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.

公开(公告)号：US10389129B2

公开(公告)日：2019-08-20

申请号：US16190926

申请日：2018-11-14

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Lidong Zhang

IPC: H02M7/48 ,  H02J3/34 ,  H02M7/5387

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronization control, wherein the method includes: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component (idref) of a reference current vector (iref) based on an active power reference (Pref) for the VSC, determining the reference current vector (iref) based on the active power producing current component (idref), determining a damping component based on a virtual damping resistance (Ra), the reference current vector (iref) and the VSC current vector (i), determining a voltage vector (v) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector (v).

公开(公告)号：US20190157870A1

公开(公告)日：2019-05-23

申请号：US16190926

申请日：2018-11-14

Applicant: ABB Schweiz AG

Inventor： Lennart Harnefors ,  Lidong Zhang

IPC: H02J3/34

CPC classification number: H02J3/34 ,  H02M7/53871

Abstract: A method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method includes: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component (idref) of a reference current vector (iref) based on an active power reference (Pref) for the VSC, determining the reference current vector (iref) based on the active power producing current component (idref), determining a damping component based on a virtual damping resistance (Ra), the reference current vector (iref) and the VSC current vector (i), determining a voltage vector (v) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector (v).

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.

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

IPC: H02J3/36 ,  H02H7/26 ,  H02J3/00

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.

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.