This book presents a new transmission line protection scheme using voltage transient waveforms and fundamental voltage and current signals. The scheme integrates the high frequency transient protection algorithms with the synchronized sampling fault location algorithms to produce high speed fault detection and accurate location to the fault. The algorithms were enhanced by a new fault classification technique based on wavelet singular entropy and neural networks to classify different fault types and detect arcing activity within the faultIn order to reach better reliability and stability to...

Metallic pipelines are used to transmit the natural gas and petrolum products. Usually pipelines are constucted in the same pathway of the High Voltage Transmission Lines to save the right-way cost. AC voltage is induced on these pipelines due to the electric and magnetic fields of the overhead transmission lines. This book gives the calculations of electric and magnetic fields around the H.V.T.L and studies the hazards appear due to electromagnetic field on the workers, the damage of the pipelines coating and corrosion of the metallic pipelines construction.