公开(公告)号：US10411587B2

公开(公告)日：2019-09-10

申请号：US15840737

申请日：2017-12-13

Applicant: ABB Schweiz Ag

Inventor： Li Qi ,  Helen-Xing Huang ,  Xianyong Feng ,  Jiuping Pan

IPC: H02M1/32 ,  H02M1/08 ,  H02M7/219 ,  H02M7/483

Abstract: Unique systems, methods, techniques and apparatuses of a DC fault isolation system are disclosed. One exemplary embodiment is a power conversion system comprising a converter including a midpoint connection structured to receive AC power, a first converter arm, a second converter arm, and a control system. The control system is configured to operate the converter a fault condition mode in response to a DC fault condition, wherein the fault condition mode operates at least one full bridge cell of the second converter arm so as to interrupt current flowing between the midpoint connection and the second DC bus rail and operates the first converter arm so as to allow the AC power to flow between the midpoint connection and the first DC bus rail in response to detecting the DC fault condition.

公开(公告)号：US20180166972A1

公开(公告)日：2018-06-14

申请号：US15840737

申请日：2017-12-13

Applicant: ABB Schweiz Ag

Inventor： Li Qi ,  Helen-Xing Huang ,  Xianyong Feng ,  Jiuping Pan

IPC: H02M1/32 ,  H02M7/219 ,  H02M1/08

CPC classification number: H02M1/32 ,  H02M1/08 ,  H02M7/219 ,  H02M7/483 ,  H02M2007/4835

Abstract: Unique systems, methods, techniques and apparatuses of a DC fault isolation system are disclosed. One exemplary embodiment is a power conversion system comprising a converter including a midpoint connection structured to receive AC power, a first converter arm, a second converter arm, and a control system. The control system is configured to operate the converter a fault condition mode in response to a DC fault condition, wherein the fault condition mode operates at least one full bridge cell of the second converter arm so as to interrupt current flowing between the midpoint connection and the second DC bus rail and operates the first converter arm so as to allow the AC power to flow between the midpoint connection and the first DC bus rail in response to detecting the DC fault condition.