TY - GEN
T1 - State estimation with consideration of PMU phase mismatch for smart grids
AU - Yang, Peng
AU - Tan, Zhao
AU - Wiesel, Ami
AU - Nehorai, Arye
PY - 2013
Y1 - 2013
N2 - Phasor measurement units (PMUs) are time synchronized sensors for power system state estimation. Despite their promising advantages, large scale deployment of PMUs is still limited. One of the reasons is the high cost of their exact synchronization. In this paper, we consider the use of cheaper and less accurately synchronized PMUs, but compensate for these imperfections via signal processing methods. We introduce a statistical model for power state estimation using these impaired units. We then derive an alternating minimization technique and a parallel Kalman filter for static and dynamic estimation, respectively. Numerical examples demonstrate the improvement in estimation accuracy of our algorithm compared with traditional algorithms when phase mismatch is present. Our results suggest that the phase mismatches can be largely compensated as long as there is a sufficient number of PMUs and the delays are small.
AB - Phasor measurement units (PMUs) are time synchronized sensors for power system state estimation. Despite their promising advantages, large scale deployment of PMUs is still limited. One of the reasons is the high cost of their exact synchronization. In this paper, we consider the use of cheaper and less accurately synchronized PMUs, but compensate for these imperfections via signal processing methods. We introduce a statistical model for power state estimation using these impaired units. We then derive an alternating minimization technique and a parallel Kalman filter for static and dynamic estimation, respectively. Numerical examples demonstrate the improvement in estimation accuracy of our algorithm compared with traditional algorithms when phase mismatch is present. Our results suggest that the phase mismatches can be largely compensated as long as there is a sufficient number of PMUs and the delays are small.
UR - http://www.scopus.com/inward/record.url?scp=84876905211&partnerID=8YFLogxK
U2 - 10.1109/ISGT.2013.6497833
DO - 10.1109/ISGT.2013.6497833
M3 - Conference contribution
AN - SCOPUS:84876905211
SN - 9781467348942
T3 - 2013 IEEE PES Innovative Smart Grid Technologies Conference, ISGT 2013
BT - 2013 IEEE PES Innovative Smart Grid Technologies Conference, ISGT 2013
T2 - 2013 IEEE PES Innovative Smart Grid Technologies Conference, ISGT 2013
Y2 - 24 February 2013 through 27 February 2013
ER -