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    Redundant point of common coupling (PCC) to reduce risk of microgrid's islanding
    171.
    发明授权
    Redundant point of common coupling (PCC) to reduce risk of microgrid's islanding 有权

    公开(公告)号：US09935463B2

    公开(公告)日：2018-04-03

    申请号：US14915967

    申请日：2013-09-03

    Applicant: ABB TECHNOLOGY LTD

    Inventor： Ritwik Majumder

    IPC: H02J3/38 ,  H02J3/48

    CPC classification number: H02J3/381 ,  H02J3/38 ,  H02J3/48 ,  H02J2003/388 ,  Y02P80/14

    Abstract: A microgrid connecting at least one distributed electricity generator includes a first switch configured for, in a closed position, connecting the microgrid to a first network line at a first point of common coupling (PCC) and for, in an open position, disconnecting the microgrid from the first network line at the first PCC; a second switch configured for, in a closed position, connecting the microgrid to a second network line at a second PCC, and for, in an open position, disconnecting the microgrid from the second network line at the second PCC; and a control unit configured for, when an islanding event has been detected when the second switch is in its closed position and the first switch is in its open position, acting to close the first switch, bringing it to its closed position.

    Method and a system for a fast bus transfer in an electrical power system
    172.
    发明授权
    Method and a system for a fast bus transfer in an electrical power system 有权

    公开(公告)号：US09923375B2

    公开(公告)日：2018-03-20

    申请号：US14676517

    申请日：2015-04-01

    Applicant: ABB TECHNOLOGY LTD

    Inventor： Anil Talluri ,  Gajanan Lade ,  Rahul Radhakrishnan ,  Sethuraman Ganesan

    IPC: H02J3/42

    CPC classification number: H02J3/42 ,  H02J9/062 ,  H02J2009/068 ,  Y10T307/696

    Abstract: A method for synchronizing and connecting a first sub power system with a second sub power system with an intelligent electronic device (IED) by use of at least one switching device between the first sub power system and the second sub power system in an electrical power system is provided. The IED monitors power supply parameters such as voltage magnitude, phase and other derived parameters such as voltage and phase differences in the first sub power system and the second sub power system to identify at least one instance for fast bus transfer where the two sub systems have acceptable differences in magnitude and phase. The IED performs phase shifting and voltage magnitude correction in anticipation for synchronizing power supplies on connection at the identified instance.

    Methods and devices for power compensation
    174.
    发明授权
    Methods and devices for power compensation 有权

    公开(公告)号：US09866109B2

    公开(公告)日：2018-01-09

    申请号：US14903245

    申请日：2013-07-19

    Applicant: ABB TECHNOLOGY LTD

    Inventor： Jean-Philippe Hasler ,  Marcio De Oliveira

    IPC: H02M1/42 ,  H02J3/16 ,  H02J3/18 ,  H02J3/26

    CPC classification number: H02M1/4208 ,  H02J3/16 ,  H02J3/1857 ,  H02J3/1864 ,  H02J3/26 ,  Y02E40/12 ,  Y02E40/26 ,  Y02E40/34 ,  Y02E40/50

    Abstract: A method is performed in a control device for controlling a power compensation arrangement including a voltage source converter and one or more power compensation branches, each power compensation branch including a thyristor controlled reactor, a thyristor switched reactor or a thyristor controlled capacitor. The voltage source converter and the one or more power compensation branches are connected to a same busbar. The method includes: detecting a request in an electrical power system to which the power compensation arrangement is connected; determining, based on the request, a need for reactive power supply to the electrical power system; providing reactive power by means of the voltage source converter and/or by one or more of the power compensation branches; and compensating, by means of the voltage source converter, any disturbances caused by the power compensation branches when providing the reactive power to the electrical power system. Corresponding devices are also disclosed.

    Fault location of DC distribution systems
    177.
    发明授权
    Fault location of DC distribution systems 有权

    公开(公告)号：US09800044B2

    公开(公告)日：2017-10-24

    申请号：US14725955

    申请日：2015-05-29

    Applicant: ABB Technology Ltd.

    Inventor： Li Qi ,  Xianyong Feng ,  Jiuping Pan

    IPC: H02H3/10 ,  H02H3/38 ,  H02H3/44 ,  H02H7/26 ,  G01R31/08

    CPC classification number: H02H3/10 ,  G01R31/086 ,  G01R31/088 ,  H02H3/38 ,  H02H3/445 ,  H02H7/268 ,  Y04S10/522

    Abstract: Unique systems, methods, techniques and apparatuses of fault location in DC power distribution systems are disclosed. One exemplary embodiment is a DC power distribution system including a plurality of zones each including a DC power distribution line and a protective device. Each protective device structured to sense one or more electrical characteristics of a line and to controllably open a circuit including the line. At least one intelligent electronic device is structured to determine a line inductance based upon electrical characteristics sensed by one or more of the protective devices and to evaluate a location of the line fault based upon the determined line inductance.

    Apparatus for filtering harmonics in railway contact lines and method
    178.
    发明授权
    Apparatus for filtering harmonics in railway contact lines and method 有权

    公开(公告)号：US09728962B2

    公开(公告)日：2017-08-08

    申请号：US14443284

    申请日：2012-11-15

    Applicant: ABB Technology Ltd

    Inventor： Jean-Philippe Hasler ,  Mauro Monge

    IPC: H02M7/48 ,  H02J3/01 ,  H02M1/12 ,  H02M7/483 ,  H02M7/493

    CPC classification number: H02J3/01 ,  H02M1/12 ,  H02M7/483 ,  H02M7/493 ,  H02M2007/4835

    Abstract: An apparatus and a method for filtering harmonics in a power transmission contact line of a railway system includes a multilevel converter multilevel converter having one single phase leg, which phase leg comprises switching cells, each switching cell comprises semi-conductor switches arranged to selectively provide a connection to a corresponding energy storage element. The multilevel converter also includes a controller provided to control the switching of each switching cell, and wherein the phase leg is configured in two parallel branches of cascaded switching cells, which branches is interconnected in a closed circuit. The controller is provided to monitor the content of harmonics in the contact line, and is adapted to filter the monitored harmonics by means of adapting the switching of the switching cells to absorb the harmonics.

    Power converter with oil filled reactors
    179.
    发明授权
    Power converter with oil filled reactors 有权

    公开(公告)号：US09705418B2

    公开(公告)日：2017-07-11

    申请号：US14893816

    申请日：2013-06-14

    Applicant: ABB TECHNOLOGY LTD

    Inventor： Mats Hyttinen

    IPC: H02M7/483 ,  H02M7/44 ,  H02M7/00 ,  H01B9/06

    CPC classification number: H02M7/44 ,  H01B9/0694 ,  H02M7/003 ,  H02M2007/4835

    Abstract: It is provided a power converter for transferring power between a high voltage DC connection and a high voltage AC connection. The power converter includes a power converter assembly including: a first converter arm, a first reactor, a second reactor and a second converter arm, connected serially between the positive and negative terminals of the DC connection. The high voltage AC connection is provided between the first reactor and the second reactor. Each one of the converter arms includes a plurality of converter cells and each one of the converter cells includes a switching element and an energy storage element. Both the first reactor and the second reactor are oil filled reactors.

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