Full metadata
Title
Modeling of solid state transformer for the FREEDM system demonstration
Description
The Solid State Transformer (SST) is an essential component in the FREEDM system. This research focuses on the modeling of the SST and the controller hardware in the loop (CHIL) implementation of the SST for the support of the FREEDM system demonstration. The energy based control strategy for a three-stage SST is analyzed and applied. A simplified average model of the three-stage SST that is suitable for simulation in real time digital simulator (RTDS) has been developed in this study. The model is also useful for general time-domain power system analysis and simulation. The proposed simplified av-erage model has been validated in MATLAB and PLECS. The accuracy of the model has been verified through comparison with the cycle-by-cycle average (CCA) model and de-tailed switching model. These models are also implemented in PSCAD, and a special strategy to implement the phase shift modulation has been proposed to enable the switching model simulation in PSCAD. The implementation of the CHIL test environment of the SST in RTDS is described in this report. The parameter setup of the model has been discussed in detail. One of the dif-ficulties is the choice of the damping factor, which is revealed in this paper. Also the grounding of the system has large impact on the RTDS simulation. Another problem is that the performance of the system is highly dependent on the switch parameters such as voltage and current ratings. Finally, the functionalities of the SST have been realized on the platform. The distributed energy storage interface power injection and reverse power flow have been validated. Some limitations are noticed and discussed through the simulation on RTDS.
Date Created
2014
Contributors
- Jiang, Youyuan (Author)
- Ayyanar, Raja (Thesis advisor)
- Holbert, Keith E. (Committee member)
- Chowdhury, Srabanti (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
x, 60 p. : ill. (some col.)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.24886
Statement of Responsibility
by Youyuan Jiang
Description Source
Viewed on July 15, 2014
Level of coding
full
Note
thesis
Partial requirement for: M.S., Arizona State University, 2014
bibliography
Includes bibliographical references (p. 58-60)
Field of study: Electrical engineering
System Created
- 2014-06-09 02:09:16
System Modified
- 2021-08-30 01:35:30
- 3 years 2 months ago
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