Hsan HADJ ABDALLAH is currently associate professor the Department of Electrical Engineering of National school of Engineering of Sfax-Tunisia at University of Sfax and member in the “ACEM” laboratory ENIS Sfax.He received his Maitrise in electrical engineering from the superior normal school of technical teaching of Tunis-Tunisia in 1982,The „diplomes d‟études approfondues „in electrical engineering from the superior normal school of technical teaching of Tunis-Tunisia in 1984,The „doctorat‟ in electrical engineering from the superior normal school of technical teaching of Tunis-Tunisia in 1991 and habilitation universities in electrical engineering from National school of Engineering of Sfax in 2007. His main research interests are electrical power system (EPS), the dispatching and the stability of the EPS, wind energy and intelligent techniques applications in the EPS. He is author and co-author of about 30 papers in international journals and national and international conferences