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Numerical Method to Analyze the Nonlinear Dynamical Structure of Multi-machine Power System

多机电力系统非线性动力结构分析的数值方法

基本信息

批准号：
12650277
负责人：
MITANI Yasunori
金额：
$ 2.3万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650277/
关键词：
power system multi-machine system power system stability nonlinear system periodic orbit excitation system 安定度

项目摘要

Power system is a large scale nonlinear dynamic system. The transient stability analysis of power system is an example associated with the area of the nonlinear system analysis, where the emphasis has been placed on the separatrix of second-order dynamics. The purpose of this research is to develop a numerical analyzing method for the nonlinear dynamics of multi-machine power system using Hopf bifurcation theory.It is a recent trend of power systems to open the market, where various kinds of power producers are expected to join the power business. In the circumstances, power transmission owners look for an economical operation, which is possibly near the stability limit. Thus, the nonlinear system analysis becomes an important issue in the system operation.In this study a method to analyze the nonlinear structure of multi-machine power system with longitudinal interconnections. Nonlinear analysis for a high order system is getting much difficult as the order increases. Therefore, a numerical method based on the swing data obtained from the power system, is developed. A long term power swing observed in the West Japan power system is analyzed by the proposed method and a stability boundary created by the nonlinear periodic orbit is detected. The effect of the generator excitation system is also inspected.

电力系统是一个大规模的非线性动态系统。电力系统暂态稳定性分析是与非线性系统分析领域相关的一个例子，其中重点放在二阶动力学的分界线上。本研究的目的是开发一种利用Hopf分岔理论对多机电力系统非线性动力学进行数值分析的方法。开放市场是电力系统近年来的发展趋势，各类电力生产商都有望加入电力行业。在这种情况下，输电业主寻求一种可能接近稳定极限的经济运行方式。因此,非线性系统分析成为系统运行中的一个重要问题。本文研究了一种纵向互联的多机电力系统非线性结构分析方法。随着阶数的增加，高阶系统的非线性分析变得越来越困难。因此，开发了一种基于从电力系统获得的摆动数据的数值方法。通过所提出的方法分析了在日本西部电力系统中观测到的长期功率摆动，并检测了非线性周期轨道创建的稳定边界。还检查了发电机励磁系统的效果。