-
公开(公告)号：US20220102973A1
公开(公告)日：2022-03-31
申请号：US17400412
申请日：2021-08-12
申请人： S&C Electric Company
摘要： A method for isolating a fault in an underground power distribution network. The network includes a power line, a plurality of transformers electrically coupled to and positioned along the power line, a first recloser connected to one end of the power line and a second recloser connected to an opposite end of the power line, where each transformer includes an upstream switching device and a downstream switching device, and where power is provided to both ends of the power line through the first and second reclosers and one of the switching devices is a normally open switching device. The method includes detecting overcurrent by some of the switching devices, detecting loss of voltage by some of the switching devices and sending clear to close messages to some of the switching devices to open and close certain ones of the switching devices to isolate the fault.
-
公开(公告)号：US20200075235A1
公开(公告)日：2020-03-05
申请号：US16556319
申请日：2019-08-30
申请人： S&C Electric Company
IPC分类号： H01F41/02 , H01F41/079 , H01F41/12
摘要： A current transformer assembly for harvesting power from a primary conductor, such as a power line, for operating electronics, where the assembly is secured to the conductor while the conductor is connected. The assembly includes a current transformer having a transformer structure with a central opening that accepts the primary conductor and a spindle member for accepting a current transformer magnetic tape operating as the core of the current transformer. The assembly also includes a tape carrier secured to the structure on which the transformer tape is wound, and a winding device operable to unwind the transformer tape from the tape carrier and wind the tape onto the spindle member.
-
公开(公告)号：US10247767B2
公开(公告)日：2019-04-02
申请号：US14956125
申请日：2015-12-01
申请人： S&C Electric Company
发明人： Michael Ennis , Adam Gardner , Alejandro Montenegro , Yoav Sharon
摘要： Methods and apparatus are provided for fault detection and direction determination with a phase overcurrent relay using individual phase torques and the negative sequence torque, and with a ground overcurrent relay using the zero sequence torque. A directional element includes a ground element logic circuit, a negative element logic circuit and a phase element logic circuit to evaluate the operation state of the system, detect a fault condition and determine the direction of the fault condition in an electrical power distribution system having multiple sources on a power grid.
-
公开(公告)号：US20230051143A1
公开(公告)日：2023-02-16
申请号：US17853974
申请日：2022-06-30
申请人： S&C Electric Company
摘要： A system and method for maintaining electrical stability of a high-voltage transmission power system in response to a fault. The method includes detecting the fault, opening a switch to clear the fault, performing a first pulse test for a predetermined duration of time to determine if the fault is still present, preventing a reclosing operation from occurring if the pulse test indicates that the fault is still present, and allowing the reclosing operation to occur if the first pulse test indicates that the fault is not present. One or more subsequent pulse tests can be performed if the first pulse test is inclusive about the persistence of the fault, where the reclosing operation is prevented from occurring if the pulse tests indicate that the fault is still present and the reclosing operation is allowed if the pulse tests indicate that the fault is no longer present.
-
5.发明授权公开(公告)号：US11569652B2
公开(公告)日：2023-01-31
申请号：US17400404
申请日：2021-08-12
申请人： S&C Electric Company
发明人： Daniel Desmond , John French , Konstantin Lakirovich , Michael Quinlan , Alejandro Montenegro , David G Porter , Joseph W Milton , Thomas J Dyer
IPC分类号： H02H3/00 , H02H7/00 , H02H3/06 , H02J3/00 , H02H7/26 , H02J13/00 , H02H3/08 , H02J50/00 , H01H33/53 , H01H33/66 , H02H1/00 , H02H7/04 , G01R31/08 , H02H3/04
摘要： A switch assembly that is part of a transformer in an underground residential power distribution circuit and that provides fault isolation and restoration. The switch assembly includes first and second switching devices each having an outer housing, a transformer interface electrically coupled to the transformer, a connector interface electrically coupled to a first connector and a first vacuum interrupter having a fixed contact and a movable contact, where the fixed contact is electrically coupled to the connector interface and the movable contact is electrically coupled to the transformer interface. A control board controls the first and second switching devices, where the control board is responsive to voltage signals from capacitors in the first and second switching devices.
