| Keyword : | Interface,Environmental Harmony,Alternative Gas to SF6,Diagnosis,Sensor |
In Section 2, as equipments associated with GIS, transformers, shunt reactor condensers, power cables, foundations and earth systems, OH lines/GILs and protection and control devices are given and the overviews of interface to these equipments and the improvements of the interface technologies are introduced.
Section 3 introduces the practical performances such as supply, construction division and information on interface required for interface to each associated equipment and the electrical and the mechanical performances required for GIS by connecting with associated equipments.
In Section 4, for the environmental harmony and measures, cases of urban substations, which must require the environmental harmony and suburban large-scale substations are shown. Then, practical application cases of LCA/LCC as an evaluation procedures for the environmental harmony, approach to decreasing in SF6 gas emission for reducing the environmental load, deterioration diagnosis technologies to prolong the lifetime of equipments are described.
Section 5 mentions, as one trend of GIS technologies, the study of alternatives to SF6 gas, which influences the global heating. For single gases like N2 and CO2, SF6-mixed gases like N2/SF6 and CO2/SF6 and a new gas like CF3I, the latest knowledge is introduced. Moreover, as a trend of making GIS and substations intelligent, monitoring and protection systems, various sensors and electronic or advanced abnormal diagnosis systems are introduced. Additionally, the recent movement to standardize the UHV technologies for IEC, the technologies to suppress the switching surge on equipments for reliability improvement of substations and the current requirements for UHV systems and equipments to optimize the size by comparing the bus arrangements are described.
©2007. The Institute of Electrical Engineers of Japan