Các ??a ph??ng phía Nam là khu v?c phát tri?n ch? y?u, ?em l?i ngu?n thu chính cho x? s? ki?n thi?t, v?i h?n ninety three% th? ph?n c? n??c.Harmonics are periodic distortions of voltage, current, or electrical power sine waves. Harmonics in power distribution systems are often due to non-linear hundreds for instance switched manner dc electric