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基于模型补偿的逆变器交流电压自抗扰控制
引用本文:霍思敏,徐宇新,黄勇,李武龙,聂静.基于模型补偿的逆变器交流电压自抗扰控制[J].电气传动,2021,51(2):22-27.
作者姓名:霍思敏  徐宇新  黄勇  李武龙  聂静
作者单位:国网湖南省电力有限公司,湖南 长沙 410007;北京中恒博瑞数字电力科技有限公司,北京 100085;国网重庆市电力公司,重庆 400014
摘    要:三相逆变器系统是一个非线性、强耦合、负载扰动剧烈的系统,传统基于PI调节器的双环控制效果不尽人意。自抗扰控制(ADRC)将上述影响系统控制的不利因素视为总扰动,予以估计和动态补偿,然后施以合适误差反馈律,以获取理想的控制性能。针对三相逆变器交流电压控制问题,考虑到工程实用性,以交流电压及其一阶导数为状态变量设计二阶线性自抗扰控制器,并结合被控对象LC滤波器电感电流可测的特点,引入模型补偿项,以降低扩张状态观测器扰动观测压力,进一步提高自抗扰控制系统的跟踪精度。对传统自抗扰控制、模型补偿自抗扰控制和电压电流双环PI控制进行了对比实验,结果证明了所提策略在跟踪性能及抗扰性能方面的优势。

关 键 词:三相逆变器  自抗扰控制  模型补偿  扩张状态观测器

Active Disturbance Rejection Controller Based Model Compensation for AC Voltage Control of Inverter
HUO Simin,XU Yuxin,HUANG Yong,LI Wulong,NIE Jing.Active Disturbance Rejection Controller Based Model Compensation for AC Voltage Control of Inverter[J].Electric Drive,2021,51(2):22-27.
Authors:HUO Simin  XU Yuxin  HUANG Yong  LI Wulong  NIE Jing
Affiliation:(State Grid Hunan Electric Power Company,Changsha 410004,Hunan,China;Beijing Joinbright Digital Electric Technology Co.,Ltd.,Beijing 100085,China;State Grid Chongqing Electric Power Company,Chongqing 400014,China)
Abstract:The three-phase inverter system is characterized by non-linear,strong coupling and severe load disturbance,where performance of the PI regulator based double-loop control may be unsatisfactory.As for active disturbance rejection control(ADRC),the above factors that have effects on system control are regarded as total disturbance,which will be estimated and compensated dynamics.Then appropriate error feedback law is applied to obtain expected control performance.Aiming at the problem of voltage control of three-phase inverters,a secondorder linear ADRC controller with AC voltage and its differential as state variables was designed.Combining with the measurable inductance current of the LC filter,a model compensation term was introduced to reduce the disturbance observation pressure of the extended state observer and further improve the tracking accuracy of the ADRC system.The contrast experiment of conventional ADRC,ADRC with model compensation and PI based double-loop control verified the advantages of the proposed strategy in tracking performance and disturbance rejection capability.
Keywords:three phase inverter  active disturbance rejection contro(l ADRC)  model compensation  extended state observer
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