Comparison of some low voltage ride-through strategies

摘要

PV system integration with power grid has many challenges. One of these challenges, the disconnection of PV inverters from the grid under grid faults; these disconnections lead to a stability problem in larger scale of PV power plant. This paper is focused on the comparison of some Low voltage ride-through strategies. The two-stage PV inverter configuration and its conventional control methods were discussed, then the DC braking Chopper (BC) LVRT strategy was compared to avoided the MPPT operation during the LVRT operation (A-MPPT) strategy. The proposed strategies were verified by a simulation of a grid connected PV system using MATLAB/Simulink software.