Harnessing APFC for Optimal Efficiency: A deep Dive into Technical and Economic Benefits for Utility Substations

This paper presents a case study on the design, simulation, and implementation of an Automatic Power Factor Correction (APFC) system at the 400kV Waluj substation, installed to address low power factor penalties and improve overall energy efficiency.The APFC system, controlled by a microcontroller, dynamically adjusts capacitor banks to maintain an optimal power factor and mitigate harmonics.A MATLAB simulation was developed to model the system's behavior, illustrating its effectiveness in reactive power compensation, though lacking the full automation present in the installed system.Usually implementing such strategy where low power factor penalty is more, could save significant amount leading to generation of revenue.The economic analysis indicates a favorable Return on Investment (ROI) and positive Net Present Value (NPV), making the APFC system a cost-effective solution for reducing tariff penalties and enhancing system performance.