@article {azad2016fast,
	title = {A fast local bus current-based primary relaying algorithm for HVDC grids},
	journal = {IEEE Transactions on Power Delivery},
	volume = {32},
	year = {2016},
	pages = {193{\textendash}202},
	publisher = {IEEE},
	author = {Azad, Sahar Pirooz and Van Hertem, Dirk}
}