-
公开(公告)号：US20220181866A1
公开(公告)日：2022-06-09
申请号：US17524167
申请日：2021-11-11
申请人： S&C Electric Company
摘要： A system and method for quickly detecting fault current on a power line in an electrical power distribution network. A switch assembly includes a detecting circuit for quickly detecting the fault current on the power line. The circuit includes a Rogowski coil wrapped around the power line that provides an output measurement signal that is proportional to a change in the current flow on the line, and a passive integrator responsive to the output measurement signal from the Rogowski coil that integrates the output measurement signal over time. The circuit also includes an amplifier responsive to and amplifying the integrated output measurement signal and a microcontroller responsive to the amplified output measurement signal that calculates the current flow on the line using the amplified output measurement signal. A current transformer harvests energy from the power line to power the circuit when the fault current is occurring.
-
公开(公告)号：US11322927B2
公开(公告)日：2022-05-03
申请号：US16866656
申请日：2020-05-05
申请人： S&C Electric Company
摘要： A dropout recloser is capable of in accordance with its operating programming after a predetermined number of fault interrupting operations, e.g., 1, 2, 3 or more but typically 3, to drop out of a cutout and hang freely in a hinge contact of the cutout providing sectionalization with an observable visible gap. The recloser includes fault interrupting and reclosing components, a drop out mechanism and a controller. The drop out mechanism may include a bi-stable actuator to affect fault interrupting operation and dropout operation. The device may include motion limiting structures. The recloser may have a number of operating modes or sequences.
-
公开(公告)号：US11303109B2
公开(公告)日：2022-04-12
申请号：US17005385
申请日：2020-08-28
申请人： S&C Electric Company
摘要： A fault protection system for providing protection from fault current for components and devices on a lateral line proximate to a distribution transformer in a power distribution network. The system includes a single-phase recloser having a vacuum interrupter that is controlled by a controller. In one embodiment, the recloser has an insulating body that is molded in combination with an insulating body of a bushing that is connected to the distribution transformer. In this embodiment, the controller can be powered by a current transformer within the recloser. In another embodiment, the recloser is mounted to a utility pole separate from the distribution transformer, where the controller is powered by the low voltage side of the transformer and the current transformer is eliminated. An isolated power supply is provided between the transformer and the controller to provide voltage isolation.
-
公开(公告)号：US20220108855A1
公开(公告)日：2022-04-07
申请号：US17489940
申请日：2021-09-30
申请人： S&C Electric Company
发明人： Alejandro Montenegro
IPC分类号： H01H33/666 , H01H33/02 , G01R15/20 , G01R27/16 , G01R27/26
摘要： A switch assembly including a switch and a high impedance element used for energy harvesting purposes that are connected to a power line and assembly electronics. The high impedance element has higher impedance than the switch so that current flows through the switch from the power line when the switch is closed and through the high impedance element from the power line when the switch is open. The switch assembly also includes a current sensing device, such as a current sensing resistor, electrically coupled in series with the high impedance element and the electronics. By measuring the current flow using the current sensing device, it is possible to infer the voltage across the high impedance element since its impedance is known. This voltage can be used to provide point on wave closing of the switch and to determine the line voltage magnitude.
-
公开(公告)号：US11081878B2
公开(公告)日：2021-08-03
申请号：US16550448
申请日：2019-08-26
申请人： S&C Electric Company
发明人： Alejandro Montenegro , Yoav Sharon
摘要： A method for controlling multiple switching devices in an electrical power distribution network in response to detecting a fault. The method determines that a fault current is present, and opens a switch in each of the switching devices in response thereto. The method then initiates a current pulse in the switch in a farthest upstream switching device for a first pulse duration time, closes the switch in the farthest upstream recloser if no fault current is detected during the first pulse duration temporarily changes the TCC curve of the farthest upstream recloser to a second TCC curve that is an instantaneous or near instantaneous TCC curve, and initiates a current pulse in the switch in a next farthest upstream switching device that is downstream of the farthest upstream switching device after the switch in a farthest upstream switching device is closed.
-
-
-
-
-
-
-
-
-
搜索结果
29 条记录 (耗时 0.016 秒)