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公开(公告)号：US20230132007A1
公开(公告)日：2023-04-27
申请号：US17758528
申请日：2020-01-10
Applicant: ABB Schweiz AG
Inventor： Bertil Berggren , Ritwik Majumder , Lidong Zhang
IPC: H02J3/06
Abstract: A method for transfer of power between medium voltage, MV, feeders via a MV direct current, MVDC, link in a power distribution network is presented. The method is performed in a controller in the power distribution network and includes setting an iteration step value for each of a set of power reference quantities of the MVDC link, and setting an initial value of each of the set of power reference quantities, iteratively changing values of each of the set of power reference quantities, and selecting one changed value of the set of power reference quantities by: changing a present value of each of the set of power reference quantities, one at a time, with the set iteration step value, respectively, into a new value, and measuring a total active power at a substation of the power distribution network for each of the new value, one at a time, and selecting the new value of the one of the set of power reference quantities that provides the lowest measured total active power at the substation, wherein 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. A controller for transfer of power between MV feeders via a MVDC link in a power distribution network is also presented.
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公开(公告)号：US20200313423A1
公开(公告)日：2020-10-01
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
IPC: H02H7/26
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.
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公开(公告)号：US09673628B2
公开(公告)日：2017-06-06
申请号：US15304747
申请日：2014-04-17
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A microgrid having a plurality of electrical phases A, B & C. The microgrid includes an energy storage connected to a first phase A and a second phase B. The microgrid also includes a first single-phase distributed generator (DG) connected to the first phase and configured for injecting power into the first phase. The microgrid also includes a second single-phase DG connected to the second phase and configured for injecting power into the second phase. The microgrid also includes a first single-phase load connected to the first phase. The microgrid also includes a second single-phase load connected to the second phase. The microgrid also includes a control system configured for controlling the microgrid such that power is redistributed from the second phase to the first phase via the energy storage.
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公开(公告)号：US20170117713A1
公开(公告)日：2017-04-27
申请号：US15129304
申请日：2014-03-24
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A method performed by a first control unit for controlling a first energy storage in a microgrid. The method includes calculating a first storage capability parameter for the first energy storage; transmitting capability information about the first storage capability parameter to a second control unit configured for controlling a second energy storage in the microgrid; receiving capability information about a second storage capability parameter for the second energy storage from the second control unit; calculating a first power sharing ratio for the first energy storage, based on the first and second storage capabilities; and sending control signals including information based on the calculated first power sharing ratio, for controlling the first energy storage to inject an amount of power (P) into the microgrid in accordance with the first power sharing ratio for correcting an observed deviation (Δf, ΔV) in the microgrid.
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公开(公告)号：US11489356B2
公开(公告)日：2022-11-01
申请号：US16460517
申请日：2019-07-02
Applicant: ABB Schweiz AG
Inventor： Bertil Berggren , Ritwik Majumder , Robert Saers , Frans Dijkhuizen
Abstract: One embodiment is a system comprising a medium voltage direct current (MVDC) link electrically coupling a first AC-DC converter and a second AC-DC converter. The first AC-DC converter is electrically coupled with a first alternating current (AC) feeder. The second AC-DC converter electrically coupled with a second AC feeder. A battery charger electrically coupled with the MVDC link via a converterless connection. A first electronic controller is operatively coupled with the first AC-DC converter. A second electronic controller is operatively coupled with the second AC-DC converter. During operation of the battery charger to charge a battery the first electronic controller is configured to control power flow between the first AC feeder and the second AC feeder and the second electronic controller is configured to control the voltage of the MVDC link.
