Electronic power circuit arrangement for compensating mains interferences and voltage interruptions of voltage supply network with feeding in inverter and transformer

摘要

The feeding in inverter (2) is connected with the mains network (1) across a feeding in transformer (3). A first auxiliary voltage source (4) is fed by a first auxiliary voltage (U1) and with the existence of mains interferences or voltage interruptions, to feed in a compensation voltage in to the voltage supply mains network. A filter (5) can be connected on the mains side, parallel to the transformer (3). At least one second auxiliary voltage source (6) is provided with a second auxiliary voltage (U2), which can be coupled at the feed in inverter (2), instead of the first auxiliary voltage source. The second auxiliary voltage (U2) is selected lower than the first auxiliary voltage (U1).