Performance Analysis of Integrated Electric Propulsion System for Icebreakers under Wide Operating Conditions
The existing icebreaker power system mainly uses diesel-electric power,which is subject to large load disturbances,while special working conditions such as ice jamming are prone to unit overload and power loss from the grid.In order to improve the system performance and cut peaks,a comprehensive power flow model of the electric propulsion system with diesel-electric unit as the main body and coupled energy storage system is constructed with a heavy-duty polar research icebreaker as the research object.A three-level energy management strategy is proposed by using MATLAB/Simulink simulation for different operating conditions.The results show that compared with the short-time icebreaking condition where the diesel-electric unit operates stably,the long-time route condition triggers the start-stop and the fuel saving rate is as high as 6.06％,and the optimal payback year of the system is 8.07 years.The study elucidates the performance of the system under a variety of operating conditions,where the introduction of an energy storage system ensures the efficient operation of the diesel-electric unit under unknown conditions.
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维普
