扩展等面积准则(EEAC)的算法实现及仿真验证

摘要随着电力工业的飞速发展，电力系统规模日趋扩大，系统的传输容量逼近稳定极限，电网安全稳定裕度越来越小，因而电力系统暂态稳定研究具有重大意义。本次毕业设计首先介绍了逐步积分法(SBS)、直接法和扩展等面积准则(EEAC)这三种最广为研究的电力系统暂态稳定分析方法，通过将它们进行对比，突出了扩展等面积准则的优势，并着重介绍了EEAC理论体系的结构、原理及特点。其次，应用 EEAC 理论对设计的复杂情形单机无穷大系统进行极限参数计算，通过与逐步积分法求得结果对比，完成了仿真验证以及误差分析，证实了 EEAC 法兼具准确性和快速性的优势，并得出“对任一时变系统，总是可以用分段定常重新拟合的方法来进行稳定分析”这一结论。最后，通过对仿真结果的分析和探究，简单总结了时变因素对稳定分析的影响，并对此问题的深入研究提出了进一步的展望和计划。10046
关键词暂态稳定，逐步积分法(SBS)，直接法，扩展等面积准则(EEAC)，时变
因素 Title The Coding Realization and Simulation Verification
of   Extended Equal Area Criterion(EEAC)
Abstract
With the rapid development of power industry, the size of the power system
is increasingly expanding. And the transmission capacity of the system is
approaching the limit of stability. Margin of stability is getting smaller
and smaller, and thus of great significance to the research of the transient
stability of power system. This graduation project first introduced
step-by-step(SBS) integration method, the direct method and the Extended
Equal Area Criterion(EEAC), they are widely used for the study of power
system transient stability analysis(TSA). By contrast, highlights
advantage of the EEAC, and then focuses on the structure, principle and
characteristics of the EEAC. Secondly, the application of EEAC are used
to do limit parameter calculation on designed complex situation of on
machine infinite bus(OMIB) system. The obtained results compared with the
SBS method, the simulation and error analysis confirmed both the accuracy
and rapidity of the EEAC, and found out that “for any time varying system,
we can pide the transient process into some permanent segments and then
complete the transient analysis.” Finally, though the analysis and
exploration of the simulation results, briefly summarized the influence
of time-varying factors to stability analysis, and put forward outlook and
plans for deeper research.
Keywords    Transient Stability Analysis, Step-by-Step, Direct Method, Extended Equal Area Criterion, time-varying factor
目   次

符号及缩写 . 1
1   绪论 . 1
1.1   课题背景——电力系统稳定问题的概述    1
1.2 EEAC与直接法的比较    2
1.3   本文主要内容   4
2 EEAC方法内容    6
2.1 EEAC简介 . 6
2.2   三种EEAC算法的互补和协调 . 7
2.3   时变因素影响稳定评估的机理 8
3   仿真实现 . 10
3.1   仿真系统设计   10
3.2 EEAC法求取临界参数   11
3.3 SBS法求取临界参数 . 14
3.4   仿真结果    17
4   结果分析 . 23
4.1   仿真结果简要分析 . 23 扩展等面积准则(EEAC)的算法实现及仿真验证:http://www.751com.cn/zidonghua/lunwen_8956.html