Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Smart power grid

27.03.2007
The last major blackout in Europe plunged about 10 million people into darkness: on November 4, 2006 at 10:09 in the evening, the power was cut in parts of Germany, France, Belgium, Italy, Austria and Spain, in some cases for two hours. The effects were even felt in Morocco.

It all started when a high-voltage power line was disconnected in Emsland, Lower Saxony, setting off a chain reaction throughout the grid. Many experts see the reason for this type of incident in the diversity of power-generation sources. Instead of having a small number of large power stations that feed their output into the grid in accordance with demand, the deregulation of the power-utility market has given rise to a situation where the electricity supply depends on a large number of smaller producers.

The solution to avoiding such blackouts lies in a “smart power grid”, as researchers from the Fraunhofer Energy Alliance will be demonstrating to visitors to the Hannover Fair, from April 16 to 20. Other exhibits at the Fraunhofer stand will focus on energy-saving and micro power engineering.

Thomas Schlegl, who heads the Fraunhofer Energy Alliance, prefers to see the diversity of power-generation sources in a positive light. “An intelligently managed power grid would make it possible to reduce energy costs and encourage power users to help to spread the load on the network through a flexible system of real-time pricing.” What this means in practice is demonstrated by a trial project in Stutensee, near Karlsruhe. Without increasing its capacity, the network is capable of accepting input from a larger number of distributed sources – mainly solar – thanks to intelligent control and management. “The power management system serving the community of around 100 households prevents peaks from occurring at the medium-high voltage level of the grid,” Schlegl explains. The local power utility, MVV of Mannheim, confirms that the peak load has been reduced by 35 percent as predicted.

The intelligent control system is built around a set of algorithms that provide scope for the network to adapt to demand – it takes into account how much power is being fed into the network at different points and how much is being consumed. A typical example of the way in which peaks in production capacity can be put to optimum use is illustrated by a local project undertaken by the Fraunhofer Institute for Solar Energy Systems ISE. Their project entitled “Waschen mit der Sonne”, which roughly translates as “washing laundry with the sun”, involves sending a text message to alert users at times when a generous amount of solar energy is being produced. Any-one who responded to this call to smooth out peaks in energy consumption was rewarded with a financial incentive.

In order to be able to make such offers, utilities need a sophisticated electronic communication system. This is why the Fraunhofer Energy Alliance has made energy management one of the focuses of its work. “Such systems enable the various distributed power producers in a region to be linked together to form a virtual centralized power plant,” Schlegl explains.

Power management is one way of using energy resources more efficiently. But how can power producers test new systems before they go online? At the Hannover Fair, the Fraunhofer Applications Center for Systems Technology AST and the Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT will be presenting a new laboratory that they are in the process of building up, where power grids and the concepts used to manage them can be simulated as a means of optimizing the algorithms on which they are based.

To improve the control of low-voltage power distribution networks, the ISE has teamed up with a number of European partners to draw up the concept for a Power Flow and Power Quality Management System (PoMS). This system can help to integrate the growing number of distributed generation sites into the existing power grid and manage them there. Power management can be optimized on the basis of a wide variety of criteria, including minimizing operating costs, reducing the need for surplus capacity to meet peaks in demand, and minimizing the consumption of primary energy sources.

The deregulation of the energy market has led to radical changes that confront grid operators with increasingly complex challenges. The research teams at the Fraunhofer Applications Center for Systems Technology can provide flexible, automated solutions for power management and related data communication needs – to support power producers, grid operators and their sales and marketing departments.

Monika Weiner | alfa
Further information:
http://www.ise.fraunhofer.de

More articles from Power and Electrical Engineering:

nachricht Energy-efficient spin current can be controlled by magnetic field and temperature
17.08.2018 | Johannes Gutenberg-Universität Mainz

nachricht Scientists create biodegradable, paper-based biobatteries
08.08.2018 | Binghamton University

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: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>