Photovoltaic grid-connected converter

The photovoltaic grid-connected converter structurally comprises a wire, an insertion end, a conductive needle, a clamping mechanism, a conductive plate, a compression spring and a fixed end, the wire is connected with the insertion end, the conductive needle is arranged at the insertion end and elastically slides in a spring sliding rail through a sliding shaft to be adjusted, elastic force is applied to an abutting plate, and the clamping mechanism is clamped on the abutting plate. The upper and lower abutting plates can firmly abut against the outer side of the insertion end, it is ensured that the insertion end is firmly clamped into the insulation ring after being clamped into the embedding groove, interruption in the current conversion process due to the falling-off condition is avoided, and the current conversion stability is improved; the reactive power compensator in the compensation mechanism works, the stability of a power system is improved, the system damping is increased, and the system oscillat