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公开(公告)号：US11251619B2
公开(公告)日：2022-02-15
申请号：US16618666
申请日：2017-06-01
Applicant: ABB Schweiz AG , Hitachi Energy Switzerland AG
Inventor： Ritwik Majumder
IPC: H02J3/28 , G05B19/042 , H02J3/38 , H02J13/00
Abstract: A method performed by a network controller of an electrical microgrid having a plurality of energy storages. Each of the energy storages is associated with a respective storage controller. The method includes receiving information about a measurement made at a remote location in the microgrid. The method also includes obtaining respective participation factors in respect of the remote location for each of at least a first energy storage and a second energy storage of the plurality of energy storages. The method also includes obtaining respective states of charge for each of the at least first and second energy storages. The method also includes, for each of the at least first and second energy storages, calculating a reference value for the energy storage, and sending the reference value to the storage controller with which the energy storage is associated. The calculating includes calculating the reference value based on the obtained participation factors and the obtained states of charge.
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公开(公告)号：US11121543B2
公开(公告)日：2021-09-14
申请号：US16236889
申请日：2018-12-31
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Frans Dijkhuizen , Bertil Berggren
Abstract: Unique systems, methods, techniques and apparatuses of fault mitigation are disclosed. One exemplary embodiment is a fault mitigation system for a medium voltage alternating current (MVAC) distribution network including a direct current (DC) link and a control system. The DC link is coupled to a first feeder line and a second feeder line. The control system is structured to determine a first feeder line is deenergized, operate the DC link so as to receive MVAC from a second feeder line and output low voltage alternating current (LVAC) to the first feeder line, operate a plurality of isolation devices, measure the LVAC in response to operating the plurality of isolation devices, determine a fault is isolated from a healthy portion of the first feeder line using the received LVAC measurements, and reenergize the healthy portion of the first feeder line.
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公开(公告)号：US20200235578A1
公开(公告)日：2020-07-23
申请号：US16618666
申请日：2017-06-01
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
IPC: H02J3/28 , H02J3/38 , H02J13/00 , G05B19/042
Abstract: A method performed by a network controller of an electrical microgrid having a plurality of energy storages. Each of the energy storages is associated with a respective storage controller. The method includes receiving information about a measurement made at a remote location in the microgrid. The method also includes obtaining respective participation factors in respect of the remote location for each of at least a first energy storage and a second energy storage of the plurality of energy storages. The method also includes obtaining respective states of charge for each of the at least first and second energy storages. The method also includes, for each of the at least first and second energy storages, calculating a reference value for the energy storage, and sending the reference value to the storage controller with which the energy storage is associated. The calculating includes calculating the reference value based on the obtained participation factors and the obtained states of charge.
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公开(公告)号：US20200212679A1
公开(公告)日：2020-07-02
申请号：US16236873
申请日：2018-12-31
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Frans Dijkhuizen , Bertil Berggren
IPC: H02J3/36
Abstract: Systems, methods, techniques, and apparatuses of a medium voltage alternating current (MVAC) network are disclosed. One exemplary embodiment is a direct current (DC) interconnection system for an MVAC distribution network including an AC/AC power converter including a first AC terminal and a second AC terminal; a plurality of switching devices structured to selectively couple a first AC terminal to a plurality of feeder line points in the MVAC network; and a control system structured to receive a set of measurements, calculate a headroom value for each feeder line point using the set of measurements, select a first feeder line point using the calculated headroom values, operate the plurality of switching devices so as to couple the first AC terminal to the first feeder line point, and operate the AC/AC power converter so as to transmit MVAC power from the first AC terminal to the first feeder line point.
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公开(公告)号：US10389123B2
公开(公告)日：2019-08-20
申请号：US16071769
申请日：2016-03-03
Applicant: ABB Schweiz AG
Inventor： Robert Saers , Ritwik Majumder , Antonis Marinopoulos
IPC: G05D17/00 , H02J3/06 , H01F27/00 , H02J3/38 , G01R19/25 , G01R31/02 , G05B13/04 , H02J3/14 , H02J3/00 , G05B19/042
Abstract: A method for controlling power in a microgrid that includes power sources, loads and at least one connection to a main grid where a transformer is arranged to transfer electric power between the microgrid and the main grid is disclosed. The method includes: monitoring the power balance within the microgrid; monitoring the transformer, including monitoring the transformer temperature; and detecting a need for overloading the transformer based on the power balance within the microgrid. Especially, the method includes: determining a load profile for the transformer based on the power balance within the microgrid; determining a prognosis of the transformer temperature based on the load profile; and determining a schedule for power control of the microgrid, which determining of a schedule for power control includes analyzing the prognosis of the transformer temperature.
