公开(公告)号：US10256745B2

公开(公告)日：2019-04-09

申请号：US15327755

申请日：2014-11-25

Applicant: ABB SCHWEIZ AG

Inventor： Alireza Nami ,  Jiaqi Liang ,  Frans Dijkhuizen ,  Liwei Wang

IPC: H02M1/32 ,  H02M7/483 ,  H02J3/18 ,  H02M1/12

Abstract: A multilevel converter converting between AC and DC includes a phase leg having a first and a second phase arm, the first phase arm being connected between a first pole having a first potential and a first AC terminal and the second phase arm being connected between the first AC terminal and a second potential, where the phase arms include half-bridge and full-bridge cells, where each cell includes at least one energy storage element for providing the voltage contribution and cell switching units with cell switches and anti-parallel diodes for controlling the voltage contribution, where the full-bridge cells include a bypass switch controllable to bypass the corresponding energy storage element, and when a phase-to-ground fault occurs the cell switches are blocked and the bypass switches activated with a delay in relation to the blocking.

公开(公告)号：US09479076B2

公开(公告)日：2016-10-25

申请号：US14762176

申请日：2014-01-08

Applicant: ABB Schweiz AG

Inventor： Alireza Nami ,  Liwei Wang

IPC: H02M7/162 ,  H02M7/219 ,  H02M7/521 ,  H02M7/5388 ,  H02M7/483 ,  H02M1/00

CPC classification number: H02M7/162 ,  H02M7/219 ,  H02M7/483 ,  H02M7/521 ,  H02M7/5388 ,  H02M2001/0048 ,  H02M2007/4835 ,  Y02B70/1491

Abstract: It is presented a converter cell (10a; 10b) arranged to be used in a high voltage multilevel converter. The converter cell comprises: an energy storage element (16a; 16b) and a plurality of switching elements (S1, . . . , S8). The plurality of switching elements comprises at least one thyristor (S3; S8) and a plurality of transistors (S1, S2, S4; S5, S6, S7). Each one of the at least one thyristor (S3; S8) is provided in a position for a switching element in the converter cell where, during normal operation of the converter cell, the at least one thyristor is in a continuous conducting state. This reduces the power losses of the converter cell. A corresponding multilevel converter and a method are also presented.

Abstract translation: 呈现出被布置成用于高电压多电平转换器的转换器单元（10a; 10b）。 转换器单元包括：能量存储元件（16a; 16b）和多个开关元件（S1，...，S8）。 多个开关元件包括至少一个晶闸管（S3; S8）和多个晶体管（S1，S2，S4; S5，S6，S7）。 所述至少一个晶闸管（S3; S8）中的每一个设置在所述转换器单元中的开关元件的位置，在所述转换器单元的正常操作期间，所述至少一个晶闸管处于连续导通状态。 这降低了转换器电池的功率损耗。 还提出了相应的多电平转换器和方法。