Title :
The time skew problem in PMU measurements
Author :
Qing Zhang ; Vittal, V. ; Heydt, G. ; Chakhchoukh, Y. ; Logic, N. ; Sturgill, S.
Author_Institution :
Dept. of Electr., Comput. & Energy Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
In this paper, the time skew problem observed in synchronized phasor measurement unit (PMU) measurements is illustrated and analyzed. The term `time skew´ is used to describe the faulty sychronization of measurements from different PMUs which are expected to be synchronized based on the time stamps. The origin of the time skew is presented and a practical example is provided to depict the time skew existing in actual PMU measurements. A Kalman filter model is proposed to compensate for the time skew error.
Keywords :
Kalman filters; phasor measurement; power system faults; Kalman filter model; PMU measurements; faulty sychronization; synchronized PMU; synchronized phasor measurement unit; time skew error; time skew problem; Clocks; Kalman filters; Phase measurement; Phasor measurement units; Synchronization; Voltage measurement; Kalman filter; phasor measurement units; time skew;
Conference_Titel :
Power and Energy Society General Meeting, 2012 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-2727-5
Electronic_ISBN :
1944-9925
DOI :
10.1109/PESGM.2012.6345142
