Partial Discharge and Breakdown of Solid Dielectrics under AC, DC, and Combined AD/DC High Voltage Stresses

Autor: Hassan Saadati

ISBN: 978-3-95900-465-7

Dissertation, Leibniz Universität Hannover, 2020

Herausgeber der Reihe:

Umfang: 155 Seiten, 125 Abbildungen

Schlagworte: Power Transmission System, Silicone Rubber, Epoxy Resin

Kurzfassung: The penetration of energy systems with renewable energy, mostly from wind turbines which are often far from the load centres, is increasing. Furthermore, shutting down of nuclear power plants in Germany, increasing the use of photovoltaic systems, and new consumer-structures, such as electric vehicles, require a redesign in the power transmission system. As an option, integration of direct current (DC) transmission systems in the existing alternating current (AC) infrastructure is proposed. The research on dielectrics under AC voltage has taken excellent progress, but analysis on DC condition is not as well developed as that under AC. In the case of the combined AC/DC voltage, the performance of insulation systems is not well  known. Therefore, more research concerning the behaviour of insulation materials in combined AC/DC systems is necessary. Development of suitable models for the prediction of component behaviour in AC/DC systems, including the derivation of reliability statements is a fundamental part in this research.