基于全阶扰动观测器的三相VIENNA整流器控制  

Three-phasee VIENNA Rectifier Control Based on Full-order Disturbance Observer

作　　者：王家升 魏海峰[1] 张懿[1] WANG Jia-sheng;WEI Hai-feng;ZHANG Yi(Jiangsu University of Science and Technology,Zhenjiang 212000,China)

机构地区：[1]江苏科技大学,自动化学院,江苏镇江212000

出　　处：《电力电子技术》2023年第7期28-31,共4页Power Electronics

基　　金：国家自然科学基金(51977101);江苏省重点研发计划产业前瞻性与共性关键技术重点项目(BE2018007)。

摘　　要：以三相VIENNA整流器为对象,针对传统PI控制系统长时间运行存在的电感变化等问题,提出一种基于全阶扰动状态观测器的三相VIENNA整流器控制策略。首先,将系统电感参数扰动引入VIENNA整流器,构建全阶扰动状态观测器来实时观测系统扰动。其次,离散化观测器,通过极点配置设计变增益反馈系数,在保证稳定性的前提下,提高观测器收敛速度。最后,在PI控制算法中,利用观测器估算扰动电压,补偿由电感变化引起的误差。仿真和实验结果表明,所提控制策略,在电感变化时,能够较好地观测系统扰动,避免参数扰动造成系统振荡,保证VIENNA整流器可靠稳定运行。Taking three-phase VIENNA rectifier as the object,a three-phase VIENNA rectifier control strategy is pro-posed based on full-order disturbance state observer,aiming at the problems of inductance change existing in tradi-tional PI control system running for a long time.Firstly,the system inductance parameter disturbance is introduced into the VIENNA rectifier,and a full-order disturbance state observer is constructed to observe the system disturbance in real time.Secondly,the observer is discretized,and the variable-gain feedback coefficient is designed by pole configu-ration which improves the convergence speed of the observer under the premise of ensuring stability.Finally,in PI control algorithm,the observer is used to estimate the disturbance voltage compensating the error caused by the in-ductance change.The simulation and experimental results show that the proposed control strategy can better observe the system disturbance when the inductance is changed,avoid the system oscillation caused by the parameter distur-bance and ensure the reliable and stable operation of the VIENNA rectifier.

关 键 词：整流器 全阶扰动状态观测器 收敛速度 

分 类 号：TM461[电气工程—电器]