Research On Insulation Monitor For DC System

Dc system working conditions will have a direct impact on power system and communication system is safe, reliable and efficient operation. This paper is mainly studied in production site noise environment, weak signal detection technology, On this basis, using large-scale SoC technology and integrated circuit technology, combining modern circuit design, development and design method of a kind of high performance HVDC insulation monitoring devices. This paper introduces the dc system and HVDC insulation monitoring development present situation. Later, combining the characteristics of dc system leakage signals and the noise, discusses the weak signal detection method accordingly. Analyzed HVDC insulation monitoring device, and the hardware circuit design of components and parameter selection for specific instructions, And the whole system software framework and the software flow of each subsystem to do a detailed analysis. Finally the calibration system commissioning, and analyzed.