Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Continuous electricity cable monitoring now a reality: Greater reliability at reduced cost

10.05.2005


In collaboration with KEMA, two postgraduate students from Eindhoven University of Technology have developed a device that continuously monitors cables to localize weak points in distribution networks. Data on weak point development and location enables an electricity company to pre-empt problems by timely intervention. This in turn enhances network reliability and reduces costs. With their invention, Jeroen Veen and Peter van der Wielen received in April their doctorate degree at the Eindhoven University of Technology.



Continuous monitoring

Most power network faults are down to defective distribution cables. Electricity companies therefore try to identify weak spots in cables and replace them before short circuits occur. At present, this is done by carrying out periodic checks on critical cables during maintenance shutdowns. As well as being time-consuming and expensive, this process is far from entirely reliable. In the future, however, electricity companies will be able to cheaply and continuously monitor the quality of vital cables while they remain in use, thanks to research undertaken by Jeroen Veen and Peter van der Wielen. The postgraduate duo has developed a working prototype that has now been adopted by a manufacturer.


Short-circuit

As a power cable ages, its insulation is liable to degrade. If the problem isn’t detected in time, this can result in a short circuit fault. At the points where the insulation has deteriorated most, high-frequency electrical discharges occur. These discharges generate current impulses, which travel along the cable and can be detected at the terminals. The new measuring system consists of two specially developed sensors, one at each end of the cable, which register the impulses. Data from the sensors is transmitted via a telephone line to a central server. The server analyses the data to determine whereabouts along the cable the problems are.

Arrival time

Problems are localized by working out the difference in time taken for an impulse from a fault to reach each of the sensors. The Eindhoven-based researchers have come up with a patented method for synchronization of the measurement signals. This means that the lag in impulse arrival times can be accurately determined and the fault localized. Not only is the new technique smart and cheap, it is also unique, because it is the only option so far developed for monitoring cables while they are in use. Testing of the prototype has yielded highly promising results. A deliberately induced fault in a three-hundred-meter cable was localized to within half a meter. The expectation is that the commercial system will be suitable for monitoring cables up to four kilometers long.

Xavier Theunissen | alfa
Further information:
http://www.tue.nl/pers/site/index.html

More articles from Power and Electrical Engineering:

nachricht Linear potentiometer LRW2/3 - Maximum precision with many measuring points
17.05.2017 | WayCon Positionsmesstechnik GmbH

nachricht First flat lens for immersion microscope provides alternative to centuries-old technique
17.05.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

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: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>