Abstract: Some embodiments provide a DC power distribution system that includes a plurality of DC sources coupled to a plurality of DC buses via respective protection devices that are configured to selectively cause an open-circuit between the DC source and the respective DC bus in the event of a fault or overload condition on the respective DC bus. The plurality of DC buses are coupled to a load combiner, and the system is configured to supply power in parallel from the DC sources via the plurality of DC buses to at least one DC/DC step-down converter via the load combiner, which combines the power supplied via the plurality of DC buses. The DC buses, load combiner, and the DC power sources are configured such that the total maximum load current is capable of being supplied via less than all of the plurality of DC buses in the event that any one of the DC buses is non-operational.

Abstract: Some embodiments provide a DC solid state protection device that includes a capacitor configured such that in the event of a short-circuit condition, the capacitor provides all the short-circuit current required for the solid state protection device to detect a current indicative of a short-circuit condition and to cause a solid state switch to be opened, thereby tripping the solid state protection device.

Abstract: A method for droop control in a DC system comprising a DC source, a DC bus and at least two DC application devices. Each application device having a droop curve and the DC source providing a DC voltage over the DC bus to each application device. Each application device performs a first voltage measurement during a first load condition and performs a second voltage measurement during a second load condition. Each application device adjusts its respective settings of the droop curve in accordance with the first and second voltage measurements.

Abstract: A protection circuit for connecting and disconnecting to a DC power source, and a DC operated device including such a protection circuit. The protection circuit has input terminals for receiving power from a DC power source and output terminals for providing power to a DC operated device; a first stage with a voltage measurement circuit coupled between the input terminals; and a second stage following the first stage including a pre-charge control circuit. The protection circuit further includes a digital controller arranged for controlling activating and de-activating a local PSU for supplying power to electronics of the DC operated device. The digital controller is arranged for measuring a voltage of the voltage measurement circuit and de-activating the local PSU when detecting a voltage drop on the first input terminal that exceeds a predetermined threshold dip and/or threshold slope.

Abstract: Some embodiments provide a DC power distribution system that includes a plurality of DC sources coupled to a plurality of DC buses via respective protection devices that are configured to selectively cause an open-circuit between the DC source and the respective DC bus in the event of a fault or overload condition on the respective DC bus. The plurality of DC buses are coupled to a load combiner, and the system is configured to supply power in parallel from the DC sources via the plurality of DC buses to at least one DC/DC step-down converter via the load combiner, which combines the power supplied via the plurality of DC buses. The DC buses, load combiner, and the DC power sources are configured such that the total maximum load current is capable of being supplied via less than all of the plurality of DC buses in the event that any one of the DC buses is non-operational.