公开(公告)号：US11973803B2

公开(公告)日：2024-04-30

申请号：US17328321

申请日：2021-05-24

Applicant: Tsinghua University

Inventor： Qinglai Guo ,  Hongbin Sun ,  Luo Xu ,  Wenchuan Wu

IPC: H04L9/40

CPC classification number: H04L63/20 ,  H04L63/1416 ,  H04L63/168

Abstract: The present disclosure provides a stability criterion for time-delay of cyber-physical power systems under distributed control, which relates to a field of cyber-physical power systems technologies. The method first establishes an cyber side model of the cyber-physical power systems under distributed control and a physical power grid model of the cyber-physical power systems under distributed control respectively; then establishes simultaneous equations of the cyber side model and the physical power grid model to establish an unified differential algebraic equation model of the cyber-physical power systems under distributed control, so as to obtain a time-delay characteristic equation expression of the cyber-physical power systems under distributed control; determines a time-delay of each node, and solving the time-delay characteristic equation expression to obtain a maximum characteristic root, and performing the stability criterion for the time-delay of the cyber-physical power systems under distributed control according to a real part of the maximum characteristic root.

公开(公告)号：US11513485B2

公开(公告)日：2022-11-29

申请号：US17328270

申请日：2021-05-24

Applicant: Tsinghua University

Inventor： Qinglai Guo ,  Hongbin Sun ,  Luo Xu ,  Wenchuan Wu

IPC: G05B17/02

Abstract: The present disclosure provides a stable region determining method for distributed cyber-physical power systems with multiple time delays, including: first establishing a state space expression of the cyber-physical power systems under distributed control with multiple time delays; converting the state space expression to frequency domain through Laplace transform to obtain a characteristic equation for multiple time delays of the cyber-physical power systems under distributed control, and establishing a marginally stable characteristic equation with unified time delay to obtain a marginally stable characteristic equation for multiple time delays of the cyber-physical power systems under distributed control with unified time delay; in each time delay direction, solving a stable boundary for time delay of the cyber-physical power systems under distributed control; connecting the stable boundaries for time delays in all time delay directions, and generating a stable domain for time delays of the cyber-physical power systems under distributed control.