【作者】 汤锐利；

【导师】 席自强；

【作者基本信息】 湖北工业大学 ， 电力电子与电力传动， 2010， 硕士

【摘要】 随着现代工业技术的发展,电力系统中非线性负荷大量增加。各种非线性负载如逆变器、整流器以及各种开关电源等大规模的应用使得电网被注入大量的谐波分量,导致交流电网中的电压和电流波形严重失真,如今已成为最主要的谐波源。电能质量的综合治理已经成为现代电力发展的势必所在。有源电力滤波器(APF: Active Power Filter)是一种理想的谐波电流发生器,它能对频率和幅值都变化的谐波进行跟踪补偿,且补偿特性不受电网阻抗的影响,能够实现动态补偿,滤波特性较好,在治理电网谐波方面发挥着重要的作用。本文首先介绍了APF的原理,根据此原理提出了一个基于DSP控制的有源电力滤波器的设计方案,着重讨论了谐波检测和系统控制的硬件设计以及DSP的软件设计。这一套基于嵌入式的电能质量监测装置由信号调理、智能功率集成芯片IPM、DSP等外围电路组成,具有强大的数据采集和处理功能,能准确测量电网谐波,并应用DSP内的事件管理器产生PWM波形对其进行有效抑制。为了实现本文所采用的算法和控制策略,建立以TMS320F2812为核心的高速数字信号处理控制平台。并在此平台基础上设计了系统控制电路,在实验样机上进行谐波补偿的实验。其结果验证了本文所提出的谐波检测方法和控制策略的正确性和可行性,基本达到谐波抑制的要求。本文提出基于TI公司高性能DSP芯片TMS320F2812的电力有源滤波系统(APF),设计了针对电网高次谐波的实时补偿一套装置,包括电网信息的实时检测、数据采集,然后经FFT算法对数据进行并处理,得到各次谐波分量,同时根据其相应的FFT谐波抑制算法进行三相电压电流补偿及电力系统保护,最后通过仿真与实验验证所提方法的可行性。更多还原

【Abstract】 Along with the development of modern industrial technology, the non-linear loads in the power system are increasing. A variety of non-linear loads such as inverters, rectifiers, and various large-scale applications inject into a large of harmonic, while resulting in a serious waveforms distortion of power grid voltage and current, becoming the most important harmonic source nowadays. It is a trend for power quality to manage in the few years for the modern development of electric power. Active Power Filter(APF) is an ideal generator for harmonic current to restrain, it can track and compensate the frequency and amplitudes with changed, and the properties of compensation are not interfered by the grid impedance. It also achieved dynamic compensation which play an important role in governing power harmonics.This article firstly introduces the principles of APF, active power filter based on DSP digital controlled is presented according to this principle which focused on the hardware and software design of the harmonic detection and control based on DSP. This monitor based on embedded device consists of signal conditioning, smart power integrated chips IPM, DSP and other peripheral circuits which has a powerful data acquisition and processing capabilities, and accurately measure power harmonics. The harmonic is suppressed by the event management generator PWM of the DSP.In order to achieve algorithms and controlled strategies this paper used, the high-speed digital signal processing control platform is established by TMS320F2812. We designed circuit based on this platform and experiments on the harmonic compensation. The results validate the correctness and feasibility of harmonic detection and control strategy. Basically, this method can achieve harmonic suppression. The system based on TI high performance DSP chip TMS320F2812 APF aimed at compensating high-order harmonic which includes real-time network information, testing, acquisition, and the FFT algorithm used to data processing by the various sub-harmonic component. At the same time, the control algorithm according to three-phase voltage and current compensation and power system protection, constitutes a set of power system information detection collection, analysis and processing, monitoring, protection, and high-order harmonic compensation of multi-functional information collection and intelligent monitoring system.更多还原