Distributed dynamic power flow can well solve the integrated power flow calculation problems of a power system with excessively large scale and wide area distributed data. Proceeding from the practical need and with common object request breaker architecture（CORBA） technologies， a distributed power flow calculation system based on CORBA and asynchronous iterative techniques is designed and implemented， to solve the integrated modeling problems of distributed computation with large overlapping areas on the edge of the real networks. The conflict resolution problems caused by multi-subsystem simultaneously starting calculation are solved by employing managing mechanisms such as registering， activating， starting， etc. On the makeshift test platform of the analog wide area network， the speed， robustness and effectiveness of asynchronous iteration are tested in the IEEE 118-node power system. By interfacing with the Open3000 energy management system（EMS）， further practical tests are performed in Shenzhen power grid. The test results verify the applicability and the effectiveness of asynchronous iteration of the proposed system.