Extra-high voltage direct current insulator leakage current measuring system

The invention provides an extra-high voltage direct current insulator leakage current measuring system which comprises a measuring system remote terminal, a measuring system local terminal and a telecommunication module, wherein the telecommunication module is used for achieving data transmission between the measuring system remote terminal and the measuring system local terminal. The measuring system remote terminal comprises a first power supply unit, an insulator leakage current sensor, a high speed data acquisition card and an electric light converting unit. Leakage current signals measured by a leakage current collecting device is collected by the high speed data acquisition card, transmitted to the electric light converting unit and converted to digital optical signals. The measuring system local terminal comprises a second power supply unit, a photovoltaic conversion unit and a computer display control center. The digital optical signals are converted to digital electrical signals through the photovoltaic conversion unit and transmitted to the computer display control center to be monitored. According to the extra-high voltage direct current insulator leakage current measuring system, measuring requirements of the insulator leakage current of an extra-high voltage direct current section can be met. The extra-high voltage direct current insulator leakage current measuring system has the advantages of being high in speed, safe, reliable in measurement and the like. Filthy states of the insulator can be fast reflected, and the extra-high voltage direct current insulator leakage current measuring system is especially suitable for field environment operation.