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New Age Extra High Voltage A.C. Transmission Engineering 5th Edition

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New Age Extra High Voltage A.C. Transmission Engineering 5th Edition
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Quick Overview
Modern power transmission is utilizing voltages between 345 kV and 1150 kV, A.C. Distances of transmission and bulk powers handled have increased to such an extent that extra high voltages and ultra high voltages (EHV and UHV) are necessary.
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  • Modern power transmission is utilizing voltages between 345 kV and 1150 kV, A.C. Distances of transmission and bulk powers handled have increased to such an extent that extra high voltages and ultra high voltages (EHV and UHV) are necessary. The problems encountered with such high voltage transmission lines exposed to nature are electrostatic fields near the lines, audible noise, radio interference, corona losses, carrier and TV interference, high voltage gradients, heavy bundled conductors, control of voltages at power frequency using shunt reactors of the switched type which inject harmonics into the system, switched capacitors, overvoltages caused by lightning and switching operations, long air gaps with weak insulating properties for switching surges, ground-return effects, and many more. The important topic of EHV cable transmission up to 1200 kV is gaining ground with oil-filled, PPLP, XLPE, and SF, insulation.

 

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