Nachdem in den vorstehenden Kapiteln die Grundlagen und die Technologien der
Hochspannungstechnik beschrieben wurden, sollen beispielhaft auch typische …

The oil-paper insulation system is widely used for the insulation purposes of power
transformers as a result of its ability to withstand high thermal and electrical stresses. The …

As a result of imperfect manufacturing process or ageing problems, a small gas cavity can
be formed between the impregnated paper layers. Partial discharge (PD) activities take …

It is state-of-the-art to describe the dielectric behavior of an insulation material by its
permittivity and its specific electric conductivity in order to estimate the dielectric stress of an …

This paper presents the non-linear and polarity-dependent electric conductivity of mineral
insulating oil and its influence on the dielectric stress of oil-insulated arrangements. At …

The increasing demand to transport electrical energy over vast distances makes the usage
of high voltage direct current (HVDC) links increasingly economic. Due to the compact …

Power transformers in converter stations of the high-voltage direct current (HVDC)
transmission have to withstand a composite AC and DC voltage stress during operation …

Die vorliegende Arbeit entstand während meiner Zeit als wissenschaftlicher Mitarbeiter an
der Professur für Hochspannungs-und Hochstromtechnik der Fakultät Elektrotechnik und …

The reliable power transmission using HVDC systems depends on the secure operation of
its high voltage equipment. So far the general understanding of the electrical field strength …

This contribution contains extensive studies about the time-dependent dielectric behavior of
mineral oil. Therefore, different measurement systems are used in order to investigate …