电力系统自动化Issue(5)：32-37,6.DOI:10.7500/AEPS20150528003
参数可观测性分析及其在电力负荷模型中的应用
Parameter Observability Analysis and Its Application to Power Load Model
摘要
Abstract
The concept of parameter observability is given,which indicates that if the power spectrum of input excitation can cover the oscillation frequency of the system,then the frequency can be observed via the output.So the corresponding modality and parameters can be identified.The power spectral sensitivity based on parameters is proposed to quantitatively analyze the parameter observability.Parameters are identified by minimizing the sum of square error between the measured and the calculated values of power spectrum.By taking a second-order system as an example,the factors of parameter observability are analyzed upon input excitation,the amplitude-frequency characteristic of system,especially the system damping.Finally,the frequency-domain characteristics of the power load model are studied,and the correctness of the concept proposed is verified by parameter identification using two different kinds of excitation signals.关键词
参数辨识/参数可观测性/电力负荷模型/功率谱灵敏度Key words
parameter identification/parameter observability/power load model/power spectral sensitivity引用本文复制引用
鞠平,张正利,潘学萍,陈谦..参数可观测性分析及其在电力负荷模型中的应用[J].电力系统自动化,2016,(5):32-37,6.基金项目
This work is supported by National Natural Science Foundation of China(No.51137002,No.51190102,No.51377046) （No.51137002,No.51190102,No.51377046）
