Line conditioner for reducing or eliminating interference.

摘要

The present invention relates to a line conditioner based on active current and voltage filters for reducing or eliminating electricity mains interference occurring on the mains network or line itself or in the customer's or subscriber's installation. It contains two active filters produced using electronic converters with high frequency switched static switches and reactive elements (capacitors and coils). One of them is dedicated to the correction of voltage interference originating in the mains network, the other to reducing current harmonics attracted by the customer's installation. Both are electrically interconnected via the line itself and some direct current busbars to which a power storage element is connected (capacitor or battery). In the event of a mains failure, two static switches isolate the equipment from the mains and from the least critical part of the load, while the current filter converter reconfigures its operating strategy and changes over to operating like an Uninterruptible Power Supply (U.P.S.), for the most critical part of the load, powered by the storage element. This returns to charging during normal operation, i.e. with the mains supply present. <IMAGE>