Device for correcting alternating current in power electronics in electrical energy engineering, has measuring converter for converting secondary current into measuring signal, where correction filter filters primary current based on signal

摘要

The device (10) has a supply terminal (5) connecting the device to an electrical power supply network. A power line (9) connects the terminal with a load terminal (6) for conducting primary alternating current between the network and the load. Current transformers (2a, 2b) convert the current into reduced secondary alternating current. An active power factor correction filter (1) filters the primary current based on the secondary current, and a measuring converter (3) converts the secondary current into a measuring signal, where the filter filters the primary current based on the signal. An independent claim is also included for a method for correcting alternating current.