Performance Evaluation Comparative Study of Dual Input non isolated DC-DC Converters for Hybrid Power Systems

摘要

Traditionally hybrid power generation systems involving same or different renewable sources as input sources AC coupled or DC coupled to the load requires an individual power electronic converter stage for each source. This type of topology needs individual controller for regulating the output voltage. This limitation can be overcome by developing multi input converters which are capable of delivering power to the load individually or simultaneously to the load. Also this methodology would require one controller for managing the power flow effectively and economically. In this paper an attempt is made to evaluate the performance parameters viz efficiency, voltage regulation and ripple in the voltage and current for different topologies of Dual input DC-DC converters which are synthesized as per definite rules and guidelines and compared. Each of the topology is designed for a fixed load and simulated in MATLAB SIMULINK platform to evaluate the performance parameters. For getting better efficiency, less voltage ripple, and less current ripple for different converters with constant output voltage by varying duty ratios. From the results comparison SEPIC topology is evident that is most suitable topology.