-
公开(公告)号：US11275101B2
公开(公告)日：2022-03-15
申请号：US16592154
申请日：2019-10-03
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： James Mobley
Abstract: The present disclosure relates to spectral analysis in wireless current sensors. For example, a wireless current sensor (WCS) includes current transformer windings that harvest electrical energy from a power line and allow the WCS to obtain current measurements of the power line. The WCS includes a processor that obtains the current measurements of the power line via the current transformer windings. The processor generates a frequency domain representation of the current on the power line using the current measurements. The processor sends a wireless signal indicating results from the frequency domain representation to an intelligent electronic device (IED) that monitors the power line to allow the TED to analyze the results for anomalies.
-
2.发明授权公开(公告)号：US11549996B1
公开(公告)日：2023-01-10
申请号：US17454172
申请日：2021-11-09
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Kei Hao , Raymond W. Rice , James Mobley
IPC: G01R31/40 , G01R31/3842 , H02H7/16
Abstract: The present disclosure relates to a capacitor bank controller that automatically determines the size of a capacitor bank using wireless current sensors. The capacitor bank controller determines a first capacitor bank size estimate using voltage and current measurements from when the capacitor bank is open and when the capacitor bank is closed a first time. The capacitor bank controller determines a second capacitor bank size estimate by using voltage measurements and current measurements from when the capacitor bank is open and when the capacitor bank is closed a second time. The capacitor bank controller determines a filtered capacitor bank size estimate based on the first capacitor bank estimate and the second capacitor bank estimate and controls operation of the capacitor bank based on the filtered capacitor bank size estimate.
-
公开(公告)号：US20210109147A1
公开(公告)日：2021-04-15
申请号：US16688168
申请日：2019-11-19
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Normann Fischer , Raymond W. Rice , Ravindra P. Mulpuri , James Mobley
IPC: G01R31/02 , G01R31/3185
Abstract: The present disclosure pertains to systems and methods for monitoring and protecting an electric power system. In one embodiment, a system may comprise line-mounted wireless current transformers to measure at least one parameter of an alternating current (AC), receive a synchronization signal at which to measure the AC, and send a message comprising the measured AC. The system may also comprise an intelligent electronic device (IED) to send the synchronization signal to and receive the messages from the line-mount wireless current transformers, determine whether a high-impedance fault (HiZ) exists between the line-mounted wireless current transformers, and implement a control action based on the existence of the HiZ fault.
-
公开(公告)号：US11105834B2
公开(公告)日：2021-08-31
申请号：US16576302
申请日：2019-09-19
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： James Mobley , Raymond W. Rice
Abstract: The present disclosure pertains to a line-powered current measurement system to mount to an electrical conductor and related methods. In one embodiment, a system may comprise a current transformer to electrically couple to an electrical conductor and to generate a secondary current proportional to a primary current in the conductor. A power harvesting subsystem may harvest power from the secondary current in a first configuration. A switching subsystem may transition the line-powered current measurement device between the first configuration and a second configuration, in which a current measurement subsystem generates a measurement of the secondary current. The switching subsystem may provide the secondary current to the power harvesting subsystem in the first configuration and may bypasses the power harvesting subsystem in the second configuration. A communication subsystem may transmit the measurement of the secondary current to a receiver device.
-
公开(公告)号：US10962608B1
公开(公告)日：2021-03-30
申请号：US16688168
申请日：2019-11-19
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Normann Fischer , Raymond W. Rice , Ravindra P. Mulpuri , James Mobley
IPC: G01R31/50 , G01R31/62 , G01R31/3185
Abstract: The present disclosure pertains to systems and methods for monitoring and protecting an electric power system. In one embodiment, a system may comprise line-mounted wireless current transformers to measure at least one parameter of an alternating current (AC), receive a synchronization signal at which to measure the AC, and send a message comprising the measured AC. The system may also comprise an intelligent electronic device (IED) to send the synchronization signal to and receive the messages from the line-mount wireless current transformers, determine whether a high-impedance fault (HiZ) exists between the line-mounted wireless current transformers, and implement a control action based on the existence of the HiZ fault.
