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
Hybrid excavator uses diesel-electric drive
25.11.2015 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
“move“ – on course for the mobility of the future
25.11.2015 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
The Fraunhofer Institute for Solar Energy Systems ISE has installed 70 photovoltaic modules on the outer façade of one of its lab buildings. The modules were...
Nerve cells cover their high energy demand with glucose and lactate. Scientists of the University of Zurich now provide new support for this. They show for the first time in the intact mouse brain evidence for an exchange of lactate between different brain cells. With this study they were able to confirm a 20-year old hypothesis.
In comparison to other organs, the human brain has the highest energy requirements. The supply of energy for nerve cells and the particular role of lactic acid...
In laser material processing, the simulation of processes has made great strides over the past few years. Today, the software can predict relatively well what will happen on the workpiece. Unfortunately, it is also highly complex and requires a lot of computing time. Thanks to clever simplification, experts from Fraunhofer ILT are now able to offer the first-ever simulation software that calculates processes in real time and also runs on tablet computers and smartphones. The fast software enables users to do without expensive experiments and to find optimum process parameters even more effectively.
Before now, the reliable simulation of laser processes was a job for experts. Armed with sophisticated software packages and after many hours on computer...
Researchers at Heidelberg University have devised a new way to study the phenomenon of magnetism. Using ultracold atoms at near absolute zero, they prepared a...
AWI researchers’ unique 15-year observation series reveals how sensitive marine ecosystems in polar regions are to change
The warming of arctic waters in the wake of climate change is likely to produce radical changes in the marine habitats of the High North. This is indicated by...
25.11.2015 | Event News
17.11.2015 | Event News
21.10.2015 | Event News
25.11.2015 | Agricultural and Forestry Science
25.11.2015 | Earth Sciences
25.11.2015 | Physics and Astronomy