Multilevel STATCOM Using Fuzzy Logic Controller in a Transmission Line for Voltage Control

This paper deals with the voltage stability analysis and voltage control with multilevel voltage source converter based static synchronous compensator (STATCOM). The main objective of this paper is to maintain the voltage stability by compensating the reactive power in the power system. Hence, a new efficient control method is proposed to reduce the voltage fluctuations like sag and swell conditions and also isolate current and voltage harmonics in the transmission lines. In this transmission system the multilevel stat-com this can be used at the point of common coupling (PCC) to compensate voltage fluctuations. By applying 110kV transmission line with and without stat-com the performance can also compared. In this paper FUZZY LOGIC CONTROLLER method is used for reducing the total harmonic distortion (THD) there by it improves the power quality