The change in water flow required at the BFP pump at the Barru Power Plant is only regulated by a valve located on the pressure side, causing excess power consumption and its own power consumption. One effort to save energy usage is to make frequency adjustments that refer to the right pressure and water flow. To determine the effect of frequency adjustments on the expected pump pressure, a simulation of
frequency inverter modeling is performed using the SPWM switching method based on the pump affinity law using Matlab application software. The simulation results obtained that by adjusting the frequency range of the inverter from 45.5 Hz to 50 Hz and keeping the pump pressure above the minimum limit of 13.2 MPa, the operating power savings of the BFP motor are obtained from 46 kW to 378 kW.