Application of gas-insulated modules (GIM) to EHV substations

摘要

Electric power transmission and distribution market changes are driving operators to look for more economical, fast-to-implement, environment-friendly and easy-to-maintain extra-high voltage (EHV) substations (S/S). This search has led to mixed technology substations equipped with gas-insulated modules (GIM) which, in a modular arrangement, integrate several feeder functions in a compact way and are connected to air-insulated busbars, instead of traditional air-insulated (AIS) or fully gas-insulated (GIS) substations. Then, GIM use has been extended to différent applications, and to the highest voltages of transmission networks. This paper présents différent GIM applications, their spécifie needs and impacts, the solutions proposed for the equipment.