IMPROVEMENTS IN OR RELATING TO ELECTRICAL ASSEMBLIES FOR VOLTAGE SOURCE SUB-MODULES

摘要

In the field of high voltage direct current (HVDC) power converters an electrical assembly (10; 100) for a voltage source sub-module (70; 150) comprises a first semiconductor device module (12) which includes a plurality of first semiconductor devices (14a, 14b, 4c). The electrical assembly (10; 100) also includes an energy storage device (34) which in turn includes a plurality of energy storage sections (36a, 36b, 36c) that are configured to control the magnitude of a current portion flowing through each first semiconductor device (14a, 14b, 14c). The energy storage sections (36a, 36b, 36c) are so configured by arranging each energy storage section (36a, 36b, 36c) in isolation from the or each other energy storage section (36a, 36b, 36c) to divide a current (l_c) flowing through the energy storage device (34) into a plurality of the said current portions (11, 12, 13) and thereby cause each current portion (11, 12, 13) to flow through a respective one of the plurality of energy storage sections (36a, 36b, 36c). The energy storage sections (36a, 36b, 36c) are still further so configured by connecting each energy storage section (36a, 36b, 36c) to a respective one of the plurality of first semiconductor devices (14a, 14b, 14c) whereby each first semiconductor device (14a, 14b, 14c) conducts the corresponding said current portion (I₁, I₂, I₃).