High voltage direct current power system, power conversion device and high voltage direct current feeding method

摘要

Problem to be solved: to suppress the increase in the capacity and the installation area by reducing the capacity of the power converter which efficiently supplies regenerative power by the regenerative brake to the electric vehicle in the far way, and converts the regenerative power into voltage. Problem to be solved: to provide a high voltage direct current power system capable of installing a facility for power transmission by regenerative power.High voltage DC power system of the present inventionDC electric wire that supplies DC power to electric car by DC electric currentA high voltage direct current electric wire with a high DC voltage higher than the DC voltage of a DC wire arranged in parallelIt is inserted between the DC wire and the high voltage DC wire.Equipped with a power conversion device that interconnects power between DC and high voltage DC cablesElectric power conversion deviceIn response to changes in DC voltage of DC cablesThe adjustment voltage corresponding to the negative current flowing through the power conversion device is subtracted or added from the DC voltageUsing the corrected DC voltage corrected by the DC voltageThe DC high voltage of high voltage DC wire is controlled.Diagram