| Abstract |
In MVDC distribution applications, input-series-output-parallel (ISOP) configurations are often used in Power Electronics Transformers (PET) to achieve high voltage level on the MVDC side and high voltage ratio conversion. In the paper, 2 feasible DAB based submodule topologies are compared in ISOP DC PETs from a system-level aspect. With the proposed parameter design methodology, comparisons are done between the two topologies considering numbers of normal and redundant submodules, different working conditions, rated voltages and power of the PET, switching frequencies and commercial devices. Theoretical analysis, simulation and experimental results showed that the 2 topologies has no significant difference in efficiency. Considering its advantages in redundancy in the PET, the boost and DAB is a preferable choice for submodules in ISOP DC PETs. |
