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Comparison of the Modular Multilevel DC Converter and the Dual-Active Bridge Converter for Power Conversion in HVDC and MVDC Grids
2015 / IEEE
This item from - IEEE Transaction - Power, Energy and Industry Applications - It is expected that in the near future the use of high-voltage dc (HVDC) transmission and medium-voltage dc (MVDC) distribution technology will expand. This development is driven by the growing share of electrical power generation by renewable energy sources that are located far from load centers and the increased use of distributed power generators in the distribution grid. Power converters that transfer the electric energy between voltage levels and control the power flow in dc grids will be key components in these systems. The recently presented modular multilevel dc converter (M2DC) and the three-phase dual-active bridge converter (DAB) are benchmarked for this task. Three scenarios are examined: a 15 MW converter for power conversion from an HVDC grid to an MVDC grid of a university campus, a gigawatt converter for feeding the energy from an MVDC collector grid of a wind farm into the HVDC grid, and a converter that acts as a power controller between two HVDC grids with the same nominal voltage level. The operation and degrees of freedom of the M2DC are investigated in detail aiming for an optimal design of this converter. The M2DC and the DAB converter are thoroughly compared for the given scenarios in terms of efficiency, amount of semiconductor devices, and expense on capacitive storage and magnetic components.
Engineered Materials, Dielectrics And Plasmas
Fields, Waves And Electromagnetics
General Topics For Engineers
Modular Multilevel Dc Converter (m2dc)
Signal Processing And Analysis
Dc-dc Power Converters
Dc Collector Grid
Dual-active Bridge (dab) Converter
Computing And Processing
Components, Circuits, Devices And Systems
Communication, Networking And Broadcast Technologies
Power, Energy And Industry Applications