Performance of Fuzzy Logic Based Controller for UPFC on Power Quality Issues in Transmission Network

The extension of Transmission network is highly important because of the power transfer capability impingement of transmission lines on power market business but at present moment the new extension of the transmission network is confined because of the substantial contemplation, financial issues and potential health trappings of the electromagnetic field. This consistently growing need for electric power has formed it necessary to employ the accessible transmission network assets. The implementation of flexible AC transmission system (FACTS) might be fruitful choice to enhance power flow capacity (PFC) in existing transmission network. FACTS devices diverse the tracks of exchanged power over transmission lines through changing bus voltage angle, the reactance of transmission lines. In this work, a miniature of Unified Power Flow Controller is modified with Fuzzy Logic (FL) based shunt and serial controllers to increase the power network stability. Fuzzy control is employed in the control scheme of UPFC and Pulse width modulation. A critical case of 3 phase fault occurrence in a power system has been studied. The results are compared with the presence and absence of UPFC. Simulations have been accomplished on MATLAB/Simulink software. To present the effectiveness of purposed controller, the obtained outcomes have been also compared with PID controller. It reveals that the Fuzzy Logic based UPFC has the best performance over PID Controller.