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- W4376458051 abstract "The on-load tap-changer (OLTC) is the core component of the converter transformer, which can realize the non-power-off and load regulation of the winding turns on the converter transformer grid side. At present, the transformer onload voltage regulation technology is a mechanical OLTC. However, as the scale of the power system becomes larger and the structure becomes more complex, the mechanical OLTC has two difficult problems to solve. One is that the mechanical contacts generate arcs during the switching process, and the other is that the mechanical transmission structure is complex, the failure rate is high, and the maintenance is large. Aiming at the shortcomings of mechanical OLTC, this paper proposes a hybrid OLTC topology, which uses power electronic devices to replace the vacuum interrupter, has the advantages of no arcing in the switching process, simple switching core structure, real-time monitoring of operation status and so on. Based on the technical parameters of the ±800kV OLTC, the working principle and switching sequence of the OLTC are analyzed, the ±800kV hybrid OLTC prototype is developed, and the test verification are carried out. The results show that the design of the hybrid on-load tap-changer is correct." @default.
- W4376458051 created "2023-05-14" @default.
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- W4376458051 date "2022-11-11" @default.
- W4376458051 modified "2023-10-16" @default.
- W4376458051 title "Research on Key Technology of Hybrid On-Load Tap-Changer for UHV Converter Transformer" @default.
- W4376458051 doi "https://doi.org/10.1109/ei256261.2022.10116612" @default.
- W4376458051 hasPublicationYear "2022" @default.
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