Load flow analysis has always been used in determining the steady-state operation of an electric power or distribution system. For conventional power system without wind turbine generator, the method for load flow analysis has been well established. However, for modern system embedded with wind turbine generator, the investigation of analysis method is still an active research area. This paper proposed a new method to integrate fixed-speed wind turbine generator into distribution system load flow analysis. The proposed method is derived based on two-port network theory where the parameters of induction generator of the wind turbine generator are embedded in general constants of the two-port network. The proposed method has been tested and verified using a representative electric distribution system.

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The steady‐state models of electric power system components are crucial for the analysis of system load flow or preliminary study of the system stability. At present, penetration of wind power plant (WPP) in power system continues to increase, and its modelling development and investigation is also still a very active research area. This paper proposes a simple technique for modelling doubly fed induction generator (DFIG)‐based WPP to be used in power system steady‐state (i.e. load flow) studies. In the proposed method, derivation of the WPP mathematical model is carried out based only on power formulations of the WPP, namely, DFIG power output and turbine mechanical power input formulas. Detailed power converter modelling, which is usually quite complicated, is not required in the proposed method. Case studies are also presented in this paper where the proposed model is applied to a simple system as well as to multi‐bus systems. In the studies, the model is tested for various wind speeds ranging from 5 to 12 m/s. With these wind speeds, it is found that power outputs of the WPP vary around 0.1 to 2.1 MW. This result also indicates that the proposed DFIG model is valid both for sub‐synchronous and super‐synchronous conditions.

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