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|Illustration © Siemens|
Siemens sets a standard
The European Committee for Electrotechnical Standardization, CEN/CENELEC, has completed the standardization process with the publication of the CX1 standardization documents CLC/TS 50590 and CLC/TS 52056-8-7. With this step, Siemens has positioned CX1 as the universal international standard for powerline communication (PLC) that can be used independently of frequency band in medium and low-voltage networks.
"With the positioning of our CX1 standard, we are pursuing the goal of supporting the rapid introduction of smart metering technologies in smart grids based on a reliable, economical transmission technology," said Thomas Zimmermann, CEO of the Siemens Smart Grid Solutions & Services Business Unit.
Intelligent power supply grids, also referred to as smart grids, are designed to increase efficiency and to compensate for the highly fluctuating power that is fed from solar, wind, and biogas plants into the existing power supply networks. To accomplish this, a large number of sensors and actuators must be installed in the supply networks and linked using communication technology. Along with grid sensors that are installed in the grid to record grid status data, smart meters can be used as information and communication gateways in households. In addition to recording energy consumption data, the devices also collect information about network quality and then relay the information to the utility company's energy management system.
This data can then be used to control the power supply grid. Distribution line carrier communication protocols (DLC) such as Siemens CX1 use the existing power lines to transmit information relating to consumption and the grid. For economic reasons, many utility companies choose to use DLC communication protocols to save the additional investment costs associated with providing an additional communications infrastructure.
Developed by Siemens in
Austria, CX1 is a communications protocol that is based on spread spectrum
modulation, in which multiple frequencies within the same frequency band
are used simultaneously to transmit a single signal. This means that
interference, which often occurs at certain frequencies, has only a
negligible effect on signal transmission. In addition, through automatic
routing of the communications links, the communications protocol can
handle any change in the physical communication parameters of a
low-voltage power supply grid, such as signal attenuation, noise, network
disruption and signal coupling, as well as operational changes in network
implemented the CX1 standard in AMIS, a smart metering solution that is
currently being rolled out nationwide by a large Austrian distribution
system operator. In what is currently the largest CX1 installation
worldwide, more than 150,000 end devices have already been installed in
households. Thanks to the extremely high communications availability, the
recorded smart metering measurement values are transferred to the control
center with an extremely high degree of fulfillment. CX1 is the latest
generation DLC communications protocol and is already being used in