【作者】 董明齐；

【导师】 刘文颖；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2007， 硕士

【摘要】 随着电力系统规模的不断扩大和快速励磁系统的引入,电力系统弱阻尼低频振荡问题日益突出。本文从机理上分析了电力系统弱阻尼产生的原因,并重点分析和比较了采取配置电力系统稳定器和加装输电系统结构这两种控制策略对电力系统弱阻尼低频振荡特性的影响。本文揭示了弱互联系统中的区域联络线的阻抗大幅削弱系统阻尼的机理,提出了弱互联系统联络线的负阻尼效应概念,指出加强互联系统之间的联络才能更有效地解决区域互联电网的低频振荡问题,最后以2007年西北电网的低频振荡问题为例进行了仿真验证。本文的研究成果希望对于西北750kV电网乃至我国特高压电网的建设具有一定的参考价值。更多还原

【Abstract】 With the continuous spreading of scale in power system and introducing of fast exciter system, the problem of low frequency oscillation which is arosed because of lacking-damping becomes worse and worse. This paper analyzes the mechanism reasons of insufficient-damping, then analyzes and compares primarily the effect of restraining the low frequency inter-area oscillation of Power system stabilizer(PSS) and reinforcement of the connection between two bulk power grids. This paper opens out the relatively large impedance of tie-lines in weakly interconnected systems could greatly reduce the damping of these system, puting forward the conception of negative damping effect of the weak tie-lines between power grids, and indicates the reinforcement of the connection between two bulk power grids is a essential correspondingly way to solve the low frequency inter-area oscillation. As an actual system example, Northwest Power Grid in 2007 was testified. Presuming upon this paper has some reference value for the development of Northwest 750kV Power Grid and UHV of china.更多还原