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Fault analysis of an active LVDC distribution network for utility applications

WANG, Dong and Emhemed, Abdullah and Burt, Graeme and Norman, Patrick (2016) Fault analysis of an active LVDC distribution network for utility applications. In: 51st International Universities' Power Engineering Conference, 2016-09-06 - 2016-09-09, Coinmbra Institute of Engineering.

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Abstract

Low Voltage DC (LVDC) distribution systems are new promising technologies which can potentially improve the efficiency and controllability of existing LV distribution networks. However, they do introduce new challenges under different fault conditions. This paper investigates the performances of an active LVDC distribution network with local solar photovoltaics (PVs) and energy storages under different short-circuit faulted conditions. A typical UK LV distribution network energized by DC is used as a test network, and modeled using PSCAD/EMTDC. The LVDC is interfaced to the main AC grid using fully controlled two-level voltage source converter (VSC), and supplies DC and AC loads through DC/DC converter and DC/AC converter respectively. The response of an LVDC with such converters combination with different topologies and fault management capabilities are investigated through the simulation analysis.