Transient Stability Enhancement of Grid by Using Fuzzy Logic Based Statcom

Abstract

This paper proposes Fuzzy Logic Based STATCOM. It regulates the voltage at the point of common coupling (PCC) by injecting reactive power. This device also plays a vital role in enhancing stability for small and large transient disturbances in power system. Simulations using MATLAB / SIMULINK are carried out to verify the performance of STATCOM using fuzzy controller. The result shows that fuzzy logic controller is a better choice for the STATCOM compared to the PI controller. Fuzzy logic controller forces the system to return back the steady state value faster than the PI controller. The fuzzy logic controller is robust and has a fast response during disturbance and parameters variation. Detailed study of control of STATCOM has been made, which include analysis of PLL, VSC, mathematical dq transformation has been explained. Keywords-Static Synchronous Compensator (STATCOM), Pulse-Width Modulation (PWM), Fuzzy logic controller (FCL), PLL, Regulator,abcto dq transformation, Voltage Source Converter (VSC)