Venkatramanan, D and John, Vinod (2013) Integrated higher-order pulse-width modulation filter-transformer structure for single-phase static compensator. In: IET POWER ELECTRONICS, 6 (1). pp. 67-77.
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Abstract
A power filter is necessary to connect the output of a power converter to the grid so as to reduce the harmonic distortion introduced in the line current and voltage by the power converter. Many a times, a transformer is also present before the point of common coupling. Magnetic components often constitute a significant part of the overall weight, size and cost of the grid interface scheme. So, a compact inexpensive design is desirable. A higher-order LCL-filter and a transformer are increasingly being considered for grid interconnection of the power converter. This study proposes a design method based on a three-winding transformer, that generates an integrated structure that behaves as an LCL-filter, with both the filter inductances and the transformer that are merged into a single electromagnetic component. The parameters of the transformer are derived analytically. It is shown that along with a filter capacitor, the transformer parameters provide the filtering action of an LCL-filter. A single-phase full-bridge power converter is operated as a static compensator for performance evaluation of the integrated filter transformer. A resonant integrator-based single-phase phase locked loop and stationary frame AC current controller are employed for grid frequency synchronisation and line current control, respectively.
Item Type: | Journal Article |
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Publication: | IET POWER ELECTRONICS |
Publisher: | INST ENGINEERING TECHNOLOGY-IET |
Additional Information: | Copyright of this article is belongs to INST ENGINEERING TECHNOLOGY-IET |
Department/Centre: | Division of Electrical Sciences > Electrical Engineering |
Date Deposited: | 10 Sep 2013 05:44 |
Last Modified: | 10 Sep 2013 05:44 |
URI: | http://eprints.iisc.ac.in/id/eprint/47089 |
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