Berlin – The compactLine research and development project of transmission system operator 50Hertz took another hurdle: today, the State Administration Office of Saxony-Anhalt approved the realisation of the test line as part of the Ragow-Förderstedt-Jessen/Nord 380 kv line. compactLine is a research and development project by 50Hertz, the system operator responsible for the north and east of Germany, that seeks to realise a technical innovation: a compact overhead line designed with shorter pylons within a more narrow corridor. The test line will be constructed at the Jessen/Nord substation in Saxony-Anhalt and should be connected to the grid for trial operation in the summer of 2018. The line will consist of five pylons and have a length of about two kilometres. "Now that we have been given the green light, we have reached an important mile-stone for this innovative overhead line project", said Dr Frank Golletz, Chief Technical Officer at 50Hertz.
A representative survey among the population was taken last year and showed that the new design is met with a high level of approval. According to this sur-vey, 40 per cent of about 1,000 respondents preferred the compactLine over the classic steel lattice two-level pylon. Only seven per cent were opposed. "As the acceptance for the new pylons is clear and the testing of the individual components as well as the technical tests are going so well, we want to realise the project soon, so that in the future, we can offer a technological alternative to the classic overhead line and cables within the planning and approval proce-dures", explained Dr Golletz.
According to the plans, the first foundation works are expected to start in the fourth quarter of this year. In the spring of 2018, the pylons will be assembled and the conductors will be installed. The commissioning of the test line is planned for the summer of 2018. A subsequent monitoring phase of at least one year will test both the entire system and the individual components on a regular basis.
Since 2013, 50Hertz has been working on the compactLine project. The line should reduce the impact of high voltage transmission lines on nature and land-scape. Instead of 50 to 60 metres high steel lattice towers, the pylons will be only 30 to 36 metres in height. The corridor will be reduced in width, from the usual 72 metres to about 55-60 metres.
The company's objective for this project is to develop innovative line types that meet the requirements demanded by different landscapes and living spaces and to offer differentiated solutions within the planning and approval procedure. One of the main objectives of the project is to improve public appreciation for grid expansion projects. The City Analytics institute researched the influence of the new overhead line design on public acceptance in an empiric survey and presented the results last year during a meeting in Wittenberg. According to this survey, 40 per cent of about 1,000 respondents preferred the compactLine over the classic steel lattice two-level pylon. Only 7 per cent were opposed.
In addition to the transmission system operators, project partners include RWTH Aachen University (Rheinisch-Westfälische Technische Hochschule Aachen), energy service provider SAG, electrical hardware manufacturer RIBE and the research foundation for electrical facilities and energy economy (For-schungsgemeinschaft für elektrische Anlagen und Stromwirtschaft, FGH). The project is supported by the German Federal Institute for Materials Research and Testing as well as insulator manufacturer Lapp Insulators. Further support is provided by the Federal Ministry for Economic Affairs and Energy.
You can find images of the compactLine here.
For further information, please contact:
Volker Kamm, 50Hertz Transmission GmbH, phone 030-5150-3417,
fax 030-5150-2199, mobile phone 0172-3232-759, firstname.lastname@example.org
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