【作者】 牛犇；

【导师】 余贻鑫；

【作者基本信息】 天津大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 近年来,世界上许多国家的电力系统相继发生了电压失稳和电压崩溃事故,包括最近发生的美加大停电,造成了巨大的经济损失和社会影响。电压稳定问题越来越受到人们的重视,寻求完善的电压稳定监控手段成为目前研究的热点之一。本文中所谓的割集功率空间是指以系统割集线路上的有功功率为坐标所组成的空间,割集功率空间上静态电压稳定域(Static Voltage Stability Region inCut-set Space,简称CVSR)是指在割集功率空间上能够保持系统静态电压稳定并且满足线路容许电流、母线电压和注入功率上下限等约束条件的运行区域。已有研究表明割集功率空间上静态电压稳定域的边界可在较大范围内以超平面的形式近似拟合,在三维空间中体现为一空间平面,这样的结论降低了其可视化算法上实现的难度,对于开发一种电压稳定可视化监控系统有着非凡的意义。可视化在国内外电力领域中的应用研究尚处于起步阶段.从内容上看反映电力系统运行状态的可视化研究居多,而缺乏针对安全稳定等问题的工程应用研究。本文以割集功率空间上静态电压稳定域的理论成果为基础,采用OpenGL三维可视技术,着重研究了割集功率空间上静态电压稳定域的可视化及其作为一种电压稳定监控手段的工程应用问题,主要工作如下:1,本人在Windows操作系统下,Visual C++的环境中进行软件开发,将OpenGL嵌入到C语言当中,自行研究绘图算法,着眼于实现一种真实的三维可视化效果,描绘既定断面的三维超平面和二维投影图。2,以Motif作为工具成功的将可视化程序移植到Unix系统上,研发出了具有良好通用性的电力系统CVSR可视化模块。它可以给出系统各个断面的电压稳定严重程度排序结果,提供CVSR的一维、二维和三维生动直观的图形显示,以便从不同方向观察系统的电压稳定裕度,监视系统的电压稳定水平,方便调度人员在紧急情况下采取正确和必要的措施。该可视化模块现已成功应用于河南省电力调度与通信中心,这在国内外范围内尚属首次。3,完成了电压稳定监控程序与河南省调EMS系统实时数据接口部分的软件开发工作,为潮流和稳定分析计算提供重要的基本数据文件。更多还原

【Abstract】 In the recent years, many voltage collapse accidents have happened in the powersystems of different countries, including the American and Canada 8.14 accident, allof these brought tremendous economic losing and very bad social influence.Therefore to seek a kind of perfect voltage stability monitoring means has become thehotspot of current research.The so-called cut-set power space in this thesis consists of the active power flowin cut-set lines. The static voltage stability region in cut-set space (CVSR) means thefeasible operation region in which any point can meet system voltage stabilityconstraints, electric current limits of lines, voltage limits of buses and power limits ofinjections. The recent studies on static voltage stability region in cut-set space showedits boundaries can be approximated in HP (hyper-planes) in large ranges, and theboundary appears a plane in 3D space. This fact reduces the realization difficulties ofthe visualization algorithms, has crucial significance to develop a kind of voltagestability monitoring system.The research of visualization applied in power system has recently begun. Fromits content, most of the visualization studies are absorbed in the operation state ofpower system, but the visualization application to the problem of stability is absent.All the research of this thesis is based on the conclusions of static voltage stabilityregion in cut-set space. The author uses OPENGL as the 3D visualization tool, andstudies the visualization problem and its engineering applications, so that thefollowing results are derived:First, the author developed a software package in the environment of VISUALC++ on the WINDOWS operation system, implanted OPENGL to the C programminglanguage, aimed at realizing a kind of genuine 3D effect, described the 3D planes andits 2D projections.Second, another software package using MOTIF on the UNIX platform has beendeveloped for the use of power system voltage stability monitoring. It can provide tothe users the voltage stability margin in different power flow increasing directions onthe same cut-set, display the boundaries of voltage stability region as planes in3-dimension and lines in 2-demension. The operators in dispatch center can takecorrect and timely emergency measures according these results. This softwarepackage has run in He-Nan Electric Power Dispatching and Communication Centersuccessfully.Third, the data interface between the voltage stability monitoring system and theEMS of He-Nan power system has been achieved, and it can provide elementary datafiles for the calculation of power flow and stability analysis.更多还原