Harmonics are periodic distortions of voltage, recent, or energy sine waves. Harmonics in electric power distribution programs are often attributable to non-linear masses such as switched manner dc electric power provides and adjustable velocity motor drives.Báo Tu?i Tr? phát tri?n Tu?i Tr? Sao nh?m t?ng b??c nâng cao ch?t l??ng n?i dung, t?ng k