Modeling and simulation of an isolated wind Hydro Power System

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This paper presents the modeling and dynamic simulation of a Wind Hydro isolated Power System (WHPS) which comprises a Hydraulic Turbine Generator (HTG), a Wind Turbine Generator (WTG), consumer Loads and Dump Load. First the models of the hydraulic turbine together with its penstock and the wind turbine are described. The hydraulic turbine speed governor is isochronous so that the isolated system frequency is kept constant at its rated value. The Synchronous Machine of the HTG generates the system voltage and therefore, the HTG must be always running. The WTG feeds active power to the isolated system when enough wind is available, whereas its inductor generator consumes reactive power. The overall WHPS is simulated for response under load changes and steps in wind speed, giving graphical results of resulting variations in the WHPS main electric variables (system frequency, voltage and active power in each component), and main hydraulic turbine variables (flow rate, pressure head and mechanical power).

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