南方电网技术2024，Vol.18Issue(9)：11-22,12.DOI:10.13648/j.cnki.issn1674-0629.2024.09.002
非理想条件下基于SAADR-PI的MMC型电力电子变压器CCS-MPC控制策略
CCS-MPC Control Strategy for MMC Power Electronic Transformers Based on SAADR-PI Under Non-Ideal Conditions
摘要
Abstract
The power electronic transformer(PET)based on modular multilevel converter(MMC)is prone to failures and disturbances under non-ideal operating conditions,which seriously affects the system power quality.Aiming at the poor dynamic and steady state performance of traditional control methods under non-ideal operating conditions,a continuous control set model predic-tive control strategy based on self-adaptive auto-disturbance rejection proportional integral controller is proposed in the MMC-PET rectifier stage.Firstly,a self-adaptive auto-disturbance rejection proportional integral controller is designed to solve the problems of poor signal tracking and disturbance rejection in the voltage outer loop.Secondly,the continuous control set model predictive control method is used in the current inner loop to improve the response speed and steady state performance of the system,and an improved carrier phase-shift modulation strategy is introduced to solve the problem of bridge arm current distortion.Finally,the MMC-PET system is compared by simulation and experiment under non-ideal operating conditions,such as sudden change of loads on the grid side,unbalanced grid voltage,and load input at the output stage,to verify the superiority of the proposed control strategy.关键词
电力电子变压器/模块化多电平换流器/自适应自抗扰比例积分控制/连续控制集模型预测控制/双闭环控制Key words
power electronic transformer/modular multilevel converter/self-adaptive auto-disturbance rejection proportional integral control/predictive control of continuous control set model/dual closed loop control分类
动力与电气工程引用本文复制引用
杨浩,周建萍,黄烈钢,周靖涛..非理想条件下基于SAADR-PI的MMC型电力电子变压器CCS-MPC控制策略[J].南方电网技术,2024,18(9):11-22,12.基金项目
国家自然科学基金资助项目(61905139).Supported by the National Natural Science Foundation of China(61905139). （61905139）
