电力系统暂态稳定直接法的分析-电力系统及其自动化专业毕业论文.docx

太原理工大学硕士研究生学位论文
作双机等值动能校正以进一步改善精度。在此基础上讨论了UEP法暂稳分析的步骤,给出了算例,还讨论了UEP 法出现误差的一般原因。
建立了直接法的等值双机和等值三机模型。所建模型具有较强的通用性和灵活性。从提高计算速度考虑,只对故障点附近地区采用较详细的元件模型,而其它地区则采用简化模型。这样不仅可以满足工程精度要求,而且把迭代计算限制在故障子块,提高计算速度,有利于在计算中快速计算持续故障轨迹及作稳定判别。网络方程采用分解聚合法。在求出临界切除角度以后,采用分段计算法求解临界切除时间。
在所建模型的基础上,编制了运用UEP法和双机等值法的计算程序。并应用此程序对推荐的系统图(22节点) 进行了试算,取得了较满意的结果。
关键词:暂态稳定,故障分析,UEP法,等值双机模型, 等值三机模型
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太原理上火学硕士研究生学位论文
USING DIRECT METHOD TO ANALYSiS
POWER SYSTEM TRANSIENT
STABILITY
ABSTRACT
Stability wreck iS the most serious accident in prevent stability wreck,direct method as a quick,precision stability analysis method,many countries have made a great deal of research on it. There are two trends in direct stability analysis:one is to improve on existent model,seeking more nicety,faster and more practicability other is to find out new theory and method to analysis online stability.
The specialty of direct method is that it analysis the
stability frOm the point of energetic rather than by means
■
of calculate the system movement
strongpoint of direct method is its quick speed and it can also quantify the degree of we can use it as an on—line tool to analysis dynamic security and an out—line security analysis tool for large quantity
scanning.
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太原理工大学硕十研究生学位论文
I his thesis Includes such contents:
At first,the thesis systematically reviews and summarizes the development state of the direct method inside and outside the bines with single machlne—infinite thesis presents the process of transient-stable analysis by using direct method:the definition of transient energetic function and its calculation,how to fixes the critical energ y1 and it also gives the standardized margin degree of pares the direct method with equal—area criterion and explicates their uniformity.
This thesis Introduces the math modeI of direct transient-stable analysis method under system synchronism coordinates and gives the conception o