Multi-terminal differential protection system
    41.
    发明申请
    Multi-terminal differential protection system 审中-公开
    多端差动保护系统

    公开(公告)号:US20040090910A1

    公开(公告)日:2004-05-13

    申请号:US10292653

    申请日:2002-11-12

    Applicant: ABB Inc.

    CPC classification number: H04L12/43 H02H3/05 H02H7/261 H04B1/74 H04L12/437

    Abstract: A multi-terminal electrical differential line protection system wherein each of the terminals had a receiver and a transmitter and the receiver of each terminal is connected to the transmitter of an adjacent terminal to provide a unidirectional data communications link between all of the terminals in a ring on which communications between all of the terminals is in a first direction. Each of the terminals may also have an additional receiver and a transmitter and the additional receiver of each terminal is connected to the additional transmitter of an adjacent terminal to provide a unidirectional data communications link between all of the terminals on another ring on which the direction of communication is opposite the first direction.

    Abstract translation: 一种多终端电差分线路保护系统,其中每个终端具有接收机和发射机,并且每个终端的接收机连接到相邻终端的发射机,以在环中的所有终端之间提供单向数据通信链路 所有终端之间的通信处于第一方向。 每个终端还可以具有附加接收机和发射机,并且每个终端的附加接收机连接到相邻终端的附加发射机,以在另一环上的所有终端之间提供单向数据通信链路,其中, 沟通与第一个方向相反。

    Method and apparatus for calculating the amplitude of a complex waveform associated with a rotating machine shaft after removing the running speed frequency
    42.
    发明申请
    Method and apparatus for calculating the amplitude of a complex waveform associated with a rotating machine shaft after removing the running speed frequency 有权
    去除运行速度频率后,计算与旋转机轴相关的复杂波形幅度的方法和装置

    公开(公告)号:US20030182071A1

    公开(公告)日:2003-09-25

    申请号:US10104827

    申请日:2002-03-22

    Applicant: ABB Inc.

    CPC classification number: G01M15/12 G01H1/003 G05B2219/37435

    Abstract: A sampled data system for computing the amplitude of a singal received from a vibration sensing probe minus the fundamental frequency associated with the running speed of a rotating machinery shaft. This signal is known as the Not 1X waveform and variations in its amplitude can signal problems with bearings, rotors, cracks or mechanical looseness, and/or fluids of the rotating machine. The amplitude of the Not 1X waveform can be provided in either peak to peak amplitude, peak amplitude, absolute average or root mean square.

    Abstract translation: 一种采样数据系统,用于计算从振动感测探头接收的信号的振幅减去与旋转机械轴的运行速度相关联的基频。 该信号被称为Not 1X波形,其振幅的变化可以表明旋转机器的轴承,转子,裂纹或机械松动和/或流体的问题。 Not 1X波形的幅度可以以峰到峰幅度,峰值幅度,绝对平均值或均方根来提供。

    Method and apparatus for making a transformer core from amorphous metal ribbons
    43.
    发明申请
    Method and apparatus for making a transformer core from amorphous metal ribbons 失效
    从非晶金属带制造变压器芯的方法和装置

    公开(公告)号:US20020080000A1

    公开(公告)日:2002-06-27

    申请号:US10083182

    申请日:2002-02-26

    Inventor: Mark E. Rand

    Abstract: An amorphous magnetic core is produced by wrapping cut strips of amorphous metal about a mandrel to form a distributed gap core. The cut strips are secured to the mandrel during assembly by wrapping the strips with amorphous metal ribbons that have been weakened in predetermined areas but not fully parted. After the core has been built to its desired size, the weakened ribbons are completely parted. This method of making an amorphous magnetic core produces a tightly wound distributed gap core without the need for a belt winder or specialized strip holding devices.

