7. A 3 phase, Y connected generator has balanced voltages such that Va It supplies a 3-phase balanced, Y-connected load with per phase impedance of 8 + j6 Q. The impedance of line connecting the generator to the load is 0.1 + j1.0 Q per phase. Assuming a phase sequence of a,b,c, calculate: (i) Currents in all phases. (ii) Neutral current (iii) Generator and load phase and line voltage magnitudes. = 120230°.

7. A 3 phase, Y connected generator has balanced voltages such that Va It supplies a 3-phase balanced, Y-connected load with per phase impedance of 8 + j6 Q. The impedance of line connecting the generator to the load is 0.1 + j1.0 Q per phase. Assuming a phase sequence of a,b,c, calculate: (i) Currents in all phases. (ii) Neutral current (iii) Generator and load phase and line voltage magnitudes. = 120230°.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.52P: A balanced three-phase load is connected to a 4.16-kV, three-phase, fourwire, grounded-wye dedicated...

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Figure 3.32 shows the oneline diagram of a three-phase power system. By selecting a common base of 100 MVA and 22 kV on the generator side, draw an impedance diagram showing all impedances including the load impedance in per-unit. The data are given a follows: G:90MVA22kVx=0.18perunitT1:50MVA22/220kVx=0.10perunitT2:40MVA220/11kVx=0.06perunitT3:40MVA22/110kVx=0.064perunitT4:40MVA110/11kVx=0.08perunitM:66.5MVA10.45kVx=0.185perunit Lines I and 2 have series reactances of 48.4 and 65.43, respectively. At bus 4, the three-phase load absorbs 57 MVA at 10.45 kV and 0.6 power factor lagging.
A balanced three-phase load is connected to a 4.16-kV, three-phase, fourwire, grounded-wye dedicated distribution feeder. The load can be mode led by an impedance of ZL=(4.7+j9)/phase, wye-connected. The impedance of the phase conductors is (0.3+j1). Determine the following by using the phase A to neutral voltage as a reference and assume positive phase sequence: (a) Line currents for phases A, B, and C. (b) Line-to-neutral voltages for all three phases at the load. (c) Apparent. active, and reactive power dissipated per phase, and for all three phases in the load. (d) Active power losses per phase and for all three phases in the phase conductors.
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1. A balanced three phase system with a Y-connected generatorproducing 1 volt (phase to neutral) and two in parallel loads. Assume that each inductor has an impendence ZL = j10Ω and each capacitor ZC = −j15Ω. Using KVL method and one line diagram, Determine Ia (phasor), Phase voltage at the load side, that is VϕC and VϕL,the load phase current IϕC and IϕL, and total three phase complex power supplied by the y-connected voltage source ?
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