IMPROVEMENT OF LOW VOLTAGE RIDE – THROUGH CAPABILITY OF DISTRIBUTED GENERATION IN A MICROGRID USING SUPERCONDUCTING FAULT CURRENT LIMITER

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 paper, the microgrid consists of PV generation system interconnected to main grid and superconducting fault current limiter (SFCL) is implemented in MATLAB/Simulink/SimPowerSystem environment. To validate the effectiveness of the device in the microgrid, transient analysis without and with SFCL for three phase line to ground fault is performed. Amongst various SFCL devices, resistive type SFCL device is discussed and analyzed in this paper