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公开(公告)号：US11245255B2
公开(公告)日：2022-02-08
申请号：US16973098
申请日：2018-06-11
申请人： Siemens Aktiengesellschaft , Feng Du , Wei Gang Chen , Yue Zhuo
发明人： Feng Du , Wei Gang Chen , Yue Zhuo
摘要： A solid-state circuit breaker and breaking method are disclosed. In an embodiment, the solid-state circuit breaker includes a semiconductor switch; a controller, connected to the semiconductor switch; and an energy absorber, connected in parallel with the semiconductor switch. The controller is configured to obtain an equivalent inductance of a circuit of the solid-state circuit breaker upon a fault occurring in a line. Further, upon the equivalent inductance being greater than an inductance estimated value, the controller is configured to set a second current fault threshold. Finally, upon a fault current of the line reaching the second current fault threshold, the semiconductor switch is controlled to execute a closing operation.
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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：US10276301B2
公开(公告)日：2019-04-30
申请号：US15708186
申请日：2017-09-19
发明人： Feng Du , Wei Gang Chen , Yue Zhuo
摘要： A current transformer and a direct current source based on a current transformer are disclosed. In an embodiment, the current transformer includes two output ends; a first winding and a second winding connected in series between the two output ends; a main core; a bypass core, arranged to be magnetically coupled with the main core. The first winding is wound on a part of the main core and a part of the bypass core, and the second winding is wound on apart of the bypass core. In an embodiment, the current transformer also includes a high-frequency bypass, connected in parallel with the first winding, and used to filter a high-frequency signal. The high-frequency bypass provides a low-impedance path for a high-frequency signal in a primary conductor under measurement, such that the bypass core with the second winding presents less obstruction to the main core, thereby reducing heating.
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公开(公告)号：US09941065B2
公开(公告)日：2018-04-10
申请号：US14259279
申请日：2014-04-23
发明人： Wei Gang Chen , Mario Dankert , Zhong Yi He , Yue Zhuo
CPC分类号： H01H9/54 , H01H9/167 , H01H71/1081 , H01H71/123 , H02H7/262 , H02H7/30 , Y10T307/76
摘要： A current assignment method and a switch arrangement are disclosed for assigning current, the switch arrangement including two series-connected switches, each including a trigger unit to check whether a preset current condition is satisfied. A signal is sent by the trigger unit of a switch which is postpositionally placed when the current condition is satisfied, the signal at least preventing the immediate triggering of a correspondingly prepositionally placed switch after being received by the corresponding trigger unit. To achieve a technically simple communication connection between switches, in at least one embodiment each trigger unit is formed so as to send but and receive the signal, and each trigger unit includes a measurement unit for measuring an energy flow direction in a subordinate switch and a conversion unit for converting from sending to receiving or from receiving to sending appropriately when the energy flow direction is reversed.
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公开(公告)号：US11831158B2
公开(公告)日：2023-11-28
申请号：US16965383
申请日：2018-01-31
发明人： Feng Du , Wei Gang Chen , Zhen Liu , Yue Zhuo
CPC分类号： H02J3/0012 , G05B23/0221 , H02J3/381 , H02J13/00002 , H02J2300/24
摘要： Provided are a grid fault detection method and a device. The grid includes at least one AC power source provided by a public grid. The AC power source is coupled to a plurality of parallel circuits, each including a plurality of parallel branches. The parallel branches are each connected with a load and/or a DC power source. The grid fault detection method having the distributed energy resource includes: selecting a first collection point between the AC power source and the plurality of parallel circuits, and collecting a current value and a current direction of the first collection point; comparing an output current and an input current of the first collection point, and upon the input current being greater than the output current, it is determined that the plurality of parallel circuits are faulty. Accordingly, the plurality of collection points check the fault, so as to trigger a protection device.
