Performance evaluation of model predictive direct torque control
Performance evaluation of model predictive direct torque control
复制标题
模型预测直接扭矩控制的性能评估
DOI：
10.1109/pesc.2008.4592718
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Manfred Morari
中科院分区：
文献类型：
--
作者：
J. Kley;G. Papafotiou;Kostas G. Papadopoulos;Patrick Bohren;Manfred Morari
本文提出了一种模型预测直接转矩控制(MPDTC)算法，用于控制由三电平直流环节逆变器组成的三相感应电机驱动系统。与标准的直接转矩控制(DTC)方法相比，MPDTC方法在降低逆变器开关频率的同时，将电机转矩、定子磁链和逆变器中性点电势保持在给定的滞环范围内。在这里，MPDTC算法增加了适当的不可行退出策略，当电压矢量选择问题不允许解决时，该策略被激活，并在其整个运行范围内提供驱动器的稳定和可靠的运行。将该算法嵌入ABB公司ACS6000中压驱动器的控制软件环境中，给出了实验结果，验证了MPDTC在平均逆变器开关频率降低方面的优势。更具体地说，与传统的直接转矩控制相比，所提出的MPDTC方案使逆变器的开关频率(在整个运行范围内)平均降低了16.5%，但对于特定的运行条件，其降低幅度高达37.4%。
This paper presents the implementation of a previously proposed model predictive direct torque control (MPDTC) algorithm for the control of three-phase induction motor drives comprising a three-level DC-link inverter. The MPDTC scheme is designed to keep the motor torque and stator flux and the inverter neutral point potential within given hysteresis bounds while reducing the switching frequency of the inverter, in comparison with the standard direct torque control (DTC) method. Here, the MPDTC algorithm is augmented with a suitable infeasibility exit strategy which is activated when the voltage vector selection problem does not admit a solution, and provides a stable and reliable operation of the drive throughout its operating range. The algorithm is embedded in the control software environment of ABB's ACS6000 medium voltage drive, and experimental results are provided which verify the advantageous features of MPDTC in terms of average inverter switching frequency reduction. More specifically, compared to classic DTC, the proposed MPDTC scheme achieves an average (over the whole operating range) reduction of the inverter switching frequency of 16.5%, but for specific operating conditions the reduction is as much as 37.4%.