Sababaha ugu muhiimsan ee cilada waa shimbiraha oo soo booda, wareegga gaaban ee alaabta buulka shimbiraha iyo wareegga gaaban ee jirka shimbiraha.Waxaa ka mid ah, safarka khadka ee ay sababaan in ay ku saxaroodaan taawarka shimbiraha waaweyn ee biyaha sida ardeidae iyo xooluhu ay 90% ka yihiin cilada xadhkaha gudbinta ee waxyeelada shimbiraha, waana sababta ugu weyn ee safarka shimbiraha khadka gudbinta.Sheyga buulka shimbiraha wareegga gaaban, wareegga gaaban ee shimbiraha ee uu keeno albaabka wareegga inta badan ayaa ka dhacay wareegga qaybinta.Sidaa darteed, diiradda khadka gudbintacaarada shimbirahawaa in laga hortago waxyeelada shimbiraha ay sababaan shimbiraha waaweyn.caarada shimbirahawaa irbad bir ah oo lagu rakibay taawarka si ay uga hortagto in shimbiraha waaweyni ay ku dhaqaaqaan taawarka si ay meesha uga saarto shimbiraha soo dhacaya.Qaniinyada shimbiraha ayaa inta badan lagu dabaqaa si looga hortago in shimbiraha qaranka ay soo boodaan xariiqda min 110 kv ilaa 500 kv.