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公开(公告)号：US20220306020A1
公开(公告)日：2022-09-29
申请号：US17487762
申请日：2021-09-28
申请人： DENSO TEN Limited
IPC分类号： B60R16/033 , H02H3/08 , H02H7/28 , H02J7/14
摘要： A power supply device includes: a first system; a second system; an inter-system switch configured to be able to connect and disconnect between the first system and the second system; a determining unit configured to keep the inter-system switch in an ON state in a normal time, and turn off the inter-system switch and determine which system a ground fault has occurred in, if detecting a ground fault of the first system or the second system; and a suppression circuit configured to suppress an electric discharge of the second power supply and supply electric power for ground fault detection to the second system, and the determining unit determines whether any ground fault has occurred in the second system or not, based on the electric power which is supplied from the suppression circuit to the second system.
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公开(公告)号：US11411389B1
公开(公告)日：2022-08-09
申请号：US17201066
申请日：2021-03-15
发明人： Venkatesh Chakrapani , Ilia Voloh
摘要： Systems, methods, and computer-readable media are disclosed for identifying a fault using systems and methods for a controlled dynamic MHO characteristic. Particularly, the systems and methods described herein may automatically control the dynamic expansion of the MHO characteristic based on the estimation of uncontrolled dynamic MHO expansion estimation and maximum allowable expansion set by a user. This may provide flexibility in that, the MHO can be allowed to expand to a maximum level, when the estimated MHO expansion value is below the user defined maximum allowable expansion level, but also provides a controlled dynamic MHO when the estimated values are above the maximum allowable level.
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3.发明授权公开(公告)号：US10825323B2
公开(公告)日：2020-11-03
申请号：US15859107
申请日：2017-12-29
申请人： PPL Corporation
发明人： Mychal Kistler
摘要： A method of determining a fault and whether to activate an alarm includes detecting a first high impendence fault (HIF) at a first detection circuit having a first phase and triggering a variable pickup timer. The method further includes monitoring for a second HIF at a second detection circuit having a second phase for a period of time set by the variable pickup timer. The method further includes determining whether to trigger an alarm, wherein the alarm is triggered by the second HIF at the second detection circuit having the second phase being detected during the period of time and the alarm is otherwise not triggered.
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公开(公告)号：US10734802B2
公开(公告)日：2020-08-04
申请号：US15573936
申请日：2016-05-12
摘要： A DC distance protection scheme for protecting a DC power transmission medium within the DC electrical power network. The DC distance protection scheme includes a protection device that is coupled in use to a DC power transmission medium. The protection device is operable to protect the DC power transmission medium from an electrical fault. The DC distance protection scheme also includes a measurement apparatus to selectively measure the current and voltage of the DC power transmission medium. In addition the DC distance protection scheme also includes a controller that is programmed to calculate an operating voltage of the DC power transmission medium using the measured current and voltage; perform a transient comparison between the calculated operating voltage and the measured voltage; and operate the protection device to protect the DC power transmission medium if the transient comparison meets a predefined criterion.
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公开(公告)号：US20200169113A1
公开(公告)日：2020-05-28
申请号：US16201573
申请日：2018-11-27
摘要： Systems and apparatuses include a mesh network for power distribution. The mesh network includes a plurality of interconnected four-way automatic transfer switches. Each four-way automatic transfer switch includes a common pole, a first pole selectively coupled to the common pole with a first switching device, a second pole selectively coupled to the common pole with a second switching device, a third pole selectively coupled to the common pole with a third switching device, and a fourth pole selectively coupled to the common pole with a fourth switching device. The common pole of a first interconnected four-way automatic transfer switch of the plurality of interconnected four-way automatic transfer switches is structured to provide power to a corresponding load, and the common poles of two or more of the plurality of interconnected four-way automatic transfer switches are structured to receive power from corresponding power sources.
