Optical sensing device for restraining voltage sensor temperature error

Abstract

The invention discloses an optical sensing device for restraining a voltage sensor temperature error and belongs to the field of an optical voltage sensor. The optical sensing device comprises an optical transmission unit and a Pockels phase sensing unit. The reciprocity degeneration of the Pockels phase sensing unit is caused by the inconsistency of the temperature fields and stress fields of two crystals; and the generation of a measuring error of the optical voltage sensor is caused by the influence of the non-ideal welding angle and counter shaft angle of the optical transmission unit on the magnitude of interference light intensity and feedback phase. By establishing a temperature error model of the optical transmission unit and the Pockels phase sensing unit, a novel optical base structure for counteracting additional stress birefringence in the two crystals is designed, and an angle error compensating method is provided, so that the measuring precision and temperature stability of the optical voltage sensor are increased.

Description

technical field [0001] The invention belongs to the technical field of optical voltage sensors, and in particular relates to an optical sensing device for suppressing temperature errors of voltage sensors. Background technique [0002] The power system is the lifeblood of the national economy, and the power industry is directly related to the healthy and stable development of the national economy. With the development of the power industry, the transmission capacity of the power system continues to increase, and the voltage operation level is getting higher and higher. The power grid is developing in the direction of digitization, intelligence and networking. The smart grid is the intelligence of the power grid. It is based on an integrated, high-speed two-way communication network, through the application of advanced sensing and measurement technology, advanced equipment technology, advanced control method and advanced decision support system technology. , to achieve the g...

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Problems solved by technology

[0006] The present invention aims at the complex temperature-changing environment of the smart grid, which will lead to the problem of reciprocity degradation of the Pockels phase sensitive unit in the reflective double-crystal optical voltage sensor. At the same time, in order to control the temperature error generated by the double-crystal optical voltage sensor caused by the temperature-changing environment, An optical sensing device that suppresses the temperature error of the voltage sensor is proposed to ensure and improve the detection accuracy of the optical voltage sensor, maintain long-term working stability, and promote its practical progress

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