Research on Operation Characteristics of Distributed PV based on Measured Data

With the increasing penetration of distributed photovoltaic(PV), the fluctuation of high-permeability PV will have a series of impacts on the power grid. The analysis of power quality characteristics at the voltage levels of PV low-voltage grid-connected point (380V) and PV concentrated grid-connected point (10kV) is the basis for the study of PV grid-connected related problems. First, the principle of distributed PV power generation, the principle and structure of grid-connected system, and the influence of grid-connected distributed PV power generation on power grid system are analyzed. Then, based on the measured data of single household distributed PV power generation, the output and operation characteristics of distributed PV power generation are studied. At last, combined with the measured data of PV power generation grid, the multi-index power quality problem of PV power generation grid is analyzed theoretically and experimentally.