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公开(公告)号：US20240162747A1
公开(公告)日：2024-05-16
申请号：US18282686
申请日：2022-03-24
IPC分类号： H02J50/00 , G01H11/06 , G01R19/165 , G01R31/62
CPC分类号： H02J50/001 , G01H11/06 , G01R31/62 , G01R19/16576
摘要： A monitoring device includes a vibration-driven energy harvesting element as a vibration-driven energy harvesting unit that performs power generation in response to a sound or a vibration being occurred by a monitoring target and having a predetermined frequency, and a notification unit that notifies a state change of the monitoring target based on a magnitude relationship between a predetermined threshold value and a voltage value of the power generation by the vibration-driven energy harvesting element. The notification unit is configured to notify the state change when the vibration-driven energy harvesting element performs the power generation. Therefore, the vibration-driven energy harvesting element, which functions as a sensor unit, requires no power supply.
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2.发明公开公开(公告)号：US20240103098A1
公开(公告)日：2024-03-28
申请号：US18023625
申请日：2021-08-30
申请人： OKTO Grid Aps
发明人： Golam Reza Wöhlok Sadeghnia , Paul Henri Marcel Didier , Rasmus Per Johansson , Anders Filtenborg
CPC分类号： G01R31/62 , G01H1/16 , G06F17/142
摘要： Methods, apparatuses, and systems for analysing the state of power transformers are described. A method may include providing at least one sensor arranged relative to a power transformer, retrieving at least one vibroacoustic signal from said at least one sensor, performing a time-frequency decomposition of said at least one vibroacoustic signal from a time domain to a frequency domain, identifying one or more vibroacoustic harmonic frequencies provided by the fast Fourier transformation of the at least one vibroacoustic signal, calculating an amplitude value and a phase angle related to the one or more harmonic frequencies, retrieving an electromagnetic signal emitted from the power transformer, a temperature generated by the power transformer, or both, and providing at least one analysed information from the amplitude value and the phase angle related to the one or more harmonic frequencies, the electromagnetic signal, the temperature, or any combination thereof.
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3.发明公开公开(公告)号：US20240103097A1
公开(公告)日：2024-03-28
申请号：US18012977
申请日：2022-08-17
发明人： Xin Zheng , Wenjing Yu , Tao Peng , Yi Fang , Ming Lei , Hong Shi , Ben Ma , Li Ding , Wei Wei , Linghua Li , He Yu , Tian Xia , Yingchun Wang , Sike Wang , Dongri Xie , Xin Wang , Bo Pang , Xianjin Rong
IPC分类号： G01R31/62
CPC分类号： G01R31/62
摘要： The present disclosure provides a direct current (DC) transformer error detection apparatus for a pulsating harmonic signal, including a DC and pulsating harmonic current output module and an external detected input module, where the DC and pulsating harmonic current output module outputs a DC and a DC superimposed pulsating harmonic current to an internal sampling circuit and a self-calibrated standard resistor array; and the internal sampling circuit converts the input DC and the input DC superimposed pulsating harmonic current into a voltage signal, and sends the voltage signal to an analog-to-digital (AD) sampling and measurement component through a front-end conditioning circuit and a detected input channel. The DC transformer error detection apparatus can complete self-calibration for measurement of the DC and the pulsating harmonic signal on a test site.
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4.发明公开公开(公告)号：US20240069120A1
公开(公告)日：2024-02-29
申请号：US18240311
申请日：2023-08-30
申请人： UBICQUIA, INC.
IPC分类号： G01R31/62
CPC分类号： G01R31/62
摘要： A distribution transformer system includes a distribution transformer and a distribution transformer monitoring device (DTM). The DTM includes an optical sensor operable to generate an output signal (e.g., an output voltage) in response to incident light, a communication interface, non-transitory memory storing processor-executable instructions, and a processor operably coupled to the optical sensor, the communication interface, and the memory. The processor is operable in accordance with the processor-executable instructions to, among other things, determine whether the output signal generated by the optical sensor substantially corresponds to one of multiple stored data signatures representing light producing events (such as arcing, fire, or the presence of unexpected ambient light) and, when such criterion is met, communicate an alert to a remote computing device via the communication interface. The distribution transformer may be pad-mountable, aerially mountable (e.g., mountable to a utility pole), or cabinet mountable, as applicable.
