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81. 发明申请

US20210165030A1 METHOD FOR MEASURING TRAP PARAMETERS IN XLPE CABLE BASED ON POLARIZATION-DEPOLARZATION CURRENT TEST 有权
公开(公告)号：US20210165030A1
公开(公告)日：2021-06-03
申请号：US17106063
申请日：2020-11-27
申请人： SICHUAN UNIVERSITY
发明人： Kai Zhou , Hao Yuan , Mingzhi Li , Yuan Li , Hang Xi
IPC分类号： G01R29/24 , G01R19/00 , G01R31/12
摘要： Disclosed is a method for measuring trap parameters in an XLPE cable based on a polarization-depolarization current test. First a detrapping current is extracted from a polarization current, then the staged linear fitting is performed for the detrapping current. Fitting parameters Am·τm and τm are used to represent trap parameters such as the trap charge density and the trap depth in the XLPE current. The trap charge density and charge accumulation of the XLPE cable insulation are reflected. This method can guarantee the accuracy and effectiveness of the trap parameter measurement. Furthermore, in the method, the staged linear fitting is performed for the detrapping current, providing an excellent fitting effect, effective elimination of various interference signals, and further accuracy improvement of the trap parameter measurement. In addition, the present disclosure is based on a PDC non-destructive test method.

82. 发明申请

US20210148993A1 GROUND FAULT DETECTION DEVICE 有权
公开(公告)号：US20210148993A1
公开(公告)日：2021-05-20
申请号：US17088085
申请日：2020-11-03
申请人： Yazaki Corporation
发明人： Hiroaki TAKAMATSU , Yoshihiro KAWAMURA , Ryosuke ARIGAYA
IPC分类号： G01R31/52 , G01R31/12
摘要： A ground fault detection device includes: a capacitor operating as a flying capacitor; a first switching unit for switching between a state in which a positive electrode side of a battery and a first electrode plate of the capacitor are connected in series via a resistance, and a state in which the first electrode plate of the capacitor is connected to the ground via a measurement resistance; a second switching unit for switching between a state in which a negative electrode side of a high-voltage battery and a second electrode plate of a detection capacitor are connected in series via a resistance, and a state in which the second electrode plate of the detection capacitor is connected to the ground via the resistance; a control unit for controlling the first switching unit and the second switching unit; and an offset voltage divider circuit that divides and offsets the voltage generated in the measurement resistance. The control unit has a first port for receiving an input of a voltage generated in the measurement resistance and a second port for receiving an input of a voltage output from the offset voltage divider circuit.

83. 发明授权

US11002882B2 Lightning strike alarm system using bipolar conventional air terminal 有权
公开(公告)号：US11002882B2
公开(公告)日：2021-05-11
申请号：US16788782
申请日：2020-02-12
申请人： OMNI LPS. CO., LTD.
发明人： Young Ki Chung
IPC分类号： G01W1/16 , G02B21/10 , H01L31/08 , G08B21/18 , H02S20/20 , G01R29/08 , G01R1/20 , G08B25/08 , G01R31/12 , G08B21/10
摘要： A lightning strike alarm system using a Bipolar Conventional Air Terminal (BCAT) is provided. The lightning strike alarm system using BCAT including a rod element to which a ground charge is electrified and an electrification plate-cone or an electrification plate-tube electrified by a thunderstorm cloud, includes a luminescence unit to be electrically connected to the rod element and the electrification plate-cone or the electrification plate-tube and emits light by electric energy electrified to the electrification plate-cone or the electrification plate-tube by the thunderstorm cloud. The lightning strike alarm system enables a user to find that an impulse current of the thunderstorm is normally and safely flown to the ground, and thus, the user may have psychological security.

84. 发明申请

US20210116492A1 CABLE ACCESSORY DEVICE AND SUBMARINE CABLE ACCESSORY SYSTEM 有权
公开(公告)号：US20210116492A1
公开(公告)日：2021-04-22
申请号：US17047601
申请日：2018-08-21
申请人： HUAWEI MARINE NETWORKS CO., LTD.
发明人： Fei XU , Changwu XU , Liyuan SHI , Liping MA
IPC分类号： G01R31/14 , G01R31/12 , G01R31/08 , G01R31/58
摘要： A cable accessory device, including a one-way conducting element and a grounding electrode. One end of the one-way conducting element is connected to a conductor structure in a cable, and the other end is connected to the grounding electrode. By applying voltages with different polarities to the one-way conducting element, the one-way conducting element is enabled to have different on/off states. When the on/off state of the one-way conducting element is an on state, the conductor structure in the cable is connected to the grounding electrode via the one-way conducting element, so as to measure direct current resistance of the conductor structure. Moreover, when the on/off state of the one-way conducting element is an off state, the one-way conducting element breaks connection between the conductor structure and the grounding electrode, so as to measure insulation resistance of an insulation structure. In this way, tests for measuring direct current resistance of the conductor structure and insulation resistance of the insulation structure may be facilitated, so that failures of the cable may be comprehensively investigated to damages in the cable may be found in time, thus reducing subsequent costs in locating and maintenance.

