基于DSP的三电平有源电力滤波器设计与实现

发布时间：2018-05-28 16:43

本文选题：三电平有源电力滤波器 + 谐波检测　；参考：《哈尔滨理工大学》2017年硕士论文

【摘要】：随着科技的进步,电力电子技术得到了广泛的应用,大量非线性负载接入电网中带来了谐波污染,影响电网的电能质量。有源电力滤波器(Active Power Filter,APF)作为一种能够实现谐波动态补偿、改善电能质量的装置,逐渐得到了广泛的关注。本文以三电平APF的原理及设计为研究方向,主要从谐波电流检测方法、谐波电流的跟踪控制、三电平APF系统的仿真以及硬件部分的研制等方面对其进行研究。首先,本文介绍了谐波的产生及其危害,总结了国内外APF的分类和发展现状,分析了三电平APF的优势及发展前景。确立了三电平APF为本文的主要研究对象。其次,本文通过分析对比APF的几种谐波电流检测方法,采用了基于瞬时无功功率理论的谐波电流检测法。同时对APF的跟踪控制方法进行了分析,采用三电平空间矢量脉宽调制(Space Vector Pulse Width Modulation,SVPWM)算法对APF进行跟踪控制。通过对三电平APF的电流检测方法及跟踪控制方法进行深入分析,在传统三电平SVPWM算法的基础之上,采用了三电平SVPWM的简化算法。并针对三电平APF直流侧电容中点电压不平衡问题提出了解决办法。运用Simulink对三电平SVPWM简化算法以及三电平APF系统进行了仿真,仿真结果表明本系统实现了谐波的补偿,证明了简化的三电平SVPWM算法是有效的。最后,本文结合理论研究及仿真实验,设计了基于数字信号处理器(Digital Signal Processor,DSP)TMS320F28035控制的三电平APF实验系统。以TMS320F28035为核心的控制系统能够生成PWM控制信号,控制信号输送到驱动电路中,通过驱动电路控制主电路实现谐波电流的补偿。完成了三电平APF实验系统的设计和调试,通过对系统进行谐波补偿的实验,结果表明该系统能实现谐波补偿,达到了预期的目标。
[Abstract]:With the development of science and technology, power electronics technology has been widely used. A large number of nonlinear load connected to the power network brings harmonic pollution, which affects the power quality of the power grid. Active Power filter (APF), as a device that can realize harmonic dynamic compensation and improve power quality, has been paid more and more attention. In this paper, the principle and design of three-level APF are taken as the research direction. The harmonic current detection method, the tracking control of harmonic current, the simulation of three-level APF system and the development of hardware are studied. Firstly, this paper introduces the generation and harm of harmonics, summarizes the classification and development status of APF at home and abroad, and analyzes the advantages and prospects of three-level APF. Three-level APF is established as the main research object of this paper. Secondly, by analyzing and comparing several harmonic current detection methods of APF, the harmonic current detection method based on instantaneous reactive power theory is adopted. At the same time, the tracking control method of APF is analyzed, and the three-level space vector pulse-width modulation (SVPWM) algorithm is used to track and control APF. By analyzing the current detection method and tracking control method of three-level APF, the simplified three-level SVPWM algorithm is adopted based on the traditional three-level SVPWM algorithm. A solution to the unbalanced neutral point voltage of three-level APF DC-side capacitor is proposed. The three-level SVPWM simplification algorithm and the three-level APF system are simulated by using Simulink. The simulation results show that the system realizes harmonic compensation and proves that the simplified three-level SVPWM algorithm is effective. Finally, a three-level APF experimental system based on digital signal processor digital Signal processor TMS320F28035 is designed based on theoretical research and simulation experiments. The control system with TMS320F28035 as the core can generate the PWM control signal, and the control signal can be transmitted to the drive circuit, and the harmonic current compensation can be realized by the driving circuit controlling the main circuit. The design and debugging of the three-level APF experimental system are completed. The results show that the system can achieve harmonic compensation and achieve the desired goal.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761;TN713.8

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