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In Gas Insulated Switchgear (GIS) the loop resistance is a key parameter which can characterize the contact condition of the conductive circuit. The current method to measure loop resistance was mostly proposed and used in routine test, commissioning test and overhaul. The monitoring of abnormal conditions of contacts in operation has not been realized yet. To early detect the hidden contact defects...
Rotor losing field is one significant accident for turbo generator. Combining the FEM with the electrical circuit equation, a mathematical model of the turbo generator with losing field is established in this paper, witch takes into account the pole geometry, slot effects, saturation and eddy current. The transient behavior and electrical parameters when turbo generator loses field with open exciting...
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