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.
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
Tel: +49 (911) 433-2653
Dietrich Biester | Siemens Infrastructure & Cities
Solid progress in carbon capture
27.10.2016 | King Abdullah University of Science & Technology (KAUST)
Greater Range and Longer Lifetime
26.10.2016 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences