Title :
Initial results in power system identification from injected probing signals using a subspace method
Author :
Zhou, Ning ; Pierre, John ; Hauer, John
Author_Institution :
Pacific Northwest Nat. Lab., Richland, WA
Abstract :
Summary form only given. In this paper, the authors use the numerical algorithm for subspace state space system identification (N4SID) to extract dynamic parameters from phasor measurements collected on the western North American Power Grid. The data were obtained during tests on June 7, 2000, and they represent wide area response to several kinds of probing signals including low-level pseudo-random noise (LLPRN) and single-mode square wave (SMSW) injected at the Celilo terminal of the Pacific HVDC Intertie (PDCI). An identified model is validated using a cross validation method. Also, the obtained electromechanical modes are compared with the results from Prony analysis of a ringdown and with signal analysis of ambient data measured under similar operating conditions. The consistent results show that methods in this class can be highly effective even when the probing signal is small.
Keywords :
power grids; power system identification; state-space methods; Celilo terminal; N4SID numerical algorithm; Pacific HVDC intertie; Prony analysis; cross validation method; low-level pseudo-random noise; phasor measurements; power system identification; probing signals; single-mode square wave; state space system identification; subspace method; western North American Power Grid; Data mining; Power grids; Power measurement; Power system dynamics; Power system measurements; Power systems; Signal analysis; Signal processing; State-space methods; System identification;
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2008.4596290
