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List of Questions: What is Power Transmission? What is Corona in Transmission Lines?  What is ACSR? What is Sag? What is an Insulator? What are some factors on which sag depends? Why do overhead transmission lines posses capacitance? Why bundled conductors are employed in transmission lines? Why transmission line conductors are stranded? What is skin effect?  1. What is Power Transmission? The carriage of electric power from Generation Station to Distribution Stations is known as Power transmission. Electric power is generated at the power stations (Nuclear plants, Hydro power plants, Coal power plants etc.). It is then transmitted over large distances to distribution stations with the help of conductors known as transmission lines 2. What is Corona in Transmission Lines?  When an alternating voltage is applied across two conductors having larger spacing as compared to their diameters, there is no change in surrounding air. However, when the applied voltage exceeds certai...

  Power Transmission and Distribution:   The structure of a power system can be divided into generation (G), transmission, (T), and distribution (D) facilities, as shown in Figure (A). An ac three-phase generating system provides the electric energy. this energy is transported over a transmission network, designed to carry power at high or extrahigh voltages over long distances from generators to bulk power substations and major load points. the subtransmission network is a medium to high-voltage network whose purpose is to transport power over shorter distances from bulk power substations to distribution substations.  The transmission and subtransmission systems are meshed networks with multiplepath structure so that more than one path exists from one point to another to increase the reliability of the transmission system.  The transmission system, in general, consists of overhead transmission lines (on transmission towers), transformers to step up or step down volt...