STEADY STATE PERFORMANCE EVALUATION OF SELF EXCITED INDUCTION GENERATOR FOR SHP

Abstract

The soaring rates of fossil fuels depletion over the last two decades combined with growing concern about pollution of the environment have led to an accelerated search for renewable energy system. This accelerated drive led to a gradual tapping of the vast hydro energy potential available in isolated locations of the world. In most cases these generating units have to operate at remote, unattended sites. Thus the use of self-excited induction generator becomes more promising than synchronous generators for harnessing the renewable energy resources such as small hydro. The poor voltage regulation under varying load is the maj or drawback of the induction generator. The steady state analysis is paramount as far as the running conditions of machine are concerned. To study the steady state aspects, methods are required by which the generator performance is predicted by using the induction motor data so that the effect of the parameters can be assessed. The steady-state analysis of self-excited induction generators (SEIG) under balanced conditions using Newton Raphson method is presented. MATLAB programming is used to predict the steady state behavior of self-excited induction generator. In this thesis, loop impedance technique has been incorporated for the set of non linear equations to evaluate per unit frequency and magnetizing reactance values. For this purpose, various tests have been conducted in the laboratory to determine_ the different parameters of induction generator also the performance of induction generator has been analyzed under different operating conditions with constant prime mover speed. Validation of simulated results with experimental results are also been carried out.