2. Draw an impedance diagram for the system whose one-line diagram is shown in Figure P5.15. The 30 and line-line ratings are as follows: Generator: 30 MVA, 13.8 kV, Xs = 0.10 p.u. Motor: 20 MVA, 13.8kV, Xs=0.08 p.u. T₁: 20 MVA, 13. 2-132kV, X, = 0.10 p.u. T₂: 15 MVA, 13. 8-138kV, X, = 0.12 p. u. Line: 20+ 1000 (acutal) Pick the generator ratings for the base in the generator section. Generator T₁ AY 1₂. 000- 0024 YA Motor

2. Draw an impedance diagram for the system whose one-line diagram is shown in Figure P5.15. The 30 and line-line ratings are as follows: Generator: 30 MVA, 13.8 kV, Xs = 0.10 p.u. Motor: 20 MVA, 13.8kV, Xs=0.08 p.u. T₁: 20 MVA, 13. 2-132kV, X, = 0.10 p.u. T₂: 15 MVA, 13. 8-138kV, X, = 0.12 p. u. Line: 20+ 1000 (acutal) Pick the generator ratings for the base in the generator section. Generator T₁ AY 1₂. 000- 0024 YA Motor

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.61P

See similar textbooks

Similar questions

A synchronous generator has been synchronized to an infinite grid of 13.8 kV and 60 Hz. The generator prime mover C/C is such that the no-load frequency is 62.5 Hz and the power slope is 1 MW/Hz. The AVR C/C (The reactive power against the terminal voltage C/C) is such that the zero reactive power voltage is 14.6 kV, while the slope is 0.4 MVAR/kV. Calculate: (a) the kVA loading of the generator and its power factor. (b) the settings of the prime mover and AVR such that the generator delivers 3 MW at 0.85 lagging power factor.
5.7. In Figure P5.7, the voltages at a, b, and c are balanced 30. Transformers are ideal and have the same turns ratio. Find the voltages Va, Vic, and Vea in terms of Vab, Vher and V ca (a) Are they balanced 30? (b) If not, how would you reconnect the transformers to obtain balanced 36? a rele b 6 b' 000 ( Figure P5.7
Discuss the concept of reactive power and its role in grid stability.
Q5/B: Explain delta-star connection of 3 ph transformers. What its advantages and disadvantages?
A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.
If, in one (360 degrees), all of the instantaneous power falls under positive loops (no negativeloops), the load must be:a. A resistorb. An inductor or capacitorExplain:
The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load under sinusoidal-steady-state excitation. is (a) Nonzero constant (b) Zero (c) Containing double-frequency components
write all possible KCL and KVL equations. simplify all and in ascending order, with contsant at the right side of the equation.
A 120V adjustable frequency ac source is connected in series with a resistor, an inductor, and a capacitor. At 60Hz, the resistance is 5 ohms, the inductive reactance is 3 ohms, and the capacitive reactance is 4 ohms. Compute: (a)load impedance at 60Hz (b) value of the capacitance and inductance Explain each step.
3 X 0.1 1 2 XL = 0.2 to Eato oto O X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. (2 Marks) b) Find the bus voltages and line currents during the fault. (2 Marks)
The total reactive power consumed by the three-phase load(in VAr) is??
Subject - Design electrical circuits for single phase AC networks Question - Compare the effect of varying resistance, capacitance and inductance in a pararllel and series AC circuits on voltage resistance and impedance.