交直交变频调速系统仿真研究.doc

摘要
随着电力电子技术、计算机技术、自动控制技术的迅速发展,交流变频调速技术得到了迅速发展,其显著的节能效益,高精确的调速精度,宽泛的调速范围,完善的保护功能,以及易于实现的自动通信功能,得到了广大用户的认可,在运行的安全可靠、安装使用、维修维护等方面,也给使用者带来了极大的便利。因此,研究交—直—交变频调速系统的基本工作原理和作用特性意义十分重大。
本文研究了变频调速系统的基本组成部分,主回路主要有三部分组成:将工频电源变换为直流电源的“整流器”;吸收由整流器和逆变器回路产生的电压脉动的“滤波回路”,也是储能回路;将直流功率变换为交流功率的“逆变器”。使用Matlab/Simulink搭建交—直—交变频调速系统的仿真模型,通过试验对该交—直—交变频调速系统的基本工作原理、工作特性及作用有更深的认识,也对谐波对于交—直—交变频调速系统的影响有了一定的了解。
关键词:交—直—交变频,整流,逆变,谐波,仿真。
Abstract
With power electronic technology, computer technology, automatic control tech-nology is developing rapidly, AC variable-frequency system technology has been de-veloping rapidly. Significant energy efficiency and precision and broad scope of spe-ed control, perfect protection and easy to implement munications, all which have win the many users acceptance . Therefore, studying the AC-DC-AC variablefrequency systerm for the role of the basic working principle and characteristics of great significance.
In this paper we studied the ponent of the variable frequency speed regulation system. There are three ponents: the "rectifier" which convert the AC power into DC power; the "loop filter " can absorbed the voltage pulse which the rectifier and inverter circuit generated by,it is also energy storage circuit; the “inverter” converts the DC power into the AC power. Then we used the Matlab / Simulink to build an AC-DC-AC Frequency Control System Simulation Model. Through the test of the AC-DC Frequency Control System to pay the basic working principle and working characteristics, we not only had a deeper understanding of the role,but also had a certain degree of understanding about the harmonic AC-DC-DC Frequency Control System.
Key Words :AC-DC-AC variable requency systerm, rectifier,inverter,harmonics, simulation
目录
摘要 I
Abstract II
1 引言 1
交流调速技术的发展 1
交直交变频调速系统研究的目的与意义 2
研究现状分析 3
2 交直交变频调速系统的基本原理及特性研究 7
系统的构成 8
交直交变频的基本工作特性 8
交直交变频调速的优越性 8
交直交变频调速合理应用 9
变频器容量的确定 10
熟悉Matlab的原理及应用及Simulink仿真 11
3 工作原理研究及仿真实