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Development of Wide Area On-line Stability Monitoring System

广域在线稳定性监测系统的研制

基本信息

批准号：
11650289
负责人：
HIYAMA Takashi
金额：
$ 1.86万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

Due to the increasing size and complexity of electric power systems, and also owing to the high rate of growth of electric power demand, electric power systems are often operated in a lower stability margin, therefore, real time stability monitoring is becoming more important for the reliable power system operation. In this project, a FFT based real time stability monitoring has been proposed for the modal analysis of power system oscillations in the frequency domain. The proposed real time monitoring system is set up by using a personal computer with a DSP board, which has an AD conversion interface for the measurements of real power flows to identify oscillation modes. The real power signal is recorded in the memory on the DSP board through the AD conversion interface and a sequence of stored real power signal is utilized for the FFT analysis in real time on the DSP board.. The result of FFT analysis is passed to the workspace in the Matlab/Simulink environment for the visualization of the oscillation modes using color mapping to show the variation in real time. In addition, a fuzzy reasoning based decomposition of individual oscillation modes has been performed to extract individual modes included in the measured real power flows. To have better understanding of power system oscillations in the study system covering a wide area, a coherency analysis has been performed. All the programs have been developed in the Matlab/Simulink environment for the entire process of the real time modal analysis. The proposed system has been tested by using power flow signals on 500kV trunk lines measured at 500kV substations in the Kyushu Electric Power System.

随着电力系统规模的不断扩大和复杂性的不断提高，以及电力需求的快速增长，电力系统往往运行在较低的稳定裕度下，因此，真实的时间稳定性监测对于电力系统的可靠运行显得越来越重要。在本计画中，提出一种以快速傅立叶变换为基础的真实的时间稳定性监测方法，以在频域中进行电力系统振荡的模态分析。建议的真实的时间监测系统是通过使用一台个人计算机与DSP板，它具有AD转换接口的真实的潮流的测量，以识别振荡模式。通过AD转换接口将真实的功率信号记录在DSP板上的存储器中，并利用所存储的真实的功率信号序列在DSP板上进行真实的FFT分析。FFT分析的结果被传递到Matlab/Simulink环境中的工作空间，用于使用颜色映射来显示振荡模式的可视化，以显示真实的时间变化。此外，基于模糊推理的分解的个别振荡模式已被执行，以提取个别模式包括在测量的真实的功率流。为了更好地了解电力系统振荡的研究系统覆盖广泛的区域，已进行了一致性分析。所有程序均在Matlab/Simulink环境下开发完成，实现了对结构进行真实的实时模态分析的全过程。建议的系统已被测试，在九州电力系统的500 kV变电站测量的500 kV干线潮流信号。