The fact that multiple isomer information systems （called for short the isomer information system） coexist in power supply enterprises makes the dynamic data replication from one information system to another necessary. As a result

the dynamic data replication is the issue to be dealt with first for a new isomer information system to be constructed for power supply enterprises. Several schemes for dynamic data replication are designed base on Oracle database and the Delphi object-oriented database in this paper. Different scheme has different advantages and disadvantages

and is applicable for different occasion. It is suggested that the scheme for dynamic data replication should be selected based on the analysis of current information systems.