并网逆变器简化矢量选择定频预测电流控制  

Grid-connected Inverter Simplified Vector Selection and Fixed-frequency Predictive Current control

作　　者：任志玲[1] 王继超 REN Zhi-ling;WANG Ji-chao(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学,电气与控制工程学院,辽宁葫芦岛125105

出　　处：《控制工程》2023年第5期903-909,共7页Control Engineering of China

基　　金：辽宁省教育厅科研项目(LJKZ0332);辽宁省高等学校国(境)外培养项目(2019GJWZD002)。

摘　　要：双矢量模型预测控制需要用遍历法预测基本电压矢量组合作用下的系统行为,计算量较大,同时因为缺乏调制单元而存在开关频率不固定和并网谐波含量高的问题。为此,提出一种并网逆变器简化矢量选择预测电流定频控制。通过判断电流预测差值所在扇区,每个周期采用3个电压矢量控制,通过电流无差拍计算每个电压矢量作用时间,结合不连续DPWM1调制得到开关信号,实现计算量减小,输出电流定频控制且谐波含量降低。仿真和实验结果验证了所提方法的可行性和有效性。The dual-vector model predictive control needs to use the ergodic method to predict the system behavior under the combination of the basic voltage vector,which requires a large amount of calculation.At the same time,there are problems of unfixed switching frequency and high grid-connected harmonic content due to the lack of modulation.For this reason,a simplified vector selection predictive current fixed-frequency control of grid-connected inverter is proposed.By judging the sector where the current prediction error is located,each cycle adopts three voltage vectors control,calculating the action time of each voltage vector through the current deadbeat,and combining the discontinuous DPWM1 modulation to obtain the switching signal,so as to reduce the amount of calculation,the output current is controlled by fixed frequency and the harmonic content is reduced.Simulation and ex results verify the feasibility and effectiveness of the proposed method.

关 键 词：模型预测控制 电压矢量 并网逆变器 定频控制 

分 类 号：TM464[电气工程—电器]