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公开(公告)号：US11681597B2
公开(公告)日：2023-06-20
申请号：US16957744
申请日：2017-12-29
发明人： Xi Hu , Ji Li , Qinggang Wang , Yue Zhuo
CPC分类号： G06F11/3013 , G05B19/05 , G05B19/058 , G06F11/079 , G06F11/3072 , G06F11/3089 , G05B23/0289
摘要： An anomaly detection method and system for a process instrument, and a storage medium are disclosed. The method includes that: a programmable logic controller (PLC) receives measurement data of a process instrument, the measurement data being periodically stored into a historical database so that a service providing system can perform reading and evaluation. At least one virtual function module is integrated on the PLC, a mapping relation is formed between at least one input channel of each virtual function module and output of at least one anomaly diagnosis algorithm disposed on the service providing system, and each anomaly diagnosis algorithm is used for diagnosing whether an anomaly exists in the process instrument. When an anomaly indication outputted by the service providing system is received via an input channel of the virtual function module, the PLC determines that an anomaly exists in the corresponding process instrument.
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公开(公告)号：US09916193B2
公开(公告)日：2018-03-13
申请号：US14552650
申请日：2014-11-25
发明人： Wei Gang Chen , Mario Dankert , Feng Du , Yue Zhuo
CPC分类号： G06F11/079 , G06F11/0745 , G06F13/4027 , H02H1/0061 , H02H7/30
摘要： A zone selective interlocking device includes a first port, a second port, an input bus, an output bus and a query signal receiving branch. The first and second port each are switchable between two states, connected to the input bus and connected to the output bus, and the zone selective interlocking device is operable in a first mode. In the first mode, the query signal receiving branch is turned on. Within a preset timeslot, a link fault query signal is permitted to be inputted to the query signal receiving branch through the first port, while a link fault query signal is prevented from being inputted to the query signal receiving branch through the second port. Based on whether a link fault query signal is received within the timeslot, a judgment is made on whether a fault has occurred in a communication link connected to a corresponding port.
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公开(公告)号：US09897640B2
公开(公告)日：2018-02-20
申请号：US14726755
申请日：2015-06-01
发明人： Wei Gang Chen , Feng Du , Sebastian Haas , Yue Zhuo
CPC分类号： G01R31/025 , H02H1/0015 , H02H3/16
摘要： A fault arc detection method includes: sampling an instantaneous current value of a circuit; using the instantaneous current value to predict a current peak value and, when the predicted current peak value is greater than a predetermined threshold, determining that a first energy fault arc is to appear; and comparing a time domain or frequency domain feature of the instantaneous current value with a reference time domain feature or a reference frequency domain feature of the current of a fault arc of the circuit. When the similarity between the time domain or frequency domain feature and the reference time or reference frequency domain feature of the current of the fault arc reaches a predetermined range, a second energy fault arc is determined to appear. The method and detection device detect the occurrence of a fault arc early and they are able to distinguish different types of fault arcs.
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公开(公告)号：US11640152B2
公开(公告)日：2023-05-02
申请号：US16649842
申请日：2017-09-28
IPC分类号： G05B19/05
摘要： Embodiments of the present disclosure provide method and device for providing service for a programmable logic controller (PLC), including: creating a virtual-functional-module-description file including an address of an input channel of a virtual functional module to be created; and creating the virtual functional module in a PLC based on the virtual-functional-module-description file, assigning the address to the input channel of the virtual functional module, and creating a virtual-functional-module-configuration file including a mapping relation between the input channel and an output of a service provider. The present disclosure proposes a concept of a virtual functional module which is used to map data provided by intelligent data sources outside the PLC to input channel of PLC so that the data can be the same as normal input values used by PLC program.
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公开(公告)号：US11025053B2
公开(公告)日：2021-06-01
申请号：US16068717
申请日：2017-01-04
发明人： Eric Chemisky , Fei Huang Hu , Ling Bao Min , Yue Zhuo
IPC分类号： H02H9/04
摘要： A surge protection circuit protection circuit includes a first series-connected line formed by at least two TVSs connected in series. One end of the line is connected to a positive terminal, and another is connected to a negative terminal. A second series-connected line is formed by at least one TSS. One end is connected between the at least two TVSs in the first series-connected line, and another end is grounded. The first line is connected in parallel to a protected circuit. When a differential-mode surge voltage appears at the ends of the first line, a voltage of a backend connection circuit is clamped to a first value. When a common-mode surge voltage appears at the two ends of the first line to the ground end, respectively, voltages to ground of the positive terminal and the negative terminal are reduced to a second value.
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