DEVELOPMENT OF AN EVAPORATION-COOLED UNDERGROUND TRANSMISSION SYSTEM

摘要

Growing economic and aesthetic pressures encourage the development of advanced underground transmission (UT) systems for bulk electric power. An attractive general approach is the incorporation of forced-cooling in otherwise conventional compressed-gas-insulated (CGI) cables. Forced evaporation cooling is one of several specific options with the potential of significantly increasing UT capacity and thereby reducing-relative transmission costs.n• STUDY OBJECTIVEnThe objective of this study was to investigate the development potential of a particular and novel configuration, described in this report as the Separated-Phase, Evaporation Cooling (SPEC) concept.n• CONCEPT CONFIGURATIONnForced-cooling would be provided by the evaporation of a halocarbon in the hollow conductors of a CGI cable system. Heat generated by electrical losses in the conductors is partially absorbed in the vaporization process.