Zhang, Yidan and Chen, Jinlei
2026.
Switching loss reduction control for interleaved medium-voltage AC/DC converters.
IEEE Transactions on Power Electronics
41
(9)
, pp. 14501-14507.
10.1109/tpel.2026.3694169
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Abstract
A key objective of the UK's first medium-voltage dc (MVdc) project, Angle-DC, is to reduce network losses, with converter losses (around 10%) presenting significant improvement potential. To reduce the converter's switching losses, this paper presents a power-routing based coordination control strategy for the interleaved input-series-output-parallel (ISOP) converter used in Angle-DC. The control method optimizes power redistribution across submodules (SMs), with high-power SMs operating at low switching frequencies to handle most power transmission, while a low-power auxiliary SM employs fast-response hysteresis control to mitigate the total current ripple, thus reducing losses without compromising output current performance. A hardware-in-the-loop (HIL) test validates the proposed approach, showing a 38% reduction in switching losses compared to conventional power balancing methods for a full-rating system. The effectiveness of the proposed control is further partially validated using a laboratory-scale testbed.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Additional Information: | RRS policy applied |
| Publisher: | Institute of Electrical and Electronics Engineers |
| ISSN: | 0885-8993 |
| Date of First Compliant Deposit: | 3 July 2026 |
| Last Modified: | 04 Aug 2026 14:38 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/187401 |
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