Harmonics are periodic distortions of voltage, present-day, or energy sine waves. Harmonics in ability distribution methods are sometimes due to non-linear hundreds including switched mode dc power provides and adjustable speed motor drives.Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh)Theo Ch? t?ch Barca Joan Lap