85. 发明授权

US10985695B2 DC arc detection and photovoltaic plant profiling system 有权
公开(公告)号：US10985695B2
公开(公告)日：2021-04-20
申请号：US16114571
申请日：2018-08-28
申请人： Analog Devices International Unlimited Company
发明人： Bijesh Poyil , Hans Brueggemann , Daniel Brian O'Malley
IPC分类号： H02S50/10 , G01R31/12
摘要： An arc detection method includes classifying whether an arc fault is present in the power system by, for each of a plurality of bins of a current frame of a signal, marking the bin as a candidate bin if a magnitude spectrum of the bin meets first criteria; determining a number of candidate bins in the current frame; marking the number of candidate bins as candidate cluster bins if the number of candidate bins exceeds a minimum cluster size; for each of the candidate cluster bins, determining whether the candidate cluster bin is also a candidate cluster bin of a previous frame of the first signal and if so, identifying the current frame as a candidate frame and incrementing a candidate frame count; and if the candidate frame count exceeds a candidate frame count threshold, determining that an arc fault is present in the power system.

86. 发明申请

US20210088573A1 SYSTEM FOR MONITORING FOR PARTIAL DISCHARGES IN AN ITEM OF ELECTRICAL EQUIPMENT VIA GASEOUS EMISSIONS 有权
公开(公告)号：US20210088573A1
公开(公告)日：2021-03-25
申请号：US16989536
申请日：2020-08-10
申请人： Schneider Electric Industries SAS
发明人： Venanzio FERRARO , Diego ALBERTO , Maxime DURAND
IPC分类号： G01R31/12 , G01K1/14 , G01N33/00
摘要： Method for monitoring for partial discharges in an electrical installation comprising at least one electrical cubicle, the electrical cubicle comprising at least one item of medium-voltage or high-voltage electrical equipment.

87. 发明申请

US20210088572A1 ANTENNA CONNECTIVITY WITH SHIELDED TWISTED PAIR CABLE 有权
公开(公告)号：US20210088572A1
公开(公告)日：2021-03-25
申请号：US16580251
申请日：2019-09-24
申请人： Rosemount Inc.
发明人： Jeffrey C. Andle
IPC分类号： G01R31/12 , G01R31/08 , H01B11/06 , H01B7/17 , H04B7/02
摘要： A sensor system for an electric power asset includes a sensor instrument coupleable to sensors associated with the electric power asset to receive sensor signals therefrom, and an antenna connection cable coupled to the sensor instrument. The antenna connection cable includes a cable sheath and a plurality of twisted pair signal carriers contained within the cable sheath to carry sensor signals received from the electric power asset. A first subset of the plurality of twisted pair signal carriers carry antenna signals and a second separate subset of the plurality of twisted pair signal carriers carry signals for partial discharge monitoring.

88. 发明申请

US20210080496A1 EMC TEST SYSTEM FOR ROTATING LOAD AND A TEST METHOD THEREOF 有权
公开(公告)号：US20210080496A1
公开(公告)日：2021-03-18
申请号：US17046806
申请日：2019-04-17
申请人： ZHUHAI ENPOWER ELECTRIC CO., LTD.
发明人： Hongxin LIU , Hongyu LI
IPC分类号： G01R31/00 , G01R29/08 , G01R31/12 , G01M15/02
摘要： An EMC test system for a rotating load includes a shielded chamber, a rotating load, a first connecting shaft, a compressor, a fluid pipeline, a fluid motor, a second connecting shaft and a motor load. The rotating load, the first connecting shaft and the compressor are arranged inside the shielded chamber. The fluid motor, the second connecting shaft and the motor load are arranged outside the shielded chamber. The rotating load is connected to the compressor through the first connecting shaft. The compressor is connected to the fluid motor through the fluid pipeline. The fluid motor is connected to the motor load through the second connecting shaft. The fluid pipeline passes through the shielded chamber. The compressor is employed such that energy is transferred to the outdoors through the transmission of fluid, and then converted into electric energy.

89. 发明申请

US20210063464A1 INSULATION MONITORING DEVICE APPLIED TO POWER SYSTEM AND POWER SYSTEM 有权
公开(公告)号：US20210063464A1
公开(公告)日：2021-03-04
申请号：US16930329
申请日：2020-07-16
申请人： Delta Electronics (Shanghai) Co.,Ltd.
发明人： Yicong XIE , Weiqiang ZHANG , Peng MA , Wei ZHOU
IPC分类号： G01R31/14 , H02M7/219 , G01R31/12
摘要： Embodiments of the present disclosure provide an insulation monitoring device applied to a power system and a power system. The power system includes at least one power electronic converter module. The insulation monitoring device includes an insulation component, a signal source, an impedance module, and a monitoring module. The insulation component at least partially wraps around the power electronic converter module. The signal source is electrically coupled to a circuit node in the power electronic converter module, the impedance module is connected between the signal source and the insulation component, and the monitoring module is configured to monitor an insulation resistance value of the insulation component, so that an insulation state of the power electronic converter module may be determined.

90. 发明授权

US10914779B2 Arc fault detection using time segmented captures 有权
公开(公告)号：US10914779B2
公开(公告)日：2021-02-09
申请号：US15972857
申请日：2018-05-07
申请人： SCHNEIDER ELECTRIC USA, INC.
发明人： Andi Jakupi
IPC分类号： G01R31/08 , G06K9/00 , H02H7/26 , G01R31/12 , H02H1/00
摘要： A detection method and system are provided to detect an arc fault signal in a (HF) high frequency signal monitored on a power line. The HF signal is monitored on the power line over a predefined time period such as a half-cycle of a base frequency, and is partitioned into a plurality of smaller time-segmented signal segments over the period. For each signal segment, a first filter is applied to a signal spectrum of the signal segment to produce a filtered signal spectrum having one or more frequency intervals associated with power line communication filtered from the signal spectrum. HF signal content is checked in the filtered signal spectrum, and a binary value is assigned to the signal segment based upon a presence or absence of HF signal content. Thereafter, an arc fault event is determined based on the accumulated binary values of the signal segments.

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