A Comprehensive Review of Control Strategies to Overcome Challenges During LVRT in PV Systems

Due to the high penetration of grid-connected photovoltaic (GCPV) systems, network operators are regularly updating grid codes ensure that operation GCPV systems will assist in maintaining stability. Among these, low-voltage-ride-through (LVRT) is an important attribute PV inverters allows them remain connected with during short-term disturbances voltage. Hence, equipped control strategies secure their smooth through this ride-through period as per specified code. During injection reactive power under LVRT condition, various challenges have been observed, such inverter overcurrent, unbalance phase voltages at point common coupling (PCC), overvoltage healthy phases, oscillations active, and dc-link voltage, distortion injected currents poor dynamic response system. Several found literature overcome these associated LVRT. This paper provides a critical review on recent conditions inverters. The drawbacks conventional current investigated MATLAB/Simulink environment each category advanced strategy analyzed different types faults. Moreover, work categorizes state-of-the-art techniques basis synchronization methods, voltage strategies. It like OVSS/OCCIDGS improved support limitation which results by injecting enhanced quality.