How Active Harmonic Filters Reduce THDi and Improve Industrial Power Quality
Modern industrial facilities rely heavily on variable frequency drives (VFDs), UPS systems, rectifiers, welding machines, automation equipment, and other power electronic loads. While these technologies improve productivity and efficiency, they can also introduce harmonic distortion into the electrical network. One of the key indicators of this distortion is Total Harmonic Distortion of Current. High THDi can lead to transformer heating, cable losses, voltage distortion, equipment malfunction, reduced system efficiency, and premature aging of electrical assets. Active Harmonic Filters provide a dynamic solution by detecting harmonic currents and generating compensating currents to reduce distortion in real time. This makes them an effective technology for improving power quality in modern industrial electrical systems. What Is THDi? THDi, or Total Harmonic Distortion of Current, indicates the amount of harmonic current present in an electrical system compared with the fundamental ...