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题名	基于DSP与FPGA的三电平PWM整流器研究; 基于DSP与FPGA的三电平PWM整流器研究
作者	1张彦民,电工研究所
学位类别	硕士
答辩日期	2009-05-31
授予单位	中国科学院电工研究所
导师	1葛琼璇,电工研究所
关键词	三电平 PWM整流器 FPGA 优化PWM Three-level PWM rectifier FPGA Optimal PWM
其他题名	基于DSP与FPGA的三电平PWM整流器研究
中文摘要	三电平PWM整流器以其特有的拓扑结构及多电平特性，具有器件承受的电压应力小，交直流电压电流稳定，谐波成分容易消除，功率因数高和能量双向流动等优点而逐渐取代传统的相控整流被广泛应用于中高压，大功率调速领域和电力系统。论文以二极管中点钳位（NPC）三电平PWM整流系统为研究对象，在理论分析，计算机仿真和实物实验三方面进行了深入研究。本文介绍了系统各个环节的数学模型，提出了相应的控制策略并做了计算机仿真和实验验证。 为了满足高性能的控制要求，采用多环控制策略，除了对电压电流等状态变量进行控制外，还对整流器器的PWM调制策略进行优化控制。介绍了多种PWM调制方法和技术并详细分析了三电平矢量PWM和载波调制方法的关系，基于各种PWM调制方法的比较和硬件特点本文采用优化的载波比较的PWM调制方法。 传统的三相电压型三电平PWM整流器需要十二路PWM发生器，基于现场可编程逻辑门阵列（FPGA）串行计算和多接口的优点，本文采用了数字信号处理器（DSP）与FPGA配合的控制器结构，其中DSP负责采样计算和读取故障信号，完成故障处理；FPGA负责外部设备管理，故障保护和PWM波的产生。利用FPGA一方面可以扩展DSP的脉冲输出个数并很好的实现同步触发，另一方面通过其硬件编程能力实现一种优化的PWM调制策略从而分担了DSP的计算量。实验结果表明，本系统具有良好的控制性能。 设计了一台二极管中点箝位的三电平PWM整流器，采用TMS320F2812型号的DSP和SPATAN3系列的FPGA为控制核心进行实时控制。对各种工况进行试验，验证了理论分析和计算机仿真。 Multilevel converters have gained its popularity in drive systems. Among them, the three-phase, three-level, neutral-point-clamped (NPC) rectifier is one of the most popular topology because of its advantages. Such as: lower power device blocking voltages, a higher switching frequency resulting in a lower THD, bi-directional power flow, a controllable DC bus voltage, and power-factor correction . This paper focuses its researches on three-level PWM rectifier system. Theory analysis, simulation and experimentation are made to investigate its character. This article describes the various aspects of the system mathematical model, the corresponding control strategy and has done a computer simulation and experimental validation. In order to meet the control requirements of high-performance, multi-loop control strategy is adapted, in addition to voltage and current, also the PWM modulation is concerned. a variety of methods of PWM modulation is introduced and a detailed analysis of the three-level PWM vector modulation methods and the relationship between the PWM carrier modulation method . In this paper, an optimized PWM carrier modulation method is applied based on DSP and FPGA. An FPGA is employed to generate all 12 PWM signals with critical timing. Space Vector Modulation (SVM) is a popular PWM scheme for multilevel converters mainly due to its flexibility and good harmonic profile. However, the digital implementation of conventional SVM scheme is normally not easy. In this paper, the mathematical models and mechanism of the three-level neutral point clamped (NPC) rectifier are analyzed, and an improved PWM modulation scheme is proposed for the rectifier. The modulation scheme is implemented with a FPGA and a digital signal processor (DSP). FPGA is responsible for external equipment management, fault protection and the PWM pulse generation. The experimental results show that this system has good control performance. At last, the author designed a three-level NPC PWM rectifier platform. The real time control of the system based on TMS320F2812 DSP and SPATAN3 series FPGA. Experimental results in various conditions verify the theoretical analysis and computer simulation.
语种	中文
公开日期	2010-10-18
页码	79
分类号	TM1;TM921
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7157]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1张彦民,电工研究所. 基于DSP与FPGA的三电平PWM整流器研究, 基于DSP与FPGA的三电平PWM整流器研究[D]. 中国科学院电工研究所. 2009.

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