GSM Network Management System

Abstract

In high voltage ac system, the system voltage and frequency changes rapidly with the variation of load. The reactive power also changes with the variation of load which affbcts the system voltage therefore it is necessary to analyze the power system in order to determine system parameters and its variation under various load conditions In this thesis work, in order to get an idea about the power flow nature of the transmission system of Bangladesh,42 buses are considered. The fast decoupled method is used for analyzing the power flow of 42 buses and later MATLAB coding is used for determining the buses having problem in reference system voltage. The proposed decoupled method is faster and easier than the conventional method. For reactive power compensation, the required capacitive or inductive bank is determined by using logical flow chart. The size of the reactor bank is calculated by conventional mettrod and the thryristor based switching technique is used for connecting the reactor bank with the transmission Iine according to the system requirement. Since fast switching is required for maintaining the system voltage constant under various load conditions therefore Microcontroller is usecl for controlling the switching devices. The Microcontroller provides necessary gate pulses to the Triacs which perform the switching action for connecting eitfier the capacitor or inductor bank \Mith the system. The connected capacitor and inductor also acts as a harmonic suppressor in case of harmonic effect in the transmission line. The proposed methotl of power flow analysis and reactive power compensation can be applied io aoy complicated power system network.