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Electric-power machines such as generators, large rotary machines, and transformers play an important role in electrical energy delivery. Since the beginning of electrical-energy distribution to consumers, offline diagnostics of these important machines has been performed. In time-based maintenance that is based on offline diagnostics, diagnosis is carried out at regular intervals, followed by maintenance...
Measurement of partial discharges is one of the main nowadays used methods of diagnosis of electrical devices. Generators, transformers, cables and transmission lines are especially tested on the presence of PDs. New standards are being developed for the PD measurement under high frequency, for UHF measurement methods, etc. As the situation in transmission of electrical energy changes to long distance...
Each electrical insulating material or system in large electric machines is precisely designed and later monitored in operation. The task for monitoring the state of the machine is information about rest life time of such as machine. The key element of electrical machine is its electroinsulating system. For proper rest life time calculation of an insulation system it is necessary to have complete...
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