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This paper presents power flow models of a self-excited induction generator. These models are used for steady-state power flow calculation in electric power systems in which a generating plant driven by renewable energy sources, such as wind energy, is connected to partially serve loads.?? This research demonstrates the induction generator by two forms: i) power (PQ) model and ii) admittance (Y) model. Solution convergence and model accuracy are observed in order to predict power flow distribution through feeder lines resulting from the grid connection of a renewable power plant. From the proposed models, voltage profiles of the system can be calculated. To verify the effectiveness of the proposed models, standard IEEE 37-node, 118-node test feeders and a 22-kV power distribution systems in Nakhon Ratchasima, Thailand, were examined. In addition, satisfactory results can be employed to develop system stability analysis and operation planning in order to prevent supply service interruption and conserve the overall electrical energy. [ABSTRACT FROM AUTHOR]