| Abstract |
In this paper the suitability of three DC/DC converters
for a DC wind park grid is investigated from an energy
efficiency point of view. The three selected topologies are the
fullbridge converter, the single active bridge converter and the
series parallel resonant converter. The energy efficiency of the
three converter types are evaluated for the wide range of
operating conditions that occur in a wind park.
It was found that the resonant converter has the lowest losses
of the three types and the fullbridge converter was found to be
second best. Moreover, it is shown that the variable operating
conditions creates problems for all three converters, especially at
low power. The single active bridge converter is most affected
by the wide range of operation since it is forced to operate in
discontinuous conduction mode in all cases which generates high
losses. The resonant converter has low losses, but the peak voltage
at the transformer is up to twice the input voltage. |
