Abb Oy

Jukka Nurmi

Pekka Rantanen

Aaro Pallasmaa

Hannu Haapaniemi

Mikko Paakkinen

Matti T Jussila

An alternating current conversion method and system are disclosed that can adapt to varying voltages of the direct current sources. An exemplary system includes a first and second connection arrangements for the voltage sources such that the direct current can be supplied to the DC/AC converter selectively in the first connection arrangement or the second connection arrangement. The selection between the first and second connection arrangements is made on the basis of the voltage levels of the voltage sources such that a proper voltage is supplied to the DC/AC converter. The numbers of the voltage sources in the connection arrangements are selected such that the first and second connection arrangements have different numbers of the voltage sources connected in series, the voltage sources being also grouped in parallel groups.

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Helsinki, Finland

Jukka Nurmi