Chapter 12: 3CSQ (page 776)
What lessons were learned from this blackout?
Short Answer
The lessons learned from the restoration are discussed.
Chapter 12: 3CSQ (page 776)
What lessons were learned from this blackout?
The lessons learned from the restoration are discussed.
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Get started for freeThe block-diagram representation of a closed-loop automatic regulating system, in which generator voltage control is accomplished by controlling the exciter voltage, is shown in Figure 12.14. and are the time constants associated with the amplifier, exciter, and generator field circuit, respectively. (a) Find the open-loop transfer function . (b) Evaluate the minimum open-loop gain such that the steady-state error does not exceed . (c) Discuss the nature of the dynamic response of the system to a step change in the reference input voltage.
Rework Problems 12.15 through 12.16 when the load in area 2 suddenly decreases by . The load in area 1 does not change.
Repeat Problem 12.7 if the frequency decreases by per unit. Determine the MW increase of each unit.
Each unit in Problem 12.5 is initially operating at one-half its own rating when the load suddenly increases by . Determine (a) the steady state decrease in area frequency, and (b) the MW increase in mechanical power output of each turbine. Assume that the reference power setting of each turbine-generator remains constant. Neglect losses and the dependence of load on frequency.
Repeat Problem 12.14 if LFC is employed in area 2 alone. The area 2 frequency bias coefficient is set at . Assume that LFC in area 1 is inoperative due to a computer failure.
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