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Power System Analysis and Design

Mulukutla S Sarma, J D Glover, Thomas Overbye

Computer Science

6th Edition · 925 pages

ISBN: 9781305632134

Chapter 8: Q45P (page 536)

For Problem 8.14, calculate the real and reactive power delivered to the three-phase load.

Short Answer

Expert verified

Step by step solution

Write the given data from the question.

Determine the formulas to calculate real and reactive power delivered to the load.

Calculate real and reactive power delivered to the load.

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Most popular questions from this chapter

In a balanced three-phase system, what is the zero-sequence voltage? $V_{0} =$ _______________

A three-phase impedance load consists of a balanced- $Δ$ load in parallel with a balanced-Y load. The impedance of each leg of the $Δ$ load is $Z_{Δ} = 6 + j 6,$ , and the impedance of each leg of the Y load is $Z_{Y} = 2 + j 2,$ . The Y load is grounded through a neutral impedance. $Z_{n} = j 1 Ω$ Unbalanced line-to-ground source voltages, $V_{a g}, V_{b g}$ and $V_{c g},$ with sequence components $V_{0} = 10 ∠ 60 °, V_{1} = 100 ∠ 0 °$ and $V_{2} = 15 ∠ 200 °$ volts are applied to the load. (a) Draw the zero-, positive-, and negative-sequence networks. (b) Determine the complex power delivered to each sequence network. (c) Determine the total complex power delivered to the three-phase load.

For Problem 8.25, determine the complex power delivered to the load in terms of symmetrical components. Verify the answer by adding up the complex power of each of the three phases.

The sequence impedance matrix $Z_{s}$ for a balanced-Y load is a diagonal matrix and the sequence networks are uncoupled.

(a) True

(b) False

Given the line-to-ground voltage $V_{a g} = 280 ∠ 0^{°}, V_{b g} = 250 ∠ - 110^{°}$ , and $V_{c g} = 290 ∠ 130^{°}$ , calculate (a) the sequence components of the line to-ground voltages, denoted $V_{L g 0}$ , $V_{L g 1}$ and $V_{L g 2}$ ; (b) line-to-line voltages $V_{L L 0}, V_{L L 1}$ , and $V_{L L 2}$ ; and (c) sequence components of the line-to-line voltages $V_{L L 0} = 0, V_{L L 1},$ and $V_{L L 2}$ . Also, verifies the following general relation: $V_{L L 0} = 0, V_{L L 1} = \sqrt{3} V_{L g 1},$ and $V_{L L} = \sqrt{3} V_{L g 2} ∠ - 30^{°} v o l t s$ .

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For Problem 8.14, calculate the real and reactive power delivered to the three-phase load.

Short Answer

Step by step solution

Write the given data from the question.

Determine the formulas to calculate real and reactive power delivered to the load.

Calculate real and reactive power delivered to the load.

One App. One Place for Learning.

Most popular questions from this chapter

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