From: noone@nospam.com   
      
   Στις 3/8/2020 1:09 π.μ., ο gfretwell@aol.com έγραψε:   
   > On Sun, 2 Aug 2020 14:09:45 +0300, Dimitris Tzortzakakis   
   >  wrote:   
   >   
   >> A few weeks ago the contracts were signed for this connection, from   
   >> Crete, to Attica, 2 underwater cables, length 500 km, 500 kV, HVDC.It   
   >> goes without saying that the inhabitants of the Damasta village, don't   
   >> want the conversion station being built in their village ("not in my   
   >> backyard").Not to consider the repercussions both in economy and in   
   >> stability for Greece and Crete, 3 power stations using mainly mazut,   
   >> almost 1,000,000 tons of heavy fuel annually, not to mention the   
   >> pollution.The "small"cable, 2X180 km, 150 kV three phase, from Crete to   
   >> Peloponnissos, is going to be energized later this fall. 200 MW.The   
   >> "large" one-800 MW.The small one-the longest AC underwater link   
   >> globally, also the large one. When both of them are energized, the   
   >> savings willl be in the range of 100,000,000 euros annually for the   
   >> state utility clients all over Greece-all greeks are paying so we   
   >> Cretans don't have more expensive electricity.   
   >   
   > HVDC? That must involve some huge inverters but I guess the capacitive   
   > losses you avoid make up for it. Sounds like a very interesting   
   > project. I would think a passive conversion plant would be preferable   
   > to three bunker oil plants but I guess it depends on who's yard it is   
   > in..   
   >   
   yeah that's exactly whei I thought, Damasta is only a small village, and   
   there will be no pollution from the conversion station, while the   
   Linoperamata power station is only 15 km from Iraklion, the city I live,   
   with 180,000 inhabitants, running 6 steam units, 4 2-stroke diesels and   
   numerous gas turbines. The 1st unit is 6 MW and built in 1966 and is   
   still running! On a clear day from the mountains you can see the smog   
   from the aforesaid power station hanging over Iraklion. The other one in   
   Xylokamara, Chania is again near the city of Chania, but is running   
   mainly a combined cycle gas turbine and some open cycle gas turbines so   
   only diesel fuel. The newest one is in Atherinolakkos a desolate area   
   and is running 2 60 MW 2-stroke-diesels and 2 60 MW steam units.   
   About the cable-the other option would be AC, 400 kV, 3-phase but the   
   capacitive losses would be colossal, over 500 km. The "valve hall" is   
   going to be as large as one of our current power stations with   
   transistors big as a room and totally inaccesible when running. There is   
   going to be another valve hall near Athens and KYT Koymoyndoyroy (Center   
   of Extra High Voltage-directly from the 400 kV rails I suppose). This is   
   going to be a twin cable, with 1000 A current and as thick as 6   
   feet!With the insulation for 500 kV and shielding strong enough for the   
   bottom of the Aegean Sea, as deep as 2500 meters-almost as high as   
   Crete's highest peak, psiloritis.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)