    Abstract translation: 通过围绕心轴缠绕非晶金属的切割条来形成非晶磁芯以形成分布的间隙芯。 切割条在组装过程中通过将已经在预定区域中被削弱但不完全分开的非晶态金属带缠绕而固定在心轴上。 核心已经建成到所需的尺寸后,弱化的丝带完全分开。 这种制造无定形磁芯的方法产生紧密缠绕的分布式间隙芯,而不需要带式复卷机或专用条带保持装置。

    Interleaved multi-channel, multi-level, multi-quadrant DC-DC converters

    公开(公告)号:US10978948B2

    公开(公告)日:2021-04-13

    申请号:US15211888

    申请日:2016-07-15

    Applicant: ABB Inc.

    Abstract: Direct-current-to-direct-current (DC-DC) power converters that include two or more multi-quadrant, multi-level, DC-DC, switching converter subcircuits, connected in parallel at respective input and output sides, so as to provide a multi-channel, multi-quadrant, multi-level configuration, are disclosed. The DC-DC power converters further include a control circuit configured to control the switching converter subcircuits so that corresponding switching semiconductors in each of the switching converter subcircuits are switched in an interleaved manner. In some embodiments, each of the switching converter subcircuits is a three-level, neutral-point-clamped, four-quadrant DC-DC converter circuit. In other embodiments, each of the switching converter subcircuits is a three-level, neutral-point-clamped, two-quadrant DC-DC converter circuit. In any of these embodiments, a filter capacitor may be connected between across a pair of output terminals at the output sides of the switching converter subcircuits.

    Secured control of circuit breakers in a digital substation

    公开(公告)号:US10365676B2

    公开(公告)日:2019-07-30

    申请号:US14700918

    申请日:2015-04-30

    Applicant: ABB Inc.

    Abstract: Methods and systems for secured control of circuit breakers in an electric power substation against undesired direct operation. Consequences of a malicious action are prevented or mitigated using a validation approach that either blocks the command or ensures a negligible effect on system operation. An example method, suitable for implementation in a monitoring device in an electric power substation, includes receiving a command to open or close a circuit breaker. In response, one or more state parameters for the electric power network that comprises the substation are then predicted, the predicted state parameters reflecting an operating state for the network under the assumption that the received command is executed. The method further comprises comparing the predicted one or more state parameters to corresponding operational limits. Execution of the command is then blocked, in response to determining that one or more of the predicted state parameters violate the corresponding operational limits.

    System and method for detecting false data injection in electrical substations

    公开(公告)号:US10305932B2

    公开(公告)日:2019-05-28

    申请号:US15386339

    申请日:2016-12-21

    Applicant: ABB Inc.

    Abstract: Unique systems, methods, techniques and apparatuses of a substation phasor data concentrator (ssPDC) is disclosed herein. One exemplary embodiment is a method for operating an electrical substation including a merging unit (MU), a phasor measurement unit (PMU), and a substation phasor data concentrator (ssPDC). The method includes receiving, with the MU and the PMU, input information corresponding to a set of electrical characteristics of the electrical substation; measuring, with the MU, the input information; measuring, with the PMU, the input information; a and estimating, with the ssPDC, electrical characteristics of the electrical substation using the received false measurement and the one of the MU measurement and the PMU measurement, determining in substantially real time the false measurement does not correspond to the set of electrical characteristics using the estimated electric characteristics, and replacing the false measurement with the received the one of the MU measurement and the PMU measurement.

    Piezo sensor
    49.
    发明授权

    公开(公告)号:US10048291B2

    公开(公告)日:2018-08-14

    申请号:US14264451

    申请日:2014-04-29

    Applicant: Eric Fauveau

    Inventor: Eric Fauveau

    Abstract: A piezo sensor having an inner conductor having an inner conductor segment, where the inner conductor segment forms a tubular sidewall having a break, and also having an interior surface and an exterior surface; a plurality of individually polarized piezoelectric members, each having an inner face and an outer face, and each inner face contacting the first conductor exterior surface, each piezoelectric member being adjacent to another on the exterior face of the inner conductor, forming sets of adjacent faces; an outer conductor having an outer conductor segment forming a tubular sidewall having a break, the outer conductor having an interior surface and an exterior surface, where the interior surface contacts the outer face of the piezoelectric members; and where the break of the outer conductor segment is alignable with adjacent faces of two of the plurality of piezoelectric members, and further being alignable with the break of the inner conductor segment.

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