Voltage Quality Study of Integrated Power System for All-Electric Vessels Using Dynamic Simulation Techniques

摘要

New trends of environmental and economical issues have motivated ship end users to pay more attention in producing affordable power solutions for future vessels. This movement has been recognized by the commercial shipbuilding industry and the U.S. Navy and the aspects of integrated Power System (IPS) are introduced into the planning and design of all-electric vessels to improve system utilization and operation. The IPS consists of an architecture and a set of generators which together supply power to ship service loads as well as electric propulsion systems. However, for reliable and efficient operations, an effective system performance study framework is important and essential. To ensure the operating performance of IPS in all-electric vessels under different navigating situations, a dynamic simulation technique based method is employed in this paper for analyzing voltage variations. The dynamic characteristics of EPS are modeled and simulated by the proposed method. To demonstrate the effectiveness of proposed method, a practical vessel IPS with 6110 kVA of generation capacity and two 2200 kW propulsion motors is selected for computer simulation. Test results have shown that with thorough simulations, the system performance with respect to transient and dynamic voltage qualities can be completely represented by the proposed method, which can assist engineers in determining proper system design or mitigation options.