【作者】 王维；

【导师】 何顶新；

【作者基本信息】 华中科技大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 随着电力电子技术的发展,供电系统中增加了大量的非线性负载,向电网中注入谐波,严重地影响电能质量和供电安全。有源滤波APF是解决谐波问题的最佳方法,其主要思路是检测出谐波和无功电流,然后进行补偿和抑制控制。APF国外研究比较成熟,国内研究基本上还是处在理论和实验室研究阶段,工程应用上的比较少。有源滤波系统中一个关键的环节是谐波和无功电流的检测,如何实时准确的检测出谐波是实现精确补偿控制的前提,也是有源滤波技术应用所急需解决的课题。本文综合国内外有源滤波器的研发技术现状,针对各种谐波和无功电流的检测方法,进行分析讨论,设计出一套行之有效的方案。硬件结构上分为信号检测和控制两部分。检测板实现信号的处理和转换,控制板对采集的数据进行运算,检测板和控制板之间通过SPI通讯,为了实现电气隔离,信号通过光纤进行传输。硬件电路从设计方案到芯片选型都考虑到信号检测的实时性和准确性;软件上,对采集的数据进行解码,得出各路信号的实际值,再依据瞬时无功功率理论,采用ip、iq运算方式,通过坐标变换和数字滤波,得出谐波和无功电流分量。在软件编写中,考虑了程序模块化和参数可修改等因素。文中对各部份的设计细节进行了详尽介绍,并搭建了实验和仿真平台。对实验中基于光纤通讯出现的时序问题进行了探讨;对信号检测中的实验波形和部分实验现象作了初步分析;利用Saber仿真软件对基于瞬时无功功率理论的谐波检测方法进行了验证。试验证明,该设计方案实用可行,达到预定的设计目标。更多还原

【Abstract】 With the development of power electronics technology, lots of nonlinear load appears in power supply system which injects harmonics into power line so that the electric energy quality and power supply safety are heavily affected. APF (Active power Filter) is the optimal solution to harmonics, which is achieved through detecting the harmonics and idle current, then making compensation and exerting suppression control.The research on APF has been mature at abroad, however which on the whole is still at the stage of theory and laboratory research with less applications in engineering at home. The crucial part in APF system is the detection of harmonics and idle current, and how to detect harmonics accurately under real time is the premise of implementing precise compensation control and is also the needed-to-solve problem of APF application technology. In this thesis, an effective scheme is proposed after making discussion, combined the research technology status at home and abroad, on various kinds of detecting methods of harmonics and idle current. The hardware structure is divided into two parts—signal detection and control.The crucial part in APF system is the detection of harmonics and idle current, and how to detect harmonics accurately under real time is the premise of implementing precise compensation control and is also the needed-to-solve problem of APF application technology. In this thesis, an effective scheme is proposed after making discussion, combined the research technology status at home and abroad, on various kinds of detecting methods of harmonics and idle current. The hardware structure is divided into two parts—signal detection and control.更多还原