This book considers the methods electrical energy renewable sources simulations with SimPowerSystems. Approximately 150 models of renewable energy sources made with the use of SimPowerSystems are appended to the book. The aim of these models is to help with the understanding of SimPowerSystems; to expand on the various electrical engineering fields: industrial electronics, electrical machines, electrical drives, production, and distribution of the electrical energy; to facilitate understanding of various renewable energy system function; and to function as a basis for development of the reader's own systems in this field.