Hai Lan

Research on Ship Shaft Power Generation System Based on BDFG and its Grid-Connected Control Strategy

The technology of Ship Shaft Power Generation System (SSPGS) is an effective way to save energy, Compared to the traditional SSPGS, the shaft power generation systems based on BDFG has the advantages of smaller capacity of the inverter, lower capital operational costs and higher reliability. In order to utilize rationally the resources, the paper analyses the ship operating mode, and presents the control strategy when the system working at grid-connected mode. The proposed vector control method is developed on the power winding (PW) stator flux frame and can be used to control both the active and reactive power on the grid-connected mode. The generator model and the control system are developed in Matlab/Simulink. The results show that the control strategy has good dynamic performance when the ship speed and power are change.

Modeling and PSCAD Simulation Analysis on a Ship Power System

As the rise both of the ships tonnage and the level of electrification heightened, the capacity of the ship power station has also been increased. Therefore, more large-capacity vessels generating units are used to satisfy the needs of the power system in the ship. This paper, by using the PSCAD simulation software, a dynamic simulation model of ship power system is established based on model elements such as prime mover, generators, control device, motor and the related load, based on which the defined load operating process is studied, and the steady state and dynamic performance of the ship power system are obtained. In order to energy saving and make full use of solar energy, in the ship power system, a photovoltaic device is used, and its output DC power is converted into the ship system using three-phase AC power by a inverter. For such a power system, the influences of addition of large-scale energy storage and new power supply equipments on ship power system are analyzed.