混合储能在舰船中压直流电力系统中的管理策略

Hybrid Energy Storage Management Strategy in Medium-Voltage DC Power System of Warship

由于舰船中压直流电力(MVDC)系统存在脉冲性负载,造成母线电压大幅跌宕,而实际舰船需要保持母线电压的波动在允许范围内。同时,为了优化该系统的能源使用效率,采用混合能量存储系统(HESS),成为全电力舰船解决这些问题的有效方法。分别设计了PI控制器和模糊逻辑控制器,预测HESS的参考功率,以满足负载功率需求,对两种方法进行了分析比较。并对舰船处于不同载荷状态下的模糊能量管理策略进行了仿真分析研究。应用Matlab/Simulink建立了MVDC电力系统、HESS、推进负载、恒功率负载和脉冲负载模型进行仿真分析。仿真结果表明:模糊逻辑控制器优于PI控制器,同时基于模糊逻辑控制器能量管理策略能有效地管理舰船不同负荷功率需求,提升系统能源利用效率和稳定性。

Due to the impulsive load on the medium-voltage direct-current （MVDC） power sys-tem of a warship, the bus voltage is greatly increased. However,the warship actually needs to keep the fluctuation of the bus voltage within an allowable range ？ and at the same time ？ the energy effi-ciency needs to be optimized in the MVDC. Therefore ？ a hybrid energy storage system （HESS） has become an effective method to solve these problems in an all-electric warship. In the present paper, the PI controller and the fuzzy logic controller are designed to predict the HESS to meet the load power requirement. The two methods are analyzed and compared. The sim-ulations and analyses of the fuzzy energy management strategy for warships under different loadstates are carried out. The MVDC power system,HESS system,propulsion load,constant power load and pulse load models are buitt in MATLAB/SIMULINK. The simulation results show thatthe fuzzy logic controller is superior to the PI controller. Simultaneously,the energy management strategy based on the fuzzy logic controller can effectively manage the requirements of the warships under different load powers as well as improve the energy efficiency and stability of the system.