Direct current conversion device and system

Abstract

A direct current conversion device and system, relating to the technical field of high voltage direct current transmission. The direct current conversion device comprises a normally-on solid-state circuit breaker, a control panel and a plurality of power modules; a direct current is input into the direct current conversion device by means of the normally-on solid-state circuit breaker; the input ends of the power modules are connected in series, and the output ends of the power modules are connected in parallel; each power module is used for carrying out power conversion on the input direct current and supplying power to the control panel; and the control panel is used for receiving voltage signals and/or current signals fed back by the power modules and controlling the power modules, controlling the normally-on solid-state circuit breaker and performing signal interaction with control panels in other direct current conversion devices to enable the direct current conversion devices to be uniform in current. The direct current conversion device can realize black start, has low costs, and is stable and reliable.

Dependencies are inferred from the claim text.