A high level voltage measuring system for high-voltage DC transmission conversion valve

The utility model discloses a high-potential voltage measurement system for the high voltage direct current transmission converter valve, which comprises a the first measuring point, a the second measuring point, a high potential voltage sensor and a photoelectric testing system. The photoelectric testing system comprises an electro-optic conversion unit, an optical fiber, an optic-electro conversion unit and a computer system. In the high-potential voltage measurement system for the high voltage direct current transmission converter valve of the utility model, the voltage signal is converted in situ to an analog optical signal and then transmitted through the optical fiber. The analog optical signal is also converted to a voltage signal. Therefore the high potential isolation issue is resolved in order to protect the safe operation of the host computer, and the interference problem of optical signals in the transmission process is also avoided.