线路电抗对系统小干扰稳定性的影响  

Effect of Line Reactance on Small-signal Stability in Power System

作　　者：许政委[1] 刘家岩[2] 刘诗[1] 

机构地区：[1]吉林供电公司,吉林吉林132001 [2]东北电力大学,吉林吉林132012

出　　处：《吉林电力》2007年第5期14-16,28,共4页Jilin Electric Power

摘　　要：针对输电线路电抗对系统小干扰稳定性的影响,采用发电机经典二阶模型,通过特征值灵敏度计算,指出对系统小干扰稳定性影响最大的线路往往是两互联系统联络线,同时提出了计算转折点处电抗值(X=0.041)的方法,系统受到微小扰动后,当X=0.044时发电机功角呈增幅振荡趋势;当X=0.041时,发电机功角呈减幅振荡趋势。为线路安装可控电抗器提供参考依据。Transmission-line reactance is one of significant facts impacting on small-signal stability, adopting the classic second derivative of y with respect to x model of generator, through calculating eigenvalue sensitivity, this paper gets the line, which is the most significant facts impacting on small-signal stability in power system. Generally this line is the tie line of two areas. The reactance calculation method on the transition location （X= 0. 041）is also provided. After the system on a small-signal, the growing oscillation tendency of the generator power and angle is occurred when X= 0. 044 and the decaying oscillation tendency of the generator power and angle is occurred when X = 0. 041. This paper provides a principle of calculating reactance, which can be used as a powerful tool for installing controlled reactor. The foundation of installing controlled reactor is refered.

关 键 词：电抗 输电线路 小干扰稳定 灵敏度 联络线 阻尼比 

分 类 号：TM712[电气工程—电力系统及自动化]