MODELING AND PERFORMANCE STUDY OF THREE PHASE SELF EXCITED INDUCTION GENERATOR USING MATLAB GUI

Abstract

Ihe extension of electrification is crucial to the balanced growth of a country and providing "Idectricity 10 rural areas" has proven to be a substantial challenge for engineers. The challenges in the path of rural electrification are remote and disperse locations; uneconomical and technical difficulty in grid extension; small electric load demands and low income of the rural population. the self excited induction generator (SEIG) has been found suitable for power generation from renewable energy sources and their standalone variable speed operation proves their suitability for rural electrification. 1-lowever, SEIG has not yet been able to infiltrate the customer market substantially in replacing other conventional systems. One of the major reasons in this regard has been the complicated design and complex operational analysis of SUIG. 'l'here is necessity for efforts to be made to reduce the shortcomings and successful deployment of SEIG in the field. Modefing, Analysis and Design of SEIG requires appropriate user friendly tool for one to predict the performance under different operating conditions to facilitate proper design of the system. Steady state analysis of a 3-(p SFlG is generally done through mathematical modeling of its equivalent circuit. The impedance model can be reduced in terms of two nonlinear siniultaneous equations consisting of unspecified variables as magnetizing reactance Xm and generated frequency F. The steady state performance analysis of SEIG becomes uncomplicated once the values of X 1 and F are explicitly assessed. This paper presents a MAI'LAB Graphical User Interface ((jUI) technique for determination of Xrn and F using the Newton Raphson and l'solvc optimization technique. The designed algorithm and MATLAB program for Newton Raphson and lsolve optimization technique have also been integrated in the GUI for comparative and better understanding. The simulation results obtained using the presented methodology provides the optimum values of X 1 and F. The method evaluates the advantages of I solve optimization technique over the Newton Raphson technique. MAll Al3 has proved to be an effective tool for the performance evaluation of the characteristics üf self excited induction generators. MATLAB SIMULINK and GRAPhICAL USER INlERI'ACE have made way for a user friendly environment to predict its performance. Iherefore, a system designer would require a very user friendly tool to be able to predict the performance under varying load conditions, easily design the system and fix the parameters of the components used e.g. the capacitors and VAR controllers. The versatile facility available through MATLAB tool boxes can be effectively used to provide such a software and design package to interested users. The additional windows for per unit to real value conversions would ease the designer for output analysis. This work involves experimental validation of the results obtained through performance study of SEI(I. '!'his integrated GUI tool will serve user friendly investigation of SEIG for analysis in industrial applications.