An Electric Power Regulator for Impact Power Suppression and Line Loss Reduction in Shore Power System

The widespread utilization of marine equipment, especially the floating crane, poses complex challenges for power regulation in shore power system. An electric power regulator, along with a power compensation strategy based on the scenario categorization, is presented in this article to address the issues of impact power and line loss in shore power system. The regulator’s topology is first introduced, and subsequently the operational scenarios are divided according to the load power and state of charge of the battery. Then, the adjustable line loss optimization model is established, and the interval of the power compensation for loss reduction is obtained through solving the model. Furthermore, considering the demand of impact power suppression and limitations of the interval and regulator capacity, the power compensation reference of the regulator under corresponding scenarios is determined. Finally, a low-power experimental prototype is set up in the laboratory. The experimental results show that the rate of power impact suppression reaches 90%, the power factor increases by 18.07%, and the line loss decreases by 17.17%.