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
'Stealth' material hides hot objects from infrared eyes
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Scientists print sensors on gummi candy: creating microelectrode arrays on soft materials
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Russian researchers together with their French colleagues discovered that a genuine feature of superconductors -- quantum Abrikosov vortices of supercurrent -- can also exist in an ordinary nonsuperconducting metal put into contact with a superconductor. The observation of these vortices provides direct evidence of induced quantum coherence. The pioneering experimental observation was supported by a first-ever numerical model that describes the induced vortices in finer detail.
These fundamental results, published in the journal Nature Communications, enable a better understanding and description of the processes occurring at the...
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
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25.06.2018 | Physics and Astronomy
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25.06.2018 | Power and Electrical Engineering