The load ratio of transformers could be improved with the integration of distributed generators. A calculation method for the maximum load ratio of transformer is proposed considering the distributed PV and storage. The feature of the method is that the distributed PV and storage system is handled as a special transformer, whose power supply capability is zero while improving other transformers’ load ratio. Taking power supply reliability as core index, the maximum load ratio values of transformers are explored. The effectiveness of the proposed method is verified by simulation results.
Keywords transformer, the maximum load ratio, distributed PV, storage, power supply reliability