Special HVDC circuit

The utility model relates to a special HVDC circuit, four converter transformer fall into two sets of being connected to respectively in two change of current valve circuit, two change of current valve circuit one end interconnect, one end is connected to 800KV output 1 and 800KV output 2 through smoothing reactor F1 and smoothing reactor F2 respectively in addition, still be connected with DC filter DC1 between smoothing reactor F1 and the smoothing reactor F2, including two sets of change of current valves in the change of current valve circuit, four arresters and the bypass switch, arresterA7 and arrester A15 have still been add, arrester A14, the utility model discloses every exchanges electrode double converter, and four group's change of current valves are to 800KV direct current output design to capacious, compact structure, transmit more high -efficient, and be provided with the bypass switch in every change of current valve circuit, but every change of current valve circuit independent operation, nim