Broadband optical voltage sensor suitable for traveling wave protection and traveling wave protection system

The invention discloses a broadband optical voltage sensor suitable for traveling wave protection, which comprises a capacitive voltage divider, an optical sensor module and a photoelectric conversion module, and is characterized in that the optical sensor module is connected to two ends of a medium-voltage capacitor of the capacitive voltage divider in parallel, is passive in sensing, does not need energy supply, converts the voltage of a primary side into the deflection angle of light, and outputs the deflection angle of the light; the invention further discloses a traveling wave protection system, the traveling wave protection system comprises the optical voltage sensor and the traveling wave protection device, and the traveling wave protection device receives the electric signals and achieves the protection function. According to the invention, the voltage obtained by voltage division of the capacitive voltage divider can be output to the photoelectric conversion module in an undistorted manner through th