超级电容储能在船舶中压直流系统能量管理中的应用

Application of supercapacitor energy storage in energy management of ship medium voltage DC system

为使大功率脉冲负载能够安全地接入船舶中压直流系统,平滑需求脉冲功率,减小脉冲负载造成的母线电压巨幅振荡,提高能量利用率,在对双有源全桥变换器进行输入并联输出串联(InputParallel Output-Series,IPOS)模块化设计的基础上,针对船舶中压直流系统脉冲负载,建立超级电容储能系统.为防止超级电容出现过度充电及过度放电的现象,最大限度地利用其容量,提出最小值功率控制策略.应用MATLAB/Simulink对超级电容正常工作、过度充电和过度放电3种情况进行仿真.仿真结果表明:最小值功率控制策略能够明显减小大功率脉冲负载造成的母线电压巨幅振荡,对超级电容端电压最大值及最小值实现精确限制.

In order to make the high-power pulse load access the ship Medium Voltage DC （MVDC） system safely, smooth pulse power demand, reduce the huge bus voltage oscillation caused by pulse load, and increase energy utilization efficiency, based on an Input-Parallel Output-Series （IPOS） modular design for the dual active full-bridge converter, a supercapacitor energy storage system is established for the pulse load of the ship MVDC system. In order to prevent the over-charging and over-discharging phenomena of supercapacitors and maximize the use of their capacity, the minimum power control strategy is proposed. The three cases including normal operation, over-charging and over-discharging are simulated by MATLAB/Simulink. The simulation results show that： the minimum power control strategy can greatly reduce the huge bus voltage oscillation caused by high-power pulse load, and limit the maximum and minimum of the supercapacitor terminal voltage accurately.