Chapter 6: Q2CSQ (page 404)
Do high penetrations of wind and solar generation increase the wear and tear costs of fossil-fueled generation? Why?
Answer
The reason for high penetration of the wind energy and the solar energy.
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
Prime-mover control of a generator is responsible for a
significant change in ___________, whereas excitation control
significantly changes __________.
(a) Consider complex power transmission via the three-phase short line for which the per-phase circuit is shown in Figure 5.19. Express , the complex power sent by bus (or), and (), the complex power received by bus (or), in terms of and, which is the power angle.
(b) For a balanced three-phase transmission line in per-unit notation with,determine and () for
(i)
(ii) and
Comment on the changes of real and reactive powers from parts (i) to (ii).
The fuel-cost curves for a two-generator power system are given as follows:
While the system losses can be approximated as
If the system is operating with a marginal cost () of, determine the output of each unit, the total transmission losses, the total load demand, and the total operating cost.
For the Newton-Raphson method, the region of attraction (or basin of attraction) for a particular solution is the set of all initial guesses that converge to that solution. Usually initial guesses close to a particular solution will converge to that solution. However, for all but the simplest of multi-dimensional, nonlinear problems, the region of attraction boundary is often fractal. This makes it impossible to quantify the region of attraction and hence to guarantee convergence. Problem 6.25 has two solutions when x2 is restricted to being betweenand. With theinitial guess fixed atradians, numerically determine the values of theinitial guesses that converge to the Problem 6.25 solution. Restrict your search to values of betweenand.
Solve forandin the system of equations given by
using the Gauss method with an initial guess of and.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
