Tuned Harmonic Filters
Tuned Harmonic Filters (THF) are specialized devices used to mitigate the effects of harmonic distortions in electrical distribution networks. Harmonics are unwanted, high-frequency voltages or currents in the power system that can cause damage to electrical equipment, reduce efficiency, and disturb the quality of power supply. These harmonics are typically generated by non-linear loads such as variable speed drives, rectifiers, computers, and other electronic equipment.
Tuned Harmonic Filters work by providing a low-impedance path for specific harmonic frequencies, typically the 5th, 7th, or 11th harmonics. These filters are designed to "tune" to the harmonic frequencies, effectively absorbing or attenuating them before they can affect the system. They are commonly used to prevent harmonics from reaching sensitive equipment like transformers, motors, and generators, where they can cause overheating, premature failure, and inefficiencies.