Being the interface between Energy Storage Element (ESE) and DC bus in Fuel Cell Vehicle (FCV), the high power density bidirectional dc-dc converter is an essential component of the energy management system. In this dissertation, two novel multiphase bidirectional dc-dc converters featuring high power density for FCV application are proposed. Also in this dissertation, the averaged models of the proposed three-phase bidirectional DC-DC converters are developed. In order to study the bidirectional dc-dc converter interfacing with ESE to supply and absorb the electric energy in the FCV system, both the Controller Hardware-In-the-Loop (CHIL) method and Power Hardware-In-the-Loop (PHIL) method are proposed and applied. Phase I is a pure software simulation of the original FCV system. In this phase, the bidirectional dc-dc converter and all other FCV power train components are modeled and simulated on Real Time Digital Simulator (RTDS). As a result of the fast computation through distributed parallel processing of the RTDS, the simulation can provide an accurate enough reference for the following phases. Phase II includes a controller in the simulation loop. The bidirectional dc-dc converter controller is implemented with a real hardware Digital Signal Processor (DSP), which replaces the simulated control system. This Controller Hardware-In-the-Loop increases the realism of the simulation and eliminates the unpredictable error from modeling the controller. The results from the initial phases can be utilized in the Phase III, where the actual hardware bidirectional dc-dc converter prototype is then interfaced with the ESE using Power Hardware-In-the-Loop. The main challenge of this PHIL is the requirement for a highly dynamic bidirectional Simulation-Stimulation (Sim-Stim) interface. This dissertation describes three different interface algorithms (Current-Voltage amplification, Voltage-Current amplification and Voltage-Voltage amplification). The closed-loop stability of the resulting PHIL system is then analyzed in terms of time delay and sampling rate. A prototype of the bidirectional Sim-Stim interface is designed and implemented in hardware to study the bidirectional dc-dc converter interfacing with ESE for FCV using PHIL. The results demonstrate the effectiveness of this approach. / A Dissertation submitted to the Department of Electrical and Computer Engineering in partial fulfillment of the
requirements for the degree of Doctor of Philosophy. / Fall Semester, 2010. / September 9, 2010. / Energy Storage, Bidirectional DC-DC Converter, Fuel Cell Vehicle, Power Hardware-In-the-Loop, Controller Hardware-In-the-Loop / Includes bibliographical references. / Simon Foo, Professor Directing Dissertation; Hui Li, Professor Co-Directing Dissertation; Mei Zhang, University Representative; Ming Yu, Committee Member; Chris Edrington, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_253883 |
| Contributors | Deng, Yuhang (authoraut), Foo, Simon (professor directing dissertation), Li, Hui (professor co-directing dissertation), Zhang, Mei (university representative), Yu, Ming (committee member), Edrington, Chris (committee member), Department of Electrical and Computer Engineering (degree granting department), Florida State University (degree granting institution) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource, computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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