Huge wind power plant (WPP) penetration in electric power systems can cause some problems. These problems will affect the power system's steady-state and dynamic performances. Information about the steady-state performances of an electric power system is usually obtained from load flow analysis. The most crucial step in the analysis is modeling all power system components, including the WPP. This book is devoted to developing steady-state load flow models of fixed-speed WPP. The methods for incorporating the models into load flow analysis are also presented in this book. The present book also gives extensive validation studies to verify the developed WPP models and their integration techniques.