Dump power control techniques for standalone hybrid wind/solar power generation control

Abstract

With ever increasing concern on energy issues, the development of renewable energy sources is becoming more and more attractive. In the past few year the photovoltaic and wind power generation have been increased significantly. Both energy flow and operation characteristics of stand-alone wind / PV hybrid power systems are analyzed to achieve its optimal and reliable operation. Here the proposed unique standalone hybrid power generation system, applying advanced power control techniques feed to power sources; Wind power, solar power, storage battery. The objectives of the advanced power control techniques are to satisfy the load power demand and, to maintain the state of charge of the battery bank to prevent blackout and to extend the life of the batteries. The variable voltage and frequency of a generator is first rectified and controlled by a DC/DC converter before being fed to a common DC bus. The variable output voltage of the photovoltaic module is also controlled by a DC/DC converter. The DC bus collects the total power from the wind and photovoltaic systems and uses it partly to supply the required load demand and partly to charge the battery bank. Similarly the development of the active reactive power and dump power control is considered. The result of simulation revealed that amplitude and phase of AC output voltage where well regulated in the proposed hybrid system. It is anticipated that this hybrid power generation system by natural energy is incorporated, will contribute to global environmental protection on isolated islands and rural location. The system has been developed to supply power for telecommunications equipment in areas with no commercial power source.