A New Voltage Control Euipment using Fuzzy Inference

Abstract

Power system control equipment needs higher sensitivity and operational reliability than convential one. Advanced voltage control equipment needs reducting the frequency of tap changes and improving the characteristics (the relationship between the actual voltage and reference voltage) of the voltage meet today's power system requirement. However, these objectives are in a trade-off relationship. Studies of voltage control based on knowledge base suitable for electric power systems can satisfy these objectives using fuzzy inference. Comparing with a corresponding conventional equipment, the new equipment improved the deviation of 30min. average voltage of 30%.
This paper describes the design concept of new voltage control equipment using fuzzy inference. In addition, performance of field test results are described along with rules fo fuzzy inference, membership functions, and the deviation of 30min. average voltage through the detailed simulation.