hw2_assignment

hw2_assignment - power factor of the circuit; (4 pts) 3)...

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ECE 341 Homework #2 Due: Wed. 28 Apr. ‘10 (Total: 20 points) Problem 1: For the three phase balanced system shown in the following figure, loss r ) ( t v a 1 jX 1 R 2 R 2 R 2 R loss r loss r 1 R 1 jX 1 R 1 jX ) ( t v b ) ( t v c t t v a ω cos 120 2 ) ( = , 5 . 0 = loss r ohm, and 15 2 1 1 = = = R R X ohm. where loss r is the cable resistance between the power supply and load, 1) Convert the delta connected resistive load (R 2 ) into an equivalent wye connection, then draw the single phase diagram of the circuit (3 pts) 2) Calculate the total three phase active power and reactive power, and identify the
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Unformatted text preview: power factor of the circuit; (4 pts) 3) Draw the single phase diagram of the circuit; (3 pts) 4) Calculate the efficiency of the circuit. (2 pts) Problem 2 : Given the balanced positive-sequence three-phase system in the following figure, find ) ( 1 t v and ) ( 2 t i (8 pts) Note : All the needed circuit parameters have already been identified in the circuit diagram....
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This note was uploaded on 02/21/2011 for the course ECE 341 taught by Professor Keyhani during the Spring '08 term at Ohio State.

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