A power generation system (10, 10'), comprising: at least one generator that generates a medium voltage direct current that has a positive pole DC voltage output and a negative pole DC voltage output; and characterized in that: each said at least one generator comprises a multi-phase generator associated with a pair of AC/DC rectifiers (32A, 32B), each said AC/DC rectifiers having a positive DC output (50A, 50B) and a negative DC output (52A, 52B), wherein said negative output from a first AC/DC rectifier is connected to said positive output from a second AC/DC rectifier, said positive output from the first AC/DC rectifier being connected to said positive pole DC voltage output and said negative output from the second AC/DC rectifier being connected to said negative pole DC voltage output; a medium voltage DC (MVDC) cable system comprising: a positive pole cable connected to each said positive pole DC voltage output; a negative pole cable connected to each said negative pole DC voltage output; a positive bus bar connected to all said positive pole cables and a negative bus bar connected to all said negative pole cables, a substation (74, 110) connected to said MVDC cable system, said substation (74, 110) comprising multiple DC/DC step-up converters (78, 114a-114x), said substation (74, 110) providing a plurality of feeder cables, each of which includes a positive feed cable connected to the positive bus bar and a negative feed cable connected to the negative bus bar, said plurality of feeder cables connected to a like number of step-up DC/DC converters (78, 114a-114x), to step-up said medium voltage direct current to a high voltage direct current. at least one generator that generates a medium voltage direct current that has a positive pole DC voltage output and a negative pole DC voltage output; and characterized in that: each said at least one generator comprises a multi-phase generator associated with a pair of AC/DC rectifiers (32A, 32B), each said AC/DC rectifiers having a positive DC output (50A, 50B) and a negative DC output (52A, 52B), wherein said negative output from a first AC/DC rectifier is connected to said positive output from a second AC/DC rectifier, said positive output from the first AC/DC rectifier being connected to said positive pole DC voltage output and said negative output from the second AC/DC rectifier being connected to said negative pole DC voltage output; a medium voltage DC (MVDC) cable system comprising: a positive pole cable connected to each said positive pole DC voltage output; a negative pole cable connected to each said negative pole DC voltage output; a positive bus bar connected to all said positive pole cables and a negative bus bar connected to all said negative pole cables, a substation (74, 110) connected to said MVDC cable system, said substation (74, 110) comprising multiple DC/DC step-up converters (78, 114a-114x), said substation (74, 110) providing a plurality of feeder cables, each of which includes a positive feed cable connected to the positive bus bar and a negative feed cable connected to the negative bus bar, said plurality of feeder cables connected to a like number of step-up DC/DC converters (78, 114a-114x), to step-up said medium voltage direct current to a high voltage direct current. each said at least one generator comprises a multi-phase generator associated with a pair of AC/DC rectifiers (32A, 32B), each said AC/DC rectifiers having a positive DC output (50A, 50B) and a negative DC output (52A, 52B), wherein said negative output from a first AC/DC rectifier is connected to said positive output from a second AC/DC rectifier, said positive output from the first AC/DC rectifier being connected to said positive pole DC voltage output and said negative output from the second AC/DC rectifier being connected to said negative pole DC voltage output; a medium voltage DC (MVDC) cable system comprising: a positive pole cable connected to each said positive pole DC voltage output; a negative pole cable connected to each said negative pole DC voltage output; a positive bus bar connected to all said positive pole cables and a negative bus bar connected to all said negative pole cables, a substation (74, 110) connected to said MVDC cable system, said substation (74, 110) comprising multiple DC/DC step-up converters (78, 114a-114x), said substation (74, 110) providing a plurality of feeder cables, each of which includes a positive feed cable connected to the positive bus bar and a negative feed cable connected to the negative bus bar, said plurality of feeder cables connected to a like number of step-up DC/DC converters (78, 114a-114x), to step-up said medium voltage direct current to a high voltage direct current. a positive pole cable connected to each said positive pole DC voltage output; a negative pole cable connected to each said negative pole DC voltage output; a positive bus bar connected to all said positive pole cables and a negative bus bar connected to all said negative pole cables, a substation (74, 110) connected to said MVDC cable system, said substation (74, 110) comprising multiple DC/DC step-up converters (78, 114a-114x), said substation (74, 110) providing a plurality of feeder cables, each of which includes a positive feed cable connected to the positive bus bar and a negative feed cable connected to the negative bus bar, said plurality of feeder cables connected to a like number of step-up DC/DC converters (78, 114a-114x), to step-up said medium voltage direct current to a high voltage direct current.