Calculation of Transmission Lines and Electrical Equipment of 150kV Main Guluk- Guluk Madura Island East Java, Indonesia

Abstract

Guluk-Guluk is supplied by a 20 kV system from the Pamekasan GI and Sumenep GI, resulting in a voltage drop of 5 kV. The fall in the voltage on the load side cannot be overcome through the regulation of transformer tapping or the use of bank capacitors, so the possible way is to build a new GI. The construction of GI Guluk-Guluk requires a new transmission line. A good electric power transmission has a low voltage drop, high efficiency and high surge impedance loading (SIL) values. Efforts to improve the voltage by changing the tapping in the power transformer located at the nearest substation only produce a voltage of 166.07 kV. The provision of bank capacitors in Guluk-Guluk produces a voltage of 17,542 kV. The construction of GI Guluk-Guluk requires a new transmission line that connects Pamekasan to Guluk-Guluk, Sampang to Guluk-Guluk and Guluk-Guluk to Sumenep. The construction of a 150 kV network line requires calculations to determine network configurations, conductors, isolators, tower types, and electrical equipment supporting 150 kV transmission systems such as current transformers, voltage transformers, power breakers, and arresters. In this final project, simulation is done with the help of ETAP 12.6 software. The results of calculations and simulations of the transmission line toward Guluk-Guluk give a voltage drop of 4.89 kV, with an efficiency level of 96.74% and a SIL value of 41.225 MW. so these results are sufficient to be used as a reference for GI development in Guluk-Guluk.