公开(公告)号：WO2021146376A1

公开(公告)日：2021-07-22

申请号：PCT/US2021/013367

申请日：2021-01-14

Applicant: UNIVERSITY OF TENNESSEE RESEARCH FOUNDATION ,  UT-BATTELLE (ORNL)

Inventor： ZHAN, Lingwei ,  XIAO, Bailu ,  YIN, He ,  LI, Fuhua ,  YAO, Wenxuan ,  LI, Zhi ,  KING, Thomas ,  LIU, Yilu

IPC: G01R23/16 ,  G01R23/12 ,  G01R23/06 ,  G01R29/02 ,  G01R23/02

Abstract: Respective phasor values are recursively computed from respective ones of a series of signal samples for a node of a power system such that each phasor value is computed from a previously computed phasor value. Frequency values are recursively computed from the phasor values for respective ones of the signal samples. Recursive computing of frequency values may include computing respective phase angle values from respective ones of the phasor values, recursively computing coefficient values for a polynomial that fits the phase angle values, and recursively computing the frequency values from the coefficient values. The samples may be generated at a sampling rate and the phasor values and the frequency values may be produced at a rate that is the same as the sampling rate. Embodiments may provide methods, apparatus and computer readable media that implement such operations.