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Patent Agency Ranking
公开(公告)号：US20210006085A1
公开(公告)日：2021-01-07
申请号：US16460517
申请日：2019-07-02
Applicant: ABB Schweiz AG
Inventor： Bertil Berggren , Ritwik Majumder , Robert Saers , Frans Dijkhuizen
Abstract: One embodiment is a system comprising a medium voltage direct current (MVDC) link electrically coupling a first AC-DC converter and a second AC-DC converter. The first AC-DC converter is electrically coupled with a first alternating current (AC) feeder. The second AC-DC converter electrically coupled with a second AC feeder. A battery charger electrically coupled with the MVDC link via a converterless connection. A first electronic controller is operatively coupled with the first AC-DC converter. A second electronic controller is operatively coupled with the second AC-DC converter. During operation of the battery charger to charge a battery the first electronic controller is configured to control power flow between the first AC feeder and the second AC feeder and the second electronic controller is configured to control the voltage of the MVDC link.
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公开(公告)号：US10199825B2
公开(公告)日：2019-02-05
申请号：US15502716
申请日：2014-08-11
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A method performed in an electrical microgrid for facilitating connection of a first and second AC power networks. The method includes, when the power networks are disconnected, from the second power network, controlling the AC frequency of the first power network based on the AC frequency of the second power network for ensuring that when the first and second networks are connected power will flow from the power network of the first and second power networks having a higher frequency to the power network of the first and second power networks having a lower frequency. The method also includes, after the controlling, connecting the first power network to the second power network, whereby power, at the instant of connecting, flows from the power network of the first and second power networks having a higher frequency to the power network of the first and second power networks having a lower frequency.
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公开(公告)号：US20180301903A1
公开(公告)日：2018-10-18
申请号：US15776722
申请日：2015-12-11
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder , Antonis Marinopoulos
IPC: H02J3/38 , H02J3/00 , H02J13/00 , H02J3/14 , G05B19/042
Abstract: A method of controlling a microgrid arrangement including a microgrid having a plurality of switches, and a plurality of Distributed Generators arranged for being connected to the microgrid. The method includes obtaining information about the microgrid arrangement. The method also includes, based on the obtained information, dynamically linking a first group of switches, of the plurality of switches, to each other. The method also includes detecting an event in the microgrid, and in response to the detection, automatically opening closed switches in the first group, whereby a first segment of the microgrid is disconnected from a second segment of the microgrid.
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公开(公告)号：US09762066B2
公开(公告)日：2017-09-12
申请号：US15129304
申请日：2014-03-24
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A method performed by a first control unit for controlling a first energy storage in a microgrid. The method includes calculating a first storage capability parameter for the first energy storage; transmitting capability information about the first storage capability parameter to a second control unit configured for controlling a second energy storage in the microgrid; receiving capability information about a second storage capability parameter for the second energy storage from the second control unit; calculating a first power sharing ratio for the first energy storage, based on the first and second storage capabilities; and sending control signals including information based on the calculated first power sharing ratio, for controlling the first energy storage to inject an amount of power (P) into the microgrid in accordance with the first power sharing ratio for correcting an observed deviation (Δf, ΔV) in the microgrid.
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公开(公告)号：US20170040800A1
公开(公告)日：2017-02-09
申请号：US15304747
申请日：2014-04-17
Applicant: ABB Schweiz AG
Inventor： Ritwik Majumder
Abstract: A microgrid having a plurality of electrical phases A, B & C. The microgrid includes an energy storage connected to a first phase A and a second phase B. The microgrid also includes a first single-phase distributed generator (DG) connected to the first phase and configured for injecting power into the first phase. The microgrid also includes a second single-phase DG connected to the second phase and configured for injecting power into the second phase. The microgrid also includes a first single-phase load connected to the first phase. The microgrid also includes a second single-phase load connected to the second phase. The microgrid also includes a control system configured for controlling the microgrid such that power is redistributed from the second phase to the first phase via the energy storage.
Abstract translation: 具有多个电相A，B和C的微电网。微电网包括连接到第一相A和第二相B的能量存储器。微电网还包括连接到第一相A和第二相B的第一单相分布式发电机（DG） 并配置为将功率注入到第一阶段。 微电网还包括连接到第二相的第二单相DG并且被配置用于将功率注入第二相。 微电网还包括连接到第一相的第一单相负载。 微电网还包括连接到第二相的第二单相负载。 微电网还包括配置用于控制微电网的控制系统，使得功率经由能量存储从第二相重新分配到第一相。
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