The aim is to provide a buffer against short-term fluctuations in output from renewable energy sources. Such fluctuations can last for seconds or several minutes long. The modular designed Siestorage battery is based on lithium-ion rechargeable battery technology and fits into a normal shipping container.
In its big layout it stores 500 kilowatt-hours of electricity. That's about the average daily power consumption of 50 households. The Italian power company Enel recently switched on the first Siestorage installation, which has a capacity of one megawatt. Enel is using the installation, which is connected to its primary distribution network, to study how voltage can be stabilized.
The electrical output of photovoltaic arrays doesn't only fluctuate with the seasons or between night and day. It's also affected by local weather. For example, power production sags for a few seconds (or even minutes) if clouds drift over the modules. Consequently, the grid experiences brief drops in voltage. Energy storage devices deal with these fluctuations within milliseconds in the power grid itself. As a result, there's no need to adjust controls at power stations - a procedure that reduces efficiency and increases costs.
During development, Siemens worked together with one of the world's largest manufacturers of lithium-ion batteries. Thanks to the system's modular design, its capacity can be expanded to two megawatt hours at an output of 8 megawatts. The complete solution with the inverter module and the controller that connect the system to the grid are from Siemens.
Enel will also study how well the system can handle a controlled restart of a grid after a complete blackout. To achieve this feat, the system's inverter has to regulate the right voltage and frequency so that the grid can be powered up in a controlled manner. Such a solution would be very interesting for small independent power grids on islands or in remote areas, which would otherwise have to be connected to neighboring grids.
Energy storage systems form part of Siemens solutions for tomorrow's smart grid. They are part of Siemens' environmental portfolio, with which the company generated about €30 billion in sales in 2011.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Laser sensor LAH-G1 - optical distance sensors with measurement value display
15.08.2017 | WayCon Positionsmesstechnik GmbH
Engineers find better way to detect nanoparticles
14.08.2017 | Washington University in St. Louis
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).
The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
16.08.2017 | Physics and Astronomy
16.08.2017 | Materials Sciences
16.08.2017 | Interdisciplinary Research