三相电压型PWM整流器定频模型预测控制

发布时间：2018-04-14 06:23

本文选题：电压型PWM整流器 + 定频模型预测控制　；参考：《电机与控制学报》2014年03期

【摘要】：针对模型预测控制(model predictive control,MPC)采样频率较高、开关频率不确定等问题,提出了一种三相电压型脉宽调制整流器(voltage source PWM rectifier,VSR)定频模型预测控制(model predictive control with fixed switching frequency,FSF-MPC)。分析了三相VSR各电压矢量在六个扇区内对d、q轴电流瞬时变化的影响,基于电流预测模型,在固定时间间隔内以满足电流误差最小为原则计算各电压矢量作用时间。采用空间矢量调制原理获得功率器件的开关状态,实现模型预测控制的定频控制。1 kW样机的仿真与实验结果表明,与不定频模型预测控制相比,所提FSF-MPC控制算法开关频率恒定,且无需较高的采样频率,可有效降低纹波电流和电流失真,提高三相VSR系统的运行性能。
[Abstract]:Aiming at the problems of high sampling frequency and uncertain switching frequency of the model predictive control (MPC) model, a three-phase voltage-source pulse width modulation rectifier, voltage source PWM rectifier, is proposed. The predictive model control with fixed switching frequency control is proposed for FSF-MPCs.The influence of three phase VSR voltage vectors in six sectors on the instantaneous variation of DC Q axis current is analyzed. Based on the current prediction model, the action time of each voltage vector is calculated with the principle of minimum current error in a fixed time interval.The switching state of power devices is obtained by using the principle of space vector modulation. The simulation and experimental results show that compared with the unfixed frequency model predictive control, the switching frequency of the proposed FSF-MPC control algorithm is constant compared with the unfixed frequency model predictive control.Without high sampling frequency, the ripple current and current distortion can be effectively reduced, and the performance of three-phase VSR system can be improved.
【作者单位】：河南师范大学河南省光伏材料重点实验室;新乡供电公司;
【基金】：国家自然科学基金(51207104) 河南省教育厅科学技术研究重点项目(13B470083) 河南师范大学博士科研启动基金(01026500122,01026500119) 河南师范大学青年科学基金(2013QK04) 河南省重点科技攻关项目(102102310041)
【分类号】：TM461

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