Different LVRT Performance Analysis of PV Inverters in the Large-Scale Photovoltaic Cluster Transmission by VSC-HVDC

In the sending-end grid of large-scale photovoltaic (PV) cluster transmission by voltage source converter based high voltage direct current (VSC-HVDC), the converters are typically located at considerable distances from one another. When a short circuit fault occurs in the grid, photovoltaic power plants are affected differently due to the different distances of individual PV power plants from the fault point. As a result, PV power plants may enter different low voltage ride through (LVRT) performances and present different performances during the fault. This paper proposes a range of potential LVRT performances that may be arise during grid faults. Simulations of three-phase short circuit faults in the sending-end grid of large-scale photovoltaic cluster transmission by VSC-HVDC at different locations will be performed, to analyze the LVRT performances of PV inverters. Several patterns of LVRT performances will be defined according to the simulation results and provide effective information for the improvement of LVRT control strategies.