Given the single line diagram of a 3-phase system below showing two networks (A & B) interconnected by a three-phase dis

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Given The Single Line Diagram Of A 3 Phase System Below Showing Two Networks A B Interconnected By A Three Phase Dis 1 (121.01 KiB) Viewed 16 times

Given the single line diagram of a 3-phase system below showing two networks (A & B) interconnected by a three-phase distribution line feeder DL. The line feeder, delivers power to a load over a particular length of the line. It has an impedance that is directly proportional to its length. Consequently, the sending end voltage drops proportionaltely over the length of the line. The voltage regulation (%VR) at the end of the line is limited to a maximum value by existing service codes. SENDING END RECEIVING END Distribution Line Feeder Vlse, Ilse → Vire, Ilre → Load - = at sending end Distribution Line at receiving end Virem = ???? (magnitude Visem = 20.0000 (magnitude ppkm = 0.1901 (resistance of receiving end line-to- of sending end line-to-ground per phase in Ohms per km) ground voltage in kV-base voltage in kV - base case 1) case 1) xpkm = 4.3149 (inductive Visea = 32.0000 (angle in reactance per phase in Virea = ???? (angle in degrees of V1sem) Ohms per km) degrees of Virem) Ilsem = 0.1000 (magnitude of Km1 = 4.0000 (distribution distribution line current in kA - line length per phase in km base case 1) - base case 1) Ilsea = 0.7500 (angle in degrees length per phase in km DL2km= (distribution line of Ilsem) under case 2) V2sem = 40.0000 (magnitude of sending end line-to-ground voltage in kV - under case 2) 12 sea = 0.1250 (magnitude of sending end line current in kA - under case 2) NOTE: If values are blank (or ???) in the table above, it means they are not given and you may (or do not have to solve for them. You may round-off the given parameters down to four decimal places if you wish. PROB #1 (base case 1): How many MVA is the 3-ph load? PROB #2 (base case 1): what is the % VR based on sending end voltage Vlsem? PROB #3 (case 2): how long (kms) can the feeder line be if the sending end voltage (LG) is increased to V2sem in order to accommodate a sending end current of 12se while maintaining the same level of %VR as determined in PROB 2?