Electrical Transients in Power Systems by Greenwood PDF

By Greenwood

ISBN-10: 0471620580

ISBN-13: 9780471620587

Basic notions approximately electric transients. The laplace remodel approach to fixing differential equations. easy switching transients. Damping. irregular switching transients. Transients in three-phase circuits. Transients in direct present circuits, conversion apparatus and static var controls. Electromagnetic phenomena of significance below brief stipulations. touring waves and different transients on transmission traces. rules of temporary modeling of energy platforms and parts. Modeling energy gear and the habit of such apparatus less than temporary stipulations. desktop aids to the calculation of electric transients. process and part parameter values to be used in brief calculations and capacity to procure them in size. Lightning. Insulation coordination. safeguard of platforms and gear opposed to temporary overvoltages. Case stories in electric transients. apparatus for measuring transients. Measuring ideas and surge trying out. Appendices. Index.

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Extra resources for Electrical Transients in Power Systems

Example text

5 proximated by these methods using the average length of the sides of the double channel arrangement for the · . , a = --2-' see Fig. 27. Reactance should be corrected for channel thickness. The 60 cps reactance of standard channel sections arranged in box form and separated by standard spacers and spacer supports is expressed by the curves in Fig. 27. These curves give the inductive reactance for standard channels with depths of 3 inches to 10 inches for conductor spacings up to 100 inches. For spacings over 100 inches, the reactance for a 12 inch spacing should be taken from the curves and a spacing factor from the table on page 137 added to this reactance to obtain the total inductive reactance per conductor.

27. These curves give the inductive reactance for standard channels with depths of 3 inches to 10 inches for conductor spacings up to 100 inches. For spacings over 100 inches, the reactance for a 12 inch spacing should be taken from the curves and a spacing factor from the table on page 137 added to this reactance to obtain the total inductive reactance per conductor. The reactance of double channel conductors arranged in box form can be determined by a more rigorous mathematical formula developed by Siegel and Higgins.

Equations for Determioing Current Distribution Among the Conductors of Buses Comprised of Double Channel Conductors," C. M. Siegel and T, J. Higgins, AIEE Traosactions Paper 54-467, October, 1954. electrical design - section II REACTANCE CURVES AT 60 CPS FOR DOUBLE·CHANNEL CONDUCTORS ARRANGED IN BOX FORM 9(1 II J V V ~~ I I I V ~~ I I ~w-1 80 '-,T ,-J ----... I- 0 0 .... ft. 73#~ Lbs. -::::~V ....... 48#::=:':::::% j V ~ / VVVV V V / 7 /: ~V; V / / ~~/ VVA I i 1/ A A II / V ....... %' 3 V - .

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Electrical Transients in Power Systems by Greenwood


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