FUTURE MVDC POWER DISTRIBUTION NETWORKS
How to design MW-level medium frequency transformers
MVDC grids are increasingly present in the existing AC systems regarding integration of renewable energy resources. This creates the need to master the design of medium-frequency transformers, one of the key components of modern DC transformers.
This paper presents the design and development of a 1 MW, 5 kHz medium frequency transformer prototype, which combines specific technologies regarding cooling and insulation. The design is achieved with the help of a model-based optimization tool, built around elaborate analysis and modeling of transformer specific phenomenon concerning its electrical operation.
This whitepaper presents a MW-rated medium frequency transformer design and explains:
- how to design and implement liquid-cooled hollow copper conductors as windings,
- what to keep in mind when windings are oil-immersed for insulation purposes,
- how to use nanocrystalline as magnetic core material.
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