BGO (Bismuth Germanium Oxide) crystal electro-optic coefficient temperature relevancy self-compensation device and method

Abstract

The invention provides a BGO (Bismuth Germanium Oxide) crystal electro-optic coefficient temperature relevancy self-compensation device and method. The BGO crystal electro-optic coefficient temperature relevancy self-compensation device comprises a faraday collimation optical rotation device, a quartz tube, an antireflection film, a reflective film, a BGO crystal and a base; the faraday collimation optical rotation device comprises a collimating lens and a faraday optical rotation device; the collimating lens and the faraday optical rotation device are packaged inside the quartz tube; an antireflection film and a reflective film plate two ends of the BGO crystal; the quartz tube and the BGO crystal are installed on the base. According to the BGO crystal electro-optic coefficient temperature relevancy self-compensation device and method, faraday optical rotation device optical rotation angle temperature characteristics and influences thereof to an optical voltage transformer transformation ratio are utilized to automatically compensate BGO crystal electro-optic coefficient measuring error caused by temperature variation on line.

Description

technical field [0001] The invention relates to a device and a method, in particular to a self-compensating device and method for the temperature dependence of the electro-optical coefficient of a BGO crystal. Background technique [0002] Voltage transformer is one of the most important primary equipment in power system, its measurement accuracy and reliability are closely related to the safe, reliable and economical operation of power system. The main functions of the voltage transformer include: converting the high voltage of the primary line into a low-voltage standard electrical signal, providing voltage information for the secondary measurement and protection device; realizing electrical isolation between the primary equipment and the secondary equipment, ensuring that the staff and the secondary equipment secondary device security. At present, the voltage transformers widely used in power systems are electromagnetic and capacitive voltage divider voltage transformers...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to add a temperature sensor to the system, and for the special high-voltage measurement environment of the power system, it is also necessary to solve its insulation problem; at the same time, it is necessary to design a corresponding temperature compensation algorithm and write compensation software according to the model

Therefore, this method of temperature compensation greatly increases the software and hardware costs of the system

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