Abstract
This chapter highlights the issues involved in the design, development, and implementation of an on-line expert system for disturbances analysis in electrical networks.. The LAIDA expert system analyzes disturbances in the complete transport electrical network, which is divided in three voltages: (1) 132, (2) 220, and (3)380 kV. This network amounts to a total of 401 bus-bars, 296 lines, 294 transformers, 939 breakers, and 2322 switches. Within the development of these large-scale expert systems, some important issues involved are the uncertainty in the information received, the modelization of the electrical network, the strategy used to make the diagnosis comply with the previously outlined constraints, the multiple faults reasoning, and the time tracking of the disturbance. The diagnosis strategy used is to provide an initial quick result, based on heuristics, to be validated by a deeper analysis, based on the identified models of behavior of the elements of the network. The inconsistencies detected during this deep analysis may drive the system to consider a multiple faults solution.
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