Vetrino-Isaccea-Juschnoukrajinsk high-voltage line
The Vetrino-Isaccea-Juschnoukrajinsk high-voltage line was one of the few 750 kV lines in what is now the EU. In 2010 it is only in operation between Wetrino-Isaccea with 400 kV, the section to Ukraine to Juschnoukrajinsk has been dismantled. The operating section is powered by three-phase alternating current.
history
The construction of the 750 kV line from the Ukrainian nuclear power plant South Ukraine in Juschnoukrajinsk via Romania to Bulgaria was decided in Moscow in 1982. The first partial commissioning took place in 1986 and the complete commissioning in 1988.
course
The line begins at the Wetrino substation in Bulgaria and runs north. At Dobruja , it crosses the border with Romania and Bulgaria and ends at the Isaccea substation , which is close to the border with Ukraine. The second line section that was dismantled today begins in the Isaccea substation. After just a few masts, it crosses the Danube, which forms the border between Ukraine and Romania, on 118 meter high delta masts in a 938 meter long span. The line then runs north and crosses the border with Moldova twelve times, and although it passes directly by the Vulcăneşti substation , there was no connection to the Moldovan electricity grid.
description
The masts of the line are designed to accommodate a circuit in one level. Bundles of four act as conductors. Almost all support masts are portal masts. Two types are used here, namely free-standing portal masts and cable-braced portal masts. In the former, the central insulator is V-shaped. Mast triples are used as guy masts . In the case of guy masts without a sharp change in direction, a fourth mast is required to fix the current loop . To twist are instead of the usual one Verdrillmastes five masts needed.
Current status
The section between Wetrino and Isaccea has been operated at 400 kV since the Romanian power grid was synchronized with the Western European power grid. The section between Isaccea and Yuzhnoukrajinsk has been out of service since the synchronization. Today there is only a short section of this line section from the Isaccea substation to immediately after the Danube crossing and a short section in the area of the Juschnoukrajinsk nuclear power plant . In southern Ukraine and Moldova there are still numerous masts without conductors, although the number of missing masts tends to increase sharply in the north. Today it is no longer possible to determine the complete course of the line on satellite images.