Conceptual Design of EHV and UHV Transmission Line

Abstract

Power system comprises of three main parts namely: Generation, Transmission and Distribution. Generating voltage adopted worldwide are 11 kV and 13.8 kV. Transmission voltage is again classified in ve dierent forms such as LV (Low voltage), MV (Medium Voltage), HV (High Voltage), EHV (Extra High Voltage) and UHV (Ultra High Voltage).

In the earlier days, transmission of power was carried out at HV and EHV level as power demand was less. Due to industrialization and rapid growth in population, demand of power consumption has also been increased. Moreover, transmitting the power requires a dedicated power corridor and Right of Way (R.O.W). Right of Way (R.O.W) is the biggest concern for the utility and the private players of power industry due to reluctance from the local people to give away their piece of cultivated land for erection of lattice towers for transmitting the power. Thus the utility and private players has shifted from the conventional way of transmitting power to different new concepts and modern trends such as Uprating, Upgrading, use of higher system voltages (EHV and UHV) for transferring large blocks of power using same R.O.W, use of Multi Circuit towers in replacement of Single Circuit towers.

The report provides detailed design of 400 kV transmission line Quard Conguration double Circuit and comparative study of different 400 kV double circuit tower configuration. Comparative study involve power ow, electromagnetic and electrostatic effect, corona loss and Radio and audio noise. This also includes 765 kV tower electrostatic and environment effect.