Verbesserungen an oder im Zusammenhang mit Kettengliedmodulen für Spannungsquellenwandler

Details

Veröffentlichungs-Nr.

EP3859965

Aktenzeichen

EP20275020

Anmeldetag

30. Januar 2020

Veröffentlichung

6. September 2023

Erteilung

6. September 2023

Rechtsraum

EP

IPC

H02M7/483H02M1/32

Abstract

In the field of chain-link modules for voltage source converters, there is a need for an improved chain-link module.A chain-link module (10), for connection in series with other chain-link modules to form a chain-link converter selectively operable to provide a stepped variable voltage source within a voltage source converter, comprises a first pair (12) of series-connected switching elements (14A, 14B) which are separated by a first connection terminal (16) and are connected in parallel with first and second series-connected energy storage devices (18, 20). The chain-link module (10) also includes a second pair (22) of series-connected switching elements (14C, 14D) that are separated by a second connection terminal (24), and which are connected in parallel with one or other of the first and second energy storage devices (18, 20). Switching of the switching elements (14A, 14B, 14C, 14D), in use, selectively:(i) directs current (I) through the first and second energy storage devices (18, 20), whereby the chain-link module (10) provides a positive voltage across the first and second connection terminals (16, 24);(ii) causes current (I) to bypass the first and second energy storage devices (18, 20) whereby the chain-link module (10) provides zero voltage; and(iii) directs current (I) through the one of the first and second energy storage devices (18, 20) with which the second pair (22) of switching elements (14C, 14D) is connected in parallel, whereby the chain-link module (10) provides a negative voltage across the first and second connection terminals (14, 24).

Anmelder

Firma

General Electric Technology GmbH

Land

🇨🇭 Schweiz

Fachgebiete