Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Analysis of the effectiveness of non-unit protection methods within DC microgrids

Fletcher, Steven and Norman, Patrick and Galloway, Stuart and Burt, Graeme (2011) Analysis of the effectiveness of non-unit protection methods within DC microgrids. In: IET Renewable Power Generation Conference 2011. UNSPECIFIED, pp. 111-117. ISBN 978-1-84919-536-2

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The characteristic behaviour of physically compact, multi-terminal DC networks under electrical fault conditions can produce particularly demanding protection requirements. This represents a significant barrier to more widespread adoption of DC power distribution for microgrid applications. Whilst a number of methods have been proposed in the literature for such networks, which are based around the use of non-unit protection, there are limitations to the levels of fault discrimination which can be achieved. To illustrate the challenges in effectively implementing non-unit protection, this paper analytically describes the current, voltage, di/dt, dv/dt and impedance profiles of a representative network, with particular emphasis on the response for varying fault resistances. The paper highlights that the non-unit methods analysed are sub-optimal where fault location is required to be discriminated over the transient period after fault inception. Therefore, it is concluded that to achieve high levels of fault discrimination within future DC microgrid systems, more robust protection approaches are required.