By Farouk A. M. Rizk, Giao N. Trinh
Encouraged by means of a brand new revival of globally curiosity in extra-high-voltage (EHV) and ultra-high-voltage (UHV) transmission, excessive Voltage Engineering merges the newest learn with the huge adventure of the simplest within the box to carry a accomplished therapy of electric insulation structures for the following iteration of application engineers and electrical strength pros. The e-book deals vast insurance of the actual foundation of high-voltage engineering, from insulation pressure and power to lightning attachment and safety and beyond.
Presenting info severe to the layout, choice, checking out, upkeep, and operation of a myriad of high-voltage strength apparatus, this must-have text:
Discusses energy approach overvoltages, electrical box calculation, and statistical research of ionization and breakdown phenomena crucial for correct making plans and interpretation of high-voltage exams Considers the breakdown of gases (SF6), drinks (insulating oil), solids, and composite fabrics, in addition to the breakdown features of lengthy air gaps Describes insulation platforms at present utilized in high-voltage engineering, together with air insulation and insulators in overhead energy transmission traces, gas-insulated substation (GIS) and cables, oil-paper insulation in energy transformers, paper-oil insulation in high-voltage cables, and polymer insulation in cables Examines modern practices in insulation coordination in organization with the overseas Electrotechnical fee (IEC) definition and the newest criteria Explores high-voltage checking out and measuring innovations, from new release of attempt voltages to electronic measuring methods
With an emphasis on dealing with useful events encountered within the operation of high-voltage strength gear, excessive Voltage Engineering offers readers with a close, real-world knowing of electric insulation platforms, together with a few of the components affecting and the particular technique of comparing insulation functionality and their software within the institution of technical requirements. "
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We will start with an introductory section dealing with transients in simple lumped circuits. Although power systems are far more complex, such simple circuits help understanding some of the basic mechanisms of overvoltage generation. These circuits are also used in laboratory simulation of fault interruption. Another section deals with the traveling wave solution of the wave equation of a lossless transmission line and associated lattice diagram. Once again, although real lines obviously have losses, 1 2 High Voltage Engineering it is often possible to represent such losses by lumped resistors in the middle and terminals of a loss-free line, which facilitates computation considerably.
A brief review of the fundamental laws contributing to the establishment of the well-known Maxwell equations is given in the succeeding text, together with the general system of differential equations defining the potential and vector functions, which completely describe the electromagnetic field. The focus will be given to the case of electrostatic field, generally described by the Laplace or Poisson equation and the different methods of solution and, hence, defining the electric field in practical configurations of a discharge gap.
1 Cartesian Coordinates In the Cartesian coordinates, x, y, z, equipotential surfaces corresponding to x = const, y = const, and z = const are plane surfaces perpendicular to the x-, y-, and z-axis, respectively. 14) The preceding equation can be satisfied only if 1 d2Z = p2 Z ( z) dz 2 1 d 2Y = q2 Y ( y ) dy 2 1 d2 X + p2 = -q 2 X ( x ) dx 2 where p2 and q2 are positive constants and are effectively separated into three differential equations of single variable. The general solution for y and z is of the exponential type; that for x is sinusoidal.
High Voltage Engineering by Farouk A. M. Rizk, Giao N. Trinh