基于飞轮储能技术的船舶区域配电系统冲击负荷供能策略

Impulse Load Energy Supply Strategy of Ship Regional Distribution Power System Based on Flywheel Energy Storage Technology

针对船舶区域电力系统中冲击负荷启停时引起的频率大幅度波动故障,采用飞轮储能系统,实现对冲击负荷的功率补偿和对系统频率波动的抑制。当飞轮充电时,采用按转子磁链的矢量控制方法对飞轮驱动电机的转速进行控制,以减少充电时间和过程扰动。当冲击负荷启动引起船舶出现功率缺额和频率波动时,触发飞轮装置进入放电工作模式,配合柴油机组为冲击负荷供电。飞轮储能系统内部自带变频器,能实现交流-直流-交流的转换,达到为冲击负荷稳定供电的目的。采用MATLAB/Simulink平台搭建适用于船舶系统的飞轮储能充放电模型,仿真结果表明,该系统能紧急满足冲击负荷的电能供应需求,从而预防船舶电网出现频率大幅度波动故障和加快故障自愈。

Aiming at the frequency fluctuation caused by the start and stop of impact load in the regional power system of ships, the flywheel energy storage system is used to realize the power compensation of impact load and the suppression of system frequency fluctuation. During flywheel charging, the speed of flywheel drive motor is controlled by vector control method according to rotor flux linkage so as to reduce charging time and process disturbance. When the power shortage and frequency fluctuation of the ship are caused by the start-up of the impact load, the flywheel device is triggered to enter the discharge working mode and cooperate with the diesel unit to supply power to the impact load. The flywheel energy storage system has its own frequency converter, which can realize AC-DC-AC conversion and achieve the purpose of stable power supply for impact load. Using MATLAB/Simulink platform, a flywheel energy storage charging and discharging model suitable for the ship system is established. The simulation results show that the system can meet the power supply of the impact load urgently, thus preventing the frequency fluctuation of the ship’s power grid and speeding up the fault self-healing.