Pulse Sequence Analysis and Pulse Shape Analysis : Methods to Analyze Partial Discharge Processes Vom Fachbereich Elektrotechnik und Informatik der Universität Siegen zur Erlangung des akademischen Grades Doktor der Ingenieurwissenschaften (Dr.-Ing.) genehmigte Dissertation von Dipl.-Phys. Djamal Benzerouk 1. Gutachter: Prof. Dr. rer. nat. Rainer Patsch 2. Gutachter: Prof. Dr.-Ing. Dirk Peier Tag der mündlichen Prüfung: 6. Juni 2008 Dedication i A la mémoire de mon père et ma grand mère ii Acknowledgement Acknowledgement This thesis was written on results from work carried out during my time as research assistant (2002-2008) at the Institute of Materials & Diagnostics in Electrical Engineering (WED), Uni-versity of Siegen, Germany. First of all, I would like to express my deepest gratitude to my supervisor, Prof. Dr. rer. nat. Rainer Patsch for his encouragements, support and never ending enthusiasm. I thank him for his tolerance and his guidance. I would like to gratefully acknowledge Prof. Dr.-Ing. Dirk Peier for accepting to be the exam-iner of my thesis, for his interest in this work and for his comments concerning the manuscript. Thanks to Prof. Mario Pacas for his interest in this work and for his readiness to chair the Ex-amination Committee.