The Photovoltaic-Energy storage-Direct current-Flexibility system (PEDF) can achieve efficient coordination between generation, grid, load, and storage, but it relies heavily on the stability of the DC bus voltage. The loads within buildings are often complex and random, making the issue of DC bus fluctuations a primary research focus.

The prerequisite for bus voltage stability is power balance. In this work, we propose using superconducting magnetic energy storage (SMES) technology to enhance the energy absorption capacity of the entire DC microgrid. First, we analyze the operating mechanism of SMES in response to voltage fluctuations during transient processes. Then, we compare the extent of voltage fluctuations before and after the application of SMES in simulations. Both theoretical and simulation results show that the SMES system can significantly improve the voltage stability of the system on a transient time scale.