Design and Energy Management of Three-Port Converter for PEMFC Hybrid Power System

Proton Exchange Membrane Fuel Cell (PEMFC) hybrid power system has attracted widespread attention due to its high efficiency and environment-friendly characteristic, in which DC/DC converters with remarkable performance and superior energy management strategies occupy a dominant position. In this paper, a novel single-inductor Three-Port converter is proposed, which combines fuel cell and battery to form a hybrid power system. A power tracking control method is also implemented to switch the operating modes of the system according to the load demand power and the power source state, in which different voltage or current regulators in various working modes are developed to meet the requirements of steady-state and dynamic performance. The results of simulation and experiment indicate that multiple working modes can be flexibly switched under different load conditions, which verifies the effectiveness of the proposed Three-Port converter and control strategy for PEMFC hybrid power system.