Power converting apparatus

H - Electricity – 02 – M

Patent

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Details

H02M 7/17 (2006.01) H02M 7/12 (2006.01)

Patent

CA 2624254

In a power converting apparatus in which two three-phase converters (1), (2) are operated parallel to one another, the three-phase converters (1), (2) are controlled by using d- and q-axis voltage commands. DC current sensors (26), (27) detect individual output DC currents (26a), (27a) of the three-phase converters (1), (2), and a d-axis voltage command vdr for each of the three-phase converters (1), (2) is corrected in a manner that reduces a difference between the output DC currents (26a), (27a). In this way, an output imbalance between the two three-phase converters (1), (2) is corrected while decreasing limitations on arrangement of the DC current sensors (26), (27).

La présente invention concerne un convertisseur d'énergie pour faire fonctionner deux convertisseurs triphasés (1, 2) en parallèle dans lequel les convertisseurs triphasés (1, 2) sont commandés à l'aide d'une commande de tension sur l'axe dq. Les détecteurs de courant CC (26, 27) détectent des courants CC de sortie respectifs (26a, 27a) depuis les convertisseurs triphasés (1, 2) et corrigent la commande de tension sur l'axe d de chaque convertisseur triphasé (1, 2) pour réduire la différence. En conséquence, le déséquilibre de sortie entre les convertisseurs triphasés (1, 2) est corrigé tandis que la restriction sur l'agencement des détecteurs de courant CC (26, 27) est réduite.

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