Output filtering of the customer-end inverter in a low-voltage DC distribution network

Abstract

Passive filter topologies used at the output of the customer-end inverter in a low-voltage DC-distribution (LVDC) network are compared. The comparison of filter topologies is based on the requirements set for the voltage quality and issues such as the physical size of the filter, losses, the complexity of the needed control and the cost. It is concluded that most of the losses of LVDC system are coming from the customer-end filters. Therefore, to make the LVDC network as efficient as or even more efficient than the current three phase low voltage distribution network, filter topologies and their properties are evaluated. Because filters are used in distribution system, the cost and the losses have the governing roles. The study reveals the most suitable filter topology to be used in a LVDC distribution network, when using the specific properties presented.