Grounding and Charging Strategy for Ships during Cold Ironing Operation

In order to minimize the pollution that ships generate at ports, ships can be connected to the utility grid during charging, also known as shore-to-ship connection or cold ironing operation. The pollution can also be remarkably reduced if the ships are full-electric or hybrid. With the utilization of a common DC bus, several ships can be charged simultaneously. However, due to the common DC bus, the ships are not galvanic isolated from each other such that leakage current can occur among the ships and the quay when the current leaks to the ground during a fault. Hence, this paper proposes a complete charging and grounding strategy, which will provide galvanic isolation between the ships and…