Izgube električnega dela pri prenosu

Hm nekaj sem ti našel na wikipediji glede tega

Transmitting electricity at high voltage reduces the fraction of energy lost to Joule heating. For a given amount of power, a higher voltage reduces the current and thus the resistive losses in the conductor. For example, raising the voltage by a factor of 10 reduces the current by a corresponding factor of 10 and therefore the I^2R\,\! losses by a factor of 100, provided the same sized conductors are used in both cases. Even if the conductor size is reduced x10 to match the lower current the I^2R\,\! losses are still reduced x10. Long distance transmission is typically done with overhead lines at voltages of 115 to 1,200 kV. At extremely high voltages, more than 2,000 kV between conductor and ground, corona discharge losses are so large that they can offset the lower resistance loss in the line conductors.

Transmission and distribution losses in the USA were estimated at 7.2% in 1995 [2], and in the UK at 7.4% in 1998. [3]

As of 1980, the longest cost-effective distance for electricity was 4,000 miles (7,000 km), although all present transmission lines are considerably shorter.

Electric power transmission @ Wikipedia

Torej okoli 7% :D ?

Zanimivo je tudi furanje DC napetosti po daljnovodih ki se celo splača (AC-DC-AC ali pa DC-AC) :)

Eh kompliciraš z _oceno_ izgub. Če te kot dijaka vprašajo za oceno nečesa pa res ne moreš narobe odgovorit, sploh pri enih vajah ki jih bo profesor prelistal pogledal nahitro če zadeve štimajo in od oka prbil eno oceno. Lahko napišeš 10% pa bo dobro.

Nizkonapetostni kabli in prostozračni vodi povezujejo TP s priključnimi mesti odjemalcev, kjer so vgrajeni števci. Razlika med med proizvedeno oz uvoženo elektriko in seštevkom s števci registriranega odjema, so izgube prenosa in transformacije, ki v SLO znašajo okrog 7 %. Izgube segrevajo vodnike in transformatorje ter predstavljajo odpadno toploto.

Instalacijski vodniki povezujejo električni razdelilnik oz števec z vtičnicami in drugimi trošili. Tudi v hišnih instalacijah nastajajo izgube v vodnikih med števcem in trošili, ki znašajo 1,0-1,5 %, s števcem registriranega odjema elektrike.

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