全超导托卡马克核聚变发电装置快控电源的干扰抑制离散积分滑模电流控制  

Disturbance Suppression Discrete Integral Sliding Mode Current Control of Experimental Advanced Superconducting Tokamak Fast Control Power Supply

作　　者：黄海宏[1] 陈昭 王海欣[1] Huang Haihong;Chen Zhao;Wang Haixin(School of Electrical Engineering and Automation Hefei University of Technology,Hefei 230009 China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电工技术学报》2024年第10期3141-3151,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金区域创新发展联合基金资助项目(U22A20225)。

摘　　要：全超导托卡马克核聚变发电装置(EAST)快控电源的首要性能指标是快速跟踪参考信号,以输出电流实现负载线圈的励磁,对等离子体的垂直位移进行反馈控制。EAST快控电源负载线圈受装置内部部件和真空内等离子体的影响,线圈感值会出现小范围内慢时变波动以及线圈上存在互感电动势干扰,传统比例-积分(PI)控制方法在电流跟踪控制过程中存在不足。为了实现干扰的抑制和应对负载波动,提出一种带干扰抑制的离散积分滑模控制方法,根据系统状态方程设计离散积分滑模控制器,结合滑模干扰观测器实现集总干扰的观测,对集总干扰进行前馈补偿控制。为了抑制抖振和加快收敛速度,设计一种新型平滑饱和函数和增益自适应观测器,根据观测电流误差和跟踪电流误差自适应调整观测器增益。对比传统PI控制,仿真和实验验证了所提控制方法具有更加优良的电流跟踪特性,在输出电流超调更小的情况下动态响应更快,能够有效地抑制负载侧扰动,具有良好的鲁棒性。The primary performance of the fast control power supply for the experimental advanced superconducting Tokamak(EAST)is to quickly track the reference signal,realize the excitation of the load coil,and feedback control the vertical displacement of the plasma.The load coil of the EAST fast control power supply is affected by the internal components and the plasma in the vacuum.The coil inductance will fluctuate slowly in a small range,and there will be mutual inductance electromotive force interference on the coil.The traditional proportional-integral(PI)control has shortcomings in the current tracking control process.Sliding mode control has been widely used due to its advantages of simple control and strong robustness.To realize disturbance suppression and cope with load fluctuation,a discrete integral sliding mode control method with disturbance suppression is proposed based on the system state equation of the EAST fast control power supply.The control disturbance caused by inductance fluctuation and mutual inductance electromotive force on the load side is equivalent to lumped disturbance.The observation of lumped disturbance is realized using a sliding mode disturbance observer.In order to compensate for the lumped disturbance on the load side,a discrete integral sliding mode controller and a sliding mode disturbance observer are combined to perform feedforward compensation control.A variable gain observer structure is designed based on the observed current error and the tracking current error to balance the chattering magnitude and convergence speed in the sliding mode control process.Thus,the gain is adaptively adjusted with the observed current error.According to the observer error stability conditions,the adaptive adjustment range of the observer gain is determined.The stability of the designed sliding mode controller is analyzed to ensure sufficient convergence of the sliding mode controller.A novel smooth saturation function is designed to address insufficient chattering suppression of traditional symbol

关 键 词：EAST快控电源 离散积分 滑模控制 滑模干扰 观测器前馈补偿 

分 类 号：TM91[电气工程—电力电子与电力传动]