Dynamic energy leakage apparatus, device and DC transmission system

The invention discloses a dynamic energy leakage apparatus, device and a DC transmission system. The dynamic energy leakage apparatus comprises: a first switch disposed between the energy leakage apparatus and a positive electrode connection end and/or a negative electrode connection end, a controllable switching module for controlling the dynamic leakage apparatus to be put into or removed from adirect current transmission line, an energy leakage module with one end connected to a first end of the controllable switching module, which is used to consume DC power, a voltage support module withone end connected to a second end of the controllable switching module and the other end connected to the other end of the leakage module, which is used to provide voltage to a inverter block on theinverter side. When the fault of the continuous commutation failure of the DC transmission system is cleared, the first switch is disconnected, in this way, the dynamic energy leakage apparatus can bequickly cut off to avoid th