Harmonics are periodic distortions of voltage, latest, or energy sine waves. Harmonics in electrical power distribution techniques are often due to non-linear hundreds such as switched manner dc energy supplies and adjustable pace motor drives. + Các website, ?ng d?ng quét t? ??ng d? li?u x? s? tr?c ti?p t? X? S? Minh Ng?c: K?t qu? c?p nh?t tr