MODELLING THE BI-BUCK INTERFACE FOR INVERTER CURRENT RIPPLE COMPENSATION

In this paper is proposed flexible power architecture for an energy generation system which uses a fuel cell stack as main DC energy source. The paper is an analysis of ways of solving the main problems that arise in such systems, insist on the role of passive and active filters in reducing the fuel cell current ripple. The bi-buck structure is used as active power interface between fuel cells stack and inverter system. The control performances of the proposed bi-buck power interface, concerning the fuel cell current ripple, are subject to the other authors’ paper [1]. The bi-buck structure is implemented and simulated in MATLAB-SIMULINK using different inverter input current patterns. All other used models and some designing aspects are presented, too.