All-fiber current transformer and detection module and optical path state diagnosis method thereof

Abstract

The invention belongs to the technical field of all-fiber current transformers, and particularly relates to an all-fiber current transformer and a detection module and an optical path state diagnosis method thereof. The method comprises the following steps: obtaining a comb wave signal output by a detector of the all-fiber current transformer, and extracting at least one characteristic quantity of the comb wave signal: a comb wave peak amplitude, a comb wave peak full width at half maximum and a flat region sampling value, so as to judge an optical path polarization characteristic, a modulation frequency and an optical path transmission characteristic respectively; and diagnosing the optical path state of the all-fiber current transformer. According to the invention, the operation state of the primary optical path can be quickly diagnosed, the on-site construction quality and the long-term operation reliability of the all-fiber current transformer are improved, reliable data support is provided for product performance optimization and fault analysis, and the high-reliability requirement of a smart grid on current measurement equipment is met.

Description

technical field [0001] The invention belongs to the technical field of all-fiber-optic current transformers, and in particular relates to an all-fiber-optic current transformer, a detection module thereof, and an optical path state diagnosis method. Background technique [0002] The all-fiber-optic current transformer based on optical sensing technology is a passive electronic current transformer, which uses all-fiber optics to realize closed-loop detection of current signals. , light weight, easy to integrate with high-voltage equipment, and can measure DC signals. [0003] With the continuous increase in the number of all-fiber current transformers put into operation, the problem of operational stability has attracted more and more attention. The influencing factors of all-fiber current transformers in the actual operation process can be mainly divided into two types: external factors and internal factors. External factors mainly include environmental temperature changes,...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an all-fiber-optic current transformer, its detection module, and a method for diagnosing the state of the optical path, which are used to solve the problem that the all-fiber-optic current transformer in the prior art cannot effectively judge the state of its optical path

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