李洪跃, 王锡淮, 肖健梅, 陈晨. 柴电混合电力推进船舶负载频率H鲁棒控制[J]. 中国舰船研究, 2017, 12(3): 120-127. DOI: 10.3969/j.issn.1673-3185.2017.03.017
引用本文: 李洪跃, 王锡淮, 肖健梅, 陈晨. 柴电混合电力推进船舶负载频率H鲁棒控制[J]. 中国舰船研究, 2017, 12(3): 120-127. DOI: 10.3969/j.issn.1673-3185.2017.03.017
LI Hongyue, WANG Xihuai, XIAO Jianmei, CHEN Chen. H robust control of load frequency in diesel-battery hybrid electric propulsion ship[J]. Chinese Journal of Ship Research, 2017, 12(3): 120-127. DOI: 10.3969/j.issn.1673-3185.2017.03.017
Citation: LI Hongyue, WANG Xihuai, XIAO Jianmei, CHEN Chen. H robust control of load frequency in diesel-battery hybrid electric propulsion ship[J]. Chinese Journal of Ship Research, 2017, 12(3): 120-127. DOI: 10.3969/j.issn.1673-3185.2017.03.017

柴电混合电力推进船舶负载频率H鲁棒控制

H robust control of load frequency in diesel-battery hybrid electric propulsion ship

  • 摘要:
      目的  风、浪及海流等多种随机不确定因素会引起船舶综合电力系统负载频率的波动。
      方法  采用电池补偿柴油发电机组输出功率与船舶需求功率之间的差值,对柴油发电机组进行二次调频控制,保证船舶电网功率平衡,抑制电网频率波动。建立综合电力推进系统频率控制状态空间模型,基于H混合灵敏度原理,选取合理的灵敏度与补灵敏加权函数设计鲁棒控制器,采用线性矩阵不等式(LMI)方法对设计的控制器进行求解并进行算例仿真。
      结果  系统幅频特性表明,设计的鲁棒控制器具有合理性,短时冲击信号作用下的性能表现满足指标要求。与传统PI控制器的对比结果表明,设计的鲁棒控制器能显著抑制随机扰动引起的电网负载频率波动,减小柴油发电机组与电池的功率变化,电池荷电状态(SOC)变化范围明显缩小,可提高船舶电力系统鲁棒稳定性与鲁棒性能。
      结论  该系统在各种工况下都能稳定运行并且使电网频率稳定,同时提高柴油发电机组燃油经济性,减小废气排放。

     

    Abstract: Considering the load frequency fluctuation in the shipboard integrated power system caused by such stochastic uncertainty as wind, wave and current, the battery is adopted here to compensate for the difference between diesel generator output power and ship demand power, and the secondary frequency control is used for the diesel generator to guarantee the power balance in the shipboard integrated power system and suppress the frequency fluctuation. The load frequency control problem is modeled as a state space equation, the robust controller is designed by selecting the appropriate sensitivity function and complementary sensitivity function based on the H mixed sensitivity principle, and the controller is solved by the linear matrix inequality(LMI)approach. The amplitude frequency characteristics denote the reasonability of the designed controller and the design requirement is satisfied by the impact of the impulse signal. The simulation results show that, compared with the classical PI controller, the controller designed by the H robust method can significantly suppress frequency fluctuation under stochastic uncertainty, and improve the power variation of the diesel generator, battery and state of charge(SOC). The robust stability and robust performance of the power system are also advanced.

     

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