MULTI-LEVEL POWER CONVERTER

摘要

This is a multi-level converter comprising one or more arms (B) to each be connected between a voltage source (VDC) and a current source (I). Each arm comprises two stages (E1, E2) in cascade, the first to be connected to the voltage source (VDC), the second to be connected to the current source (I). The first stage (Et1) comprises several elementary stages (E1n, . . . , E12, E11) of rank one to n in cascade, the elementary stage (E11) of rank one being connected to the second stage (Et2) and the elementary stage (E1n) of rank n having to be connected to the voltage source (VDC). Each elementary stage (E1n) comprises a pair of identical cells of NPC type (Cen1, Cen2) in series, the connection being direct in the elementary stage of rank 1, the connection being made via n−1 capacitive cells ((Can(1), . . . Can(n−1)) for each elementary stage of rank greater than one, the second stage (Et2) comprising a floating capacitor cell (Ce10).

主权项

1. Multi-level converter comprising one or more arms (B), configured to each be connected between a voltage source (VDC) and a current source (I),
in which the or each arm comprises two stages (E1, E2) connected in cascade with a first stage (Et1) intended to be connected to the voltage source (VDC), a second stage (Et2) intended to be connected to the current source (I), in which the first stage (Et1) comprises n elementary stages (E11, . . . , E1n) of rank one to n (n greater than one) connected in cascade, the elementary stage (E11) of rank one being connected to the second stage (Et2) and the elementary stage (E1n) of rank n being intended to be connected to the voltage source (VDC), characterized in that each elementary stage (E11, E1n) comprises a pair of identical cells of NPC type (Ce11, Ce12; Cen1, Cen2) connected in series, the connection being direct in the elementary stage (E1) of rank 1, the connection being made via n−1 capacitive cells (Can(1), Can(n−1)) for each elementary stage of rank n (n greater than one), the second stage (Et2) comprising a cell of floating capacitor type (Ce10).