Protection scheme for an LVDC distribution system

The low voltage DC (LVDC) distribution system is a concept of new DC based distribution system. Safety of new distribution system needs to be equal or higher than traditional AC distribution systems [1]. This paper presents protection scheme for an LVDC distribution system. The analysis approaches LVDC system as a whole - from beginning of the DC district up to the customer-end protection. The analysis consist both grounded TN and ungrounded IT grounding arrangements.