As modern power systems rely more on nonlinear loads, Total Harmonic Distortion in Current (THDi) has become a critical factor in ensuring power quality and equipment longevity. In this article, we explore what THDi is, its causes, its impacts on equipment, and how to mitigate it using advanced harmonic filtering techniques. 1. What is THDi? THDi stands for Total Harmonic Current Distortion. It is...

Modern power systems are undergoing a profound transformation. What was once a grid dominated by large synchronous generators and linear loads has evolved into a complex, inverter-rich network powered by renewable energy, battery energy storage systems (BESS), EV chargers, and power electronics-based equipment.   While this transition enhances sustainability and flexibility, it also introduce...