Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.


Electro-thermal analysis of power converter components in low-voltage DC microgrids for optimal protection system design

Sztykiel, Michal and Fletcher, Steven and Norman, Patrick and Galloway, Stuart and Burt, Graeme (2017) Electro-thermal analysis of power converter components in low-voltage DC microgrids for optimal protection system design. IEEE Transactions on Smart Grid. ISSN 1949-3053

Text (Sztykiel-etal-IEEE-TSG-2017-Electro-thermal-analysis-of-power converter-components)
Sztykiel_etal_IEEE_TSG_2017_Electro_thermal_analysis_of_power_converter_components.pdf - Accepted Author Manuscript

Download (4MB) | Preview


Bidirectional power converters are considered to be key elements in interfacing the low voltage dc microgrid with an ac grid. However to date there has been no clear procedure to determine the maximum permissible fault isolation periods of the power converter components against the dc faults. To tackle this problem, this paper presents an electro-thermal analysis of the main elements of a converter: ac inductors, dc capacitors and semiconductors. In doing this, the paper provides a methodology for quantifying fault protection requirements for power converter components in future dc microgrids. The analysis is performed through simulations during normal and fault conditions of a low voltage dc microgrid. The paper develops dynamic electro-thermal models of components based on the design and detailed specification from manufacturer datasheets. The simulations show the impact of different protection system operating speeds on the required converter rating for the studied conditions. This is then translated into actual cost of converter equipment. In this manner, the results can be used to determine the required fault protection operating requirements, coordinated with cost penalties for uprating the converter components.