03-07-2012, 03:11 PM
High Voltage Engineering
High_Voltage_Engineering.ppt (Size: 170.5 KB / Downloads: 210)
Power Transmission
Importance of power transmission.
Means to transmit and sell power.
Distant energy sources.
Trading energy.
Generation away from cities.
AC Transmission
Dominated transmission for a long time.
Needs synchronization.
Simple & cheap terminals.
Expensive towers.
Works well for short distances.
Use of models to represent lines.
AC Transmission Design
Insulation design criteria.
Withstand of standard unit = 15kv.
Adjacent centers at 0.146m.
Minimum clearance.
Sag and tension.
Tower dimensions.
DC Transmission Design
Converting Station is expensive.
Converting TRF.
Converting Valve. (quad valves).
AC & DC filtering.
DC Transmission Line.
Pole Configuration
Smaller, Cheaper DC Towers.
Line Commutation.
Conclusion
AC TL higher Tower and conductor costs and lower terminal costs.
DC TL lower Tower and conductor costs and higher terminal costs.
Economics determines the design to be used.
Line length determines which one is more economic.