含HVDC的电力系统次同步振荡参数稳定域的可视化分析  

VISUALIZATION AND ANALYSIS OF THE PARAMETRIC STABILITY REGION OF SUBSYNCHRONOUS OSCILLATIONS IN AC/DC POWER SYSTEM WITH HVDC LINK

作　　者：王西田[1] 杨帆[1] 杨秀[1] 陈陈[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200030

出　　处：《电力系统自动化》2004年第7期39-43,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究专项经费资助项目(G1998020310);中国博士后基金资助项目(2003033301)。

摘　　要：采用特征值分析法研究交直流电力系统中HVDC换流器控制对次同步振荡(SSO)模态阻尼的影响。利用MATLAB的数值计算和数据可视化能力,计算并在三维空间绘制了SSO模态阻尼相对于整流器控制参数平面的轨迹曲面,并提出一种可视化描述SSO参数稳定域的巧妙方法。发现各SSO模态都有一条最佳的模态阻尼脊线,阻尼不是分别随整流控制器增益和时间常数单调变化的。因此,减小时间常数和提高增益可以从参数不稳定域到达参数稳定域或者远离参数不稳定域,有利于提高鲁棒稳定性,但并不总是有利于改善SSO模态阻尼。The influence of HVDC converter controls on the mode damping of sub-synchronous oscillations (SSO) in a AC/DC power system is investigated in this paper by using eigenvalue analytical method. Taking the advantage of the numerical calculation and data visualization functions in MATLAB, the curved surface of SSO mode damping to parametric plane of the rectifier control is calculated and drawn in three-dimensional space. Furthermore, an approach is proposed to visualize the parametric stability region of SSO. For every SSO mode, an optimal damping ridgeline is discovered and damping variation with gain and time constant of the rectifier control is not absolutely monotonous. Decrease of time constant and increa.se of gain can make SSO modes depart from the parametric instability region to the parametric stability region or far from the former. The trend is beneficial to robust stability, however, not always beneficial to mode damping.

关 键 词：HVDC 次同步振荡 模态阻尼 参数稳定域 可视化 

分 类 号：TM711[电气工程—电力系统及自动化]