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公开(公告)号：US11914057B2
公开(公告)日：2024-02-27
申请号：US16709181
申请日：2019-12-10
申请人： HITACHI ENERGY LTD
IPC分类号： G01S3/808 , B05D7/00 , C09D5/08 , B05C1/00 , G01S5/00 , G01R31/62 , G01S3/803 , G01S11/14 , G01S5/18 , C09D5/00 , C08K3/22 , C08K5/29 , C09D7/00 , C08K3/30 , F41H5/06 , G01H1/00
CPC分类号： G01S3/808 , B05C1/003 , B05D7/56 , C09D5/082 , G01R31/62 , G01S3/803 , G01S5/0018 , G01S5/18 , G01S11/14 , C08K3/22 , C08K5/29 , C08K2003/3045 , C09D5/002 , C09D7/00 , F41H5/06 , G01H1/00 , G01S5/0027 , Y10S367/906
摘要： A system for detecting an object approaching and/or impacting electrical equipment is disclosed. The system includes a housing for the electrical equipment and acoustic sensor(s) for measuring a sound pressure of the object approaching the housing, the acoustic sensor(s) disposed at a location at which the acoustic sensor(s) is not in contact with the housing. The system further includes vibration sensor(s) for measuring an acceleration of a surface of the housing caused by the object striking the housing, the vibration sensor(s) disposed at a location at which the vibration sensor(s) is in contact with the housing, and a computer readable storage medium having thereon machine-readable instructions that when executed determine the approach of the object for impact on the housing and/or the impact of the object to the housing.
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公开(公告)号：US11892488B2
公开(公告)日：2024-02-06
申请号：US17292201
申请日：2019-10-02
申请人： HITACHI ENERGY LTD
发明人： Nilanga Abeywickrama
CPC分类号： G01R27/2605 , G01R27/2694 , G01R31/62
摘要： The present invention relates to a method and monitoring device, for monitoring N number of transformer bushings operating in substantially the same environment. N being any number more than 1. The method comprises estimating an absolute value for the capacitances of each of the bushings, the absolute values for the capacitances being denoted Cx, and estimating an absolute value for the loss factor or the power factor of each of the bushings, the absolute values for the loss factors or the power factors being denoted Fx. X is a number representing which bushing the value is associated to and X larger than 1. The method further comprises calculating Δ-values for all C values and Δ-values for all F values, according to:
ΔCX=CX−CX+1, for all values up to, and including, ΔCN−1,
ΔCN=CN−C1, for ΔCN,
ΔFX=FX−FX+1, for all values up to, and including, ΔFN−1,
ΔFN=FN−F1, for ΔFN,
and determining whether the Δ-values are within predefined ranges.-
7.发明公开公开(公告)号：US20230341476A1
公开(公告)日：2023-10-26
申请号：US17789422
申请日：2021-01-08
发明人： Lukas Bitschnau , Horst Schedler
IPC分类号： G01R31/333 , G01R31/327 , G01R31/62 , G01R17/10
CPC分类号： G01R31/62 , G01R17/10 , G01R31/3274 , G01R31/3333
摘要： A high current source (200) for a test system for testing an electric power device (30) comprises a first plurality of first switchable half-bridges (212) and a second plurality of second switchable half-bridges (222), which are connected in parallel and by means of which a test current is redundantly distributed. A control device (280) is designed to control the first and second half-bridges (212, 222) on the basis of an input signal in such a way that an output signal for the test current, which corresponds to the input signal, is applied across a bridge branch (230) between the first switchable half-bridges (212) and the second switchable half-bridges (222).
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公开(公告)号：US11798733B2
公开(公告)日：2023-10-24
申请号：US17465987
申请日：2021-09-03
发明人： Nikolay Tal , Tzachi Glovinsky
CPC分类号： H01F27/323 , G01R29/20 , G01R31/62 , H01F27/36
摘要： Systems, apparatuses, and methods are described for a transformer supporting two or more sets of windings electrically connected to different voltage levels. Use of stress control materials or composite materials (comprising a matrix and filler) may direct electrical fields caused by the different voltage levels to have a lowered electrical field amplitude.
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公开(公告)号：US20230280415A1
公开(公告)日：2023-09-07
申请号：US18114694
申请日：2023-02-27
发明人： Prasad Arvind Venikar , Bubathi Muruganantham , Mugdha Vyankatesh Limaye , Bibhudatta Patnaik , Mark Andre Faulkner , Travis Vernon Spoone , Robert Edward Page , Antonio Romero Oruga
IPC分类号： G01R31/62
CPC分类号： G01R31/62
摘要： A system includes a monitoring module configured to: receive a first indication related to a three-phase input of a three-phase AC electrical asset; receive a second indication related to a three-phase output of the three-phase AC electrical asset; determine performance metrics for the three-phase AC electrical asset based on the first indication and the second indication; determine error metrics by comparing each determined performance metrics to a pre-determined estimated performance metric; compare each of the error metrics to one of a plurality of pre-determined thresholds, the thresholds being determined when the three-phase AC electrical asset is in a healthy condition; and determine whether a developing fault condition exists in the three-phase AC electrical asset based on the comparison.
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10.发明授权公开(公告)号：US11747405B2
公开(公告)日：2023-09-05
申请号：US16976469
申请日：2019-02-26
申请人： Robert Bosch GmbH
发明人： Samarjit Das , Joseph Szurley
CPC分类号： G01R31/62 , G06N3/08 , H02J13/00002
摘要： An audio and vibration based power distribution equipment condition monitoring system and method is provided. The system includes an intelligent audio analytic (IAA) device and a sensing assembly. The IAA device has computer executable instructions such as an audio data processing algorithms configured to identify and predict impending anomalies associated with one or more power distribution equipment using one or more neural networks.
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