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Content Provider | IEEE Xplore Digital Library |
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Author | Xin Zhang Xinbo Ruan Qing-Chang Zhong |
Copyright Year | 1982 |
Abstract | Interactions between individually designed power subsystems in a cascaded system may cause instability. This paper proposes an approach, which connects a virtual impedance in parallel or series with the input impedance of the load converter so that the magnitude or phase of the load converter's input impedance is modified in a small range of frequency, to solve the instability problem of a cascaded system. The requirements on the parallel virtual impedance (PVI) and series virtual impedance (SVI) are derived, and the control strategies to implement the PVI and SVI are proposed. The comparison and general design procedure of the PVI and SVI control strategies are also discussed. Finally, considering the worst stability problem that often occurs at the system whose source converter is an LC filter, two cascaded systems consisting of a source converter with an LC input filter and a load converter, which is either a buck converter or a boost converter, are fabricated and tested to validate the effectiveness of the proposed control methods. |
Sponsorship | IEEE Industrial Electronics Society |
Starting Page | 7499 |
Ending Page | 7512 |
Page Count | 14 |
File Size | 2949232 |
File Format | |
ISSN | 02780046 |
Volume Number | 62 |
Issue Number | 12 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2015-01-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Impedance Band-pass filters Transfer functions Voltage control Frequency conversion Stability criteria Resistors input-impedance-regulator Cascaded system instability problem load converter dynamic performance parallel-virtual-impedance series-virtual-impedance series virtual impedance (SVI) input impedance regulator (IIR) parallel virtual impedance (PVI) |
Content Type | Text |
Resource Type | Article |
Subject | Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications |
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