Control of leakage currents in systems with a plurality of parallel inverters

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United States of America Patent

PATENT NO 9866145
SERIAL NO

14238170

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Abstract

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There is described an electrical energy conversion system comprising: at least a first inverter (1) and at least a second inverter (2), whose outputs are connected in parallel; at least a first DC voltage source (PV1) connected to the input of the first inverter (1) and a second DC voltage source (PV2) connected to the input of the second inverter (2); a ground connection of the first inverter (1) and a ground connection of the second inverter (2). The ground connection of said inverters comprises a ground connection branch (1G; 2G) with a current sensor (5/1; 5/2) which supplies a signal proportional to a leakage grounding current (Ileak) measured in said ground connection branch (1G; 2G). Through the signal proportional to the leakage current measured a feedback signal is generated to control the leakage current (Ileak).

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Patent Owner(s)

  • ABB SCHWEIZ AG;ABB TECHNOLOGY AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Marcianesi, Andrea Arezzo, IT 3 69
Martini, David Valdarno, IT 20 200
Valiani, Massimo Corciano, IT 8 73

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