逆变器驱动电机系统共模电压抑制模型预测控制  

Model predictive control to suppress common mode voltage of inverter drive motor system

作　　者：黄辉先[1] 韩建超[1] 刘湘宁 李鑫伟 HUANG Hui-xian;HAN Jian-chao;LIU Xiang-ning;LI Xin-wei(College of Information Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105

出　　处：《电机与控制学报》2018年第9期84-90,共7页Electric Machines and Control

基　　金：湖南省教育厅重点资助项目(12A136)

摘　　要：针对传统三相电压源逆变器驱动电机系统存在较高共模电压的问题,提出了抑制共模电压的模型预测控制(SCMV-MPC)方法,只利用非零电压矢量来抑制共模电压同时控制负载电流。在SCMV-MPC方法中,每个周期内通过评价函数选出两个非零矢量,并且对两个矢量的作用时间进行优化配置,以达到负载电流和参考电流值之间误差最小的目的;而不像传统的调制方法在一个周期只选择一个包括零矢量在内的控制矢量。因此,与传统的模型预测控制方法相比,SCMV-MPC方法可以将共模电压限制在±V_(dc)/6的同时减小负载电流波动,使负载电流具有快速的瞬态响应和较好的纹波性能。仿真和实验结果验证了所提出的SCMV-MPC方法的有效性。Aiming at the higher common mode voltage in the PWM motor drive system othree-phase voltage source,a model predictive control method was proposed to suppress the commonmode voltage, which only uses the non-zero voltage vector to suppress the common mode voltage and con-trols the load current at tlie same time. In the SCMV - MPC metliod, two nthrough the evaluation function in each cycle. The acting time of these two vectors will be optimized to a-chieve the minimum eror between the load current and the reference current. Iditional modulation met!iod which only selects one control vector including the zero vector iTherefore, compared with the traditional model predictive control method, SCMV - MPC method can limitthe common mode voltage to ± . c/6 and reduce the load current fluctuatioenable the load current to have a fast transient response and the satisfactory ripple performance. T h e sim-ulation and experimental results verify effectivenes of t!ie proposed SCMV - MPC method.

关 键 词：电压源逆变器 电机驱动 共模电压 电流控制 模型预测控制 

分 类 号：TM921[电气工程—电力电子与电力传动] TP29[自动化与计算机技术—检测技术与自动化装置]