ALL-OPTICAL HIGH-VOLTAGE VOLTAGE TRANSFORMER

摘要

Provided is an all-optical high-voltage voltage transformer, comprising a high voltage induction apparatus, a shielding insulating apparatus, a sensing head and a photoelectric unit, the high voltage induction apparatus, the shielding insulation apparatus, the sensing head being located at a high voltage side and the photoelectric unit being located at a low voltage side. Light emitted from a light source (10) passes an optical path portion and is divided into two beams of orthogonal linearly polarized light and transmitted to the sensing head through a polarization maintaining fiber (1). Under the effect of an electric field, the sensing head enables the two beams of linearly polarized light to generate a phase difference; and vibration directions of the two beams of linearly polarized lights are respectively rotated by 90 degrees, so that mode exchange of the two beams of light is implemented. The two beams of linearly polarized light returned from the sensing head are transmitted back to the optical path portion for interference through the polarization maintaining fiber (1); and then a circuit portion detects an interference light intensity signal and carries out signal processing; and then, a digital signal is formed and is output.