Smart MV/LV distribution transformer for Smart Grid with active prosumer participation
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Abstract
With the development of distribution networks and their gradual transformation into intelligent Smart Grid type networks the relevance and share of controlled power converter systems used as interfaces between energy sources and the grid, and between grid and the recipients, will grow. This paper elaborates on the concept of replacing conventional 50 Hz distribution transformers with intelligent distribution transformers. A solution of a three-stage smart distribution transformer of modular design is poposed, oriented to connecting prosumers as active recipients of electricity with enhanced reguirements, and owners of small renewable energy systems (RES). Two active stages: AC-DC on the MV side and DC-AC on the LV side provide the ability to comensate reactive power and shape voltage parameters. The simulation results presented here confirm that the smart transformer's intermediate stage, through the use of isolated DC-DC converters with high-speed semiconductor devices, provides the ability to quickly adjust the power flow between the primary and secondary sides.
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References
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