Show simple item record

dc.contributor.authorRong, Yu
dc.date.accessioned2020-01-10T20:59:35Z
dc.date.available2020-01-10T20:59:35Z
dc.date.issued2019-12-06
dc.identifier.urihttp://hdl.handle.net/10919/96395
dc.description.abstractNumerous power electronics building blocks (PEBB) based power conversion systems have been developed to explore modular design, scalable voltage and current ratings, low-cost operations, etc. This paper further extends the modular concept from the power stage to the control system. The communication network in SiC-based modular power converters is becoming significant for distributed control architecture, with the requirements of tight synchronization and low latency. The influence of the synchronization accuracy on harmonics under the phase-shifted carrier pulse width modulation (PSC-PWM) is evaluated. When the synchronization is accurate, the influence of an increase in harmonics can be ignored. Thus, a synchronous distributed control and communication protocol with well-performed synchronization of 25 ns accuracy is proposed and verified for a 120 kHz SiC-based impedance measurement unit (IMU) with cascaded H-bridge PEBBs. An improved synchronization method with additional analog circuits is further implemented and verified with sub-ns synchronization accuracy.en
dc.format.mediumETDen_US
dc.language.isoen_USen
dc.publisherVirginia Techen_US
dc.rightsCreative Commons Attribution-ShareAlike 3.0 United Statesen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/en
dc.subjectcommunication network, distributed control, synchronization, low latency, modular power converters, SiC MOSFETen
dc.titleA Synchronous Distributed Control and Communication Network for High-Frequency SiC-Based Modular Power Convertersen
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen
thesis.degree.nameM.S.en
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical Engineeringen
dc.contributor.committeechairWang, Jun
dc.contributor.committeememberBurgos, Rolando
dc.contributor.committeecochairBoroyevich, Dushan
dc.description.abstractgeneralThe power electronics building block (PEBB) concept is proposed for medium-voltage converter applications in order to realize the modular design of the power stage. Traditionally, the central control architecture is popular in converter systems. The voltage and current are sensed and then processed in one central controller. The control hardware interfaces and software have to be customized for a specified number of power cells, and the scalability of controller is lost. In stead, in the distributed control architecture, a local controller in each PEBB can communicate with the sensors, gate drivers, etc. A high-level controller collects the information from each PEBB and conducts the control algorithm. In this way, the design can be more modular, and the local controller can share the computation burden with the high-level controller, which is good for scalability. In such distributed control architecture, a synchronous communication system is required to transmit data and command between the high-level controller and local controllers. A power converter always requires a highly synchronized operation to turn on or turn off the devices. In this work, a synchronous communication protocol is proposed and experimentally validated on a SiC-based modular power converter.en


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Creative Commons Attribution-ShareAlike 3.0 United States
License: Creative Commons Attribution-ShareAlike 3.0 United States