TY - JOUR
T1 - Fast Frequency-Domain Decomposition for Ambient Oscillation Monitoring
JF - IEEE Transactions on Power Delivery
Y1 - 2015/02//
SP - 1
EP - 1
A1 - Khalilinia, Hamed
A1 - Zhang, Lu
A1 - Venkatasubramanian, Vaithianathan
KW - AA13-004
KW - AARD
KW - CERTS
KW - RTGRM
AB - This paper proposes a multidimensional ambient oscillation monitoring algorithm denoted Fast Frequency Domain Decomposition (FFDD). Based on a new theoretical result, the algorithm is offered as an improvement over previously proposed Frequency Domain Decomposition (FDD) in that FFDD does not require time-consuming Singular Value Decomposition (SVD) and it does not require cross spectrum estimates. FFDD is useful for fast real-time ambient modal estimation of large number of synchrophasor measurements. Algorithm is tested on an archived event data from a real power system.
JO - IEEE Trans. Power Delivery
DO - 10.1109/TPWRD.2015.2394403
ER -
TY - JOUR
T1 - Fast SVD Computations for Synchrophasor Algorithms
JF - IEEE Transactions on Power Systems
Y1 - 2015/03//
SP - 1
EP - 2
A1 - Wu, Tianying
A1 - S. Arash Nezam Sarmadi
A1 - Venkatasubramanian, Vaithianathan
A1 - Pothen, Alex
A1 - Kalyanaraman, Ananth
KW - AA13-004
AB - Many singular value decomposition (SVD) problems in power system computations require only a few largest singular values of a large-scale matrix for the analysis. This letter introduces two fast SVD approaches recently developed in other domains to power systems for speeding up phasor measurement unit (PMU) based online applications. The first method is a randomized SVD algorithm that accelerates computation by introducing a low-rank approximation of a given matrix through randomness. The second method is the augmented Lanczos bidiagonalization, an iterative Krylov subspace technique that computes sequences of projections of a given matrix onto low-dimensional subspaces. Both approaches are illustrated on SVD evaluation within an ambient oscillation monitoring algorithm, namely stochastic subspace identification (SSI).
JO - IEEE Trans. Power Syst.
DO - 10.1109/TPWRS.2015.2412679
ER -