摘要我们国家地大物博,西部的能源丰盛而东部紧缺,但是用电需求却明显比西部高,再加上三峡水电站、葛洲坝发电厂的使用,决定了我们要推行西电东送的举措。而远距离输电、电网大范围的连接,造成低频振荡的产生,对我们平稳地供电产生巨大威胁,极大阻碍了经济的发展。电力稳定器(PSS)是目前应用在电力系统低频振荡上最广泛的装置,因为它的作用高效,功能十分强大,而且技术是比较先进成熟的。本论文查阅大量的资料,了解电网为什么发生低频振荡和怎么样去防止或抑制振荡;了解PSS怎样把低频振荡消除;使用MATLAB/Simulink来模拟实验,通过加入PSS时波形图的摆动次数来说明系统有没有显著增强稳定,并且详细阐述了PSS在里面有什么作用。82941
毕业论文关键词 电力系统低频振荡 电力系统稳定器 阻尼 MATLAB
毕业设计说明书外文摘要
Title Research of Low frequency oscillation of power system based on PSS
Abstract Our country vast territory and abundant resources, the western energy rich and Eastern shortage,the eastern part of the demand for electricity is far higher than that of the western,plus the Three Gorges hydropower station,Gezhouba power plant use,decided our country to implement the measures of power transmission from west to East。 And long distance transmission,the power grid connection, leading to the low frequency oscillation in the power grid,we have a huge threat to a stable supply of electricity,a serious impact on the development of the economy。 Power stabilizer (PSS) is the most widely used in power system low frequency oscillation device,because it is the role of high efficiency,the function is very powerful,and the most mature technology level。 This thesis consults a lot of data,understand the grid why low frequency oscillation and how to prevent or suppress the oscillation; PSS understanding how to eliminate the low-frequency oscillations; by using Matlab /simulink for simulation experiments,by the addition of PSS to illustrate the single machine infinite bus system with did not significantly enhance stability,and elaborates the PSS in the inside what role。
Keywords low frequency oscillation Power system stabilizer
Damping MATLAB
目 次
1 绪论 1
1。1 论文研究的背景 1
1。3 电力系统稳定器发展趋势 2
1。4 本轮文主要工作 2
2 电力系统低频振荡的介绍 3
2。1 电力系统稳定 3
2。2 电力系统低频振荡的原因 4
2。3 低频振荡的解决方法 5
2。4 本章小结 6
3 电力系统稳定器 7
3。1 电力系统低频振荡的分析模型 7
3。2 电力系统稳定器的工作原理 12
3。3 电力系统稳定器传递函数 13
3。4 本章小结 14
4 电力系统稳定器MATLAB仿真分析