摘要：近年来，现代工业、商业和居民用户对电能质量的要求越来越高，人们的生活已经离不开电。配电系统是电力系统直接与用户相联的一个环节，因此如何灵活地运用交流输电于配电系统中，提高电力系统的安全性并改善供电质量成为了当今的热门话题。39059
本文首先介绍了无功补偿的发展历史，提到了其中几款比较重要的无功补偿装置。然后着重介绍了本次论文设计的对象，SVG静止无功发生器，对其基本原理以及结构做了研究，同时对其运算特性和稳定性进行了计算分析，并建立了SVG数学模型。为了能快速准确地获得无功电流信号，本文选取了基于dq坐标变换的电流矢量检测方法。控制策略方面，本文应用了SVG双闭环控制策略，这样便可以实现无功电流的实时动态补偿。
单片机硬件方面，由于本文以MATLAB仿真为主，因此硬件方面以介绍和参考几个主单元的电路以及各个子程序的流程图为主。
毕业论文关键词：无功补偿；静止无功发生器；MATLAB仿真；单片机。
The design of the low voltage reactive power compensator based on the Single chip microcomputer
Abstract：In recent years, modern industry, commercial and residential users of the power quality requirements are increasingly high, people's life has been without electricity. Power distribution system of electric power system is directly associated with the user, Therefore, how to flexibly using AC transmission in power distribution system, improve the security of the power system and improve the quality of power supply has become a hot topic nowadays.
This paper first introduces the development history of reactive power compensation and a few of the more important of reactive power compensation devices are mentioned. Then the SVG(static var generator)is introduced in the paper and did some research on its basic principle and structure. At the same time, the operation and stability of its calculation and analysis are carried out, and the SVG model is established. In order to obtain the reactive current signal quickly and accurately, the current vector detection method based on dq coordinate transformation is selected. In the control strategy this paper applied the SVG double closed loop control strategy,thus can realize real-time dynamic compensation of reactive current.
In terms of the Single chip microcomputer, because this paper is based on MATLAB simulation, so the hardware is based on the introduction of several main units of the circuit and the flow chart of each subroutine.
目录
1 绪论 - 1 -
1.1 课题的背景及意义 - 1 -
1.2 无功补偿技术的发展过程 - 1 -
1.2.1 早期无功补偿技术 - 1 -
1.2.2 现代无功补偿技术 - 2 -
2 无功补偿的基本理论 - 9 -
2.1 无功功率的概念 - 9 -
2.2 电力系统无功补偿的特点和种类 - 10 -
2.3 无功补偿的作用 - 11 -
2.3.1 提高功率因数，降低设备容量，减少功率损耗 - 11 -
2.3.2 稳定受电端及电网电压，提高供电质量 - 12 -
3 SVG 静止无功发生器 - 13 -
3.1 SVG基本结构 - 13 -
3.2 SVG基本原理 - 13 -
3.3 SVG数学建模 - 15 -
3.3.1 SVG输入输出特性建模 - 15 -
3.3.2 SVG系统拓补结构建模 - 17 - 单片机控制的低压无功功率补偿器设计+SVG数学模型:http://www.youerw.com/zidonghua/lunwen_38171.html