Saturation nonlinearities caused by control limiters will be activated during large disturbances, complicating the stability of grid-tied voltage source converters (VSCs). This letter investigates large-disturbance synchronization VSC considering two typical limiters, i.e., hard limiter reference current and circular used to avoid overmodulation. A unified differential equation (UDE) model is p...

Although the introduction of distributed generation (DG) in a distribution system improves the power quality of power system, it increases the fault current level reducing voltage at point of common-coupling (PCC). Hence, there is a need of improving fault ride-through (FRT) capability to avoid sudden tripping of DG units from the utility grid during voltage sag in a faulty condition. In this p...

This paper proposes an optimal design of Shunt-Resonance Fault Current Limiter (SRFCL) to enhance the Ride-Through (FRT) capability and improve transient stability a grid-connected hybrid PV/wind power system. The parameters SRFCL are optimized by using Particle Swarm Optimization (PSO) technique. proposed topology is designed in such way that it can provide superior protection for limiting fau...