摘要随着用电负荷的增加以及远距离大容量输电的发展,不仅带来功角稳定问题,也容易引起电压失稳。电压失稳往往发生在接近极限负荷时,当负荷突然增加相当小的数量,系统电压便会急剧下降甚至失稳。而计算系统中各节点的 PV(QV)曲线可以形象地显示电压安全性的两个重要参量负荷点的临界电压和极限功率,指示各负荷节点文持电压稳定性能力的强弱。自从连续潮流法提出以来,它在电力系统静态电压稳定性的研究方面有了广泛的应用,并将成为能量管理系统中的一个重要模块。本文以连续潮流的算法为核心,对其在电力系统电压稳定性的应用展开了深入而细致的研究,取得了良好的效果。对连续潮流原理的四大组成部分:预估、校正、参数化和步长控制进行了归纳总结。7898
关键词:电压稳定,延拓法,连续潮流,预估,校正
毕业设计说明书(论文)外文摘要
Title The power system voltage stability analysis based on the continuation power flow
Abstract
The development of the load growth and long distant large capacity transmission brings both angle stability problem and voltage instability. The voltage instability usually occurs when the load increases a little near to the limit of load, the voltage will drop sharply even lose stability. Calculation of PV(QV)curve of every node can indicate two important parameter critical voltage and power limit clearly. It can also show the ability of keeping voltage stability of every node. Since continuation power flow is proposed, it has been widely used in the static voltage stability studies of power system, and it will become an important module in the energy management system. In this paper, the core is the algorithm of continuation power flow. Deep and meticulous researches are made for the application of continuation power flow in the voltage stability of power system, and the result given is preferable. This paper summaries four components of continuation power flow: predictor, corrector, parametric and step control.
Keywords: Voltage stability, Continuation method, Continuation Power Flow, Estimate, Corrected
目 次
1 引言(或绪论)1
1.1 研究背景及意义1
1.2 电压稳定性研究综述1
1.3 连续潮流的研究现状及应用…5
1.4 本文的主要工作9
2 延拓算法10
2.1 牛顿-拉夫逊法的基本原理…10
2.2 延拓算法基本原理13
2.3 算例仿真15
3 连续潮流17
3.1 电力系统潮流方程17
3.2 牛顿-拉夫逊法潮流就算17
3.3 连续潮流的求解…22
3.4 算例分析26