光伏微电网直流母线电压线性自抗扰控制策略  

Linear Active Disturbance Rejection Control Strategy of DC Bus Voltage in Photovoltaic Microgrid

作　　者：洪帆 祝龙记[1] HONG Fan;ZHU Longji(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电工技术》2025年第2期32-36,共5页Electric Engineering

摘　　要：针对光伏直流微电网并网运行中母线电压出现较大波动的问题,提出一种基于线性自抗扰的直流母线电容电流前馈控制策略。该控制策略在以线性自抗扰电压外环控制器调节母线电压的基础上,无需额外增加传感器设备,利用线性扩张状态观测器的观测量构建出母线电容电流观测值,将其前馈经稳态阈值判断环节后作为有功电流内环的参考值,进而控制双向变换器与大电网进行功率交换,以此来有效抑制较大的母线电压波动。最后,仿真验证了所提控制策略的有效性。Aiming at the problem of large bus voltage fluctuations in the grid-connected operation of photovoltaic DC microgrid,a DC bus capacitance current feedforward control strategy based on linear auto-disturbance rejection was proposed.Based on the regulation of bus voltage by the linear auto-disturbance rejection voltage outer loop controller,the control strategy does not need to add additional sensor equipment,and uses the observation of linear expansion state observer to construct the bus capacitance current observation value.Then,the bus capacitance current observation value is fed through the steady-state threshold judgment link as the reference value of the active current inner loop,and then the bi-directional converter is controlled to exchange power with the large power grid,so as to effectively suppress large bus voltage fluctuations.Finally,the effectiveness of the proposed control strategy was verified by simulation.

关 键 词：线性自抗扰 母线电压 电容电流 前馈控制 

分 类 号：TM76[电气工程—电力系统及自动化]