PWM-CSR有限控制集模型预测控制  

Finite Control Set Model Predictive Control of Current Source Rectifiers

作　　者：李晓竹[1] 王颖[1] 孟娜[1] 

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：《电气传动》2014年第10期44-48,共5页Electric Drive

摘　　要：针对电流型PWM整流器(PWM-CSR)传统控制方法计算量大、输入电流谐波含量大、采样频率高的问题,将有限控制集模型预测控制方法应用到PWM-CSR中,并引入"虚拟电阻"技术来减缓变换器前端LC滤波器引起的谐振。首先根据PWM-CSR拓扑结构建立其离散状态空间模型,然后分析PWM-CSR的开关函数组合(控制集)个数,选择使系统优化性能函数最小的开关函数组合作用于PWM-CSR,结合"虚拟电阻"减缓滤波器的谐振,改善输入电流波形。仿真和实验结果表明,该方法能有效降低网侧电流的总谐波畸变率,具有很好的鲁棒性和快速的动态响应。Aiming at the problems of current source PWM rectifiers （PWM-CSR） , which traditional control method needs amounts of calculation, input current with large of harmonics content and high sampling frequency, finite control set model predictive control was applied to PWM-CSR and virtual resistance was proposed to improve resonance of LC filter. Firstly, the discrete state-space model was built based on PWM-CSR topologies. Then switching function sets of PWM-CSR was analyzed. Then optimal switching function sets was selected for PWM-CSR. Virtual resistance was applied to mitigate resonance of LC filter and improve input current in grid . The simulation and experiment results show that the PWM-CSR controlled by the finite control set model predictive control strategy can reduce the total harmonic distortion of grid current effectively, then has good compensation performance and robustness.

关 键 词：电流型整流器 单位功率因数 有限控制集 模型预测控制 

分 类 号：TM461[电气工程—电器]