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Fundamental Research on Transient Behavior of Power system and Criterion for Detecting Onset of Instability

电力系统暂态行为及失稳发生判据的基础研究

基本信息

批准号：
09650441
负责人：
UEDA Yoshisuke
金额：
$ 2.11万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650441/
关键词：
Power System Transient stability Synchronization between power system Attractor basin Hybrid system Discrete Power electronics Nonlinear phenomena 過度安定度電圧安定問題同期機磁気飽和系統高調波

项目摘要

1. Studies on Various Stabilities of Power SystemThe dynamical behavior of power system is described by higher order nonlinear differential equations. Therefore it is difficult to realize the onset mechanism of several phenomena in power system because they are depending on the grobal structure of its dynamical system. The obtained results are as follows ;(a) Transient Phenomena : Relating to the grobal structure of attractor basin which insures the stabilization of power system behavior, the unstable minimal set which governs the boundary of the basin are numerically obtained. Then the attractor basins of eternal asynchronization which covers the basin of stable attractor are classified numerically.(b) Swing Phenomena Between Power System : As for the synchronization, the swing phenomena and the asynchronization between power systems, it is shown that the initial value space is possibly classified depending on the convergence numerically. The structure of the attractor basins is shown to have an important relation to the criterion of the stability.2. Studies on Stability Based on Power Electronics Apparatus in Power SystemVarious power electronics apparatuses are intended to control power systems. However, the apparatuses are inevitable to avoid the switching nonlinearity. The following results are obtained ;(a) Criterion of Switching Instability : Self excited power electronics circuits show the switching instability caused by the load and setup conditions. The research is performed to make the instability clear experimentally and numerically. The modified Lyapunov exponent can also be used in these circuits.(b) Stability in Continuous-Discrete Hybrid System : The theoretical studies are performed to introduce the Hybrid System Theory to the analysis of the power system with switching elements.

1.电力系统各种稳定性的研究电力系统的动态行为由高阶非线性微分方程描述。因此，电力系统中某些现象的发生机理是很难认识的，因为它们依赖于动力系统的宏观结构。（a）暂态现象：针对保证电力系统行为稳定的吸引子域的全局结构，数值求解了控制吸引子域边界的不稳定极小集。然后对覆盖稳定吸引子域的永恒稳定化吸引子域进行了数值分类。(b)电力系统间的摆动现象：对于电力系统间的同步、摆动现象和振荡，本文从数值上证明了初值空间可以根据收敛性进行分类。吸引子盆的结构与稳定性判据有着重要的关系.基于电力电子装置的电力系统稳定性研究各种电力电子装置都是用来控制电力系统的。然而，器件不可避免地要避免开关非线性。得到了以下结果：（a）开关不稳定性判据：自激电力电子电路的开关不稳定性是由负载和启动条件引起的。通过实验和数值模拟的方法研究了这种不稳定性。修正的李雅普诺夫指数也可以用于这些电路。(b)连续-离散混杂系统的稳定性：理论研究将混杂系统理论引入含开关元件电力系统的分析。