric processing parts inside, which are mainly used to process optical signals and calculate the current value and transmit it to the back-end device; the sensing loop is usually placed on the high-voltage side, mainly including Sensing optical fiber and wave plate and other components are used to sense the magnetic field generated by the current and convert the magnetic field generated by the current into the state change of the optical signal; the polarization maintaining optical cable is used t...

Claims

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Application Information

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IPC IPC(8): G01R19/32G01R15/24
CPCG01R15/245G01R19/32
Inventor 向强李宗利杨怿冯喆李宏吴衍记
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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