文档介绍：邵阳学院
毕业设计(论文)
课题名称混合有源滤波器及其稳态补偿特性分析
学生姓名
学号 0 2 4 1 3 2 6 0 8 5
院(系)、专业信息与电气工程系电气工程及其自动化
指导教师
职称讲师
2006 年 6 月 6 日
摘要
随着越来越多的非线性负荷在电网中的应用,电网的“谐波污染”问题日益严重,对电网的安全、稳定、经济运行造成了很大的影响。有源电力滤波器具有比无源滤波器更好的滤波性能,因此成为近年来电网谐波抑制的重要手段。但单独使用有源电力滤波器成本较高,基于此,各种兼有有源电力滤波器优良补偿性能和无源滤波器低成本的混合型有源电力滤波器拓扑相继推出。本文首先对电网“谐波污染”和谐波抑制技术进行了简单的综述,然后对有源电力滤波器的基本原理进行了分析。在此基础上,文章重点介绍了一种注入式混合有源电力滤波器拓扑,给出了电路拓扑,对其构成部分进行了说明。在这种拓扑结构中,无源支路在补偿无功功率的同时还可以滤除因非线性负载产生的特征谐波电流。有源部分采用了注入式电路,用来抑制无源支路跟电网等效电感产生的谐振现象以及改善无源滤波器的滤波性能。论文对该混合补偿系统的稳态补偿性能、抑制谐波谐振性能进行了详细的分析,并对补偿方案进行了数字仿真。仿真结果和实验结果证明了所提出的混合有源滤波器的可行性和正确性。
关键词:谐波污染;混合有源滤波器;无功补偿;功率因数;
ABSTRACT
As more nonlinear loads in the grid applications, grid "harmonics pollution" growing problem, of the grid security, stability, economic performance have had a great impact. Active power filter is better than passive filters filter performance, and therefore in recent years e an important means of curbing grid resolved. However, the use of separate active power filter higher costs, because of this, mercial active power pensation performance and excellent low-cost hybrid passive filter active power filter over essively introduced. The first grid "harmonics pollution," and resolved to contain a simple synthesis technology, and the basic principles of active power filter analyzed. On this basis, the article focused on a hybrid active power filter into line, given the circuit order, a description of ponents. In this configuration, the passive filter of pensation system can be use pensation reactive power as well as for harmonic mitigation caused by the nonlinear load. The active power filter which adopted the injection type topology has the function of damping the resonance between the passive filter and the equivalent inductance of the work and improving pensation characteristic of the passive power filter. The pensation characteristic of pensation system and the resonance damping are analyzed in detail and the digital simulation is performed. The feasibility and the vali