The three-phase transformerless inverters with graded power outputs of 500, 1000, 1500, and 2000 kilowatts achieve an efficiency level of 98.4 percent. The version with two megawatts is the most powerful transformerless device currently on the market. The top efficiency of the new Siemens inverters enables plant operators to realize a high yield when feeding into the medium-voltage grid, for instance in the case of ground-mounted PV systems and systems mounted on large roofs.
The new compact Sinvert PVS central inverters are also available in photovoltaic containers, complete with medium-voltage components. These inverters will be presented for the first time at Intersolar Europe in Munich on Siemens' booth B4.310. The efficiency level, which is 0.2 percent higher than that of comparable products, enables a considerably higher yield to be achieved throughout the operating period of a photovoltaic system. With the master/slave technique it is possible not only to increase plant availability, but also to attain a longer plant service life. Furthermore, the efficiency level is higher than that of a stand-alone system, as the inverters can be switched in and out as required, depending on solar radiation. The efficiency of the solar plant can thus be optimized, particularly in the case of partial-load operation: the plant starts up even at low solar radiation, and reaches very high efficiency levels even in the lower performance range. As the inverter sub-unit with the fewest operating hours is always controlled as the master, this enables the operating time to be evenly distributed between the inverters, which will prolong the service life of the plant.
The new Sinvert PVS inverter series can be easily integrated into Scada systems through standardized communication interfaces. A pixel-graphics display with touch screen enables user-friendly local operation of the inverters and visualization of the performance data. The new devices comply with the medium-voltage guidelines of the German Association of Energy and Water Industries with all requirements including FRT (Fault Ride Through) and active power control.
The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 207,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2009 total sales of approximately €35 billion.The Siemens Industry Automation Division (Nuremberg, Germany) is a worldwide leader in the fields of automation systems, industrial controls and industrial software. Its portfolio ranges from standard products for the manufacturing and process industries to solutions for whole industrial sectors that encompass the automation of entire automobile production facilities and chemical plants. As a leading software supplier, Industry Automation optimizes the entire value added chain of manufacturers – from product design and development to production, sales and a wide range of maintenance services. With around 39,000 employees worldwide (September 30), Siemens Industry Automation achieved sales of €7.0 billion in fiscal year 2009.
Researchers pave the way for ionotronic nanodevices
23.02.2017 | Aalto University
Microhotplates for a smart gas sensor
22.02.2017 | Toyohashi University of Technology
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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09.02.2017 | Event News
23.02.2017 | Physics and Astronomy
23.02.2017 | Earth Sciences
23.02.2017 | Life Sciences