Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and have the following characteristics: Area 1: R1 = 0.015 pu and D1 = 0.8 pu on a base of 1500 MVA Area 2: R2 = 0.03 pu and D2 = 0.9 pu on a base of 500 MVA The power flow direction on the tie line is from Area 1 to Area 2. Using a common base of 1500 MVA, what is the per-unit steady-state frequency change (Aw) for a load increase of 150 MW in Area 1? Select one: O a. 1.4822 x 10-³ pu O b.-0.8763 x 10-² pu O c. None of these O d. - 1.2677 x 10-³ pu

Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and have the following characteristics: Area 1: R1 = 0.015 pu and D1 = 0.8 pu on a base of 1500 MVA Area 2: R2 = 0.03 pu and D2 = 0.9 pu on a base of 500 MVA The power flow direction on the tie line is from Area 1 to Area 2. Using a common base of 1500 MVA, what is the per-unit steady-state frequency change (Aw) for a load increase of 150 MW in Area 1? Select one: O a. 1.4822 x 10-³ pu O b.-0.8763 x 10-² pu O c. None of these O d. - 1.2677 x 10-³ pu

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 8RQ

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Question

Two power system areas operating at a nominal frequency of 60 Hz are connected with a
tie line, and have the following characteristics:
Area 1: R1 = 0.015 pu and D1 = 0.8 pu on a base of 1500 MVA
Area 2: R2 = 0.03 pu and D2 = 0.9 pu on a base of 500 MVA
The power flow direction on the tie line is from Area 1 to Area 2.
Using a common base of 1500 MVA, what is the per-unit steady-state frequency change
(Aw) for a load increase of 150 MW in Area 1?
Select one:
O a. 1.4822 x 10-³ pu
O b. - 0.8763 x 10-² pu
O c. None of these
O d. - 1.2677 x 10-³ pu

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