Smooth Switching Strategy for Flexible Multi-state Switches Based on Linear Active Disturbance Rejection Control
刘一琦 1孙明哲 1胡存刚 2李振杰 1班明飞1
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作者信息
1. 东北林业大学 计算机与控制工程学院,黑龙江省 哈尔滨市 150000
2. 安徽大学 电气工程与自动化学院,安徽省 合肥市 230000
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摘要
为实现多端口柔性多状态开关(flexible multi-state switches,FMSS)在所连馈线发生故障时的平滑切换,该文提出一种基于线性自抗扰控制(linear active disturbance rejection control,LADRC)的平滑切换策略,使用 LADRC代替比例积分(proportional integral,PI)控制器的直流电压外环并设计解耦状态观测器以便控制器参数调节,引入内环电流指令值反馈以减小其在控制模式切换时的变化幅度,实现FMSS控制模式的平滑切换.通过MATLAB/Simulink仿真,验证了馈线故障出现在PQ或UdcQ控制端口的连接处时,采用基于LADRC的平滑切换策略均可显著减小FMSS的直流电压偏移率,使端口有功功率过渡平滑,迅速恢复稳定,更好地实现了多端口 FMSS控制模式的平滑切换.
Abstract
To realize the smooth switching of multi-port flexible multi-state switches(FMSS)when the feeder fails,this paper proposes a smooth switching strategy based on the linear active disturbance rejection control(LADRC).The LADRC is adopted to replace the PI controller of the DC voltage outer-loop,and the decoupled extended state observer is designed to adjust the controller parameters.The inner-loop given current value feedback is introduced to cut down the variation when the control mode converts,realizing the smooth switching of the FMSS control mode.The MATLAB/Simulink simulation results verify that the proposed method is able to significantly reduce the DC voltage variation,realize a smooth active power transition,and quickly restore stability when the faults occur at the joints of PQ or UdcQ control ports in the process of the FMSS control mode switching.Briefly,the smooth switching of multi-port FMSS control mode is improved.
关键词
柔性配电网/线性自抗扰控制/柔性多状态开关/馈线故障/平滑切换
Key words
flexible distribution network/linear active disturbance rejection control/flexible multi-state switches/feeder fault/smooth switching
维普
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