|Autors: Petrakieva, S. K., Shopov, Y. M.|
Title: Electrical Device Protection from Overvoltage in a DC Power Supply Network
Keywords: electrical engineering; electronics; overvoltages; short circuit’s protection by electronic unit; transients analysis by classical method
Abstract: In the present paper a protective device based on the so-called “artificial” short circuit in the input of the network, is proposed. To ensure the necessary time for switching on the protection, the increased power supply voltage is delayed to reach the input of the protected device by additional inductance L, which is connected in series to the power supply. As a result of this forced short circuit, the DC-power supply is switched off by a standard protective circuit-breaker. The short circuit is realized by a fast-acting semi-conductor device (e.g. diac + thyristor, etc.). The controlling signal is formed as a voltage across a capacitor that is a part of RC-circuits connected in parallel to the DC power supply network. An analytical expression for this voltage, using a classical method for transient analysis, is obtained. The main aim is to determine the exact time of switching on the protection. The research is confirmed with simulations by OrCAD Pspice.
1. Milanov, K., Overvoltage Protection of Sensitive Consumers in DC-Powered Industrial Rail Grid, 11th Electrical Engineering Faculty Conference (BulEF), 2019, ISBN: 978-172812697-5, DOI: 10.1109/BulEF48056.2019.9030747 - 2019 - в издания, индексирани в Scopus или Web of Science
Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Web of Science