Solid-state transformers and their bus voltage equalization methods
By introducing a bus voltage balancing module and module controller into the solid-state transformer, the energy of the bus capacitors of each stage of the cascaded modules is consumed, thus solving the problem of bus voltage imbalance caused by differences in device parameters. This achieves low-cost and highly applicable bus voltage balancing, ensuring the normal operation of the solid-state transformer.
CN114641926BActive Publication Date: 2026-05-26HUAWEI DIGITAL POWER TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAWEI DIGITAL POWER TECH CO LTD
- Filing Date
- 2021-01-29
- Publication Date
- 2026-05-26
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Figure CN114641926B_ABST
Abstract
A solid-state transformer and its bus voltage equalization method are provided. The solid-state transformer may include multiple cascaded modules (M1-Mn) and a bus voltage equalization module (10, 20A, 20N, 30A, 30N). The input terminals of each cascaded module are connected in series, and the output terminals of each cascaded module are connected in parallel as the parallel output terminals of the solid-state transformer. The bus voltage equalization module is connected in parallel to the parallel output terminals of the solid-state transformer. Each cascaded module may include bus capacitors (C1-C4, 1, n). The bus voltage equalization module can equalize the bus voltage of each cascaded module by consuming part of the energy of the bus capacitors in each cascaded module, resulting in low cost and wide applicability.
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