摘要
针对传统空间矢量脉宽调制(SVPWM)逆变器输出电流纹波较大的问题,提出一种预测电流型三相逆变器的SVPWM控制策略,建立了三相SVPWM逆变器在αβ坐标系下的数学模型。通过对第k周期时逆变器输出三相电流电压数据实时采集,在线预测出下一个采样周期电流电压并根据预测算法结合空间矢量控制策略得到相应的目标电压矢量,在第k+1周期时就可以合成最优的SVPWM控制信号驱动IGBT功率器件减少逆变器输出电流纹波。最后利用Matlab/Simulink搭建了预测电流型三相逆变器的SVPWM控制的仿真模型。仿真结果表明采用预测电流型SVPWM控制策略能有效减少逆变器输出三相电流总谐波,证明了该控制策略的正确性和可行性。
To solve the problem that the output current ripple of the traditional space vector pulse width modulation(SVPWM),a SVPWM control strategy of three-phase inverter is proposed,and a three-phase SVPWM inverter is established in three-phase to the mathematical model of the two-phase stationary coordinate system.The real-time acquisition of the three-phase current is output by the inverter at the kth cycle.The next sampling period is predicted by the current measurement and the corresponding target voltage vector is obtained according to the prediction algorithm combined with the space vector control strategy.At the k+1 th cycle it is possible to synthesize the optimal SVPWM control signal to drive the IGBT power device and reduce the inverter output current ripple.Finally,a simulation model of SVPWM for predicting current-mode three-phase inverter is built by using Matlab/Simulink.The simulation results show that the SVPWM control strategy can effectively reduce the total harmonic of the three-phase current output of the inverter,and prove the correctness and feasibility of the control strategy.
作者
周朝霞
伍诗雨
张亮
叶佳卓
ZHOU Zhao-xia;WU Shi-yu;ZHANG Liang;YE Jia-zhuo(College of Electrical and Information Engineering,Hunan University,Changsha 410082 China;Zhouyuanshan Mining Branch Company,Hunan Black Gold Time,Co.,Ltd.,Chenzhou 423404 China)
出处
《自动化技术与应用》
2020年第1期17-20,29,共5页
Techniques of Automation and Applications
基金
国家自然科学基金资助项目（编号51877073）
湖南省重点研发计划项目（编号2017SK2182）
