Perbandingan Rugi Daya, Rugi Tegangan, dan KHA pada Saluran Bawah Laut Jawa – Madura antara Kabel Inti Tunggal Isolasi XLPE dengan Kabel Minyak (Paper Insulation in Oil-Filled Cable) 3 Inti 150 kV

Abstract

Transmission of electric power from power plants to the load center or customer hold very important part. It is necessary to calculate power loss, voltage drop, and current-carrying capacity. Power loss refer to the heat generated in cable conducting parts (phase conductors, sheath, and armour) and in cable insulating part. Heating power in phase conductors, sheath, and armour mainly depend on current values. When dealing with underground power cable or submarine power cable, sheath circulating currents can be induced. These currents produce power loss in the sheath and decrease the ampacity (current-carrying capacity) of the cables. This paper discussed the calculation and comparison of power loss, voltage drop, and current-carrying capacity in three phase single-core XLPE insulated cables and 3-cores oil filled cable of 150 kV rated voltage. Both of them had a same cross section of conductor (300 mm2), with copper conductor. Two laying conditions (trefoil and flat formation) are considered for three phase single-core cables, sheaths are bonded solidly at both ends. The smallest power loss occur in the conductors of the trefoil formation and the value is 107635,4536 watt at full load (300 A). The biggest power loss occur in the 3-cores oil filled cable with value 170608,7556 watt at full load (300 A). The percentage voltage drop reaches maximum of 0,13995 % in the 3-cores oil filled cable and the minimum of 0,07389 % in the leading phase of flat with separation formation without transposition. The leading phase cable of the flat-touching formation has a biggest current-carrying capacity and the value is 591,2766531 A . The 3-cores oil filled cable has a smallest current-carrying capacity with value 415,4620701 A. Keywords : transmission, power loss, voltage drop, high voltage cable, insulation, current-carrying capacity