Abstract
This paper proposes a novel high-gain three-port power converter with fuel cell (FC), battery sources and stacked output for a hybrid electric vehicle (HEV) connected to a dc-microgrid. In the proposed power converter, the load power can be flexibly distributed between the input sources. Moreover, the charging or discharging of the battery storage device can be controlled effectively using the FC source. The proposed converter has several outputs in series to achieve a high-voltage output, which makes it suitable for interfacing with the HEV and dc-microgrid. On the basis of the charging and discharging states of the battery storage device, two power operation modes are defined. The proposed power converter comprises only one boost inductor integrated with a flyback transformer; the boost and flyback circuit output terminals are stacked to increase the output voltage gain and reduce the voltage stress on the power devices. This paper presents the circuit configuration, operating principle, and steady-state analysis of the proposed converter, and experiments conducted on a laboratory prototype are presented to verify its effectiveness.
Highlights
Because of the rapid increase in the global population and energy consumption, electric vehicles (EVs) that use clean energy sources connected to dc-microgrids have been proposed as favorable and environmentally friendly alternatives to conventional vehicles [1,2,3,4,5]
In hybrid electric vehicles (HEVs), fuel cell (FC) stacks can be used as clean energy sources
This paper proposes a high-gain three-port power converter with FC, battery sources and stacked output for an HEV connected to a dc-microgrid
Summary
Because of the rapid increase in the global population and energy consumption, electric vehicles (EVs) that use clean energy sources connected to dc-microgrids have been proposed as favorable and environmentally friendly alternatives to conventional vehicles [1,2,3,4,5]. To provide a specific voltage level for the load and control power flow between the input sources, a power converter is required for each of the input sources; this increases the price, mass, and losses To overcome these drawbacks, multiport converters have been used in hybrid power systems [10,11,12,13,14,15,16,17,18,19,20,21]. A new nonisolated MIMO boost converter was proposed [26] This converter is used in hybridizing clean energy sources in EVs. The basic boost converter is modified and integrated; in practice, the voltage gain of the MIMO boost converter is limited owing to the losses associated with the inductor, filter capacitor, main power switch, and rectifier diode.
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