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公开(公告)号：US10407003B2
公开(公告)日：2019-09-10
申请号：US15434932
申请日：2017-02-16
摘要： A power distribution system for a vehicle includes a plurality of switching devices arranged in a circuit to selectively control power flow between a plurality of buses operating within a same voltage range. The power distribution system further includes a controller programmed to, in response to the switching devices being in a state to transfer power between the buses and a current flowing through one of the buses exceeding a predetermined current, operate the switching devices to isolate the buses.
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公开(公告)号：US20190137559A1
公开(公告)日：2019-05-09
申请号：US16303420
申请日：2017-05-16
发明人： Klaus Winter , Andreas Winter
摘要： In a multi-phase power grid fed by a power source, earth fault (460) is located by means of a power supply source synchronized with the power grid, which is connected between a zero point of the grid and earth. In a fault current compensation mode (420), a control unit controls the alternating voltage source to compensate for any ground fault current in the power grid to a value below a threshold level. In a fault detecting mode (430), the control unit gradually adjusts the output voltage of the alternating voltage source with respect to amplitude and/or phase angle (440). A change of zero-sequence current and zero-sequence admittance between the alternating voltage source and a fault location is measured (450) by means of at least one detector. The at least one detector is communicatively connected to the control unit and reports recorded measured values representing zero-sequence current and/or zero-sequence admittance to the control unit. In the fault detecting mode, the control unit localizes a ground fault (460) based on at least one of said measurement values representing changes of the zero-sequence current and/or zero-sequence admittance, upon which an affected branch is disconnected (470) or the system switches to the fault compensation mode (420).
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公开(公告)号：US10242834B2
公开(公告)日：2019-03-26
申请号：US14191729
申请日：2014-02-27
发明人： Wei Gang Chen , Feng Du , Yue Zhuo
摘要： A method and device are disclosed for determining the direction of current flowing through a circuit breaker. An embodiment includes obtaining a sample value of current flowing through the circuit breaker and a differential value of current; obtaining a sample value of voltage at the circuit breaker; on the basis of a relationship between voltage and current in an equivalent circuit in which the circuit breaker lies at the present time and at a previous time, obtaining an equivalent resistance and an equivalent inductance in the equivalent circuit; if the equivalent resistance and equivalent inductance are both greater than zero, determining that the direction of current flowing through the circuit breaker is the same as the current reference direction, and if the equivalent resistance and equivalent inductance are both less than zero, determining that the direction of current flowing through the circuit breaker is opposite to the current reference direction.
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公开(公告)号：US09733659B2
公开(公告)日：2017-08-15
申请号：US14746120
申请日：2015-06-22
申请人： ABB Research LTD.
发明人： Fang Yang , Vaibhav Donde , Zhenyuan Wang , James Stoupis , David Lubkeman
CPC分类号： G05F1/66 , G06F11/1441 , G06F2201/805 , H02H3/06 , H02H3/265 , H02H7/28 , Y04S10/30 , Y04S10/52 , Y04S10/522 , Y04S10/525
摘要： A method and system restores power in a power distribution network. The network includes a plurality of power sources, a plurality of loading zones, a plurality of switching devices interconnected between the plurality of power sources and the plurality of loading zones, and an intelligent electronic device associated with each of the plurality of switching devices to control the switching devices. A base network state is defined and a power restoration logic is created for the base network state. A simulation is run for the power restoration logic and then the power restoration logic is transmitted to a power restoration controller which thereafter monitors and controls the intelligent electronic devices.
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公开(公告)号：US09660435B2
公开(公告)日：2017-05-23
申请号：US13332927
申请日：2011-12-21
CPC分类号： H02H3/081 , H02H7/261 , H02H7/28 , Y10T307/305
摘要： A multidirectional electrical power protection system, includes a first power supply and at least a second power supply with each supply being configured for supplying power to a main bus circuit; a first load bus electrically connected to the first power supply and at least the second power supply, at least a second load bus electrically coupled with each of the first power supply and at least the second power supply, the first load bus and the second load bus configured for energizing devices connected to the respective first and second load bus; and at least one smart contactor in coupled with the main bus circuit, the at least one smart contactor being configured for sensing a first current flowing in a first direction through the main bus circuit and for sensing a second current flowing in a second direction through the main bus circuit.
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