【作者】 范瑞祥；

【导师】 周腊吾；

【作者基本信息】 湖南大学 ， 电机与电器， 2005， 硕士

【摘要】 随着工业电力电子技术的发展,电力系统中的非线性负载越来越多,由此带来的谐波公害越来越严重。应用现代技术对谐波等进行经济、有效地补偿是目前急待解决的重要问题之一。消除谐波的方法是加装滤波装置。对高压大容量谐波源国内外目前主要是采用LC谐振型无源滤波器(Passive Power Filter, PF),这些滤波器还兼有无功和负序补偿功能。尽管PF具有初期投资小、运行效率高等优点,但其滤波效果受电力系统阻抗的影响较大,且只能消除特定次数的谐波,对于谐波次数经常变化的负载滤波效果不好,还可能与系统发生串联、并联谐振,导致谐波放大,使LC滤波器过载甚至烧毁。进入80年代以后,随着有源滤波技术的不断深入和用户对谐波问题的重视,以及电力电子技术的飞速发展,大功率可关断器件(GTR, GTO, IGBT等)的不断进步,有源电力滤波器(Active Power Filter, APF)作为抑制电网谐波、补偿供电系统无功功率的新型电力电子装置得到迅速发展,其中又以并联型有源电力滤波器的使用最为广泛。 本文以并联型注入式混合有源滤波器为基础,就其设计与应用的几项重要技术进行了研究,论文主要包括以下几个方面的内容: 1.就国内外有源滤波器的研究现状和发展概况作了较为全面的综述,介绍了目前研究的热点与难点。 2.研究了各型有源滤波器的基本拓扑结构和运行原理,分析了其各自的优缺点。 3.提出了一种适合大容量工程应用的混合型滤波器结构,结合工程实际完成了各组成部分的参数设计。 4.对各种谐波检测算法进行了比较研究,提出了一种准确性较高、延时较短的新型检测方法。 5.就APF中逆变器的PWM调制问题,提出了一种基于新的改进规则采样法的死区补偿方法。更多还原

【Abstract】 As the rapid development of power electronic technology, non-linear loads bring the serious harmonic contamination. In order to improve the supply network quality, many kinds of compensators have been developed. One of the effective ways to solve such kind of problems is using filters. Passive Power Filter (PF) is always applied in the high voltage and large capacity conditions. The principle is LC resonance. Not only can be used for harmonic filtering, PF also can work for reactive power compensation. However, except the advantage of lower early investment and high operation efficiency, PF can not adjust to the changeful order harmonics and the filtering effect is easy to be influenced by the power system reactance. Sometimes the series and shunt syntony with main system would enlarge harmonics and make things worse.Active Power Filter (APF), as another kind of filter equipment, begin to make use following the advancement of GTR, GTO, IGBT and etc. The unique advantage of this new setting is dynamic harmonics canceling. Now, the shunt APF is the most widely used one.In this paper, based on a new type of parallel hybrid APF, some key technologies during the design and applications are mainly researched. The following items are included:1. The research status of APF, its history and developing future are summarized.2. The operation principles and basic configurations of all kinds of APF are investigated and compared here.3. This paper shows a new hybrid filter topology, which suits the application of large capacity project especially. At the same time, a parameter design method is discussed.4. By contrasting, a modified method of measuring harmonic is introduced. Matlab simulation affirms its veracity.5. A new dead-time compensation method based on improved regulation sampling measure is put forward.更多还原