基于TMS320LF28xx的有源电力滤波器设计.doc

分类号： U D C： 密 级： 编 号： 学位论文 基于TMS320LF28xx的有源电力滤波器设计 论文作者姓名： 申请学位专业： 电气工程及其自动化 申请学位类别： 工学学士 指导教师姓名（职称）： 论文提交日期： 基于TMS320LF28xx的有源电力滤波器设计 摘要 随着电力电子装置日益广泛的应用，电力电子装置自身所具有的非线性导致了电网中含有大量谐波，这些谐波给电力系统带来了严重的污染，严重危害了用电设备和通信系统的稳定运行。虽然传统的无源电力滤波器具有结构简单、成本低、技术成熟、运行费用低等优点，但同时也有一些缺点，例如只能抑制固定的几次谐波，并对某次谐波在一定条件下会与电网阻抗产生谐振反而而使谐波放大。 目前，谐波抑制的一个重要趋势是采用有源电力滤波器，有源电力滤波器也是一种电力电子装置，且相关技术的研究也日渐成为研究的热点。本文阐述了几种常见APF的拓扑结构及各自的优缺点，详细分析了基于瞬时无功功率理论的谐波检测方法，比例控制和前馈控制两种电流环控制策略以及SPWM和SVPWM两种调制策略。介绍了电力有源滤波器的基本原理和结构，并设计了并联型有源电力滤波器的控制系统。该系统包括指令电流运算、PWM控制和驱动电路模块。在matlab中建立了各个子模块的仿真模型和并联型有源电力滤波器的整体仿真模型。仿真结果表明,其谐波抑制和无功补偿可以达到良好的效果,在技术上是可行的。 关键词： Design of Active Power Filter Based on MATLAB Abstract With the development of power electronic device the increasingly widespread application of power electronic device, which has resulted in a nonlinear network contains a large number of harmonics, the harmonic of power systems has brought serious pollution, serious harm to the electrical equipment and the stable running of the communication system. although the traditional passive power filter has the advantages of simple structure, low cost, mature technology, low running costs, but it also has some disadvantages, such as only the inhibition of stationary harmonics, and a harmonic under certain conditions and the grid impedance resonance instead of the harmonic amplification. Currently, the harmonic suppression is an important trend of active power filters, active power filter is a power electronic devices, and related technologies are increasingly become a hot topic. This paper describes the topology and their advantages and disadvantages of several common APF, a detailed analysis of the harmonic detection method based on instantaneous reactive power theory, and proportional control and feedforward control of two current-loop control strategy, and both SPWM and SVPWM modulation strategy. Introduced the basic principles and structure of the active power filter, and design of a shu