P-Q Decoupled Control Scheme Using Fuzzy Logic Control for the Unified Power Flow Controller

Abstract

This paper presents a Watt-Var decoupled control scheme using a PI fuzzy logic regulator for the Unified Power Flow Controller to improve the control performance of power system and reduce the inevitable interactions between the real and reactive power flow control parameters. To simplify the theorical analysis of the control system the 3-phase description of two-bus test power system model embedded with a UPFC is transformed into d-q components based on a synchronously rotating reference frame. Comprehensive simulation results on MATLAB program are presented and discussed to verify the effectiveness of the proposed control scheme.