国内图书分类号：TM71国际图书分类号：621.31工学硕士学位论文基于能量函数与熵函数法的电力系统暂态稳定分析研究硕士研究生：黄晓鹏导师：李志民教授申请学位级别：工学硕士学科、专业：电力系统及其自动化所在单位：电气工程系答辩日期： 2007年 7月授予学位单位：哈尔滨工业大学Classified Index: TM71U.D.C: 621.31Dissertation for the Master Degree of EngineeringPOWER SYSTERM TRANSIENT STABILITYANALYSIS BASED ON TRANSIENT ENERGYAND INFORMATION ENTROPY FUNCTIONCandidate:Supervisor:Academic Degree Applied for:Specialty:Affiliation:Date of Defence:Degree-Conferring-Institution:Huang XiaopengProf. Li ZhiminMaster of EngineeringPower System and Its AutomationDept. of Electric EngineeringJuly, 2007Harbin Institute of Technology-哈尔滨工业大学工学硕士学位论文摘要随着经济的发展和技术的进步，电力系统将从区域性系统向区域互联系统发展，这给电力系统的运行与控制带来了很大的挑战，电力系统暂态稳定分析更显得尤为重要。本文基于能量函数和熵函数法分析电力系统暂态稳定性。分别从系统能量和单机能量角度，在 COI坐标和同步坐标下，利用信息熵法和 PEBS法判断系统暂态稳定性。其中，信息熵法有望进一步完善，成为电力系统暂态稳定分析的一种新的方法。在基于系统能量的暂态稳定性分析方面，以动能和势能为信源构造信息熵函数，通过理论分析得到基于系统信息熵函数的暂态稳定判据。对比分析了系统熵函数法在 COI坐标和同步坐标下判断暂态稳定是否具有可行性。算例系统的仿真结果表明，在 COI坐标下利用系统熵函数判断暂态稳定是有效的，其结果与时域数值仿真法得到的结果具有良好的一致性。在基于单机能量的暂态稳定性分析方面，分析了 COI坐标和同步坐标下暂态过程中单机能量的变化特征，仿真结果表明，在 COI坐标和同步坐标下利用单机熵函数均能有效判断电力系统暂态稳定性；同时给出同步坐标下单机 PEBS法临界机的选取原则，阐明临界机的意义，并讨论了同步坐标和 COI坐标下单机 PEBS法的区别。通过对机端故障和负荷中心故障进行仿真分析，验证了同步坐标下单机 PEBS法是电力系统暂态稳定分析的一种有效方法。关键词电力系统；暂态稳定；能量函数；信息熵-I-哈尔滨工业大学工学硕士学位论文AbstractAlong with the economic development and technical advancement, electricpower system will progress from regional power supply to large scaleinterconnected power system, which brings serious challenge to system stability.For this reason, the transient stability of power system is more important.This paper is based on transient energy and entropy function to analysistransient stability of power system. From system energy and single generatorenergy aspect, using information entropy function and PEBS analyzes transientstability of power system at COI and synchronism frame. The informationentropy function perfects further more, it become a new method to analyzetransient stability of power system.First, analyze transient stability, which is based on system energy function.The information entropy is structured by kinetic energy and potential energy, andanalyzing it to get the law for judging transient stability. Compare theinformation entropy at COI frame with it at synchronism frame to see whetherthe law is feasible. And check the effectiveness by analyzing simulation at COIframe. The result using information entropy is same to using SBS.Second, analyze transient stability, which is based on single generatorenergy function. Through analyzing the change of single generator transientenergy at different frames, the simulation indicates single entropy function iseffective to judging transient stability at COI frame and at synchronism frame; atthe same time researching the principles for choosing the critical generator,illuminate the meaning of critical generator, and discuss the differences betweensynchronism frame single generator PEBS and COI frame single generator PEBS.Analyzing simulation results of the faults which are at generator port and loadingcenter, proof single generator PEBS at synchronism frame is effective method todecide power system transient stability.Keywordspower system； transient stability； energy function； informationentropy-II-哈尔滨工业大学工学硕士学位论文目录摘要 . IAbstract . II第 1章绪论 .11.1课题背景 .11.2暂态稳定分析的主要方法 .21.3暂态能量法稳定分析的研究发展 .31.4信息熵理论在电力系统分析中的应用 .51.5本文的主要工作 .6第 2 章能量函数的构造和PEBS法 .72.1引言 .72.2暂态能量函数的构造 .72.2.1同步坐标下暂态能量函数的构造 .