基于TLS-ESPRIT的低频振荡负荷参与程度量化分析  

TLS-ESPRIT Based Quantitative Analysis on Participating Degree of Load in Low-Frequency Oscillation

作　　者：徐遐龄 林涛[2] 张帆[2] 李强[2] 

机构地区：[1]华中电力调控分中心,湖北省武汉市430077 [2]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2012年第11期109-113,共5页Power System Technology

基　　金：国家自然科学基金项目(50707021);国家电网公司科技项目(KJ2010-0604-51)~~

摘　　要：为研究负荷侧引起的低频振荡,对负荷在低频振荡中的参与程度进行了量化分析和计算,通过引入负荷灵敏度作为该量化指标,分析了其影响振荡模态的方式。为避免大区电网在线计算特征值计算量大的困难,采用TLS-ESPRIT辨识计算负荷的功率振荡增量分布(oscillatory active powerincrement distribution,OAPID),以间接反映负荷灵敏度和负荷参与振荡程度。4机2区域系统和实际电网的仿真研究,验证了所述方法的有效性。To research low-frequency oscillation caused by load,the quantitative analysis and calculation of participating degree of load in low-frequency oscillation are performed,and by means of introducing load sensitivity as quantization index the way by which the load sensitivity influences on oscillation mode is analyzed.To avoid too heavy calculation burden during the online eigenvalue computation of large-scale power grid,the total least squares-estimation of signal parameters via rotational invariance techniques（TLS-ESPRIT） is utilized to identify the oscillatory active power increment distribution（OAPID） of load to indirectly reflect load sensitivity and participating degree of load in the oscillation.The availability of the proposed method is verified by simulation results of a 4-machine 2-area system and actual power grid.

关 键 词：低频振荡 负荷 负荷灵敏度 功率振荡增量分布 

分 类 号：TM72[电气工程—电力系统及自动化]