Picture of athlete cycling

Open Access research with a real impact on health...

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 Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Analysis of voltage source converter-based high-voltage direct current under DC line-to-earth fault

Rafferty, John and Xu, Lie and Morrow, John (2015) Analysis of voltage source converter-based high-voltage direct current under DC line-to-earth fault. IET Power Electronics, 8 (3). 428–438. ISSN 1755-4535

PDF (Rafferty-etal-IETPE-2015-Analysis-of-voltage-source-converter-based-high-voltage-direct-current)
Rafferty_etal_IETPE_2015_Analysis_of_voltage_source_converter_based_high_voltage_direct_current.pdf - Accepted Author Manuscript

Download (1MB) | Preview


DC line faults on high-voltage direct current (HVDC) systems utilising voltage source converters (VSCs) are a major issue for multi-terminal HVDC systems in which complete isolation of the faulted system is not a viable option. Of these faults, single line-to-earth faults are the most common fault scenario. To better understand the system under such faults, this study analyses the behaviour of HVDC systems based on both conventional two-level converter and multilevel modular converter technology, experiencing a permanent line-to-earth fault. Operation of the proposed system under two different earthing configurations of converter side AC transformer earthed with converter unearthed, and both converter and AC transformer unearthed, was analysed and simulated, with particular attention paid to the converter operation. It was observed that the development of potential earth loops within the system as a result of DC line-to-earth faults leads to substantial overcurrent and results in oscillations depending on the earthing configuration.