A review on enhancing fault ride-through capability of distributed generation in a microgrid

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. This paper provides an overview of distributed generation and its impact on distribution system operation. The novel feature of this paper is to study a new concept called FRT requirements and various methods for enhancing FRT capability.