Novel topology of combined AC-DC distribution network interconnected with renewable energy

With the rapid development of smart grid, the combined AC-DC distribution technology is attracting more and more attention. This paper presents a novel topology of combined AC-DC distribution network to solve the problem of the interconnection of the renewable energy and power distribution network. The combined AC-DC distribution network in this paper not only presents a novel mode of coupling and decoupling of renewable energy by using zig-zag transformer but also shows advantages in steady and transient state compared with traditional ac distribution mode. We simulated the novel topology by PSCAD. The simulation results prove the feasibility of the novel topology.