Abb Schweiz Ag

Abb Oy

Ville Koivula

Matti T Jussila

Linda Juvonen

Jarno Alahuhtala

Markku Järvelä

Dariusz Maciocha

Christoffer Beck

Jarno Juhani Alahuhtala

Aleksander Polit

Malgorzata Szewczyk-Jaszynska

An electrical assembly comprising power conversion system (PCM) having an output (OT), a filter device () connected to the output (OT) of the power conversion system (PCM), a pre-charging circuit (PCC), and an interface (ITF) for connecting the electrical assembly to an electrical power network (GRD). The filter device () comprises inductor system and filter capacitor system adapted to co-operate with the inductor system for filtering an alternating current. The filter device () comprises a capacitor switch device (S) for disconnecting the filter capacitor system from the inductor system. The electrical assembly comprises a grid switch device (S) connected in parallel with the pre-charging circuit (PCC). The parallel connected pre-charging circuit (PCC) and grid switch device (S) are operationally connected between the output (OT) of the power conversion system (PCM) and the interface (ITF) of the electrical assembly.

Electrical assembly comprising filter device for improving quality of electricity

Exemplary embodiments are directed to a method and switching arrangement for an inverter. The inverter including a positive direct current pole, a negative direct current pole, and a neutral direct current pole. The arrangement having a first controllable switch connected between the neutral direct current pole of the inverter and a virtual neutral point of an alternating current network supplied by the inverter; and/or a second controllable switch connected between the neutral direct current pole of the inverter and an earth potential of an alternating current network supplied by the inverter.

Switching arrangement for inverter, and inverter

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Helsinki, Finland

Ville Koivula