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公开(公告)号：US20220308104A1
公开(公告)日：2022-09-29
申请号：US17834974
申请日：2022-06-08
申请人： S&C Electric Company
发明人： Yoav Sharon
摘要： A method for identifying a location of a fault in an electrical power distribution network that includes identifying an impedance of an electrical line between each pair of adjacent utility poles, measuring a voltage and a current of the power signal at a switching device during the fault, and estimating a voltage at each of the utility poles downstream of the switching device using the impedance of the electrical line between the utility poles and the measured voltage and current during the fault. The method calculates a reactive power value at each of the utility poles using the estimated voltages, where calculating a reactive power value includes compensating for distributed loads along the electrical line that consume reactive power during the fault, and determines the location of the fault based on where the reactive power goes to zero along the electrical line.
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公开(公告)号：US20220269234A1
公开(公告)日：2022-08-25
申请号：US17677885
申请日：2022-02-22
申请人： S&C Electric Company
发明人： Yoav Sharon , Qing Guo
IPC分类号： G05B19/042 , H04L41/12 , H04L67/12
摘要： A system and method for representing the topology of a power distribution network, where the network includes at least one power source, a feeder and a plurality of switching devices positioned along the feeder. The method includes providing a device list in each switching device that includes a local device index of each of the switching devices, a local team index of the team on an X-side of each of the switching devices, the local team index of the team on a Y-side of each of the switching devices and device specific data, where the X and Y-sides of the switching device is the physical orientation of the device when it is installed, and providing a team list in each switching device that includes the local team index of each of the teams, the local device indices of the switching devices on each team and team specific data.
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公开(公告)号：US20220268826A1
公开(公告)日：2022-08-25
申请号：US17677890
申请日：2022-02-22
申请人： S&C Electric Company
发明人： Qing Guo , Michael Quinlan , Yoav Sharon , Boris Marendic
摘要： A system and method for determining loads throughout a power distribution network having a plurality of switching devices provided along a feeder. The method includes measuring the current and/or voltage on one or both sides of the switching devices and calculating a power flowing through each of the switching devices and a load in each section using the current and/or voltage measurements at predetermined sample times. The method further includes storing a plurality of recorded current/voltage measurements or calculated powers flowing through each device for consecutive sample times. The method then determines a median load from the measurements and power flows and calculates a load in each of network sections.
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公开(公告)号：US20210036508A1
公开(公告)日：2021-02-04
申请号：US16786864
申请日：2020-02-10
申请人： S&C Electric Company
IPC分类号： H02H7/26 , H02H1/00 , G05B19/042 , H02J13/00
摘要： A control system and method for a group of interconnected feeders which enables fault location, isolation and service restoration without requiring each switch to have topology knowledge of devices in adjacent feeders. The method defines, for each switch, connectivity and X/Y directional information about its neighboring switches and propagates this information throughout each feeder. A leader device is also determined for each feeder. Information about topology of adjacent feeders is not needed by all devices. Only normally-open tie switches which define a boundary between two adjacent feeders have knowledge of the devices in both feeders. Switches which open during fault isolation automatically find open tie switches in a direction opposite the fault, and request service restoration downstream of the fault by providing power from an adjacent feeder. Leader devices ensure an overload condition is not created before initiating opening and closing operations of switches downstream of the fault.
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5.发明申请公开(公告)号：US20200076183A1
公开(公告)日：2020-03-05
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.
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公开(公告)号：US20200072894A1
公开(公告)日：2020-03-05
申请号：US16456202
申请日：2019-06-28
申请人： S&C Electric Company
发明人： Alejandro Montenegro , Yoav Sharon
摘要： Detection of faults in an electrical power distribution network that includes measuring current flowing through a recloser in a feeder line, detecting a fault current indicating a fault is present in the feeder line, and opening a switch in the recloser in response to detecting the fault current. A first pulse having a first pulse duration time is generated, and the current flow in the recloser during the first pulse duration time is analyzed. A second pulse having a second duration time that is longer than the first pulse duration time is generated if it is determined that no fault current exists during the first pulse duration time, and the system voltages and the current flowing through the recloser after the second pulse duration time is analyzed for the presence of the fault.
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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.
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公开(公告)号：US11374405B2
公开(公告)日：2022-06-28
申请号：US16742970
申请日：2020-01-15
申请人： S&C Electric Company
发明人： Qing Guo , Yoav Sharon , Michael Meisinger
摘要： A communication-based permissive protection method for protecting an electrical power distribution network from a fault. The network includes a power source, an electrical line and a plurality of fault interrupters, where the fault interrupters are operable to prevent current flow in response to the fault. The method includes detecting the fault by each fault interrupter that is between the fault and the power source, and sending a drop of voltage message from each fault interrupter that doesn't detect the fault, but does detect a drop of voltage as a result of the fault to its immediate upstream fault interrupter. The method opens the fault interrupter that both detects the fault and receives a drop of voltage message from all of the fault interrupters immediately downstream of that fault interrupter.
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公开(公告)号：US20220109302A1
公开(公告)日：2022-04-07
申请号：US17489921
申请日：2021-09-30
申请人： S&C Electric Company
发明人： Michael Quinlan , Daniel Desmond , Yoav Sharon
摘要： A system and method for restoring power in a closed-loop power distribution network. The network includes at least two power sources, at least one feeder and a plurality of switching devices positioned along the at least one feeder and being in communications with each other. The method performs a radial restoration process for restoring power and then determines that at least one of the sections is not receiving power after the radial restoration process has been performed. The method estimates power flow through each switching device and determines an available power capacity from each switching device. The method then determines if the unpowered sections can be powered by any of their neighbor and non-neighbor devices. The method virtually closes the switching devices to power the unpowered sections and updates the estimation of power flow through each switching device and determination of available power capacity from each switching device.
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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.
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