ansB4 - Module B4 Problem 1 Consider the power system shown...

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Unformatted text preview: Module B4 Problem 1 Consider the power system shown below. Choose a system power base 100MVA and a line-to-line voltage base for section 1 as 6.9kV. The load in section 3 consumes 10MVA at 0.8pf leading when the line-to-line voltage at the load is 13.8kV (a) Determine the ohmic value of a R+jX load (R and X connected in series, as shown) in section 3 that consumes this same amount of power at the specified voltage level (i.e., that consumes 10 MVA at 0.8 pf leading at 13.8kV line-to-line). (b) Compute the impedance base for the section 3 load. Solution to problem 1 (a) ( 29 ( 29 - = + = = = 426 . 11 235 . 15 6 . 8 . 10 10 10 8 . 13 6 2 3 2 2 j j S V Z Z V S LL LL (b) 015 . 70 8 . 6 9 . 6 9 . 6 2 = = BASE V ( 29 = = = = = 8519 . 1 10 608 . 13 608 . 13 71 8 . 13 015 . 70 2 3 2 3 3 BASE BASE BASE BASE BASE S S V Z V Problem 2 Consider the power system shown below. Choose a system power base of 100MVA and a line-to-line voltage base for section 1 as 6.9kV. Determine the appropriate values of per unit impedance for transformers T1, T2, ad the transmission line....
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This note was uploaded on 04/06/2008 for the course EE 303 taught by Professor Mccalley during the Spring '08 term at Iowa State.

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ansB4 - Module B4 Problem 1 Consider the power system shown...

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