Comparison of Star and String Offshore DC Collector Grid Topologies on the Aspect of Stability—An Impedance Approach

Offshore Direct Current (DC) collector grids are a promising technology for decreasing the installation and operation costs of offshore wind parks. Nevertheless, stability properties hence design such DC is not common or standardised. Hence, this paper describes an attempt to fill these gaps by analysing two different types grids—star string—by considering identical operating conditions. The approach follows non-parametric formulation impedance based Nyquist Stability Criterion. hyperbolic Π equivalent telegraph equation adopted modelling submarine cable due high capacitance that distributed thus conventional 50 Hz Π-model sufficient anymore. Furthermore, shows how integrate complex dynamics turbines into overall assessment through building algorithm. Finally, it shown stabilise means active control parameter changes has been observed star configuration more favourable on account controllability.