Hybrid optical fiber current transformer

Abstract

The invention belongs to the electronic equipment field and provides a hybrid optical fiber current transformer. The hybrid optical fiber current transformer includes a precision current sensing head, a high voltage conversion system, a high-voltage end power supply system, a signal transmission system, an analog signal conditioning system, a low voltage analog output system and a low-voltage end power supply system, wherein the precision current sensing head is connected with the high voltage conversion system, the high-voltage end power supply system supplies power for the high voltage conversion system, the high voltage conversion system is connected with the low voltage analog output system through the signal transmission system, the low voltage analog output system outputs signals through the analog signal conditioning system, the low voltage analog output system supplies power through the low-voltage end power supply system, the precision current sensing head is provided with two contact ends, and the analog signal conditioning system is connected with a special instrument display system. The hybrid optical fiber current transformer is integrated with modern electronic technologies and optical technologies. The hybrid fiber current transformer has the advantages of reliable work as well as simple circuits and light paths, and has significantly better performance such as dynamic response speed and bandwidth than those of a traditional electromagnetic type current transformer.

Description

technical field [0001] The invention relates to a current transformer, in particular to a hybrid optical fiber current transformer, which belongs to the field of electronic equipment. Background technique [0002] As an important equipment in the power system, the current transformer plays a very important role in the normal operation of the power system and the accurate measurement of power. With the development of the national economy, the new power supply voltage level continues to increase, and the measurement and protection accuracy requirements of the system continue to increase. It is an inevitable trend for new electronic current transformers to replace traditional electromagnetic current transformers. There are still great defects in reliability, wide response bandwidth and other characteristics. [0003] Passive structure is more popular in recent years, its advantages are simple structure, and completely eliminate the traditional electromagnetic induction compone...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the actual sensor, and their light source, optical fiber and signal processing technology have relatively high requirements.

The most important thing is that the birefringence effect and Verdet constant of the optical fiber used in the system will change with the change of environmental factors (such as temperature, pressure, vibration, etc.), which will affect the measurement accuracy

This brings great difficulties to the adjustment, calibration and shockproof of the entire optical path.

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