公开(公告)号：WO2019011848A1

公开(公告)日：2019-01-17

申请号：PCT/EP2018/068525

申请日：2018-07-09

Applicant: ABB SCHWEIZ AG

Inventor： AGGELER, Daniel ,  PAATERO, Esa-Kai ,  FURLAN, Ivan ,  NOTARI, Nicola ,  MARET, Yannick

IPC: G01R31/02

Abstract: The present invention provides a method for detecting a ground fault (60) in a battery (22) of a uninterrupted power supply (10, 40), the battery (22) comprises at least one string (26) with multiple battery cells, the method comprising the steps of defining multiple individual battery blocks (28) of battery cells along the at least one string (26), performing an reference impedance measurement for the multiple individual battery blocks (28) at a first point of time, performing a verification impedance measurement for the multiple individual battery blocks (28) at a second point of time, evaluating a change of measured impedance between the reference impedance and the verification impedance for the multiple individual battery blocks (28) of the at least one string (26), and identifying a ground fault (60) based on a correlated change of measured impedance of the multiple individual battery blocks (28) along the at least one string (26). The present invention also provides a battery management system (36) for managing a battery (22) of a uninterrupted power supply (10, 40), which is adapted to perform the above method. The present invention further provides a UPS device (10) and a UPS system (40), each of which comprising an above battery management system (36).

公开(公告)号：WO2018146174A1

公开(公告)日：2018-08-16

申请号：PCT/EP2018/053128

申请日：2018-02-08

Applicant: ABB SCHWEIZ AG

Inventor： MARET, Yannick ,  AGGELER, Daniel ,  PAATERO, Esa-Kai ,  ZURFLUH, Franz ,  FURLAN, Ivan ,  NOTARI, Nicola

IPC: G01R31/36

CPC classification number: G01R31/389 ,  G01R31/3842 ,  G01R31/392 ,  G01R31/396

Abstract: The present invention provides a method for monitoring a battery (22) connected to a UPS device (10), the UPS device (10) comprising a central DC link (12), a power supply side AC/DC converter (14), a power supply side DC/DC converter (16), and a load side output converter (18), whereby all converters (14, 16, 18) are connected to the DC link (12), and the DC/DC converter (16) is connected to the battery (22) at its power supply side, comprising the steps of generating at least one current pulse (42) through the battery (22) using the DC/DC converter (16), measuring a voltage and current across the battery (22) as response to the at least one current pulse (42), and determining at least one battery parameter based on the voltage and current measured across the battery (22) as response to the at least one current pulse (42). The present invention also provides a UPS device (10) comprising a central DC link (12), a power supply side AC/DC converter (14), a power supply side DC/DC converter (16), and a load side output converter (18), whereby all converters (14, 16, 18) are connected to the DC link (12), and the DC/DC converter (16) is connected to the battery (22) at its power supply side, wherein the UPS device (10) is adapted to perform the above method.

公开(公告)号：EP4106174A1

公开(公告)日：2022-12-21

申请号：EP21180063.6

申请日：2021-06-17

Applicant: ABB Schweiz AG

Inventor： SCHWEIZER, Mario ,  FURLAN, Ivan ,  NOTARI, Nicola

IPC: H02M5/458 ,  H02M1/00 ,  H02M1/08 ,  H02M7/539 ,  H02M7/217 ,  H02M1/04 ,  H02M1/10 ,  H02M1/12

Abstract: The invention relates to a converter system (100) comprising a rectifier (106) that is configured to receive a grid voltage, a DC link stage (108) that is configured to receive an output voltage of the rectifier (106) and to provide a DC link voltage for an inverter (110), and the inverter (110) that is configured to receive the DC link voltage from the DC link stage (108) and to generate an output voltage. The rectifier (106), the DC link stage (108) and the inverter (110) are connected in series. The converter system (100) comprises further a control unit (200) with a slow reference frame angle determination unit (202) that is configured to generate a slow reference frame angle θ r,slow representing an angle that is slowly following a grid phase deviation, and with a fast Phase Locked Loop (PLL 208) that is configured to generate a fast reference frame angle θ r,fast representing an angle that is fast following a grid phase deviation. The control unit (200) is further configured to use the slow reference frame angle θ r,slow and the fast reference frame angle θ r,fast to control the rectifier output current, and to use the fast reference frame angle θ r,fast to control the inverter output voltage and to synchronize the inverter output voltage with the grid voltage.