Standard-Cell, Open-Architecture Power Conversion Systems

Abstract

EXECUTIVE SUMMARYThis Final Report compiles all the work carried out at the Center for Power Electronics Systems (CPES), corresponding to the "Standard-Cell, Open-Architecture Power Conversion Systems" project sponsored by the Office of Naval Research (ONR). This project was purposefully aimed to develop a standardized hierarchical design and analysis methodology for modular power electronics conversion systems using as basis the ISO/OSI seven layer reference model. The foundational ideas of this engineering vision came from the Power Electronics Building Block (PEBB), seeking to expand the usage of this concept while exploiting the numerous advantages offered by it, namely modularity, scalability, reconfiguration and reduced design cycles. The mean to the end chosen was the actual embracing of the hierarchical nature of PEBB-based converters by applying it to the modeling approach, control software, and energy processing characterization of power electronics systems. The resultant two-dimensional hierarchical reference model pursues the complete analysis and design of power electronics systems, covering not only the electromagnetic, thermal and mechanical interactions from semiconductors up to complete power systems, but also their associated controls, modeling and communications at every hierarchy level. In order to achieve these objectives several tasks were identified and undertaken in this project. Specifically, several studies were conducted in order to fully characterize the energy processing functions observed in shipboard power systems, individually addressing the PEBB, power converter and power system levels. The PEBB level---using a CPES built 33 kW PEBB--was subjected to a complete study describing it across all defined hierarchies, i.e., energy processing, controls and modeling. Further, the complete design and evaluation of its digital controller (Hardware Manager) is also presented, thus fully characterizing the controls hierarchy at this level. The PESNet communications protocol developed in this project is also presented and described in details complementing the controls hierarchy analysis. Additionally, in an effort to explore the feasibility of applying the proposed reference model to different marine-like applications, the usage of PEBB-based distributed generation converters and the design and evaluation of protection systems for power electronics systems is also included. Regarding the modeling hierarchy of the proposed reference model, an in-depth revision of hierarchical modeling techniques for power converter systems is presented, focusing on the modeling of PEBB's and more involved PEBBbased power converter structures. Finally, a thorough coverage of the control software hierarchy is presented by assessing the advantages of employing dataflow-based programming techniques for the development of modular controls for power electronics systems. In all, the results obtained in this project have successfully verified the capabilities and great flexibility of the proposed power electronics st...

Transient study of DC Zonal Electrical Distribution System in Next Generation Shipboard Integrated Power Systems using PSCAD™

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