If the voltage and current given below are suppliedby a source to a circuit or load, determinea. The power supplied by the source which isdissipated as heat or work in the circuit (load).b. The power stored in reactive components in thecircuit (load).c. The power factor angle and the power factor.˜VS = 7∠0.873 V ˜IS = 13∠(−0.349) A

If the voltage and current given below are suppliedby a source to a circuit or load, determinea. The power supplied by the source which isdissipated as heat or work in the circuit (load).b. The power stored in reactive components in thecircuit (load).c. The power factor angle and the power factor.˜VS = 7∠0.873 V ˜IS = 13∠(−0.349) A

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 2.11P

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Under balanced operating conditions, consider the three-phase complex power delivered by the three-phase source to the three-phase load. Match the following expressions, those on the left to those on the right. (i) Realpower, P3 (a) (3VLLIL)VA (ii) Reactive power, Q3 (b) (3VLLILsin)var (iii) Total apparent power, S3 (c) (3VLLILcos)W (iv) Complex power, S3 (d) P3+jQ3 Note that VLL is the rms line-to-line voltage, IL is the rms line current, and is the power-factor angle.
The voltage v(t)=359.3cos(t)volts is applied to a load consisting of a 10 resistor in parallel with a capacitive reactance XC=25. Calculate (a) the instantaneous power absorbed by the resistor, (b) the instantaneous power absorbed by the capacitor. (c) the real power absorbed by the resistor, (d) the reactive power delivered by the capacitor, and (e) the load power factor.
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Consider a load impedance of Z=jwL connected to a voltage and V let the current drawn be I. (a) Develop an expression for the reactive power Q in terms of ,L, and I, from complex power considerations. (b) Let the instantaneous current be i(t)=2Icos(t+). Obtain an expression for the instantaneous power p(t) into L, and then express it in terms of Q. (c) Comment on the average real power P supplied to the inductor and the instantaneous power supplied.
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ESSAY What are the effects of basic electrical components on the average power of the system and what is the concept of power factor.