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公开(公告)号：WO2021001785A1
公开(公告)日：2021-01-07
申请号：PCT/IB2020/056264
申请日：2020-07-02
Applicant: ABB SCHWEIZ AG
Inventor： BERGGREN, Bertil , MAJUMDER, Ritwik , SAERS, Robert , DIJKHUIZEN, Frans
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：WO2020198561A1
公开(公告)日：2020-10-01
申请号：PCT/US2020/025151
申请日：2020-03-27
Applicant: ABB SCHWEIZ AG , PAN, Jiuping
Inventor： PAN, Jiuping , YUAN, Chunming , YANG, Xiaobo , MAJUMDER, Ritwik , BERGGREN, Bertil , DIJKHUIZEN, Frans
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 MV AC from the second distribution network portion to the first distribution network portion.
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公开(公告)号：WO2021139896A1
公开(公告)日：2021-07-15
申请号：PCT/EP2020/050566
申请日：2020-01-10
Applicant: ABB SCHWEIZ AG
Inventor： BERGGREN, Bertil , MAJUMDER, Ritwik , ZHANG, Lidong
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 (1) in the power distribution network and comprises setting (S100) an iteration step value for each of a set of power reference quantitiesof 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 (S120) 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 (S140) 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：WO2020198565A1
公开(公告)日：2020-10-01
申请号：PCT/US2020/025157
申请日：2020-03-27
Applicant: ABB SCHWEIZ AG , PAN, Jiuping
Inventor： PAN, Jiuping , YUAN, Chunming , YANG, Xiaobo , BERGGREN, Bertil , DIJKHUIZEN, Frans , SCHAEFFER, David , MAJUMDER, Ritwik
Abstract: The present disclosure relates generally to medium voltage alternating current (MV AC) distribution networks. Isolating a fault in a feeder line of an MV AC distribution network may cause a healthy portion of a feeder line to be disconnected from all power sources. Network control systems may be able to reconnect the healthy portion to another feeder line using controllable switches such as tie switching devices coupled to the end of each feeder line. Existing MV AC distribution networks suffer from a number of shortcomings and disadvantages. There remain unmet needs including increasing reconfigurability following feeder line fault response, preventing subsequent overloads after network reconfigurations, and reducing network downtime for healthy feeder line portions. For instance, conventional distribution networks do not receive power from multiple connected feeder lines after a fault response, risking an overload in a single newly connected feeder line and reducing power transfer ability. In view of these and other shortcomings in the art, there is a significant need for the unique apparatuses, methods, systems and techniques disclosed herein.
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公开(公告)号：WO2018188725A1
公开(公告)日：2018-10-18
申请号：PCT/EP2017/058560
申请日：2017-04-10
Applicant: ABB SCHWEIZ AG
Inventor： BERGGREN, Bertil , ZHANG, Lidong , SRIVASTAVA, Kailash , LARSSON, Mats
IPC: H02J3/36
CPC classification number: H02J3/36 , H02J2003/365 , Y02E60/60
Abstract: A power transmission system (100) is disclosed, comprising at least a first Alternating Current (AC) region (10) and a second AC region (20) interconnected by at least one AC power transmission line (31, 32), a DC link (40) interconnecting the first AC region (10) and the second AC region (20), and at least a first converter station (50) configured to control flow of power therethrough between the DC link (40) and the first AC region (10). The power transmission system (100) comprises a control unit (70) configured to control flow of power through the first converter station (50) between the DC link (40) and the first AC region (10) by generating a control signal based on phasor measurement entity (PME) measurements in or from the first AC region (10) and in or from the second AC region (20), respectively, in particular based on a comparison or difference between a second AC phase angle, determined based on one or more AC phasors measured in the second AC region (20), and a first AC phase angle, determined based on one or more AC phasors measured in the first AC region (10).
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Patent Agency Ranking
公开(公告)号：WO2021037357A1
公开(公告)日：2021-03-04
申请号：PCT/EP2019/072986
申请日：2019-08-28
Applicant: ABB SCHWEIZ AG
Inventor： MAJUMDER, Ritwik , BERGGREN, Bertil , SCHAEFFER, David , ZHANG, Lidong , DIJKHUIZEN, Frans
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 (NO1, NO2, NO3, NO4)possibly in parallel with MV direct current, DC, links (MVDC1, MVDC2, MVDC3, MVDC4)is presented. The method is performed in a control device (1) of the MV network. The method comprises closing (S120) 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 (S150) 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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7.发明申请
公开(公告)号：WO2020141390A1
公开(公告)日：2020-07-09
申请号：PCT/IB2019/061045
申请日：2019-12-18
Applicant: ABB SCHWEIZ AG
Inventor： MAJUMDER, Ritwik , DIJKHUIZEN, Frans , BERGGREN, Bertil
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 (160) for an MVAC distribution network (100) including an AC/AC power converter (170) including a first AC terminal (177) and a second AC terminal (179); a plurality of switching devices (163) structured to selectively couple a first AC terminal (177) to a plurality of feeder line points (122,127,132) in the MVAC network (100); and a control system (161) 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 (163) so as to couple the first AC terminal (177) to the first feeder line point, and operate the AC/AC power converter (170) so as to transmit MVAC power from the first AC terminal (177) to the first feeder line point.
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8.发明申请
公开(公告)号：WO2020141389A1
公开(公告)日：2020-07-09
申请号：PCT/IB2019/061043
申请日：2019-12-18
Applicant: ABB SCHWEIZ AG
Inventor： DIJKHUIZEN, Frans , MAJUMDER, Ritwik , BERGGREN, Bertil
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：WO2020043306A1
公开(公告)日：2020-03-05
申请号：PCT/EP2018/073469
申请日：2018-08-31
Applicant: ABB SCHWEIZ AG
Inventor： MAJUMDER, Ritwik , JOHANSSON, Nicklas , BERGGREN, Bertil
Abstract: The present disclosure relates to an electrical device (2) comprising a synchronous machine (4) having a rotatable mass and configured for being connected to an AC power grid (3), and an energy source (5) comprising a power electronics interface (7) and configured for providing synthetic inertia to the power grid. The energy source is configured for providing the synthetic inertia based on a measured property (6) of the synchronous machine.
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公开(公告)号：WO2019096367A1
公开(公告)日：2019-05-23
申请号：PCT/EP2017/079165
申请日：2017-11-14
Applicant: ABB SCHWEIZ AG
Inventor： BERGGREN, Bertil
Abstract: A method (300) in a power transmission system is disclosed. The power transmission system comprises a plurality of interconnected converter stations. A pilot feedback signal is determined (301). The pilot feedback signal is based on at least one voltage level in the power transmission system and is common for all of the converter stations. A power transmission system power flow parameter, indicative of a difference between the power flow into the power transmission system and the power flow out of the power transmission system, is determined (302). The power transmission system power flow parameter is determined based on the pilot feedback signal. For each of the converter stations, a drooped error signal is determined (304) based on the power transmission system power flow parameter. For each of the converter stations, at least one control signal is determined (307) based at least on the drooped error signal determined for the converter station.
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