High voltage direct current transmission and distribution system

摘要

A direct current to alternating current inverter sub-system is for a HVDC distribution system. The DC to AC inverter sub-system includes an enclosure and a DC to DC galvanically isolated buck converter having a DC input electrically connectable to a HVDC cable and a DC output. A DC to AC inverter includes a DC input electrically connected to the DC output of the DC to DC galvanically isolated buck converter and an AC output electrically connectable to an AC transmission line. The DC to AC inverter is mounted in an enclosure with the DC to DC galvanically isolated buck converter, in order that the DC output of the DC to DC galvanically isolated buck converter is directly electrically connected within the enclosure to the DC input of the DC to AC inverter.

主权项

1. A high voltage direct current transmission and distribution system comprising:
an alternating current to direct current converter including an alternating current input and a direct current output; a first high voltage direct current cable including a first end electrically connected to the direct current output of said alternating current to direct current converter and an opposite second end; and a distribution system comprising: a number of high voltage direct current circuit breakers, each of said number of high voltage direct current circuit breakers including a first portion electrically connected to the opposite second end of said first high voltage direct current cable and a second portion; a number of second high voltage direct current cables, each of said number of second high voltage direct current cables including a first end electrically connected to the second portion of a corresponding one of said number of high voltage direct current circuit breakers and an opposite second end; a number of galvanically isolated direct current to direct current converters, each of said number of galvanically isolated direct current to direct current converters including a direct current input electrically connected to the opposite second end of a corresponding one of said number of second high voltage direct current cables and a direct current output; a number of direct current to alternating current voltage source inverters, each of said number of direct current to alternating current voltage source inverters including a direct current input electrically connected to the direct current output of a corresponding one of said number of galvanically isolated direct current to direct current converters and an alternating current output; a number of alternating current transmission lines, each of said number of alternating current transmission lines including a first end electrically connected to the alternating current output of a corresponding one of said number of direct current to alternating current voltage source inverters and an opposite second end; and a number of alternating current loads, each of said number of alternating current loads electrically connected to the opposite second end of a corresponding one of said number of alternating current transmission lines, wherein each of said number of direct current to alternating current voltage source inverters is mounted in an enclosure with a corresponding one of said number of galvanically isolated direct current to direct current converters, in order that the direct current output of the last said corresponding one of said number of galvanically isolated direct current to direct current converters is directly electrically connected within the enclosure to the direct current input of a corresponding one of said number of direct current to alternating current voltage source inverters.