摘要
为解决LLC谐振变换器采用传统PID控制时抑制负载冲击能力差的问题,提出采用金豺优化算法(golden jackal optimization,GJO)的改进线性自抗扰控制方法。该方法基于状态空间表达式,结合降阶模型中的参数信息,改进扩张状态观测器的系数矩阵。利用频域拟合的方法获得线性自抗扰控制器参数初值,避免了繁复的人工调参过程。使用GJO算法对线性自抗扰控制器参数寻优,进一步改善控制器性能。实验结果表明,相较于PSO-PID控制器,GJO-MLADRC控制器有效提高了LLC谐振变换器在系统扰动较大的情况下的动态性能,在负载突增、突降2种工况下,调节时间分别缩短了1.5、1.0 ms,输出电压最大波动量分别减小0.10、0.05 V,改进后的LADRC控制策略有效地抑制了恒压模式下负载波动对输出电压的扰动。
LLC resonant converter has poor ability to suppress the load impact when the traditional PID control is adopted.To address the issue,this paper proposes an improved linear active disturbance rejection control method based on golden jackal optimization algorithm.The method improves the coefficient matrix of the extended state observer based on the state space expression with the integrated parameter information of the reduced order model.The frequency domain fitting method is employed to obtain the initial parameters of the linear active disturbance rejection controller,avoiding the complicated manual parameter adjustment process.The golden jackal optimization algorithm is employed to optimize the parameters of the linear active disturbance rejection controller to further improve the performance of the controller.Our experimental results show compared with the PSO-PID controller,the GJO-MLADRC controller effectively addresses the poor dynamic performance of the LLC resonant converter under the condition of large system disturbance.On condition of a sudden load increase or decrease,the adjustment time is cut down by 1.5 ms and 1ms respectively.The maximum wave momentum of the output voltage is reduced by 0.1 V and 0.05 V respectively.The improved LADRC control strategy effectively suppresses the disturbance of the output voltage caused by load fluctuations in the constant voltage mode.
作者
吴艳娟
王宏森
王云亮
WU Yanjuan;WANG Hongsen;WANG Yunliang(School of Electrical Engineering and Automation,Tianjin University of Technology,Tianjin 300384,China;Tianjin Key Laboratory of Complex System Control Theory and Application,Tianjin 300384,China;Tianjin Key Laboratory of New Energy Power Conversion,Transmissionand Intelligent Control,Tianjin 300384,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2024年第4期266-274,共9页
Journal of Chongqing University of Technology：Natural Science
基金
天津市科技计划项目(18ZXYENC00100,22ZYCGSN00190)。
关键词
LLC谐振变换器
自抗扰控制
动态性能
金豺优化算法
LLC resonant converter
active rejection control
dynamic performance
golden jackal optimization algorithm