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Patent Agency Ranking
公开(公告)号：US11862975B2
公开(公告)日：2024-01-02
申请号：US17758528
申请日：2020-01-10
Applicant: ABB Schweiz AG
Inventor： Bertil Berggren , Ritwik Majumder , Lidong Zhang
IPC: H02J3/06
CPC classification number: H02J3/06
Abstract: A method for transferring power between medium voltage feeders via a direct current link in a power distribution network includes setting an iteration step value for each of a set of power reference quantities of the link, setting an initial value of each reference quantity, iteratively changing values of each reference quantity, and selecting one changed value of the set by: changing a present value of each reference quantity with the set iteration step value into a new value, measuring a total active power at a substation of the power distribution network for each new value, and selecting the new value that provides the lowest measured total active power at the substation. A next iteration is performed with the selected new value as present value for the one of the set of power reference quantities and with the present value for the other of the set of power reference quantities.
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公开(公告)号：US11811219B2
公开(公告)日：2023-11-07
申请号：US17753155
申请日：2019-08-28
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Bertil Berggren , David Schaeffer , Lidong Zhang , Frans Dijkhuizen
CPC classification number: H02H7/268 , H02J3/0073 , H02J3/36
Abstract: A method for restoration of a fault isolation in a medium voltage, MV, network having a plurality of feeders and a plurality of normally open, NO, switches possibly in parallel with MV direct current, DC, links is presented. The method is performed in a control device of the MV network. The method includes closing at least two NO switches in parallel with MVDC links of the plurality of NO switches, being connected to a fault isolated feeder of the plurality of feeders of the MV network, and opening the closed at least two NO switches in parallel with MVDC links except one. A control device, a computer program and a computer program product for restoration of a fault isolation in a MV network are also presented.
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公开(公告)号：US10971934B2
公开(公告)日：2021-04-06
申请号：US16236873
申请日：2018-12-31
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Frans Dijkhuizen , Bertil Berggren
Abstract: Systems, methods, techniques, and apparatuses of a medium voltage alternating current (MVAC) network are disclosed. One exemplary embodiment is a direct current (DC) interconnection system for an MVAC distribution network including an AC/AC power converter including a first AC terminal and a second AC terminal; a plurality of switching devices structured to selectively couple a first AC terminal to a plurality of feeder line points in the MVAC network; and a control system structured to receive a set of measurements, calculate a headroom value for each feeder line point using the set of measurements, select a first feeder line point using the calculated headroom values, operate the plurality of switching devices so as to couple the first AC terminal to the first feeder line point, and operate the AC/AC power converter so as to transmit MVAC power from the first AC terminal to the first feeder line point.
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公开(公告)号：US10819112B1
公开(公告)日：2020-10-27
申请号：US16366118
申请日：2019-03-27
Applicant: ABB Schweiz AG
Inventor： Jiuping Pan , Chunming Yuan , Xiaobo Yang , Ritwik Majumder , Bertil Berggren , Frans Dijkhuizen , David Schaeffer
Abstract: Systems, methods, techniques and apparatuses of feeder line fault response are disclosed. One exemplary embodiment is a method for operating an alternating current (AC) distribution network including a first feeder line, a second feeder line, and a third feeder line. The method includes isolating a faulted portion of the first feeder line from a healthy portion of the first feeder line; closing a tie switch coupled between the healthy portion and the second feeder line in response to isolating the faulted portion from the healthy portion; determining the second feeder line is experiencing an overload condition after closing the tie switch; and transferring AC power including transferring AC power using a direct current (DC) interconnection system coupled to the third feeder line effective to remove the overload condition from the second feeder line.
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公开(公告)号：US20200212668A1
公开(公告)日：2020-07-02
申请号：US16236889
申请日：2018-12-31
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Frans Dijkhuizen , Bertil Berggren
Abstract: Unique systems, methods, techniques and apparatuses of fault mitigation are disclosed. One exemplary embodiment is a fault mitigation system for a medium voltage alternating current (MVAC) distribution network including a direct current (DC) link and a control system. The DC link is coupled to a first feeder line and a second feeder line. The control system is structured to determine a first feeder line is deenergized, operate the DC link so as to receive MVAC from a second feeder line and output low voltage alternating current (LVAC) to the first feeder line, operate a plurality of isolation devices, measure the LVAC in response to operating the plurality of isolation devices, determine a fault is isolated from a healthy portion of the first feeder line using the received LVAC measurements, and reenergize the healthy portion of the first feeder line.
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