公开(公告)号：US20210055332A1

公开(公告)日：2021-02-25

申请号：US16549774

申请日：2019-08-23

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Raymond W. Rice ,  Benjamin T. Rowland ,  James Mobley ,  Shankar V. Achanta

IPC: G01R19/15 ,  G01R19/155

Abstract: The present disclosure pertains to systems and methods for measuring electrical parameters in an electric power system. In one embodiment, a system may include a line-mounted wireless current sensor comprising a current monitoring subsystem to generate a current measurement of an alternating current flow through an electrical conductor. The line-mounted wireless current sensor may harvest power from the electrical conductor. A processing subsystem may generate a message comprising the current measurement, and the message may be transmitted at a synchronization point using a wireless communication subsystem. An intelligent electronic device (IED) may receive the message. The IED may further generate a voltage and generate a phasor based on the current measurement and the voltage measurement. A control action subsystem may implement a control action (e.g., selectively connecting or disconnecting a capacitor bank) based on the phasor.

公开(公告)号：US20240312688A1

公开(公告)日：2024-09-19

申请号：US18183710

申请日：2023-03-14

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Timothy M. Minteer ,  David Kenny ,  Johnny J. Moore ,  Raymond W. Rice ,  Benjamin T. Rowland ,  Lyssa W. Blood ,  Brett Taggart

IPC: H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/00

CPC classification number: H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/001

Abstract: A current transformer (CT) isolation clamp is mounted to a phase conductor and includes a step-down CT transformer and a passive isolation transformer. A three-phase power-harvesting sensor system includes a plurality of CT isolation clamps mounted to phase conductors in a three-phase power system. An electronics module is connected to the CT isolation clamps. The electronics module may include a sensing circuit to determine power characteristics of the three-phase power system based on the outputs of the CT isolation clamps. The electronics module may include a communication subsystem to transmit the determined power characteristics to local or remote devices. Additionally, the electronics module may include a power harvesting circuit to harvest power to operate the sensing circuit and the communication subsystem.