公开(公告)号：US20220085600A1

公开(公告)日：2022-03-17

申请号：US17018020

申请日：2020-09-11

Applicant: ABB Schweiz AG

Inventor： Li Qi ,  Taosha Jiang ,  Antonello Antoniazzi

IPC: H02H9/02

Abstract: Systems, methods, techniques and apparatuses of high current protection are disclosed. One exemplary embodiment is a power system comprising a solid-state circuit breaker including a solid-state switching device, an energy dissipation branch, an assistive branch, and a controller. The energy dissipation branch is coupled in parallel with the solid-state switching device and includes an energy dissipation device. The assistive branch is coupled in parallel with the solid-state switching device and includes a resistor, an inductor, and a galvanic isolation switching device coupled together in series. The controller is configured to determine the solid-state circuit breaker is conducting a high magnitude current, select a continuous current limiting mode or an intermittent current limiting mode, and operate the solid-state switching device based on the selected current limiting mode.

公开(公告)号：US11101640B1

公开(公告)日：2021-08-24

申请号：US16942039

申请日：2020-07-29

Applicant: ABB Schweiz AG

Inventor： Li Qi ,  Peter Steimer ,  Liming Liu ,  Jiuping Pan

IPC: H02H7/12

Abstract: Systems, methods, techniques and apparatuses of fault protection. One exemplary embodiment is a protection system including a solid-state switching device, a galvanic isolation switching device, and a controller. The solid-state switching device is coupled between a switch arrangement of a power converter and a direct current (DC) link capacitor of the power converter. The galvanic isolation switching device is coupled between the DC link capacitor and a DC network. The controller is structured to determine a fault is occurring within the DC network, open the solid-state switching device in response to determining the fault is occurring, receive a measurement corresponding to an electrical characteristic of a fault current flowing through the galvanic isolation switching device while the solid-state switching device is open, and determine a location of the fault based on the received measurement.

公开(公告)号：US20210178918A1

公开(公告)日：2021-06-17

申请号：US16715716

申请日：2019-12-16

Applicant: ABB Schweiz AG

Inventor： Li Qi

IPC: B60L53/22 ,  H02J7/00 ,  B60L53/30

Abstract: A system for charging multiple electric vehicles is provided. The system includes a first electrical converter that supplies DC power to a ring bus. The ring bus is separated into a plurality of DC buses by electrical breakers. Second converters are connected to the ring bus and convert the DC power supply to a DC voltage suitable for charging electric vehicles connected thereto.

公开(公告)号：US20210143630A1

公开(公告)日：2021-05-13

申请号：US16682300

申请日：2019-11-13

Applicant: ABB Schweiz AG

Inventor： Yu Du ,  Li Qi ,  Tong Wu

IPC: H02H5/04 ,  H02J7/00

Abstract: According to one aspect of the present disclosure, an energy storage system includes one or more power sources, one or more energy storage components, and one or more solid state circuit breakers disposed between the one or more power sources and the one or more energy storage components such that electrical power is exchanged between the one or more power sources to the one or more energy storage components through the one or more solid state circuit breakers. The energy storage system also includes a controller configured to operate the one or more solid state circuit breakers to control current exchanged with the one or more energy storage components and protect the one or more energy storage components from the one or more power sources during a fault condition.

公开(公告)号：US09608551B2

公开(公告)日：2017-03-28

申请号：US14828079

申请日：2015-08-17

Applicant: ABB Schweiz AG

Inventor： Wen Ouyang ,  Jiaqi Liang ,  Li Qi

IPC: H02P9/10 ,  H02P9/14 ,  H02K3/16 ,  H02P9/00 ,  H02K11/04 ,  H02K1/10

CPC classification number: H02P9/006 ,  H02K3/16 ,  H02K3/20 ,  H02K11/046 ,  H02K19/10 ,  H02M1/081 ,  H02M7/1557

Abstract: Technologies for reducing peak fault output current in a DC power generation system include a generator having a reduced damper winding and a controller to control a rectifier array to generate a DC power output. In some embodiments, the generator may have no damper windings, may have damper windings including a reduced number of damper bars, and/or may have damper windings having separated end ring mounts for each damper bar. The controller is configured to control the rectifier array so as to reduce oscillations of the DC output that may be due to the reduced damper windings. To do so, the controller is configured to generate the control signal based on an oscillation component of the DC power output. For example, the controller may generate an oscillation correction signal based on the DC power output and adjust a firing angle set point of the rectifier array based on the oscillation correction signal.