Design and Implementation of Capacitor Installation by Considering Capacity and Location of Capacitor Optimization in 20 kV Distribution Network

Power losses are common problems that cause the electricity distribution will not to be optimally delivered. This research aimed to minimize power losses in the 20 kV distribution network by installing capacitors with a case study on the Majenang 06 (MJG06) feeder. It is necessary to do an accurate calculation to get the most optimal capacitor installation results. Calculations are carried out by using the power factor correction diagram method to find the reactive power demand. The reactive power demand at the load center was calculated by the average of its three phases of 600 kVAR. However, a new challenge occurs when the available capacitors in the warehouse are only sized at 300 kVAR per phase. So, two capacitors are required to fulfill the reactive power injection. Furthermore, load flow analysis method is used to search for the optimal combination locations of two capacitors installation is conducted by considering the largest decrease in power losses. This research has been implemented on 20 kV distribution network, and the result shows that the capacitors could raise the average power factor to 0.98 followed by a reduced value of power losses. It proves that this proposed method can improve power quality in the 20 kV distribution network.