Steady State Analysis of Wind Turbine Generators Interconnected to the Grid

A preliminary analysis on the impact of wind power penetration into the grid is presented. The purpose of the work is to develop consistent simulation tools in order to analyze the steady state impact of the interconnection of wind turbine generators (WTG) to the utility grid. Conclusions regarding the impact are drawn from the power flow analysis, in which the steady state model of the induction machine is considered. The usual N-R method of power flow is modified to include the WTG bus. The convergence characteristics of this modified N-R method (simultaneous method) is compared with the usual sequential methods of power flow and it is found that the simultaneous method is faster and results in less number of iterations. The impact of increasing the number of wind turbines in the wind farm is studied. A method is suggested to strengthen the given network between the point of common coupling (PCC) and the rest of the grid. Simulation results show that this helps in accommodating more wind turbines in the wind farm. Simulation studies are done on a 9-bus radial system, using C++ programming language and the results obtained are presented