The LVDC source (input voltage) of each converter is 4.04 kV, while the voltage drops across cables are responsible for different voltages at the output terminal of the wind turbines.
According to discrete time-domain modelling approach, the procedure is only valid when the variations in MVDC grid voltage [v.sub.o] (t) (output terminal voltage) and LVDC voltage [v.sub.g] (t) (input terminal voltage) in the event (switching) are relatively small than their initial and final values [42].
The procedure is only valid when the variation in output voltage [v.sub.o](i) (MVDC grid voltage) or input voltage [v.sub.g](i) (
LVDC voltage) in the event (switching) is relatively smaller than its initial and final values [10].
Peltoniemi, "Protection scheme for an LVDC distribution system," in Proceeding of the 20th International Conference and Exhibition on Electricity Distribution (ICEED '09), pp.
Partanen, "LVDC distribution system protection--solutions, implementation and measurements," in Proceeding of the 13th European Conference on Power Electronics and Applications (ECPEA '09), pp.
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LVDC. The company carries brands including Lorts Manufacturing, Artitalia and Pearson Company,