A New Model Wind Energy for a Stand Alone Wind Energy System

This paper presents control scheme for a stand-alone wind energy conversion system. Present energy need heavily relies on the conventional sources. But the limited availability and steady increase in the price of conventional sources has shifted the focus toward renewable sources of energy. Of the available alternative sources of energy, wind energy is considered to be one of the proven technologies.With a competitive cost for electricity generation, wind energy conversion system (WECS) is nowadays deployed for meeting both grid-connected and stand-alone load demands.However, wind flowby nature is intermittent. In order to ensure continuous supply ofpower suitable storage technology is used as backup. In this paper,the sustainability of a 4-kW hybrid of wind and battery system isinvestigated for meeting the requirements of a 3-kW stand-alonedc load representing a base telecom station. A charge controller forbattery bank based on turbine maximum power point tracking andbattery state of charge is developed to ensure controlled chargingand discharging of battery. The mechanical safety of the WECSis assured by means of pitch control technique. Both the controlschemes are integrated and the efficacy is validated by testing itwith various load and wind profile