Harmonics are periodic distortions of voltage, recent, or electric power sine waves. Harmonics in electric power distribution programs tend to be caused by non-linear hundreds for example switched mode dc ability provides and adjustable speed motor drives.B??c 1. Ng??i ch?i v?n l?a ch?n hyperlink ?? truy c?p an toàn t?o ?i?u ki?n các b??c sau th?