Download Electric Power Systems. A Conceptual Introduction by Alexandra von Meier PDF
By Alexandra von Meier
A transparent rationalization of the know-how for generating and supplying electricity
Electric energy platforms explains and illustrates how the electrical grid works in a transparent, undemanding variety that makes hugely technical fabric obtainable. It starts with a radical dialogue of the underlying actual ideas of electrical energy, circuits, and intricate energy that serves as a origin for extra complex fabric. Readers are then brought to the most parts of electrical energy structures, together with turbines, automobiles and different home equipment, and transmission and distribution apparatus corresponding to energy traces, transformers, and circuit breakers. the writer explains how an entire strength process is controlled and coordinated, analyzed mathematically, and stored sturdy and reliable.
Recognizing the industrial and environmental implications of electrical power creation and public problem over disruptions of provider, this ebook exposes the demanding situations of manufacturing and offering electrical energy to assist tell public coverage judgements. Its discussions of advanced innovations akin to reactive strength stability, load circulate, and balance research, for instance, provide deep perception into the complexity of electrical grid operation and show how and why physics constrains economics and politics.
Although this survival consultant contains mathematical equations and formulation, it discusses their which means in undeniable English and doesn't suppose any earlier familiarity with specific notations or technical jargon. extra beneficial properties include:
* A thesaurus of symbols, devices, abbreviations, and acronyms
* Illustrations that support readers visualize methods and higher comprehend advanced concepts
* certain research of a case examine, together with an internet connection with the case, permitting readers to check the results of manipulating quite a few parameters
With its transparent dialogue of ways electrical grids paintings, electrical energy structures is acceptable for a large readership of execs, undergraduate and graduate scholars, govt supplier managers, environmental advocates, and shoppers.
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Additional info for Electric Power Systems. A Conceptual Introduction
We know that our body is experiencing a force downward because of the gravitational attraction between it and the Earth. This gravitational force depends on the respective masses of our bodies and the Earth, but it also depends on our location: astronauts traveling into space feel less and less of a pull toward the Earth as they get farther away. Indeed, though the effect is small, we are even slightly “lighter” on a tall mountain or in an airplane at high altitude. 5 ELECTRIC AND MAGNETIC FIELDS 19 could construct a map of a “gravitational ﬁeld” encompassing the entire atmosphere, which would indicate the strength of gravity at any point.
4 THE PHYSICS OF ELECTRICITY Electromagnetic Induction While electric current creates a magnetic ﬁeld, the reverse effect also exists: magnetic ﬁelds, in turn, can inﬂuence electric charges and cause electric currents to ﬂow. However, there is an important twist: the magnetic ﬁeld must be changing in order to have any effect. A static magnetic ﬁeld, such as a bar magnet, will not cause any motion of nearby charge. Yet if there is any relative motion between the charge and the magnetic ﬁeld—for example, because either the magnet or the wire is being moved, or because the strength of the magnet itself is changing— then a force will be exerted on the charge, causing it to move.
The other extreme case is simply an open circuit, where the two terminals are separate and the resistance of the air between them is inﬁnite: here the current and the power consumption are obviously zero. Example Consider two incandescent light bulbs, with resistances of 240 V and 480 V. How much power do they each draw when connected to a 120 V outlet? 5 A. 25 A. 5 A)2 . 25 A)2 . 480 V ¼ 30 W. We see that at constant voltage, the bulb with twice the resistance draws half the power. There are other situations, however, where the current rather than the voltage is constant.