公开(公告)号：US11946966B1

公开(公告)日：2024-04-02

申请号：US18171475

申请日：2023-02-20

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Ritwik Chowdhury ,  Jason Andrew Young ,  Jon Steinmetz ,  Rogerio Scharlach ,  Satish Samineni

IPC: G01R31/08 ,  G01R31/52

CPC classification number: G01R31/086 ,  G01R31/088 ,  G01R31/52

Abstract: Disclosed are systems and methods to determine a direction to a ground fault of an electrical generator or motor using a known steady-state standing error referenced to a positive-sequence voltage measurement to determine a system standing error and utilizing the system standing error to determine an operating current with anomalies attributable to a fault. A ground fault may be determined using zero-sequence voltage signals from the generator or motor installation. The operating current, along with the zero-sequence voltage, may be used to determine a direction to the fault. The generator or motor may be high-impedance grounded. The systems and methods further indicate the direction to a fault where multiple generators or motors are connected to a common bus.