POWER SYSTEM TRANSMISSION
Q: Why 3 phase power is used and not 6 phase or 12 phase? There are two reasons: (1) using three phases results in the lowest conductor cost/watt to transmit power; (2) using three phases displaced in space around a cylinder by 120 degrees results in a rotating magnetic field when the three phases are excited by three voltage sources displaced in time by 120 electrical degrees - this is a fundamental energy conversion principle for the operation of AC motors and generators. Q:What is transmission line? Transmission line is the long conductor with special design (bundled) to carry bulk amount of generated power at very high voltage from one station to another as per variation of the voltage level. Q:What are the types of transmission line? Short Transmission Line Medium Transmission Line long Transmission Line Q: What is short transmission line? Length is about 50 km. Voltage level is up to 20 kV Capacitance effect is negligible Only resistance and inductance are taken in calculation. Q...