-
Patent Agency Ranking
公开(公告)号：US11031812B1
公开(公告)日：2021-06-08
申请号：US17144283
申请日：2021-01-08
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Joe Baylon , Timothy M. Minteer , David Kenny , James Mobley , Johnny J. Moore , Raymond W. Rice , Naiden K. Spasov , Eric M. Sawyer
Abstract: The present disclosure relates to powering distributed sensors used to monitor electrical and/or environmental conditions and to powering other equipment associated with electric power systems. In one embodiment, a system may be used to mount a sensor in proximity to a reference conductor. An electric field power conversion subsystem may generate a usable electric potential from an electric field created by the electric power system and existing between the reference conductor and another conductor (e.g., another phase conductor, a ground conductor). The sensor powered by the usable electric potential may provide a measurement of a condition associated with the electric power system. A communication subsystem powered by the usable electric potential may communicate the measurement of the condition to a monitoring system.
-
公开(公告)号：US20210055333A1
公开(公告)日：2021-02-25
申请号：US16549741
申请日：2019-08-23
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： James Mobley , Raymond W. Rice
Abstract: The present disclosure pertains to systems and methods for retrofitting data collection systems in an electrical power system. In one embodiment, a retrofit system includes a wireless current sensor. The wireless current sensor includes a current monitoring subsystem to generate a digitized representation of a current measurement of an alternating current signal in an electrical conductor, a power harvesting subsystem to harvest power from the electrical conductor, and a first wireless communication subsystem to transmit the digitized representation of the current measurement. An analog-to-digital converter includes at least one analog input in electrical communication with a voltage signal associated with the electrical conductor and a digital output to generate a digitized representation of the voltage signal. An intelligent electronic device in communication with a second wireless communication subsystem and the ADC may provide the digitized representations to a main processor.
-
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：US12222375B2
公开(公告)日：2025-02-11
申请号：US18051155
申请日：2022-10-31
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： James Mobley , Adam Seubert , Sally M. Mei
Abstract: A shunt resistor may, in some cases, receive interference from magnetic fields. The shunt resistor may include a resistive element coupled between multiple conductive elements, and measurement circuitry coupled to the leads, forming an electrically conductive loop. Current through the shunt resistor may be determined by measuring the current through the resistive element at the leads. An induced voltage in the loop may be determined by the product of the loop area and the magnetic field passing through the loop. Consequently, when a magnetic field is passed through the shunt resistor loop, an undesirable interfering signal may be produced, distorting the output signal of the shunt resistor. As the interfering signal is a product of the loop area and the magnetic field, the geometry of the shunt resistor may be modified to reduce the loop area and thus reduce or minimize the interference on the shunt resistor.
-
公开(公告)号：US20240142499A1
公开(公告)日：2024-05-02
申请号：US18051155
申请日：2022-10-31
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： James Mobley , Adam Seubert , Sally M. Mei
CPC classification number: G01R19/0092 , G01R1/203
Abstract: A shunt resistor may, in some cases, receive interference from magnetic fields. The shunt resistor may include a resistive element coupled between multiple conductive elements, and measurement circuitry coupled to the leads, forming an electrically conductive loop. Current through the shunt resistor may be determined by measuring the current through the resistive element at the leads. An induced voltage in the loop may be determined by the product of the loop area and the magnetic field passing through the loop. Consequently, when a magnetic field is passed through the shunt resistor loop, an undesirable interfering signal may be produced, distorting the output signal of the shunt resistor. As the interfering signal is a product of the loop area and the magnetic field, the geometry of the shunt resistor may be modified to reduce the loop area and thus reduce or minimize the interference on the shunt resistor.
-
-
-
-
-
-
-
-
-
Search Results
14
records
(took 0.022 seconds)
