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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Xin Zhang Qing-Chang Zhong Wen-Long Ming Xin-Bo Ruan |
| Copyright Year | 2015 |
| Description | Author affiliation: Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China (Xin-Bo Ruan) || Dept. of Autom. Control & Syst. Eng., Univ. of Sheffield, Sheffield, UK (Xin Zhang; Qing-Chang Zhong; Wen-Long Ming) |
| Abstract | For cascaded systems, interactions among individually designed power subsystems may cause the instability of the whole system. Regulating the input impedance of the load converter is an effectively way to solve this problem, however, one big challenge of this method is how to consider the stability of cascaded system and the dynamic performance of load converter together. In light of this, this paper proposes a parallel-virtual-impedance (PVI) control strategy to improve the input impedance of the load converter. The proposed virtual impedance is in parallel with the load converter, via the proposed virtual impedances, the magnitude and phase of the input impedance of the load converter is modified only in a small range of frequency. As a result, this method not only solves the instability problem of the cascaded system, but also keeps a good dynamic performance for load converter. This paper discusses the concept, realization and design consideration of the proposed strategy in detail. Finally, a 100 W cascaded system, which consisting of an LC filter and a 48V-12V buck converter, is built to verify the correctness of the proposed $methods^{1}.$ |
| Starting Page | 1 |
| Ending Page | 6 |
| File Size | 516124 |
| Page Count | 6 |
| File Format | |
| e-ISBN | 9781479985869 |
| DOI | 10.1109/PEDG.2015.7223029 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-06-22 |
| Publisher Place | Germany |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Stability Load converter Transfer functions Power system stability Frequency conversion Cascaded system Voltage control Dynamic performance Stability criteria Resonant frequency Parallel-virtual-impedance Input-impedance-regulator Impedance |
| Content Type | Text |
| Resource Type | Article |
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