单相三电平脉冲整流器无差拍预测直接功率控制

发布时间：2018-01-15 01:15

本文关键词：单相三电平脉冲整流器无差拍预测直接功率控制　出处：《中国电机工程学报》2015年04期 　论文类型：期刊论文

【摘要】：以我国CRH2(China railways highspeed 2)型高速动车组的单相三电平脉冲整流器为研究对象,以提高其动态响应速度及控制精度为目的,该文首先建立单相三电平脉冲整流器数学模型,分析传统基于比例积分(proportional-integral,PI)控制器的定频直接功率控制(direct power control,DPC)的工作原理,在此基础上,提出一种基于自回归算法的单相无差拍功率预测DPC算法。与传统PI定频DPC算法相比,该DPC算法无需网压相位检测装置,如锁相环(phase locked loop,PLL),降低了硬件设计及软件编程的复杂度;而且由于采用自回归算法,实现了有功和无功功率的无差拍预测,提高了整流器负载动态变化时的响应速度。然后,结合内嵌中点电位平衡功能的单相三电平空间矢量调制算法(space vector pulse width modulation,SVPWM),构建了完整的单相三电平脉冲整流器DPC与SVPWM控制系统。最后,对该功率预测DPC和传统PI定频DPC算法分别进行了计算机仿真和半实物实验对比研究。仿真与实验对比分析结果证明了该无差拍功率预测DPC算法的正确性和有效性。
[Abstract]:Based on our CRH2 (China railways highspeed 2) single-phase EMU three level pulse rectifier as the research object, in order to improve the dynamic response speed and control precision for the purpose, this paper first presents the mathematical model of single-phase rectifier three level pulse, based on the analysis of the traditional proportional integral (proportional-integral, PI) controller with fixed frequency directly power control (direct power control, DPC) working principle, on this basis, we present a single regression algorithm based on Deadbeat predictive power DPC algorithm. Compared with the traditional PI frequency DPC algorithm, the DPC algorithm without line voltage phase detection device, such as a phase-locked loop (phase locked loop, PLL) that reduces the complexity of hardware design and software programming; and because of the self regression algorithm, the active power and reactive power deadbeat predictive, improve the response speed of the rectifier load dynamic change when. After the single-phase three level space vector modulation algorithm based on embedded midpoint potential balance function (space vector pulse width modulation, SVPWM), and construct a complete single phase three level pulse rectifier DPC and SVPWM control system. Finally, the prediction of DPC and traditional PI fixed frequency DPC algorithm are compared by computer simulation and semi physical experiment the power. Comparison between the simulation and experimental results prove the correctness and effectiveness of the deadbeat predictive power of DPC algorithm.

【作者单位】：西南交通大学电气工程学院;
【基金】：国家自然科学基金项目(51207131,51277153) 中央高校基本科研业务费专项资金(2682013ZT19,2682013CX017)~~
【分类号】：TM461
【正文快照】： 速度及控制精度为目的,该文首先建立单相三电平脉冲整流器数学模型,分析传统基于比例积分(proportional-integral,PI)控制器的定频直接功率控制(direct power control,DPC)的工作原理,在此基础上,提出一种基于自回归算法的单相无差拍功率预测DPC算法。与传统PI定频DPC算法相比

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