a linearized large signal model of an lcl-type resonant converter
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2015
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Abstract
In this work, an LCL-type resonant dc/dc converter with a capacitive output filter is modeled in two stages. In the first high-frequency ac stage, all ac signals are decomposed into two orthogonal vectors in a synchronous rotating d–q frame using multi-frequency modeling. In the dc stage, all dc quantities are represented by their average values with average state-space modeling. A nonlinear two-stage model is then created by means of a non-linear link. By aligning the transformer voltage on the d-axis, the nonlinear link can be eliminated, and the whole converter can be modeled by a single set of linear state-space equations. Furthermore, a feedback control scheme can be formed according to the steady-state solutions. Simulation and experimental results have proven that the resulted model is good for fast simulation and state variable estimation.
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li2015energiesa
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| Authors | ;Hong-Yu Li;Xiaodong Li;Ming Lu;Song Hu |
| Journal | acs combinatorial science |
| Year | 2015 |
| DOI |
10.3390/en8031848
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