Analysis of The Kalasan Feeders Quality performance when New Big Customers are Connected to PT PLN (Persero) ULP Pangkalan Balai Electrical System

Abstract

In 2022, it’s planned that big customers will be connected to PLN ULP Pangkalan Balai electric system, and this condition can increase revenue. But another condition is the feeder to supply new customers have bad performance. The feeder to supply new customers is the Kalasan feeder. Kalasan feeder has a voltage drop of more than 15%.  To analyze how to repair the kalasan feeder was used with ETAP. ETAP is software for electrical power system load flow analysis that is used to simulate the actual condition. Based on the existing condition of the electrical system on the kalasan feeder, do simulations with ETAP. This simulation is carried out with various scenarios, including repairing with AVR, repairing with capacitors, repairing by uprating conductors, repairing by uprating distribution transformers, simulation with express feeder, simulation to the construction of a new substation, and connected solar power system to 20 kV grid. Based on the simulations of several scenarios, the best alternative is to connect the solar power system to a 20 kV grid. The result is a voltage drop decrease below 5%, a power factor of more than 95%, losses are smaller than before, and revenue increases.