Summary Of The Book A power system is an electrical network responsible for supplying and transmitting power. Protection schemes have to be devised for these power systems, so that damage to life and property is reduced to a minimum in case of any dangerous, unforeseen circumstances. An electrical engineer, therefore, must be familiar with the principles of power system protection. Fundamentals Of Power System Protection is a textbook which details the fundamental concepts and design aspects involved in devising power system protection schemes. To make the text engaging and readable, the authors have included plenty of block diagrams, illustrations, tables, and figures. Extensive annotations have been provided for the graphics included in the book, as a tool for enhancing learning and absorption of concepts.
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The input phasor, designated as S,, is thepolarizing or reference input. The input phasor, designated as S,, is called the measured input.
It emphasizes the fact that, ideally, the phase comparator is sensitive only to the phase of the signals and ignores their magnitudes. If the inputs of an amplitude comparator are modified according to the theorem of duality then they become suitable as inputs for a phase comparator and vice versa. In the discussion I that follows, unless otherwise explicitly specified, we mean cosine comparator when we I mention phase comparator.
Let S, and S , be the original inputs to an amplitude comparator. Figure If such signals are fed to the dual, the output would remain unchanged.
Therefore, an amplitude comparator would restrain. In Figure Therefore, an amplitude comparator would operate trip. The geometrical construction shows, how S, and Sp are synthesized, by addition and subtraction of So and S,. Therefore, a phase-type comparator cosine-type would restrain.
The geometrical construction shows that the signals So and S, can be synthesized by addition and subtraction of S, and Sp. Therefore, a phase comparator would operate trip. It can also be easily seen that since JS, 1 3 IS, , the dual-phase comparator would also operate trlp if fed with such signals. Similarly, it can be shown that the duality holds good when the comparator is on threshold of operation. Thus, if the original inputs to an amplitude comparator cause it to remain on the threshold of operation then the modified inputs to its dual-phase comparator would also cause it to remain on the threshold of operation.
We develop here, a purely geometric method for deriving inputs suitable for the synthesis of various distance relays. These two phasors, in principle, are suitable for driving a phase comparator cosine-type. The mho relay to be synthesized has a setting of Z,ILB,. The characteristic to be synthesized is thus a circle with diameter as phasor Z,. Since the impedance phasor lies within the trip region, the relay must issue the irip output. It can be easily seen from the figure that the phasor Z, - Zrl , represented by line AE:!
For all impedances lying outside the trip region, i.
FUNDAMENTALS OF POWER SYSTEM PROTECTION BY PAITHANKAR PDF
Mami The second edition offers a new chapter on circuit breakers to further strengthen the text and meet the curriculum needs of several universities. The book, now in its second edition, continues to provide the most relevant concepts and techniques in power system protection. The students will find the material very friendly and refreshingly ;rotection. My library Help Advanced Book Search. People who bought this also bought. Electric Drives Ion Boldea. Mechatronics with Experiments Sabri Cetinkunt.
Fundamentals Of Power System Protection By Paithankar ...
One malfunction or a carelessly set relay can jeopardize the entire grid. Power system protection as a subject offers all the elements of intrigue, drama, and suspense while handling fault conditions in real life. The book reflects many years of experience of the authors in teaching this subject matter to undergraduate electrical engineering students. The book, now in its second edition, continues to provide the most relevant concepts and techniques in power system protection. The second edition offers a new chapter on circuit breakers to further strengthen the text and meet the curriculum needs of several universities.