电力工程技术2026，Vol.45Issue(4)：84-93,10.DOI:10.12158/j.2096-3203.2026.04.009
三相PWM整流器离散模型参考自适应控制
Discrete-time model reference adaptive control for three-phase PWM rectifiers
摘要
Abstract
Three-phase pulse width modulation(PWM)rectifiers are essential power conversion devices in AC microgrids.However,DC load disturbances in the microgrid are unknown and filter capacitor parameters are imprecise,which will directly affect the control performance of the rectifiers.Therefore,a discrete model reference adaptive control(MRAC)method for three-phase PWM rectifiers is proposed to realize the high-performance operation of three-phase PWM rectifiers under the coexistence of DC load disturbances and unknown filter capacitance parameters.Firstly,a discrete model of the three-phase PWM rectifier is established.Secondly,based on the model reference adaptive control theory,a voltage-loop discrete adaptive controller and an adaptive law for load and filter capacitance parameters are designed respectively.The adaptive law is used to adjust the load and filter capacitance parameters in the adaptive controller in real time,which not only effectively improves the tracking accuracy of the output voltage of the three-phase PWM rectifier,but also significantly enhances its robustness against load disturbances and parameter variations of the filter capacitor.Meanwhile,the stability and convergence of the proposed controller are verified by combining the discrete Lyapunov stability theory.Finally,simulation and experimental results show that the designed adaptive law can accurately estimate the load and filter capacitance parameters.Compared with the double-loop proportion integral(PI)control method,the proposed control method exhibits shorter load regulation time,smaller voltage sags and lower grid-side current total harmonic distortion(THD),along with strong adaptability to load disturbances and high robustness against filter capacitance parameter uncertainties.关键词
三相脉冲宽度调制(PWM)整流器/离散控制/模型参考自适应控制(MRAC)/参数摄动/负载扰动/鲁棒性Key words
three-phase pulse width modulation(PWM)rectifiers/discrete-time control/model reference adaptive control(MRAC)/parameter perturbation/load disturbance/robustness分类
信息技术与安全科学引用本文复制引用
祁嘉言,侯波,高云广..三相PWM整流器离散模型参考自适应控制[J].电力工程技术,2026,45(4):84-93,10.基金项目
山西省自然科学基金资助项目(202203021211201)本文得到陕西理工大学人才启动项目(SLGRCQD2122)资助,谨此致谢! （202203021211201）
