System Development for on-Line Evaluation of Power Systems Through a Non-Lure Type Lyapunov Function

通过非诱饵型李亚普诺夫函数进行电力系统在线评估的系统开发

基本信息

批准号：
63550219
负责人：
MIYAGI Hayao
金额：
$ 1.47万
依托单位：
University of the Ryukyus
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

1. The flux decay causes a product-type nonlinearity in the formulation of the electrical power output, and the conventional Lure-type Lyapunov function can not be well adapted for such a product-type nonlinear system. This report presents a way of constructing extended Lyapunov function for the product-type nonlinear system.2. The report proposes a method of analyzing robust stability of nonlinear system through the direct method of Lyapunov, in order to cope with both ambiguity of the system parameters due to successive variation of power system loads and estimation errors in the system identifications.3. The main factor which affects on the power system stability is synchronous machine. Then, in this report, methods are presented for analyzing hunting and pulling-into-step phenomena and improving the synchronization of synchronous machines, utilizing Lyapunov functions.4. A useful method for improving stability of power system is on-off control utilizing damping resistor. This report gives a way of deciding optimal on-off timing of the resistor, using Lyapunov function.5. In order to realize the on-line evaluating system for power system stability, the state variable such as phase angle of generator must be measured. This research has made a trial production of a measuring device of phase angle of generator.6. A microcomputer-based on-line transient stability evaluation system for power systems using a non-Lure type Lyapunov function has been accomplished in the report. The Lyapunov function is constructed by the Lagrange-Charpit method. A software for controlling power system has also been developed. The experimental results show that this evaluation system can act satisfactorily for controlling stability of power system.

1。通量衰减在电力输出的配方中导致产品型非线性，并且传统的诱饵型Lyapunov函数无法很好地适应此类产品类型的非线性系统。该报告提出了一种为产品类型非线性系统构建扩展Lyapunov功能的方法2。该报告提出了一种通过Lyapunov的直接方法来分析非线性系统稳健稳定性的方法，以应对系统识别中功率系统负载和估计误差的连续变化而导致系统参数的歧义。3。影响电力系统稳定性的主要因素是同步机。然后，在本报告中，提出了用于分析狩猎和拉动 - 步骤现象的方法，并利用Lyapunov函数改善同步机的同步。4。提高电力系统稳定性的一种有用方法是利用阻尼电阻来开关控制。该报告提供了一种使用Lyapunov函数来确定电阻最佳启用时间的方法。5。为了实现电力系统稳定性的在线评估系统，必须测量诸如发电机相位角的状态变量。这项研究使生成器相位角的测量设备进行了试验。6。报告中已经完成了基于微型计算机的电源瞬态稳定性评估系统，用于使用非诱因类型Lyapunov函数的功率系统。 Lyapunov函数是通过Lagrange-charpit方法构建的。还开发了用于控制电源系统的软件。实验结果表明，该评估系统可以令人满意地控制电力系统的稳定性。