一拍滞后对三相异步电机模型预测电流控制的影响及补偿方法

doi:10.19595/j.cnki.1000-6753.tces.171281

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摘要模型预测控制概念清晰且易于处理包含约束条件的多变量控制问题,已经成为电力传动领域研究的热点。该文利用系统闭环模型及闭环极点分布等方法,研究了一拍滞后对三相异步电机连续控制集模型预测电流控制（CCS-MPCC）的影响,并从预测的动、静态特性以及电机参数敏感性等方面比较了四种基于模型的滞后补偿方法。首先,介绍了三相异步电机CCS-MPCC的基本原理;其次,利用系统闭环模型分析了一拍滞后对CCS-MPCC的影响,并给出了四种基于模型的预测补偿方法;最后,通过仿真和实验验证了一拍滞后对模型预测控制的影响,并比较了四种滞后补偿方法的特性。实验结果表明,改进降阶观测器具有良好的一拍滞后补偿特性,可以有效降低电流控制的超调、振荡以及纹波,提高CCS-MPCC的动态响应速度和控制稳定性。

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	王治国
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关键词 ：模型预测控制, 电流控制, 三相异步电机, 一拍滞后, 滞后补偿

Abstract：Recently, model predictive control (MPC) has been a hot research topic in electric drives for its advantages of clear concepts and easy consideration of multivariable case with constraints. In this paper, the effect of one-step delay on continuous control set model predictive current control (CCS-MPCC) for three-phase induction machine is investigated by the closed-loop system and the distribution of the closed-loop poles. Four model-based delay compensation methods are compared from the static and dynamic characteristics of the prediction, and the sensitivity to the motor parameters. Firstly, the basic principle of CCS-MPCC for three-phase induction machine is introduced. Then, the effect of one-step delay on CCS-MPCC is analyzed by using closed-loop model of the system, and four model-based prediction compensation methods are presented. Finally, the effect of one-step delay on CCS-MPCC characteristics is verified by simulation and experiment, and the characteristics of four compensation methods are compared. The experimental results show that the improved reduced order observer can effectively reduce the current overshoot, oscillation and current ripple, improve dynamic response speed and control stability of CCS-MPCC.

Key words： Model predictive control current control three phase induction machine one-step delay delay compensation

收稿日期: 2017-09-11 出版日期: 2018-11-12

PACS:	TM343
	TP272

作者简介: 王治国男,1977年生,博士研究生,讲师,研究方向为电力电子与电气传动。E-mail：wzg13@mails.tsinghua.edu.cn（通信作者）郑泽东男,1980 年生,副教授,研究方向为高压大容量多电平变换器、高精度电机控制以及电网储能技术等。E-mail：zzd@mail.tsinghua.edu.cn

引用本文:

王治国, 郑泽东, 李永东, 彭忠, 邓智昌. 一拍滞后对三相异步电机模型预测电流控制的影响及补偿方法[J]. 电工技术学报, 2018, 33(21): 4928-4940. Wang Zhiguo, Zheng Zedong, Li Yongdong, Peng Zhong, Deng Zhichang. The Effect of One-Step Delay on the Model Predictive Current Control for Three-Phase Induction Machine and the Delay Compensation Methods. Transactions of China Electrotechnical Society, 2018, 33(21): 4928-4940.

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