Knowledge-based system for the analysis of voltage fluctuations and flicker

Voltage fluctuations of low frequency that can cause light flicker are a power quality issue that affects several parts of the national distribution networks. In the most cases the flicker indices exceed the standards-imposed thresholds and the source of disturbance is unknown, thus becoming a troublesome situation. Considering these aspects, a knowledge-based system prototype was developed. It is dedicated to analyzing the voltage disturbances that occur in distribution networks, mainly voltage fluctuations. The paper presents the power quality issue of voltage fluctuations and flicker and the proposed artificial intelligence system.