June 20, Prof. Rik De Doncker, representing Research CAMPUS FEN and E.ON ERC, was invited by Dr. Frans Dijkhuizen to give a talk on the role of powerelectronics in the energy transition at the Research Center of Hitachi Energy, Västerås, Sweden.
June 20, Prof. Rik De Doncker, representing Research CAMPUS FEN and E.ON ERC, was invited by Dr. Frans Dijkhuizen to give a talk on the role of powerelectronics in the energy transition at the Research Center of Hitachi Energy, Västerås, Sweden. Taking this opportunity, the day before a trip to Ludvika wasorganized to visit the HVDC and the high-voltage transformer factory. In Ludvika, Hitachi produces MMC converter for HVDC transmission systems (see Hitachi Review, Vol. 71 No. 3, 2022). To realize ultra high-voltage DC transmission systems, high-power transformers up to 1.1 Million Volt are being produced. See attached picture of a single-phase 1.1 Mio Volt transformer for ultra-high voltage DCtransmission systems. Globally, the construction of HVDC systems that are basedon IGBT technology (voltage-source) is booming, especially for off-shore windfarms, interties, etc. During the meeting the potential to constructmedium-frequency transformers for HVDC substations based on Dual Active Bridgeconverters was explored. Such DC substation transforms high-voltage tomedium-voltage, using existing MMC and three-phase inverter technology (see PhD thesis S. Cui. DOI: 10.18154/RWTH-2019-05892) and reduces substantially sizeand weight of all passive components.
