Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Network Stability through Automatic Load Shedding

05.11.2012
Siemens is stabilizing the power supply systems at major industrial facilities.

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.

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.

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.

Until now, when a disruption occurred - for example, if the network frequency dropped - load shedding systems have shut down pre-determined consumers. Sometimes, this meant that too much load was shed, and the network remained out of balance.

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
Further information:
http://www.siemens.com/innovationnews

More articles from Power and Electrical Engineering:

nachricht Global boom in hydropower expected this decade
24.10.2014 | Faculty of Science - University of Copenhagen

nachricht New 3D Display Technology Promises Greater Energy Efficiency
23.10.2014 | The Optical Society

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

Comparing Apples and Oranges? A Colloquium on International Comparative Urban Research

22.10.2014 | Event News

Battery Conference April 2015 in Aachen

16.10.2014 | Event News

Experts discuss new developments in the field of stem cell research and cell therapy

10.10.2014 | Event News

 
Latest News

Precise and programmable biological circuits

24.10.2014 | Life Sciences

Desert Streams: Deceptively Simple

24.10.2014 | Earth Sciences

Modernized stainless steel continuous caster from Siemens goes on stream at Posco

24.10.2014 | Press release

VideoLinks
B2B-VideoLinks
More VideoLinks >>>