公开(公告)号：US20250158401A1

公开(公告)日：2025-05-15

申请号：US18945578

申请日：2024-11-13

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hongchun Shu ,  Yue Dai ,  Cong Li ,  Yutao Tang ,  Hongfang Zhao ,  Yiming Han ,  Kaiqing Tian ,  Jun Dong

IPC: H02J3/00 ,  G01R31/52 ,  H02J3/38 ,  H02J13/00

Abstract: This invention relates to a method and system for adaptive reclosing of single-phase AC transmission lines in wind power systems. The invention utilizes single-ended electrical quantity to determine the type of fault. After a fault occurs, a signal acquisition device is used to sample the voltage of the fault phase. The obtained voltage is subjected to short-time Fourier transform to extract the amplitude of the fundamental frequency voltage component, and then processed with differential amplification to construct a fault nature identification criterion. Combined with a sliding time window for fault identification, if it is identified as a permanent fault, the reclosing device is locked out; if it is identified as a transient fault, the fault disappearance time is calculated to determine the reclosing time and output the closing signal. This invention is designed for adaptive reclosing after a circuit breaker trips in wind power AC transmission lines.