全直流型船舶微电网多时间尺度综合能量管理

Multi time scale integrated energy management of full DC marine microgrid

为了解决船舶微网在短期不同工况切换时功率波动大和长期运行经济性问题,采用多时间尺度分层控制的综合能量管理策略,在考虑船舶微网运行、负荷需求以及系统运行成本三者之间关系的基础上,对船舶微网系统进行了两层调控,其中针对短期运行下的负荷波动,采用基于规则的能量管理策略,通过对比所搭建的模型在不同模式以及不同运行工况下的仿真,结果表明当负荷处于短期波动时采用该策略能够在平抑功率波动的同时有效提高电能质量;长期运行下考虑可时移负荷对船舶运行经济性的影响,提出改进型的乌鸦搜索算法对燃料和储能电池总运行成本进行优化,通过算例分析表明:该算法考虑负荷时移性,不仅起到了削峰填谷的作用,而且相较于传统的乌鸦搜索算法经济性提高了4.4%。

In order to solve the problems of large power fluctuations and long-term operational economy in the switching of ship microgrids under different operating conditions in the short term,a comprehensive energy management strategy with multiple time scales and hierarchical control was adopted.Based on the consideration of the relationship between ship microgrid operation,load demand,and system operating costs,a two-layer regulation was carried out on the ship microgrid system.Among them,a rule-based energy management strategy was adopted for short-term load fluctuations.By comparing the simulation results of the built simulation model under different modes and operating conditions,it shows that this strategy can effectively suppress power fluctuations while improving power quality when the load is in short-term fluctuations;Considering the impact of time-varying load on the economic efficiency of ship operation in long-term operation,an improved crow search algorithm was proposed to optimize the total operating cost of fuel and energy storage batteries.Through example analysis,it is shown that considering the time-varying load not only plays a role in peak shaving and valley filling,but also improves the economic efficiency by 4.4%compared with traditional crow search algorithms.