Analysis of Voltage Sag and Swell Using Modern Technique

Dhiraj Singh, Preet Verma, Kartik Sharma, Meetu Nag

Power Quality, Fuzzy Controller, Fuzzy Expert System, Extraction of Features, Membership Functions.

The power quality (PQ) requirement is one of the most important issues for power companies and their customers. The power quality disturbances like voltage sag, swell, notch, spike and transients are analyzed using various techniques. One of the important aspects in power quality assessment is automated detection and classification of power quality disturbances which requires the use of artificial intelligent techniques. This paper presents the application of fuzzy-expert system for classification of short duration voltage disturbances which include voltage sag, swell and interruption. A fuzzy-expert system has been developed to set the fuzzy rules with inputs and outputs. The system is designed for detecting and classifying the three types of short duration voltage disturbances.