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.

由于电力系统的规模和复杂性不断增加，同时由于电力需求的高速增长，电力系统往往运行在较低的稳定裕度下，因此实时稳定性监测对于电力系统的运行变得越来越重要。电力系统可靠运行。在该项目中，提出了基于 FFT 的实时稳定性监测，用于频域电力系统振荡的模态分析。所提出的实时监测系统是通过使用带有 DSP 板的个人计算机建立的，该计算机具有 AD 转换接口，用于测量实际功率流以识别振荡模式。有功功率信号通过AD转换接口记录在DSP板上的存储器中，并利用存储的有功功率信号序列在DSP板上实时进行FFT分析。FFT分析的结果传递给Matlab/Simulink 环境中的工作区可使用颜色映射来可视化振荡模式，以实时显示变化。此外，还执行了基于模糊推理的各个振荡模式的分解，以提取包含在测量的有功功率流中的各个模式。为了更好地理解覆盖广泛区域的研究系统中的电力系统振荡，进行了相干性分析。所有程序均在Matlab/Simulink环境下开发，用于实时模态分析的整个过程。该系统已通过在九州电力系统 500kV 变电站测量的 500kV 干线上的潮流信号进行了测试。