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 short-circuit fault inside the PV grid-connected transformer as an example. https://allfixelectricales.shop/product-category/hdmi-video-connecting-cable/