基于功率逐级切换控制的内河船舶负荷转供策略

针对我国内河流域港口岸电的船舶负荷转供过程的研究,为抑制并网后直接切断船侧柴电系统引起的逆功率与负荷波动问题,提出一种基于船侧负荷由船电转供至岸电的功率逐级切换控制方法。通过分析岸电对船侧负荷转供过程中的功率波动现象,给出基于功率超调和动态响应时间为指标的逐级切换的条件,以船侧负荷的电能质量指标为标准,通过对船侧同步电机的输出功率进行逐级调速控制,以降低功率波动以及频率偏移对负荷的负面影响,提高供电质量。通过SIMULINK平台搭建岸电系统模型进行仿真,对这一方法的仿真结果表明了所提出的策略的正确性和有效性,能够实现岸船两侧电力系统的并网后负荷的平稳过渡。

Inland river ship-load transfer strategy based on step-by-step power control

In view of the research on the process of ship load transfer in the shore power of the inland river basins, in order to suppress the reverse power and load fluctuations caused by directly cutting off the ship''s diesel power system after grid connection, a step-by-step power switching control solution based on load transfer from ship power to shore power is proposed. By analyzing the power fluctuation phenomenon in the process of shore power load transfer, the conditions of step-by-step switching based on power overshoot and dynamic response time are given. Based on the power quality index of the ship''s side load, the output power of the ship''s synchronous motor is under step-by-step control to reduce the negative impact of power fluctuation and load frequency offset, also improve the quality of power supply. Build a shore power simulation platform by Simulink to study the advantages and disadvantages of power step-by-step switching control and existing strategies. The simulation results show that the proposed strategy is correct and effective. It can achieve the smooth transition of load after grid connection.