-
公开(公告)号：US20190334351A1
公开(公告)日：2019-10-31
申请号：US16461893
申请日：2016-11-18
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A method for synchronization of first and second microgrids, having respective first and second voltages and frequencies. The method includes determining a possible voltage and frequency range, determining an overlapping voltage range, determining an overlapping frequency range, selecting a third voltage within the overlapping voltage range. The method also includes selecting a third frequency within the overlapping frequency range. The method also includes controlling the first microgrid to change from the first voltage and frequency to the third voltage and frequency. The method also includes controlling the second microgrid to change from the second voltage and frequency to the third voltage and frequency. The method also includes connecting the first and second microgrids to each other by closing a switch there between.
-
公开(公告)号：US10122163B2
公开(公告)日：2018-11-06
申请号：US15542354
申请日：2015-01-30
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Bertil Berggren , Giovanni Velotto , Tomas Jonsson , Soubhik Auddy , Jenny Josefsson
Abstract: The invention concerns a switchyard for interconnecting direct current power networks and a direct current power transmission system comprising such a switchyard. The switchyard comprises a number of interconnected entities comprising at least two main circuit breakers and a number of transfer switches, where each network has two connections to the switchyard, at least one via a transfer switch, each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker and at least one via a transfer switch, and each network is joined with every other network via a corresponding path through at least one main circuit breaker as well as via a corresponding path bypassing all main circuit breakers.
-
公开(公告)号：US20180054055A1
公开(公告)日：2018-02-22
申请号：US15522524
申请日：2014-11-04
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Joydeep Mukherjee , Eyke Liegmann
CPC classification number: H02J3/06 , H02J3/32 , H02J3/38 , H02J3/381 , H02J2003/388
Abstract: A control method performed in a microgrid. The microgrid includes at least one electrical power source and/or configured for injecting electrical power into the microgrid, a first point of common coupling (PCC) configured for allowing a first power flow between the microgrid and a first power grid, and a second PCC configured for allowing a second power flow between the microgrid and a second power grid. The method includes obtaining information about a change in the first power flow, and controlling the second power flow based on the obtained information.
-
公开(公告)号：US09660453B2
公开(公告)日：2017-05-23
申请号：US15124091
申请日：2014-03-07
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
CPC classification number: H02J3/381 , H02J3/14 , H02J3/46 , H02J2003/388 , Y02P80/14
Abstract: A method of controlling a microgrid including at least one distributed generator (DG) and arranged for being connected to a power grid, by means of a converter via which the DG is connected in said microgrid. The method includes running the converter in a current control mode for controlling at least one current output of the DG in the microgrid; obtaining an indication that the converter should change from the current control mode towards a voltage control mode for controlling a voltage output of the DG in the microgrid; and entering the converter in an interstate mode, in response to the obtained indication, in which interstate mode the converter is configured for controlling both the current output and the voltage output.
-
公开(公告)号：US20220337051A1
公开(公告)日：2022-10-20
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
IPC: H02H7/26
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.
-
Patent Agency Ranking
公开(公告)号：US11031773B2
公开(公告)日：2021-06-08
申请号：US16366280
申请日：2019-03-27
Applicant: ABB Schweiz AG
Inventor： Jiuping Pan , Chunming Yuan , Xiaobo Yang , Ritwik Majumder , Bertil Berggren , Frans Dijkhuizen
Abstract: Unique systems, methods, techniques and apparatuses of a distribution system are disclosed. One exemplary embodiment is an alternating current (AC) distribution system including a first substation including a first transformer and a protective device; a first distribution network portion coupled to the first transformer; a second substation; a second distribution network portion; a DC interconnection system coupled between the first distribution network portion and the second distribution network portion; and a control system. The control system is structured to detect a fault in the first transformer or the transmission network, isolate the first distribution network from the fault, determine a set point of the DC interconnection system, and operate the DC interconnection system using the set point so as to transfer a portion of the MVAC from the second distribution network portion to the first distribution network portion.
-
公开(公告)号：US20200343727A1
公开(公告)日：2020-10-29
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.
-
28.发明授权公开(公告)号：US10411472B2
公开(公告)日：2019-09-10
申请号：US15031124
申请日：2013-10-22
Applicant: ABB SCHWEIZ AG
Inventor： Ritwik Majumder
Abstract: A distributed method is provided for controlling electrical power in a microgrid, wherein a plurality of distributed generators supply electrical power to the microgrid, and each of the distributed generators is connected to a controller for controlling the real and reactive output power from the distributed generator. The method includes the steps of measuring, for each of the distributed generators, a voltage level at a measuring point associated with that distributed generator and forwarding the measured voltage level to the controller connected to that distributed generator; determining, for each of the controllers, a parameter value related to the received measured voltage level and/or related to a reactive current injection capacity of the distributed generator connected to that controller; communicating, from each of the controllers, its determined parameter value to each other ones of the controllers; determining a sequential order in which the controllers are to control the distributed generators to inject reactive power into the microgrid based on the communicated parameter values; and controlling the distributed generators to inject reactive power into the microgrid by means of the controllers in the determined sequential order.
-
公开(公告)号：US20190181645A1
公开(公告)日：2019-06-13
申请号：US16217870
申请日：2018-12-12
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
IPC: H02J3/38 , H02J13/00 , G05B19/042
Abstract: A method for controlling a microgrid including a plurality of assets connected in the microgrid, including loads and Distributed Generators, of which DGs at least a plurality are resources capable of being controlled in a grid forming mode for controlling the voltage and frequency in the microgrid. The method includes selecting a set of resources of the plurality of resources based on the respective location within the microgrid of each of the resources in the selected set, and activating a grid forming control mode for the resources in the selected set.
-
公开(公告)号：US10291024B2
公开(公告)日：2019-05-14
申请号：US15522524
申请日：2014-11-04
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Joydeep Mukherjee , Eyke Liegmann
Abstract: A control method performed in a microgrid. The microgrid includes at least one electrical power source and/or configured for injecting electrical power into the microgrid, a first point of common coupling (PCC) configured for allowing a first power flow between the microgrid and a first power grid, and a second PCC configured for allowing a second power flow between the microgrid and a second power grid. The method includes obtaining information about a change in the first power flow, and controlling the second power flow based on the obtained information.
-
-
-
-
-
-
-
-
-
Search Results
31
records
(took 0.023 seconds)
