PROJECT TITLE :

Medium-voltage DC/DC converter for offshore wind collection grid

ABSTRACT:

A unique modular DC/DC converter with input-series-input-parallel output-series association to understand a DC collection power network for large-scale wind farms is presented. The proposed topology uses interconnection of multiple modular cells with low rated voltage and power to enable operation with high voltage at the input and output. Low rated power of individual modules in the proposed DC/DC converter permits the use of a high-frequency ac link, ensuing in an exceedingly significant reduction in transformer size and weight, that makes deployment of DC collection networks in offshore wind farm applications more feasible and effective. As well, a sturdy management scheme is developed to confirm power sharing between sensible modules with parameter mismatch and during transient conditions. Tiny- and massive-signal analyses are performed so as to deduce the control structure for the converter input and output stages. Simulation and experimental results demonstrate and validate the proposed converter and associated control theme.