Bidirectional direct-current energy consumption device

The invention provides a bidirectional direct-current energy consumption device. The device comprises: two DC polar lines and a plurality of bidirectional energy consumption parts, wherein the plurality of bidirectional energy consumption parts are connected between the two direct-current polar lines in a cascading manner; the bidirectional energy consumption part comprises a fully-controlled power device, a distributed energy consumption resistor, a direct-current capacitor, a plurality of protective thyristors and a voltage-sharing resistor, wherein the distributed energy consumption resistor is connected with a diode in parallel and then is connected with the fully-controlled power device in series to form a fully-controlled assembly; the full-control assembly is connected with at leastone voltage-sharing resistor and at least one direct-current capacitor in parallel to form a bidirectional energy consumption first assembly; and the at least two diodes are connected in series and then are connected in para