Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Enhanced Power Transmission for HVDC

22.11.2013
Siemens is researching new technology to enhance the efficiency of high-voltage direct-current transmission (HVDCT).

This minimizes losses during power transmission and is one of the key technologies required to make better use of renewable sources of energy for the power grid.



A research project launched by Germany's Federal Ministry of Education and Research (BMBF) aims to improve power conversion both at the beginning and the end of the HVDCT line.

Using the technologies under research, the cost of these converter stations could be cut by as much as 20 percent and power density increased by a third. Further synergies will be created when these new technologies are used in conjunction with power generated from wind turbines.

The Siemens global research unit Corporate Technology is coordinating the project. Scheduled to run for three years, "Efficient High-Performance Modules for the Electrical Energy System of the Future" (EHLMOZ) is being funded by the BMBF to the tune of €4.9 million. The remaining project partners are TU Dresden, Infineon Technologies, Curamik Electronics, Nanotest, and Fraunhofer ENAS.

In order to minimize transmission losses, HVDC converter stations convert alternating current into direct current at a very high voltage and then back again. Germany is now planning to construct 2,100 kilometers of HVDCT lines in order to transmit with minimal loss wind power from its coastline to consumers inland. Germany also intends to build further offshore wind turbines with a combined output of 25 gigawatts, scheduled for completion by 2030. This power, too, will be transmitted to the coast via HVDCT.

The latest development in the field of HVDC power conversion is modular multilevel converters. An array of insulated-gate bipolar transistors (IGBTs) and capacitors connected in series incrementally create the desired voltage. The IGBTs are exposed to high and fluctuating currents in the converters over a period of several decades.

These high currents generate considerable heat at the electrical contacts of the components. Fluctuations in current and, as a result, in temperature can cause the wire bonding to lift or solder joints to crack. In turn, short circuits lead to high peak currents that can damage the component and even neighboring modules. To guard against this risk, current systems feature additional power electronics and twin-cell housing.

Areas of research in the EHLMOZ project include new power semiconductor devices that are robust enough to enable a significant reduction in the level of protection currently required. Researchers hope that that an enhanced layout and better connection techniques with large contact surfaces will improve distribution of the thermal load. Other areas of research include measuring techniques for precisely monitoring the temperature in the module and thereby enabling a reduction in the safety margins required.

Dr. Norbert Aschenbrenner | Siemens InnovationNews
Further information:
http://www.siemens.com/innovationnews

More articles from Power and Electrical Engineering:

nachricht Engineers program tiny robots to move, think like insects
15.12.2017 | Cornell University

nachricht Electromagnetic water cloak eliminates drag and wake
12.12.2017 | Duke 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: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

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,...

Im Focus: Towards data storage at the single molecule level

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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>