The present invention provides a kind of
high voltage direct current broadband domain
corona current measurement
system, including the sampling resistance sensor, the UHV local end measurement unit, the
optical fiber transmission unit, the safe location measurement unit and the upper monitor; The sampling resistance sensor samples the
corona current
signal of the HVDC line, and converts the
corona current
signal to the
voltage signal, the UHV local end measurement unit collects the
voltage signal, and obtains the optical signal by
photoelectric conversion, the optical signal transforms to the safe location measurement unit by the
optical fiber transmission unit, the safe location measurement unit converts the optical signal to the
voltage signal, the host computer performs
processing, storing and displaying with the voltage signal. The present invention has a wide range of measuring frequency, strong ability of anti-
electromagnetic interference and other advantages, also can running in long-term
stable status under the condition of the UHV DC and all kinds of bad natures, this provides effective technological means for further research on the character of the UHVDC corona.