With an automatic load shedding technology - in other words a regulated interruption of power to consumers - the balance in a power grid can be maintained.
Siemens has developed an automatic load shedding system for the power supply of large-scale industrial plants in the oil and gas industry, helping to stabilize the networks in critical situations.
This solution is intended primarily for use in the oil and gas industries, whose drilling and production facilities are often equipped with their own power plants and grids. As in every power grid, island-capable networks must also be able to maintain a constant balance between the generation and the consumption of electricity.If the balance is disturbed - for example, if a large consumer shuts down because of a failure - the whole network can collapse in a worst case scenario. An interruption of only an hour at a large refinery or an LPG facility can already cause millions of euros in costs. Automatic load shedding prevents shutdowns by disconnecting consumers according to specific priorities until the grid obtains a level at which it can remain stable.
Other units of equipment would then fail, leading to a complete shut down. For automatic load shedding, all of the possible disruption patterns are worked out ahead. The aim is to determine which consumers need to be disconnected in order to keep the grid stable. The highest priority is to keep production running smoothly.
In other words, air conditioners, lighting, and other non-critical devices are the first to be taken offline. When a disruption occurs, the load shedding system recognizes which scenario it is dealing with based on data from the grid and shuts down the appropriate consumers in less than a tenth of a second.
Short reaction times are achieved using glass-fiber Ethernet and GOOSE-Telegramme - special communication services that enable rapid communication across the entire network. As a prerequisite, the system had to be designed according to the IEC 61850 communication standard for energy systems. This rapid shutdown is supported by dynamic load shedding in which the system determines performance reserves.
As a reserve function, additional frequency-dependent load shedding ensures the highest level of operational security. Because the new load shedding technology is based on the Siemens control system for energy systems, installation does not result in costs for additional equipment.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Summer heat for the winter
10.01.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
Illinois team advances GaN-on-Silicon for scalable high electron mobility transistors
10.01.2017 | University of Illinois College of Engineering
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Trade Fair News
16.01.2017 | Automotive Engineering
16.01.2017 | Life Sciences