In the future, the device will link the 380-kV ultra-high voltage level with the 110-kV grid in the Bruchsal-Kändelweg substation plant near Karlsruhe, Germany. Transformers are usually cooled and insulated with mineral or silicone oil.
By comparison, vegetable oils are environmentally friendlier and less flammable. Until now, Siemens has used vegetable oil insulation in power transformers with voltages of up to 123 kilovolts (kV). The new transformer is designed for 420 kV.
A transformer increases or reduces the alternating current level for transporting electricity. Due to the high currents and voltages, it heats up and must be cooled with oil.
Until now, mineral or silicone oil has been used for this purpose. These oils dissipate the heat effectively and provide good insulation against electric sparkover. However, they are harmful to the environment and are highly flammable.
Rapeseed, soy or sunflower oils, on the other hand, are biodegradable and have a much higher flashpoint. A vegetable oil transformer can therefore be operated without additional protective equipment such as collecting tanks, even in zones with strict environmental requirements. With their comparatively better fire safety class, vegetable oil transformers can even be used in densely populated residential areas.
Siemens' new transformer weighs just under 340 tons and contains 100 tons of insulating oil. The oil comes exclusively from renewable vegetable resources. As a result, the device is the world's first power transformer on the 420-kV ultra-high-voltage level that does not require proof of its water hazard classification. TransnetBW, a grid operator in the German state of Baden-Württemberg, will place the environmentally friendly transformer into operation in late July.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
New test procedure for developing quick-charging lithium-ion batteries
07.12.2017 | Forschungszentrum Jülich
Plug & Play Light Solution for NOx measurement
01.12.2017 | Heraeus Noblelight GmbH
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
08.12.2017 | Event News
07.12.2017 | Event News
05.12.2017 | Event News
11.12.2017 | Physics and Astronomy
11.12.2017 | Materials Sciences
11.12.2017 | Earth Sciences