MECHANISM OF SECOND HARMONIC GENERATION OF PHOTOVOLTAIC GRID-CONNECTED SYSTEM FAULTS AND ITS IMPACT ON TRANSFORMER PROTECTION

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

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