Novel reflection type reciprocity optical voltage mutual inductor and optical path design method thereof

Abstract

The invention discloses a novel reflection type reciprocity optical voltage mutual inductor based on the Pockels effect and an optical path design method of the reflection type reciprocity optical voltage mutual inductor, and belongs to the technical field of optical voltage mutual inductors. Optical path reciprocity between a polarized light generation module and an optical rotation module is formed through the optical rotation action of the optical rotation module on two orthogonal line polarized lights which pass the optical rotation module for twice in a positive-and-negative mode, and immunity for interference of popularization-maintaining delaying optical cable surrounding environment is strengthened. The two orthogonal line polarized lights are interchanged in mode through a half wave plate, optical path reciprocity of a sensing module is achieved, additional double-refraction error due to electro-optical crystal individual defects and factors such as temperature change and stress change is eliminated, and a reciprocity matched reflector of a sensing module optical path enables a linear electro-optical delay phase introduced by voltage to be tested to be double. According to the novel reflection type reciprocity optical voltage mutual inductor based on the Pockels effect, environment interference resistant capacity and environment adaptive capacity are improved and measuring accuracy and stability of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of optical voltage transformers, and relates to a novel reflective reciprocity optical voltage transformer based on Pockels effect and a design method of reflective reciprocity optical path. Background technique [0002] With the development of power systems towards high voltage, large capacitance, and digitization, higher performance requirements are put forward for power measurement systems. As a voltage measurement device, traditional voltage transformers are increasingly unsuitable for the development of power systems due to their inherent defects, thus promoting the emergence and development of optical voltage transformers. The optical voltage transformer is a voltage measurement device that senses the voltage information to be measured by the change of the optical signal. Optical voltage transformers have been extensively researched and developed rapidly due to a series of advantages such as small siz...

AI Technical Summary

Problems solved by technology

The sensor head as the signal sensing unit is a non-reciprocal part of the optical path, so the crystal itself produced by the electro-optic crystal manufacturing process and the additional birefringence errors introduced by factors such as temperature and stress changes will lead to the measurement accuracy, stability and reliability of the transformer. Important Factors of Poor Environmental Adaptability

In addition, the above-mentioned additional birefringence error is extremely difficult to accurately measure and quantify, so it is difficult to obtain a clear numerical expression for software compensation through theoretical analysis.

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