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Abstract: The maximum efficiency of a transmission line is a concern from design and operation viewpoints. Today varieties of flexible AC transmission system (FACTS) devices are being included to enhance system stability and to improve power transfer capability. In this paper, the influence of different FACTS devices on maximum efficiency is studied. The equivalent A B C D constants of transmission system, which include different shunt and/or series FACTS devices at different locations of transmission line, are formulated to evaluate the maximum efficiency. Simulations on maximum transmission efficiency are performed for a 500kV system. [Copyright &y& Elsevier]

Presents an alternative approach for the protection of power transmission lines using a minimal radial basis function neural network (MRBFNN). Use of a sequential learning procedure to determine the optimum number of neurons in the hidden layer without resorting to trial and error; Adjustment of network parameters using a variant of extended Kalman filter.

Presents an apparent impedance calculation procedure for distance relaying of transmission line involving Flexible AC Transmission Systems devices, particularly the unified power flow controller (UPFC). Impact of the presence of the UPFC on the trip boundaries; Other factors influencing the trip boundary; Ideal trip characteristics.