Since 2013, TSC member 50Hertz, one of the four German transmission system operators (TSOs), is committed to the research and development project “compactLine”. The pylons of this innovative overhead line concept only reach a height of 30-36m. Furthermore, the narrow corridor width of only 55-60m reduces the impact on nature and local residents significantly in comparison to conventional overhead lines, thus helping to promote the public acceptance of the grid extension.
A representative population survey conducted last year on behalf of 50Hertz, showed a high degree of consent for the new design. Now “compactLine” has taken another important step: The competent local authority has approved the plans of 50Hertz to built a pilot model line at the substation Jessen/Nord in the German federal state of Saxony-Anhalt. The pilot line with a length of about 2km will comprise five pylons.
The commissioning of the test “compactLine” is scheduled for summer 2018. In a monitoring phase lasting at least one year, the entire system as well as its individual components are then being checked regularly by the German TSO. Dr. Frank Golletz, Chief Technical Officer at 50Hertz, emphasises the significance of the new line concept as “further technology option in addition to classic overhead lines and cables” which can be considered in future planning and approval procedures.
> See 50Hertz press release, in German (html)
Illustration based on a picture by 50Hertz