Low Voltage ride through for Solar Power

Abstract

This paper presents a low-voltage ride-through (LVRT) control strategy for grid-connected energy storage systems . The increase in the rated power of PV inverters has brought with it new requirements, such as Low Voltage Ride Through and reactive power compensation. Field testsnin PV plants are too expensive interms of production losses, and therefore laboratory tests have become a simple, flexible and inexpemsive alternative. In this paper, a 100 kW test bench for testing solar inverters has been developed. The DC link is fed by a diode rectifier which only compensates for the power losses of all the elements in the test bench. Low Voltage Ride Through performance of a 500 kW solar inverter can be completely tested at full load. the validity of the proposed VRT control strategy is verified and the variations of the PCC voltage of the Gridconnected ESS are analyzed simulation and experimental results.