Multiplex power conversion system
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorsIssei FUKASAWA, Masahiro KINOSHITA
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Abstract
A multiplex power conversion system enabling preventing a failure from spreading, with a simple configuration. The multiplex power conversion system includes a plurality of unit power converters. In the plurality of unit power converters, respective direct-current positive sides are connected. Respective direct-current negative sides are connected. Respective direct-current neutral points are not short-circuited. For example, the respective direct-current neutral points are not connected. Therefore, a failure in a power converter can be prevented from spreading.
Claims6
A multiplex power conversion system including a plurality of unit power converters, respective direct-current positive sides of the plurality of unit power converters being connected, respective direct-current negative sides of the plurality of unit power converters being connected, respective direct-current neutral points of the plurality of unit power converters being not short-circuited,
- a plurality of unit resistances respectively connected to the direct-current neutral points of the plurality of unit power converters, respectively,
- the plurality of unit resistances being divided in a plurality of groups, the number of the groups being no less than two,
- each of the groups includes a potential detection point at which respective one ends of unit resistances belonging to the group, the one ends being not connected to the direct-current neutral points of the respective unit power converters;
- and
- voltage detection means for detecting a voltage between the potential detection points included in the respective groups.
A multiplex power conversion system comprising:
- a plurality of unit resistances, respective one ends of the plurality of unit resistances being connected to the respective direct-current neutral points of the plurality of unit power converters;
- a potential detection point to which respective one ends of the plurality of unit resistances, the one ends being not connected to the direct-current neutral points of the unit power converters, are connected,
- means for detecting a voltage between the potential detection point and a direct-current positive side or a voltage between the potential detection point and a direct-current negative side,
- a plurality of unit resistances respectively connected in series to the direct-current neutral points of the plurality of unit power converters;
- and
- voltage detection means for detecting a voltage applied to at least one unit resistance of the plurality of unit resistances.
3-4. (canceled)
Dependencies are inferred from the claim text.