The invention belongs to the technical field of medium-
voltage power distribution network flexible
interconnection, and aims to solve the problem that in the prior art, a medium-
voltage flexible
interconnection system which is large in capacity and stable in operation and has different
voltage grades is lacked. The invention provides a cross-voltage-level asymmetric flexible
interconnection alternating-current and direct-current
hybrid power distribution network, which realizes asymmetric flexible interconnection of a power distribution network line at a lower voltage side and a power distribution network line at a higher voltage side by adopting a method of
hybrid use of a power electronic device and a traditional
transformer. Due to the adoption of the technical scheme, aiming at the requirement of asymmetric flexible interconnection of a 6kV line and a 10kV line, the cost and the benefit of the flexible interconnection device are well considered through organic fusion and cooperative cooperation of the two topological structures, higher reliability and better economical efficiency are achieved, the output capacity is greatly improved on the premise of ensuring stable operation, and the service life of the flexible interconnection device is prolonged. And the development requirements of the AC-DC
hybrid power distribution network are met.