A superconducting magnetic energy storage with dual functions of active filtering and power fluctuation suppression for photovoltaic microgrid

•The superconducting magnetic energy storage (SMES) based on shunt active power filter (SAPF) provides an integrated protection for harmful currents and power fluctuations in photovoltaic (PV) microgrid, which makes the cost of SAPF-based SMES more economical as a power system stabilizer.•The modified ip−iq method combining instantaneous reactive power theory and power decoupling control is proposed to extract reference current.•The fuzzy logic control method is designed to maintain the DC-link voltage stability and reduce depth of discharge of SMES.