Process and apparatus for the generation of transmission current signals

Abstract

A transmitter with controlled switches for use in a process for the generation of transmission current signals in an alternating current distribution network is connected to the supply network. When operated, this transmitter generates a series of current impulses. The moments in time of the generation of these current impulses and/or their duration are so chosen that the resulting transmission signal corresponds at least approximately to a desired theoretical signal. The transmitter contains at least two energy storages or energy storage devices and at least two switches for controlling the energy exchange between the two storages. These switches are so controlled that the exchange current flows through the mains, whereby the aforesaid current pulses are generated. It is thereby possible to use substantially only loss-free elements for the transmitter. The main field of application of the transmitter lies in ripple control technology, where it may be used as a transmitter in a central station (center) or as a transmitter for return signals to the center and for remote reading through the network of distributed meters with return signalling of the state of the meters to a center.