公开(公告)号：US10177557B2

公开(公告)日：2019-01-08

申请号：US15735445

申请日：2015-06-12

Applicant: ABB SCHWEIZ AG

Inventor： Robert Saers ,  Lars Liljestrand ,  Tomas Tengner ,  Jesper Magnusson

IPC: H02H3/00 ,  H02H3/20 ,  H02H3/087 ,  H02H3/44 ,  B60L3/04 ,  H02H7/18 ,  H02H3/02

Abstract: A passive electronic fuse for protecting a DC application in the event of a fault includes a first leg including a first winding of a mutual inductor and a switch device connected in series, a second leg including a second winding of the mutual inductor. The first leg and the second leg are connected in parallel and a self-inductance of the second winding is lower than a self-inductance of the first winding. The second leg further includes a capacitor connected in series with the second winding of the mutual inductor, and the switch device is a thyristor or a switch device with switching properties of a thyristor.

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.

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

IPC: H02J7/00 ,  H02J3/32 ,  H02J3/36 ,  H02M7/12 ,  H02M1/00

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.

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

IPC: H02J7/00 ,  H02J3/32 ,  H02J3/36 ,  H02M7/12

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.

公开(公告)号：US10309995B2

公开(公告)日：2019-06-04

申请号：US15766718

申请日：2016-10-05

Applicant: ABB Schweiz AG

Inventor： Nilanga Abeywickrama ,  Robert Saers ,  Tord Bengtsson ,  Jonas Hedberg

IPC: G01R23/167 ,  G06F17/14 ,  H02H1/00 ,  G01R19/25

Abstract: A method of determining phasor components of a periodic waveform, wherein the method includes: a) sampling the periodic waveform, b) determining a frequency spectrum of the sampled periodic waveform by means of a frequency transform utilizing a Gaussian window function, wherein a ratio np defined by the duration of the sampling of the periodic waveform divided by the width parameter of the Gaussian window function is at least 5, c) selecting a region of the frequency spectrum containing a frequency peak defined by a group of consecutive frequency bins each being defined by a frequency value and a magnitude value, and d) determining phasor components of the periodic waveform based on the group of consecutive frequency bins.

公开(公告)号：US20180321290A1

公开(公告)日：2018-11-08

申请号：US15766718

申请日：2016-10-05

Applicant: ABB Schweiz AG

Inventor： Nilanga Abeywickrama ,  Robert Saers ,  Tord Bengtsson ,  Jonas Hedberg

IPC: G01R23/167 ,  H02H1/00 ,  G01R19/25 ,  G06F17/14

CPC classification number: G01R23/167 ,  G01R19/2506 ,  G01R19/2513 ,  G06F17/142 ,  H02H1/0092

Abstract: A method of determining phasor components of a periodic waveform, wherein the method includes: a) sampling the periodic waveform, b) determining a frequency spectrum of the sampled periodic waveform by means of a frequency transform utilizing a Gaussian window function, wherein a ratio np defined by the duration of the sampling of the periodic waveform divided by the width parameter of the Gaussian window function is at least 5, c) selecting a region of the frequency spectrum containing a frequency peak defined by a group of consecutive frequency bins each being defined by a frequency value and a magnitude value, and d) determining phasor components of the periodic waveform based on the group of consecutive frequency bins.