DEVELOPMENT OF COMPLEX SYSTEM FOR MEASUREMENT AND EVALUATION OF PD ACTIVITY
Karel Zalis
Abstract:
Expert systems are used for the evaluation of the actual state and future behaviour of insulating systems of electrical machines and equipment, especially for the evaluation of discharge activity in high voltage insulation by partial discharge (PD) measurement. Several rule-based expert systems were developed in the High Voltage Laboratory of the Czech Technical University in Prague for these purposes in the co-operation with top diagnostic workplaces in the Czech Republic. Nowadays, the complex system for the evaluation of PD measurement including software and hardware facilities has been developed. Two expert systems for the evaluation of PD activity work in this complex evaluating system: a rulebased expert system performs an amplitude analysis of PD impulses for determining the damage of the insulation system, and a neural network is used for a phase analysis of PD impulses to determine the kind of PD activity. Both expert systems operate simultaneously and special software ensures co-ordination between them.
Keywords:
dielectric diagnostics, measurement, partial discharges, artificial intelligence, expert system
