Stochastic effects and uncertainties in assessing electromagnetic interactions with control systems [Elektronische Ressource] / von Velislav Varbanov

Stochastic effects and uncertainties in assessing electromagnetic interactions with control systems Dissertation zur Erlangung des akademischen Grades Doktoringenieur (Dr.-Ing.) von Dipl.-Ing. Velislav Varbanov geb. am 07.01.1972 in Burgas genehmigt durch die Fakultät für Verfahrens- und Systemtechnik der Otto-von-Guericke-Universität Magdeburg Gutachter: Prof. Dr.-Ing. habil. Ulrich Hauptmanns Prof. Dr.-Ing. Günter Wollenberg Dr.-Ing. Ralf-Michael Zander Promotionskolloquium am 09.06.2005 Abstract Nowadays the control system units operate at very low threshold energy levels. It is very important that such devices are not susceptible to emissions (either conducted or radiated) produced by other systems, or by the electromagnetic fields of natural sources, such as, lightning. The most frequent mechanism of electromagnetic interference caused by lightning on electronic components is the interaction of the discharge with the transmission line to whose end the device is connected. In order to protect the system against such events, an investigation of the voltage surges at the end of the line caused by this external field is necessary. The present work evaluates the voltage surges at the end of an underground-located low-voltage transmission line in the case of nearby lightning.