Nowadays, the problem arising from power system simulation data exchange between different propriety formats is very common but not properly solved, owing to the great difference between their formats. A PSD-BPA/ODM adapter is developed to exchange data between the two, after successfully building the BPA dynamic models in an open data model(ODM) through model extension. The proposed adapter also helps to realize BPA-ODM-InterPSS data conversion. Finally, the tests with an IEEE 9-bus system and a real system testify the correctness of the adapter. The whole process demonstrates that it is feasible and easy to use ODM for data exchange. The adapter is publicly available under the ODM project, and can serve as an example to help develop adapters for other formats.