A Practical Fast Acting Control Scheme for Fuzzy Logic-Based Voltage Stabilisation Control

Abstract

This paper presents a simplified control model for stabilising a load voltage using a switched reactor in parallel with a fixed capacitor of static VAR compensator. Two IGBT’s are used to control the reactance of the switched reactor. A uniform pulse width modulation is used for controlling the two switches. The compensator has a simple control circuit and structure. A complete modelling and numerical simulation for the proposed systems are presented. A high speed Digital Signal Processor is used for implementing proportionalintegral (PI) and fuzzy load voltage controllers. Experimental results indicate the superiority of fuzzy logic control over the conventional proportional-integral control method. Simulation results are reported and proved to be in good agreement with the relevant experimental results.