Harmonic resonance detection and prevention in the aluminum company of Egypt at Nag-hammady

For the aluminum company at Nag-hammady, resonances are detected for all expected operational conditions. Harmonic filters are designed, and suggested to be installed, and resonances due to expected switchings of those filters are found. Finally methods of harmonic resonance prevention technique in that company network are applied and their effectiveness are proved. It is shown that the application of such techniques will assure continual service for that important company, together with saving of equipments and rectifiers damaged yearly by those harmonic resonances.