A High Voltage Sensing Optical Voltage Transformer

Abstract

The invention relates to a high-tension sensing optical voltage transformer comprising an insulator, a high-voltage electrode, a transformer shell, an insulating device, a seal ring, a transformer enclosure, an optical voltage probe, an optical fiber and an electrical unit. The insulator is fixedly connected to one end of the transformer shell. One end of the high-voltage electrode extends into the transformer shell through the insulator and fixedly connected with the insulator. The insulating device is fixedly connected to the other end of the transformer shell. The upper surface of the insulating device is communicated with the inside of the transformer shell. The lower surface of the insulating device is communicated with the inside of the transformer enclosure. The transformer enclosure is fixedly connected with the transformer shell or the insulating device. The optical voltage probe is disposed at the inner bottom of the transformer enclosure. The optical fiber connected with the optical voltage probe is led to the electrical unit outside the transformer enclosure. The high-tension sensing optical voltage transformer has the advantages that measurement precision can be improved, the size is small, the weight is light, the insulating property is good, the shielding effect is good, the application ways are flexible and safety is high.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a high-voltage sensing optical voltage transformer. Background technique [0002] The power system has always used electromagnetic or capacitive voltage transformers (PT or VT) to measure the primary side voltage and provide voltage signals for metering and protection equipment. These transformers have the advantages of high measurement accuracy in the linear range, mature manufacturing process, and standardized test and calibration, and have adapted to the requirements of power system development for a long time. However, with the improvement of the voltage level and capacity of the power system, and the continuous improvement of measurement and protection requirements, its shortcomings are becoming more and more prominent. The main problems include: difficult insulation, small dynamic range, and the output signal of the transformer. It cannot directly interface with...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of large volume, heavy weight, high cost, poor safety and reliability, and low measurement accuracy existing in existing optical voltage transformers, and provides a new type of high-voltage sensing optical voltage transformer. When the voltage sensing head is isolated from the high-pressure gas chamber, the high-voltage electric field can also be applied to the optical voltage sensing head, which can improve the measurement accuracy. It has small size, light weight, good insulation performance, good shielding effect, and flexible application methods. Advantages of high security

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