Harmonics are periodic distortions of voltage, present-day, or electricity sine waves. Harmonics in ability distribution devices in many cases are attributable to non-linear loads for instance switched method dc electricity supplies and adjustable pace 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)Wit