1 load characteristics. 2 supply system. 3 conductors. 4 power cables. 5 line insulators and supports. 6 sag and tension. 7 line parameters. 8 per unit representation. 9 short and medium lines. 10 long transmission lines. 11 general network constants. 12 power circle diagrams. 13 control of voltage and reactive power. 14 load flow analysis. 15 economic operation of power systems. 16 symmetrical faults. 17 symmetrical components. 18 unsymmetrical faults. 19 power system stability. 20 travelling waves. 21 overvoltage protection. 22 corona. 23 high voltage direct current(HVDC) transmission. 24 system neutral grounding. 25 tariffs. 26 power factor improvement. 27 voltage stability. 28 flexible AC. transmission systems(FACTS).