Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Siemens is trendsetter with process bus for protection devices in power transmission grids

25.08.2014

Siemens Smart Grid Division is stepping up the development of process bus technology in the high voltage power transmission grid with a new process bus input card for their Siprotec 5 series of protection devices and a newly developed input/output unit (merging unit).

The process bus has advantages especially in the high-voltage area where protection devices are normally installed at some distance from the instrument transformers. The merging units can be mounted near the instrument transformers and can be connected to the protection devices via fiber-optic Ethernet connections instead of via copper cable as at present. This not only reduces cabling and maintenance costs but cuts costs for installation and for the actual cable. The process bus technology also increases the flexibility of the protection system.

Without the process bus, the protection devices are connected to the instrument transformers directly with copper cables. Since this has to be done for every single signal, it increases the amount of wiring necessary in the switching station. This can be reduced by using process bus technology. With classic protection devices the process data is measured directly in the protection device via a special input card. This analog input card consists of an input circuit, an analog-digital converter and a bus connection to the CPU. All these connection terminals are located inside the device and are manufacturer-specific.

With Siemens process bus technology, the input card is separated from the CPU of the protection device and the range of the bus is extended from a few centimeters to as much as two kilometers. This separation creates two devices. The existing analog input card and the bus connection form the merging unit which can now be installed close to the instrument transformer and thanks to the process bus well away from the protection device. The protection device has been fitted with a process bus input, and the former input card is no longer used. The communications interface between merging unit and protection device has been standardized in IEC 61850-9-2 in order to create the necessary interoperability.

... more about:
»Ethernet »Grid »Grids »Smart »connection »copper »technologies

Process bus technology allows the merging unit to be installed close to the instrument transformer, which reduces the length of the copper connecting cable between the transformer and merging unit. The merging unit is equipped on the output side with fiber-optic Ethernet ports and the connection between merging unit and protection device is provided by fiber-optic cables. Instead of wiring the analog transformer inputs to the protection device as in the past, with the process bus the merging unit is connected close to the transformer, and the collected data distributed from there via Ethernet.

The process bus also increases the flexibility of the protection system. Using Ethernet as the communication channel, telegrams from more than just one protection device can be received and processed by the same merging unit without the need for additional cabling. This additionally reduces the cabling work necessary in the entire system. Expansion of the system is also possible without great cost and effort. An additional protection device can be installed in the switching station by inserting a cable to the Ethernet communications interface. Since the added protection device is usually at the same location as the other devices, the process bus infrastructure is already in place there. This means that the only cabling required for the new device is for connecting it to the system.

Automation of switchgear in accordance with IEC 61850-8-1 is state of the art today. The binary data that used to be transmitted between protection devices via directly wired, discrete binary inputs and outputs is now replaced by Goose messages (Generic object oriented substation events). This technology already reduces the number of copper cables and is widely used. The success of Goose messages in replacing copper cables has shown how successfully Ethernet technologies can improve the effectiveness and reliability of energy automation systems. The reduction of copper cables, and higher system reliability and security at substations will also help pave the way for the process bus.

Energy-efficient, eco-friendly solutions for setting up intelligent power supply networks (Smart Grids) and the associated service are part of Siemens' Environmental Portfolio. Around 43 percent of its total revenue stems from green products and solutions. That makes Siemens one of the world's leading providers of eco-friendly technology.

The Siemens Infrastructure & Cities Sector (Munich, Germany), with approximately 90,000 employees, focuses on sustainable and intelligent infrastructure technologies. Its offering includes products, systems and solutions for intelligent traffic management, rail-bound transportation, smart grids, power distribution, energy efficient buildings, and safety and security. The Sector comprises the divisions Building Technologies, Low and Medium Voltage, Mobility and Logistics, Rail Systems and Smart Grid. For more information please visit http://www.siemens.com/infrastructure-cities

The Siemens Smart Grid Division (Nuremberg, Germany) offers power providers, network operators, industrial enterprises and cities an end-to-end portfolio with products and solutions to develop intelligent energy networks. Smart Grids enable a bidirectional flow of energy and information. They are required for the integration of more renewable energy sources in the network. In addition, power providers can run their plants more efficiently with data gained from Smart Grids. Software solutions that analyze data from Smart Grids will continuously gain importance. Thereby, the division uses in-house developments in addition to systems from software partners. For further information please see: http://www.siemens.com/smartgrid

Reference Number: ICSG201408051e

Contact

Mr. Dietrich Biester
Smart Grid Division

Siemens AG

Gugelstr. 65

90459   Nuremberg

Germany

Tel: +49 (911) 433-2653

Dietrich Biester | Siemens Infrastructure & Cities

Further reports about: Ethernet Grid Grids Smart connection copper technologies

More articles from Power and Electrical Engineering:

nachricht How protons move through a fuel cell
22.06.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

nachricht Fraunhofer IZFP acquires lucrative EU project for increasing nuclear power plant safety
21.06.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>