Mechanism of second harmonic generation of photovoltaic grid-connected system faults and its impact on transformer protection
The short-circuit transient characteristics of photovoltaic(PV) power system are different from traditional power sources.When the grid voltage drops, the output current of PV will contain a high proportion of second harmonics which cannot be ignored.This paper takes a single-phase turn-to-turn Weekender short-circuit fault inside the PV grid-conne