Chapter 12: 1CSQ (page 776)
As a result of the August 14, 2003 blackout in North America, what major electrical islands were formed?
The electrical islands that were formed are defined.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
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.
On a common base, a two-area system interconnected by a tie line has the following parameters:
The two areas are operating in parallel at the nominal frequency of . The areas are initially operating in steady state with each area supplying when a sudden load change ofoccurs in area 1. Compute the new steady-state frequency and change in tie-line power flow (a) without LFC, and (b) with LFC.
The Automatic Voltage Regulator (AVR) system of a generator is represented by the simplified block diagram shown in Figure 12.15, in which the sensor is modelled by a simple first-order transfer function. The voltage is sensed through a voltage transformer and then rectified through a bridge rectifier. Parameters of the AVR system are given as follows.
(a) Determine the open-loop transfer function of the block diagram and the closed-loop transfer function relating the generator terminal voltage to the reference voltage . (b) For the range of from to, comment on the stability of the system. (c) For , evaluate the steady-state step response and steady-state error.
For a large, , interconnected electrical system assume that following the loss of two generators (for a total generation loss of ) the change in frequency is . If all the on-line generators that are available to participate in frequency regulation have of per unit (on their own MVA base), estimate the total MVA rating of these units.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
