A Lower Saxon engineer has developed a concept to lay HVDC lines cheaper and more environmentally friendly in the soil. The electricity network operators from blocking.
A Lower Saxon engineer has developed a self-described concept for underground cables, which should be cheaper than conventional technology, and also less engaged in the landscape. The Technology Review reported in its latest issue.
Underground as an alternative to power lines?
Image: Tennet <- RSPEAK_START -> Ingo Rennert, the! among other network connections for offshore wind farms plans, proposes to lay the cables in trenches with so-called liquid soil. A trench of fifty centimeters wide so rich from completely to accommodate two cables with a combined capacity of one gigawatt. In addition, one could use sleeveless pieces of cable of up to three kilometers, which would reduce the number of joints to a third.
In the dispute over the extension of power lines underground cables apply to the persons affected as gentler alternative. The currently applied underground cable routes for three-phase lines is anything but invisible. Electricity network operator Amprion example is where a road width of 22 meters for his project in Raesfeld. In addition, the network operator must establish every 800 meters garage large buildings, enabling access to the so-called joints of the individual cable sections.
“For the foreseeable future not yet implemented”
Amprion shares Rennert optimism therefore do not. The concept is to a large extent “technically not feasible in the foreseeable future,” said a company spokesman. In addition, the network operators criticized the cost calculation. “Here, assumptions are made that do not appear to understand,” says the spokesman Amprion. So it is unrealistic to mention cost of laying the cable, without knowing the exact course of the route.
two scientists from the University of Hannover express in a given of Tennet report commissioned doubts about the concept So the researchers questioned whether a cable module length of three kilometers, given the logistics involved -. well repairs -. really useful addition, they point out that the plug that will connect the modules together, “not yet, or not used to the extent necessary for a new technique” have been. <- AUTHOR DATA MARKER BEGIN -> ( Ralph Diermann ) / <-! RSPEAK_STOP -> (wst)
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