The complex working environment of distribution networks tends to cause impermanent single-phase-to-ground (SPG) fault

and high-temperature ground fault arc is prone to endanger lives and power equipment

resulting in large-scale power outages and fire accidents. Thus

fault arc should be extinguished in time. Meanwhile

stable operation conditions of distribution networks and reliable load power supply should be guaranteed to provide high-quality customer service. This paper proposes an active mitigation strategy for SPG fault

and provide active and reactive power compensation at the same time by utilizing an improved flexible power electronic equipment (FPEE) with dc-link sources. These controls are decoupled from each other

so utilization of FPEE is maximized as much as possible. When a SPG fault occurs in distribution networks

FPEE can output

simultaneously

active power

reactive power

and SPG fault compensation current by controlling output current on the d

q

0 coordinate system

respectively. During normal operation of distribution networks

the FPEE can be used as a virtual synchronous generator to compensate load power and its fluctuation. The proposed simultaneous multi-function can also be applied in other cases. Simulation cases are implemented to verify principles and practicability.