Title :
On Three-Phase State Estimation in the Presence of GPS-Synchronized Phasor Measurements
Author :
Stefopoulos, George K. ; Alaileh, Ramiz H. ; Cokkinides, George J. ; MelioPoulos, A. P Sakis
Author_Institution :
Georgia Inst. of Technol., Atlanta
fDate :
Sept. 30 2007-Oct. 2 2007
Abstract :
The paper presents a comparative study among several state estimation formulations, in the presence of GPS-synchronized phasor measurements. The presented approach is based on a hybrid state estimation formulation, which uses both traditional SCADA measurements as well as phasor measurements. Three different formulations are presented that use: (a) Cartesian representation of state and measurements, (b) Cartesian representation of state and measurements with the addition of pseudomeasurements, and (c) polar representation of state and measurements. A physically-based three-phase model of a power system is utilized. The three formulations are compared in terms of error and confidence level analysis, via a simple introductory example.
Keywords :
Global Positioning System; SCADA systems; error analysis; phase measurement; power system measurement; power system state estimation; Cartesian representation; GPS-synchronized phasor measurements; SCADA measurements; confidence level analysis; error analysis; hybrid state estimation formulation; physically-based three-phase model; three-phase state estimation; Admittance measurement; Electric variables measurement; Jacobian matrices; Phase measurement; Power measurement; Power system measurements; Power system modeling; Q measurement; State estimation; Voltage; GPS-synchronized phasor measurements; Hybrid state estimator; State estimation;
Conference_Titel :
Power Symposium, 2007. NAPS '07. 39th North American
Conference_Location :
Las Cruces, NM
Print_ISBN :
978-1-4244-1726-1
Electronic_ISBN :
978-1-4244-1726-1
DOI :
10.1109/NAPS.2007.4402342
