| 引用本文: | 刘宪林,杜晓勇,田云峰,赵海廷.Matlab在水轮机模型辨识中的应用[J].电力自动化设备,2007,27(12):85-87,92 |
| .Application of Matlab in hydroturbine model identification[J].Electric Power Automation Equipment,2007,27(12):85-87,92 |
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| 摘要: |
| 介绍Matlab系统辨识工具箱的功能,对Matlab在水轮机模型辨识中的应用进行研究。结合抽水蓄能电站现场试验,基于并网发电运行、负荷随机波动激励下的200MW机组实测数据,运用Matlab系统辨识工具箱实现了数据预处理和模型辨识计算,得出了复杂输水系统下水轮机输出力矩与导叶开度间的传递函数模型,并采用先验知识检验、阶跃响应检验和残差白噪声检验3种方法对其进行检验。结果表明,辨识模型具有非最小相位系统特征,连续阶跃响应的现场实测结果与采用辨识模型的仿真结果在响应的各个阶段均相当一致,模型残差为具有99%置信度的白噪声,所得模型可靠。 |
| 关键词: Matlab,模型辨识,水轮机,模型检验 |
| DOI： |
| 分类号:TM312 |
| 基金项目: |
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| Application of Matlab in hydroturbine model identification |
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LIU Xian-lin DU Xiao-yong TIAN Yun-feng ZHAO Hai-ting
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| Abstract: |
| The function of Matlab system identification toolbox is introduced and its application in hydroturbine model identification is studied.Combined with site experiments in a pumped storage power station and based on the measured data of a 200 MW hydroturbine,connected to power grid and excited by random load fluctuation,the data pre-processing and model identification are carried out using Matlab system identification toolbox.The transfer function model between the output torque of hydroturbine and the openness of guide vanes under complicated work conditions is identified,which is validated by three methods:prior knowledge validation,step disturbance validation and self relation function validation.Results show that,the identified model has the minimum phase system behavior and reliable,its simulative data of continuous step response are consistent with the measured data in various stages and its residuals are white noise with 99 % reliability. |
| Key words: Matlab,model identification,hydroturbine,model validation |
