1. S. Frank et al., Energy Design and Scoping Tool for DC Distribution Systems (U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, 2017) https://www.energy.gov/sites/prod/files/2018/01/f47/8g_BERD_NREL.pdf
2. U.S. Department of Energy Grid Tech Team, Applications for High-Voltage Direct Current Transmission Technologies (U.S. Department of Energy, 2013). https://www.energy.gov/sites/prod/files/2015/11/f27/Applications%20of%20HVDC%20Technologies%20-%20Summary%20FINAL.pdf
3. H. Kirkham et al., An Introduction to High Voltage DC Networks (Pacific Northwest National Laboratory, 2014)
4. A. Gomez-Exposito et al., VSC-based MVDC railway electrification system. IEEE Trans. Power Deliv 29(1), 422–431 (2014)
5. X. Yao, Study on DC arc faults in ring-bus DC microgrids with constant power loads. 2016 IEEE Energy Conversion Congress and Exposition (ECCE) (2016)