After a short introduction of the history of the high and extra high voltage cables, the mechanical construction of various types of cables are shown and their advantages and disadvantages are discussed. Furthermore, the basics of thermal dimensioning of cables are introduced. Then the different diagnostic parameters such as PD and breakdown measurements are shown. The presentation ends with the presentation of new activities for the production of HVDC cables.
Prof. Borsi has studied electrical engineering at the University of Hannover and received his PhD in high voltage engineering in 1976 and his venia legendi in 1979 from the University of Hannover, Germany. In 1979 he started at Ferdowsi University of Mashhad, Iran at School of engineering, where he worked up to 1986 as professor for energy technique and dean of the School of engineering. He founded the transformer factory “Reza Transwerk” in Mashhad. Beside his work at the university he was appointed as scientific adviser of the ministry of energy in Iran.
Since 1987 he is working as professor and academic director at the University of Hannover in the field of high voltage engineering. He was a member of VDE, worked in different CIGRE Task Forces and national Working Groups for standardization. He is author and co-author of more than 350 scientific publications in different languages and co-author of three scientific books. He has more than 30 patent registrations in the field of high voltage technology and is the scientific organizer and scientific chairman of different annual conferences such as TLM (Transformer Life Management), which started 11 years ago and “Epoxy and Polyurethane Resins in Electrical and Electronic Engineering”, which he chaired since over 30 years.
He has been working as an expert on different transformer, generator, bushings and cable problems all over the world. Moreover, he worked as an expert for failure cause analyses at large power transformers in different countries such as USA, Malaysia, Columbia, and different European countries and failure cause analysis of numerous special transformers for windmills around the world.