VASSESSMENT PROBLEMSObjective 1-Understand ac power concepts, their relationships to one another, and how to calcuate them in a circuit(A to B),Q = -866.03 VAR (B to A);10.1 For each of the following sets of voltage andcurrent, calculate the real and reactive powerin the line between networks A and B in thecircuit shown. In each case, state whether thepower flow is from A to B or vice versa. Alsostate whether magnetizing vars are being trans-ferred from A to B or vice versa.Answer: (a) P = 500 W(b) P = -866.03 WQ = 500 VAR(B to A),(A to B);(c) P = 500 WQ = 866.03 VAR (A to B);(A to B),a) v = 100 cos (wt – 45°) V;i = 20 cos (wt + 15°) A.(d) P = -500 WQ = -866.03 VAR (B to A).(B to A),- 45') V;b) v = 100 cos (wti = 20 cos (wt + 165') A.10.2 Compute the power factor and the reactive fac-c) v = 100 cos (wt -i = 20 cos (wt –45") V;105') A.tor for the network inside the box in Fig. 10.6,whose voltage and current are described inExample 10.1.d) v = 100 cos wt V;i = 20 cos (wt + 120°) A.Hint: Use -i to calculate the power and reac-tive factors.AВAnswer: pf = 0.5 leading; rf = -0.866.%3DNOTE: Also try Chapter Problem 10.1.

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0.1 For each of the following sets of voltage and current, calculate the real and reactive power in the line between networks A and B in the circuit shown. In each case, state whether the power flow is from A to B or vice versa. Also state whether magnetizing vars are being trans- ferred from A to B or vice versa. a) v = 100 cos (wt - 45') V; i = 20 cos (wt + 15°) A. b) v = 100 cos (ot - 45) V; i = 20 cos (ot + 165') A. c) v = 100 cos (wt – 45°) V; i = 20 cos (ot – 105') A. d) v = 100 cos wt V; i = 20 cos (wt + 120°) A. A B WOTE: Also try Chapter Problem 10.1.

0.1 For each of the following sets of voltage and current, calculate the real and reactive power in the line between networks A and B in the circuit shown. In each case, state whether the power flow is from A to B or vice versa. Also state whether magnetizing vars are being trans- ferred from A to B or vice versa. a) v = 100 cos (wt - 45') V; i = 20 cos (wt + 15°) A. b) v = 100 cos (ot - 45) V; i = 20 cos (ot + 165') A. c) v = 100 cos (wt – 45°) V; i = 20 cos (ot – 105') A. d) v = 100 cos wt V; i = 20 cos (wt + 120°) A. A B WOTE: Also try Chapter Problem 10.1.

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 2.18P: Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of...

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