Development of intelligent gas insulated switchgear using electronic technology

The digital control panel and electronic instrument based microprocessor techniques for GIS (gas insulated switchgear) has been developed. Extensive electronic upgrading including digital control mechanisms permits the entire system to be made more compact compared to conventional systems using electromagnetic relays and magnetic core, and enables monitoring functions to be integrated within the power network system. This system is composed of hardware units and software programs. The hardware units employ digital electronic circuits and microprocessor based digital controller. The software programs implement the functions of local control panel for GIS. This greatly improves reliability and availability of the GIS control circuits. New technologies have to be developed to provide users with better service quality in terms of precision, operating safety and interoperability. In this paper, digital control panel and electronic instrument as components of intelligent GIS are described about overview and results of the various performance tests.