Harmonics are periodic distortions of voltage, present, or power sine waves. Harmonics in energy distribution methods are often because of non-linear masses which include switched mode dc energy materials and adjustable speed motor drives.HLV Didier Tholot c?a Pau FC lên ti?ng ??ng viên ti?n v? Nguy?n Quang H?i tr??c th?m tr?n g?p Sochaux ? vòng