DocumentCode :
3288996
Title :
Electromechanical Wave Green´s Function Estimation from Ambient Electrical Grid Frequency Noise
Author :
Backhaus, Scott ; Liu, Yilu
Author_Institution :
Mater. Phys. & Applic. Div., Los Alamos Nat. Lab., Los Alamos, NM, USA
fYear :
2012
fDate :
4-7 Jan. 2012
Firstpage :
2054
Lastpage :
2061
Abstract :
Many electrical grid transients can be described by the propagation of electromechanical (EM) waves that couple oscillations of power flows over transmission lines and the inertia of synchronous generators. These EM waves can take several forms: large-scale standing waves forming inter-area modes, localized oscillations of single or multi-machine modes, or traveling waves that spread quasi-circularly from major grid disturbances. The propagation speed and damping of these EM waves are potentially a powerful tool for assessing grid stability, e.g. small signal or rotor angle stability, however, EM wave properties have been mostly extracted from post-event analysis of major grid disturbances. Using a small set of data from the FNET sensor network, we show how the spatially resolved Green´s function for EM wave propagation can be extracted from ambient frequency noise without the need for a major disturbance. If applied to an entire interconnection, an EM-wave Green´s function map will enable a model-independent method of predicting the propagation of grid disturbances and assessing stability.
Keywords :
Green´s function methods; electromagnetic wave propagation; power grids; power system transients; synchronous generators; EM wave properties; FNET sensor network; ambient electrical grid frequency noise; ambient frequency noise; damping; electrical grid transients; electromechanical wave Green´s function estimation; electromechanical wave propagation; grid disturbances; grid stability; inter-area modes; large-scale standing waves; localized oscillations; model-independent method; multimachine modes; post-event analysis; power flows; propagation speed; rotor angle stability; small signal stability; synchronous generators; transmission lines; traveling waves; Correlation; Frequency estimation; Generators; Noise; Receivers; Time frequency analysis; Transient analysis; Electromechanical waves;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
System Science (HICSS), 2012 45th Hawaii International Conference on
Conference_Location :
Maui, HI
ISSN :
1530-1605
Print_ISBN :
978-1-4577-1925-7
Electronic_ISBN :
1530-1605
Type :
conf
DOI :
10.1109/HICSS.2012.239
Filename :
6149042
Link To Document :
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