An aircraft power system includes a front-end power converter and a back-end power converter. The front-end power converter is configured to generate a first direct current (DC) supply voltage or a second DC supply voltage based on a voltage level of an alternating current (AC) supply voltage output from an AC voltage source. The backend power converter sub-system is configured to convert the first DC supply voltage or the second DC supply voltage into a backend supply voltage. An active power distribution system is configured to select different electrical paths between the front-end converter and the backend converter subsystem in response to detecting output of the first DC supply voltage and the second DC supply voltage.