公开(公告)号：US20160365787A1

公开(公告)日：2016-12-15

申请号：US15182746

申请日：2016-06-15

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Martin GESKE ,  Joerg JANNING ,  Thomas BRUECKNER ,  Roland JAKOB

IPC: H02M1/32 ,  H02H9/04 ,  H02H7/12 ,  H02M7/04 ,  H02M7/44

CPC classification number: H02M1/32 ,  H01T1/14 ,  H01T2/02 ,  H01T15/00 ,  H02H7/12 ,  H02H9/041 ,  H02M7/04 ,  H02M7/44 ,  H02M7/483 ,  H02M2001/325 ,  H02M2007/4835

Abstract: A short-circuit device and a protection method for a submodule for a power converter are disclosed. The submodule includes a bridge circuit having at least one power semiconductor branch extending between a first and a second DC voltage node and at least one controllable power semiconductor switch disposed therein to which a freewheeling diode is connected in anti-parallel, and a capacitor connected in parallel to the bridge circuit. The short-circuit device has at least one selected of the freewheeling diodes anti-parallel to the power semiconductor switches of the bridge circuit, wherein the at least one selected freewheeling diode is manufactured in press pack design and rated such that, when a fault occurs in the submodule, the at least one selected freewheeling diode breaks down due to the fault conditions and provides a durable, stable, low-impedance short circuit path between a first and a second AC voltage connection of the submodule.

Abstract translation: 公开了用于功率转换器的子模块的短路装置和保护方法。 子模块包括桥接电路，其具有在第一和第二直流电压节点之间延伸的至少一个功率半导体分支和设置在其中的至少一个可控功率半导体开关，续流二极管以反并联的方式连接， 平行于桥接电路。 所述短路装置具有与所述桥式电路的功率半导体开关反平行的至少一个选择的续流二极管，其中，所述至少一个选定的续流二极管按照印刷机组设计制造，并且被评定为当故障发生时 在子模块中，至少一个选择的续流二极管由于故障条件而分解，并且在子模块的第一和第二AC电压连接之间提供持久，稳定的低阻抗短路路径。

公开(公告)号：US20190052187A1

公开(公告)日：2019-02-14

申请号：US16078864

申请日：2017-02-24

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Martin GESKE ,  Joerg JANNING

IPC: H02M7/483 ,  H02M1/32 ,  H02M7/66

Abstract: A dual submodule is created for a modular multilevel converter, whereby the dual submodule has two interconnected submodules, whereby each submodule has an asymmetrical half-bridge circuit with two parallel bridge branches, which are connected between a first and a second terminal connection of the submodule, whereby each bridge branch is formed from a series circuit of a power semiconductor switch, and a diode, whereby the power semiconductor switch is allocated to an antiparallel free-wheeling diode, and has a capacitor, which is connected in parallel with the asymmetrical half-bridge circuit between the first and the second terminal connections of the module. The submodules are connected to each other via their AC terminals to form the dual submodule. Further, a modular multilevel converter is created, comprising a number of such dual submodules in each of its converter branches.